-
Yang Yang, Yongnan Zhao, Jianguo Yu, Nan Pang, Hao Su, Sha Pang
2008 Volume 37 Issue 7 Pages
678-679
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Neutral open-structured metal phosphites of Al and In are hydrothermally synthesized; they are structural analogues that constructed by HPO
3 and MO
6 groups with intersecting eight- and 10-ring channels. The two metal sites serve as four- and five-connected centers, respectively, with the rest oxygen atoms belonging to the coordinated water molecules.
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Myong Euy Lee, Young Mook Lim, Joo Young Son, Won Guk Seo
2008 Volume 37 Issue 7 Pages
680-681
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Supplementary material
The stable bromodilithiosilane at room temperature was synthesized in 86% yield by the reduction of the corresponding tribromo[tris(trimethylsilyl)methyl]silane with lithium naphthalenide.
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Koichiro Takao, Yasuhisa Ikeda
2008 Volume 37 Issue 7 Pages
682-683
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Supplementary material
An alternative synthetic route to metal halide free ionic liquids using trialkyloxonium salt is proposed. Utility of this synthetic route has been demonstrated by preparing 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid through the reaction between 1-methylimidazole and triethyloxonium tetrafluoroborate in anhydrous ether.
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Hiromitsu Uehara, Tomohiko Inomata, Masaaki Abe, Kohei Uosaki, Yoichi ...
2008 Volume 37 Issue 7 Pages
684-685
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Supplementary material
Interfacial ligand substitution of triruthenium(III) complexes confined on gold as a monolayer has proven to be useful to construct molecular heterostructures by quantitatively incorporating 4,4′-bipyridine-anchored diruthenium(III) complexes, whose multi-step redox sequence is reversibly tuned by proton-coupled electron-transfer reactions.
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Eunhee Lim, Byung-Jun Jung, Sung Min Kim, Bong Ok Kim, Hong-Ku Shim
2008 Volume 37 Issue 7 Pages
686-687
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A series of ter(9,9-dialkylfluorene)s (TFs) containing cyclohexyl and hexyl side groups has been synthesized via the Suzuki coupling reaction. Their chemical structures were characterized by
1H NMR and
13C NMR. All TFs were soluble in common organic solvents and showed good thermal stability up to 400 °C. In particular, T(CHC)F composed of two 9,9-bis(cyclohexylmethyl)fluorenes and one dihexylfluorene showed improved thermal stability over T(HHH)F and was found to be amorphous, unlikely with T(CCC)F. A light-emitting diode device fabricated with an ITO/2-TNATA/NPB/TFs/Alq
3/Liq/Al configuration exhibited blue light emission with EL maxima at 450 nm and EL efficiency of 1.1 cd/A.
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Yuu Sakurada, Shunsuke Suzuki, Munetoshi Sakai, Akira Nakajima, Yoshik ...
2008 Volume 37 Issue 7 Pages
688-689
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Supplementary material
The effect of liquid viscosity on the internal fluidity of droplets during sliding on an inclined Si surface treated with fluoroalkylsilane (FAS) was investigated for water–glycerin mixture using particle image velocimetry (PIV). Increasing viscosity remarkably decreases the slipping motion on the solid–liquid interface and overall sliding acceleration. It affects the rolling motion, but its degree of influence is smaller than that on slipping. The viscosity had different contributions to slipping and rolling motions of the droplets.
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Takeshi Komino, Hiroyuki Tajima, Masaki Matsuda
2008 Volume 37 Issue 7 Pages
690-691
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Supplementary material
Simultaneous measurement of molecular orientation and current as a function of voltage has been conducted. Molecular orientation was measured using the polarization dependence of intramolecular electronic transition. In ITO/poly(3-hexylthiophene)/Al structure, it was found that the molecular orientation change assists the hysteretic current–voltage (
J–
V) characteristics. The result indicates that this measuring method can be useful in investigating the effects of molecular orientation change on unusual
J–
V characteristics.
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Yajuan Li, Huihua Song, Tao Wang, Miying Jia
2008 Volume 37 Issue 7 Pages
692-693
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Supplementary material
The hydrothermal reaction of Ag
2SO
4, pyridine-3,4-dicarboxylic acid (H
2PDC), LiF, and H
2O led to the formation of a novel complex, [Ag
2(PDC)]
n (
1). X-ray crystal structural analysis indicates that
1 has a 3D coordinated framework, which contains a mono- and dinuclear mixed 1D polymeric chain. Fluorescent analyses of
1 show intense photoluminescence at 510 nm in the solid state, suggesting potential candidates for photoactive material.
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Daisuke Kato, Katsuya Inoue, Jun Akimitsu, Jiro Abe
2008 Volume 37 Issue 7 Pages
694-695
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Supplementary material
An unprecedented conjugated radical polymer, poly-BDPI-2Y, consisting of imidazolyl radical was prepared and its magnetic properties were investigated. The SQUID measurement proves the presence of the ferromagnetic fraction at 300 K.
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Suzumi Hashimoto, Natsumi Sakuma, Hidetsugu Wakabayashi, Hiroshi Miyam ...
2008 Volume 37 Issue 7 Pages
696-697
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Dynamic interconversion between the two enantiomeric hemiacetal structures in acetonitrile was revealed from the variable-temperature
1H NMR spectra for the compounds obtained by the reaction of ninhydrin with phenol and
p-nitrophenol.
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Kohei Nakamoto, Ryoji Kurita, Naoyuki Sekioka, Osamu Niwa
2008 Volume 37 Issue 7 Pages
698-699
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Supplementary material
Disease marker protein and a correction marker were simultaneously measured with a portable surface plasmon resonance (SPR) system and PDMS microchannel. Two gold films in the microchannel were modified with antibody and redox polymer containing horseradish peroxidase (HRP). Creatininase, creatinase, and sarcosine oxidase were immobilized in the upstream. We could measure glycoprotein, transferrin (MW: 75 kDa) and creatinine (MW: 113) both by SPR angle shifts caused by immuno- and redox reactions, indicating that urinary transferrin concentration could be normalized with creatinine concentration by single injection.
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Tatsuya Kameyama, Ken-ichi Okazaki, Yuji Ichikawa, Akihiko Kudo, Susum ...
2008 Volume 37 Issue 7 Pages
700-701
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Multilayer films of layered double hydroxide (LDH) nanosheets and semiconductor nanoparticles of ZnS–AgInS
2 solid solution (ZAIS) or CdS were prepared by a layer-by-layer deposition technique. The photoluminescence properties were remarkably dependent on the stacked structure of the films owing to the energy transfer from CdS to ZAIS nanoparticles.
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Mika Wakabayashi, Shigekatsu Fujii, Tomoyuki Morita, Shunsaku Kimura
2008 Volume 37 Issue 7 Pages
702-703
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A novel helical peptide derivative with an intervening azobenzene unit was synthesized, and the effects of the peptide segments on the electronic properties of the azobenzene unit, immobilization on solid surfaces, and photoisomerization in solution and on surface were studied.
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Makoto Michida, Teruaki Mukaiyama
2008 Volume 37 Issue 7 Pages
704-705
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A highly useful method for the synthesis of α,β-unsaturated carboxylic esters from various carbonyl compounds that uses trimethylsilylbetene ethyl trimethylsilyl acetal in the presence of a Lewis base catalyst such as acetate salts was established. This procedure gives the corresponding esters in high yields with excellent E stereoselectivity under mild conditions.
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Jui-Chi Lee, Ing-Chi Leu, Min-Hsiung Hon
2008 Volume 37 Issue 7 Pages
706-707
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We demonstrate a simple and novel approach for the low-temperature (400 °C) solid-state growth of ZnO micro- and nanorods directly from sol–gel-derived Al-doped ZnO films on silicon substrates without any catalyst. Hot pressing the films by a PDMS pad before annealing has been found to be effective for the creation of ZnO rods. A possible nucleation mechanism of ZnO rods has also been proposed.
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Hisako Iwahashi, Tatsuya Oka, Atsushi Abiko
2008 Volume 37 Issue 7 Pages
708-709
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Poly(
L-lactic acid) of
Mw≈160000 (PDI = 1.6) was produced by direct polycondensation of water-containing lactic acid using triphenylphosphonium triflate as a catalyst.
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Tetsuya Nanba, Shouichi Masukawa, Junko Uchisawa, Akira Obuchi
2008 Volume 37 Issue 7 Pages
710-711
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Pt/TiO
2 showed high selectivity toward NH
3 formation in the conversion of NO and CO in the presence of H
2O, higher than that observed for the reaction of NO with H
2.
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Jing Li, Liancheng Wang, Zhicheng Ju, Liqiang Xu, Yitai Qian
2008 Volume 37 Issue 7 Pages
712-713
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Crystalline TiN hollow nanocages with pure cubic phase were prepared in large scale using TiO
2, N
2H
4·2HCl, and Mg as reactants in autoclaves in 300–500 °C for 12 h. These hollow nanocages mainly have diameters of 300 to 500 nm and shell thicknesses from 20 to 35 nm. The product obtained with target temperature of 500 °C has a BET surface area of 68.13 m
2/g and pore volume of 0.17 cm
3/g.
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Hirotsugu Takizawa, Akio Hagiya, Takuya Aoyagi, Yamato Hayashi
2008 Volume 37 Issue 7 Pages
714-715
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TiO
2–SnO
2 composite with the modulated lamellar structure was obtained within a short period by microwave irradiation using 28-GHz frequency. Single-phase solid solution with the rutile-type structure was formed at the early stage of irradiation, and the prolonged irradiation caused the formation of mesoscopic lamellar structure induced by spinodal decomposition. Such a nonequilibrium nature is believed to be due to selective heating behavior under microwave irradiation.
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Hisako Sato, Jun Kameda, Yutaka Fukuda, Masa-aki Haga, Akihiko Yamagis ...
2008 Volume 37 Issue 7 Pages
716-717
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Supplementary material
A chiral tri-nuclear metal complex, ΔΔΔ- or ΛΛΛ-[Ru(acac)
2(taet)Ru(acac)(taet)Ru(acac)
2] (acac = acetylacetonato and taet = tetraacetylethanato), was prepared and its monolayer behavior was investigated, leading to the conclusion that the bead-like character of the trimer was an essential factor in achieving stable two-dimensional molecular packing.
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Yukichi Horiguchi, Shuji Yamashita, Takuro Niidome, Naotoshi Nakashima ...
2008 Volume 37 Issue 7 Pages
718-719
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Supplementary material
Near-infrared pulsed-laser irradiation of silica-coated gold nanorods loaded with single-stranded oligonucleotides induced the release of the oligonucleotides without changing the morphology of the gold nanorods into spherical particles. Silica layers on the gold nanorods were advantageous to realize the efficient release of the oligonucleotides.
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Yusuke Tanabe, Yoshiyuki Mizuhata, Norihiro Tokitoh
2008 Volume 37 Issue 7 Pages
720-721
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Supplementary material
A key intermediate for the hydration reaction of [Cr(η
6-silabenzene)(CO)
3], hydrido(η
5-silacyclohexadienyl)chromium complex, was successfully synthesized by the reaction of silabenzene complex with 2 mol equiv of H
2O. X-ray diffraction study revealed that the hydroxy group on the central silicon atom is located at the endo position to the metal moiety. The treatment of the endo adduct with excess of D
2O resulted in the stereoselective formation of 1-silacyclohexa-2,4-diene bearing a deuterium atom at the methylene position.
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Chunjuan Tang, Y. X. Zhang, Guozhong Wang, H. Q. Wang, Guanghai Li
2008 Volume 37 Issue 7 Pages
722-723
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A facile solution-phase process has been demonstrated for the preparation of urchin-like bismuth nanostructures by reducing bismuth nitrate with ethylene glycol. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) have been used to characterize the as-prepared products. The formation mechanism has been proposed.
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Ryo Shintani, Tamio Hayashi
2008 Volume 37 Issue 7 Pages
724-725
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Supplementary material
A ruthenium-catalyzed 1,4-addition of organoboronic acids to α,β-unsaturated ketones has been developed. The use of 2-(di-
tert-butylphosphino)biphenyl as the ligand in combination with [RuCl
2(
p-cymene)]
2 complex catalyzes these reactions to selectively give 1,4-adducts in good yield by effectively suppressing Heck-type and reduced products.
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Yoshitane Imai, Katuzo Murata, Hideki Matsuno, Kensaku Kamon, Tomohiro ...
2008 Volume 37 Issue 7 Pages
726-727
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Supplementary material
A chiral supramolecular organic fluorophore is developed by using achiral biphenyl-4-carboxylic acid and
rac-1-phenylethylamine. This fluorophore is a spontaneously resolved chiral fluorescence system.
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Akio Katsuki, Hiromi Yamamoto, Yoshihisa Fujiwara, Masao Fujiwara, Mor ...
2008 Volume 37 Issue 7 Pages
728-729
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A poly(vinyl alcohol) (PVA) thin film in which multiwall carbon nanotubes (MWCNTs) were included was prepared in a magnetically simulated microgravity condition. The XRD pattern results and AFM observations showed that the nanotubes were oriented parallel to the surface of the film at the zero field. In contrast, they were oriented perpendicularly in the magnetic field.
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Bo Zhou, Jian-Ming Hong, Jun-Jie Zhu
2008 Volume 37 Issue 7 Pages
730-731
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A general hydrothermal method was developed for the preparation of well-crystallized V
2VI
3 (V = Sb and Bi; VI = S, Se, and Te) thermoelectric nanomaterials directly from the corresponding elemental powders. X-ray diffraction (XRD), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) techniques were used to characterize the products and investigate the possible reaction mechanism.
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Kenta Kokado, Yoshiki Chujo
2008 Volume 37 Issue 7 Pages
732-733
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Poly(
p-phenyleneethynylene) (PPE) and silica gel polymer hybrids were synthesized from the PPE together with tetramethoxysilane (TMOS) via a sol–gel method by utilizing cationic groups on the side chain of PPEs. Up to 10 wt % of the cationic PPE was able to disperse homogeneously into a silica matrix without any compatibilizer. Compared to amino and ammonium groups, PPE having imidazolium groups exhibited high dispersity in silica gel. The photoluminescence of the cationic PPE was reinforced against the thermal irradiation by the surrounding polymer hybrid matrix.
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Norihito Hiyoshi, Chandrashekhar V. Rode, Osamu Sato, Yoshio Masuda, A ...
2008 Volume 37 Issue 7 Pages
734-735
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Supplementary material
Naphthalene hydrogenation over activated carbon-supported rhodium metal particles having dispersion between 10 and 30% was studied; the turnover frequencies increased with decreasing dispersion in supercritical carbon dioxide, while were independent of the metal dispersion in
n-heptane.
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Zhe Chen, Minhua Cao, Xiaoyan He
2008 Volume 37 Issue 7 Pages
736-737
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Supplementary material
Nickel hierarchical superstructures have been successfully produced via a simple surfactant-assisted hydrothermal method. The resulting superstructures are formed by the self-assembly of sea urchin-shaped microspheres. Here, poly(vinylpyrrolidone) (PVP) plays an important role in the formation of such structures. A feasible formation mechanism was proposed. The magnetic measurement suggests that the nickel superstructures exhibit ferromagnetic behavior at room temperature.
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Liucheng Li, Liping Duo, Bailing Yang
2008 Volume 37 Issue 7 Pages
738-739
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Supplementary material
When gaseous iodine was admitted into the NCl
3 autodecomposition flame, intense I(5
2P
1⁄2) → I(5
2P
3⁄2) emission was observed owing to direct pumping of iodine atoms by NCl
3 flame. It is found that the chemical environment of NCl
3 flame is benign for I(5
2P
3⁄2). The mechanisms of I(5
2P
1⁄2) production in the NCl
3/I
2 reactive gas flow are discussed for the first time. It is believed that Frank–Condon favored
E–
E energy transfer from Cl
2(B) to I(5
2P
3⁄2) and the nearly resonant
V–
E energy transfer from Cl
2(X,
v=15) to I(5
2P
3⁄2) respond for the production of excited state iodine atoms.
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Yoichiro Kuninobu, Kou Kikuchi, Kazuhiko Takai
2008 Volume 37 Issue 7 Pages
740-741
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Supplementary material
Hydantoin derivatives were obtained by the reactions of terminal alkynes with isocyanates in the presence of a catalytic amount of a manganese complex, MnBr(CO)
5. This reaction also proceeded using a rhenium complex, Re
2(CO)
10, or an iron complex, Fe(CO)
5, as a catalyst.
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Yong Zhang, Yan Xiong, Chun Li, Junbiao Peng, Yong Cao
2008 Volume 37 Issue 7 Pages
742-743
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A novel series of electrophosphorescent conjugated polyfluorenes (PFOPPyIr) based on (4,4′-dibromophenylpyridinato-
N,
C2)bis(2-phenylpyridinato-
N,
C2)iridium(III) were synthesized, in which the polymer main chains consist phenylpyrridine ligand and fluorene segment with extended conjugation. The optical and electroluminescent properties of PFOPPyIr were investigated. A luminance efficiency of 3.80 cd/A and luminance of 1248 cd/m
2 were achieved.
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Ismail O. Kady
2008 Volume 37 Issue 7 Pages
744-745
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ZnCl
2 supported on silica gel has shown to be an effective catalyst for transesterification of the organophosphate insecticide, paraoxon, in the presence of 2-phenylethanol. The kinetics of the reaction in acetonitrile was studied. Formation of the product diethyl 2-phenylethyl phosphate was confirmed by
31P NMR.
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Xue-Jun Zhang, Tian-Yi Ma, Zhong-Yong Yuan
2008 Volume 37 Issue 7 Pages
746-747
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Macroporous titanium tetraphosphonate materials with intraframework ethylenediamine groups and hierarchical mesostructure in the walls were synthesized by a simple surfactant-free process with the use of sodium salt of ethylenediamine-
N,
N,
N′,
N′-tetrakis(methylenephosphonic acid), possessing large capacity for heavy metal ion adsorption with a preference sequence of Cd
2+ < Cu
2+ < Pb
2+.
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Yu Horiuchi, Kohsuke Mori, Norikazu Nishiyama, Hiromi Yamashita
2008 Volume 37 Issue 7 Pages
748-749
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Supplementary material
Using a sol–gel/spin-coating method, transparent mesoporous silica thin films containing single-site photocatalyst (Ti, V, Cr, Mo, and W oxide moieties) (Me-MSTFs) could be prepared on quartz plates. All Me-MSTFs have exhibited strong hydrophilic surface properties even before UV-light irradiation and showed photoinduced superhydrophilic properties after UV-light irradiation. Among examined samples, the W-MSTF showed the highest hydrophilicity.
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Lars Weber, Steffi Sensfuss, Uwe Ritter, Peter Scharff
2008 Volume 37 Issue 7 Pages
750-751
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Supplementary material
Mono-cyclopropanated C
120O was prepared to obtain soluble, longish electron acceptor opening the possibility to make organic photoactive layers of supra-molecular and anisotropic order. The C
120O derivative was characterized by UV–vis spectroscopy, cyclic voltammetry, and thermogravimetric analyses, and applied as electron acceptor in a bulk-heterojunction polymer solar cell. The C
120O derivative is appraised to be a valuable electron acceptor.
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Haiping Qi, Qianwang Chen
2008 Volume 37 Issue 7 Pages
752-753
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Single-crystal plywood-like vonsenite (Fe
3BO
5) nanorods were prepared through a facile hydrothermal method at 140 °C for 40 h with K
4Fe(CN)
6 and NaBH
4 as starting materials. The Fe
3BO
5 nanorods, which are composed of 5 to 7 nanobelts, have a diameter of about 250 nm and length ranging from 7 to 15 μm. The nanorods are identified to grow along the [001] direction. On the basis of the results, the formation process of the Fe
3BO
5 nanorods is discussed. The magnetic measurement indicates that
TN=140 K.
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Takashi Kosone, Chihiro Kachi-Terajima, Chikahide Kanadani, Toshiaki S ...
2008 Volume 37 Issue 7 Pages
754-755
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Supplementary material
A new Hofmann-like heterometal Fe
IIAu
I two-dimensional (2D) spin-crossover compound, {[Fe
II(pyridine)
2][Au
I(CN)
2]
2}
n (
1) and its isotope-substituted analogues {[Fe
II(pyridine-D
5)
2][Au
I(CN)
2]
2}
n (
2) and {[Fe
II(pyridine-
15N)
2][Au
I(CN)
2]
2}
n (
3) have been synthesized in a simple synthetic method and characterized crystallographically and magnetically. Complex
1 consists of an octahedral Fe
II ion coordinated with the pyridine ligands and a mononuclear [Au
I(CN)
2]
− unit with a linear coordination geometry, which combine to form an infinite 2D structure. The spin transitions observed for
1 and
3 are accompanied by drastic and reversible change of color from colorless to purple. In complexes
1 and
3, about 10 and 3.5% high-spin states are changed to low-spin states at 75 K. However, HS states in
2 are slightly more stable than those in
3.
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Teruhiko Kashiwabara, Satoshi Mitsunobu, Anirban Das, Takaaki Itai, Ma ...
2008 Volume 37 Issue 7 Pages
756-757
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Oxidation states of Sb and As in marine ferromanganese oxides determined by X-ray absorption near-edge structure showed that both As and Sb are pentavalent in the ferromanganese oxides. The concentration ratios of As/Sb in the ferromanganese oxides are similar to those in seawater. There results are consistent with the fact that As and Sb behave similarly, especially under oxic conditions as suggested from other studies in soil–water and river–sediment systems.
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Aya Tanaka, Yasutaka Matsuo, Kenichi Niikura, Kuniharu Ijiro
2008 Volume 37 Issue 7 Pages
758-759
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Supplementary material
The effect of 5′-phosphorylation at nicks on DNA stabilization was measured through the formation of DNA multiassemblies consisting of 40-mer half-sliding complementary oligonucleotides, which had overlapping complementary 20-mer base sequences. 5′-Phosphorylated oligonucleotides formed longer DNA multiassemblies than 5′-hydroxylated ones. This result indicated that the 5′-phosphorylated sticky ends contribute to the stabilization of the DNA association due to the hydrogen bonds between 3′-hydroxy groups and 5′-phosphate groups at the nick positions.
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Yuya Oso, Daisuke Kanatsuki, Shuichi Saito, Takashi Nogami, Takayuki I ...
2008 Volume 37 Issue 7 Pages
760-761
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Supplementary material
We have prepared spin-crossover [FeL
2(NCS)
2] complexes chelated with alkylated
N-(di-2-pyridylmethylene)anilines. The wider irreversible thermal loop across room temperature was observed with the longer alkyl chain introduced (Δ
TC = ca. 90 K for a
n-C
16H
33 derivative). Pressurization prohibits the solid–solid phase transition, leading to the reversible spin crossover.
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Yiguo Su, Guangshe Li, Xiaobo Chen, Junjie Liu, Liping Li
2008 Volume 37 Issue 7 Pages
762-763
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Supplementary material
A novel white-light phosphor GdVO
4:Ho
3+ was prepared via a simple hydrothermal reaction route. Under ultraviolet excitation, the as-prepared nanocrystals showed a broad band emission and sharp lines, which are associated with the oxygen vacancies around V
4+ ions and the typical f–f transitions of Ho
3+ ions, respectively. The coexistence of broad emission and sharp lines results in the bright white light with a quantum yield of 28%.
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Tomohiro Seki, Shiki Yagai, Takashi Karatsu, Akihide Kitamura
2008 Volume 37 Issue 7 Pages
764-765
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Supplementary material
Miniaturization of nanofibers formed from melamine-appended perylene bisimides and cyanurates are achieved by elongating the linker moieties between perylene bisimide core and melamine moieties. The resulting nanofibers gelate aliphatic solvents with low concentrations and the resulting gels are optically transparent, which are advantageous for photonic devices because no scattering of visible light takes place.
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Masashi Mamada, Jun-ichi Nishida, Shizuo Tokito, Yoshiro Yamashita
2008 Volume 37 Issue 7 Pages
766-767
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Supplementary material
Benzo[1,2-
d:4,5-
d′]bisthiazole (BBT) derivatives were newly synthesized, and the crystal structure, optical and electrochemical properties were investigated. They were applied for organic field-effect transistors (OFET) as n-channel semiconductors. Although their thin films have relatively rough surface, the devices showed high-performance OFET characteristics. The thin film of
2 exhibited the electron mobility of 0.24 cm
2 V
−1 s
−1.
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Hajime Eguchi, Yoshiki Ohgo, Akira Ikezaki, Saburo Neya, Mikio Nakamur ...
2008 Volume 37 Issue 7 Pages
768-769
Published: July 05, 2008
Released on J-STAGE: June 14, 2008
JOURNAL
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Bis(1-methylimidazole) complex of iron(III) oxypyriporphyrin adopts an essentially pure intermediate-spin (
S=3⁄2) state at 298 K, which is the first example of the iron(III) porphyrinoid adopting the
S=3⁄2 in spite of the bis-coordination of imidazole ligand.
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Atsuo Nakazaki, Tomohiro Era, Susumu Kobayashi
2008 Volume 37 Issue 7 Pages
770-771
Published: July 05, 2008
Released on J-STAGE: June 14, 2008
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Supplementary material
A stereocontrolled total synthesis of enantiomerically pure (−)-gleenol using an improved substrate to construct the spiro[4.5]decane through Claisen rearrangement has been achieved. The most striking feature of this synthesis is that the rearrangement of sterically congested dihydropyran, bearing all requisite substituents with proper stereochemistry, afforded the fully functionalized spiro[4.5]decane in a single step.
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Tomonori Matsuoka, Shin-ichi Yamamoto, Osamu Moriya
2008 Volume 37 Issue 7 Pages
772-773
Published: July 05, 2008
Released on J-STAGE: June 14, 2008
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The polysilsesquioxanes (PSQ) having alkoxyethylamide groups were prepared from the silane coupling reagents, prepared by addition reaction of alkoxyethylamines to (3-isocyanatopropyl)triethoxysilane, by condensation under acidic conditions. In the obtained PSQs, those having bis(methoxyethyl)amide or bis(ethoxyethyl)amide group showed reversible thermoresponsive phase separation in an aqueous solution. The PSQs formed by the co-condensation of such silane coupling reagents, the feed mole ratio of which were changed, also showed the thermoresponsive aggregation at the temperatures reflected with the ratios of alkoxyethyl groups.
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Hayato Hoshino, Kazuhisa Sakakibara, Kiyoshi Watanabe
2008 Volume 37 Issue 7 Pages
774-775
Published: July 05, 2008
Released on J-STAGE: June 21, 2008
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Supplementary material
The bond dissociation energy of the C–H bond at the α-position of an ether oxygen in cyclopentyl methyl ether (CPME) has been evaluated theoretically to be 393.3 kJ/mol by using an isodesmic reaction method. Essential factors accounting for this rather higher bond dissociation energy in CPME comparable to secondary C–H bond have been investigated on the basis of the structures and their thermodynamic data such as heats of formation (Δ
Hf°) of CPME radical and relevant ether radicals evaluated by the theoretical approach.
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