-
Yuji Yoshida, Takuya Kurahashi, Seijiro Matsubara
2011 Volume 40 Issue 10 Pages
1067-1068
Published: October 05, 2011
Released on J-STAGE: September 17, 2011
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Supplementary material
A nickel-catalyzed heteroannulation has been developed where
o-haloanilines react with alkynes to afford 2,3-disubstituted indoles. IPr (1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) was found to be an effective ligand for the reaction.
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Hiromu Takiguchi, Ken Ohmori, Keisuke Suzuki
2011 Volume 40 Issue 10 Pages
1069-1071
Published: October 05, 2011
Released on J-STAGE: September 17, 2011
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Supplementary material
Riccardin C (
1) has been synthesized by exploiting an intramolecular S
NAr reaction of α-sulfinylfluorobenzene by an internal phenolate, providing the key 18-membered ring closure in excellent yield.
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Hitoshi Ogihara, Kazuyuki Miyamoto, Kaori Udagawa, Tetsuo Saji
2011 Volume 40 Issue 10 Pages
1072-1073
Published: October 05, 2011
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Supplementary material
Super hard Ni–B/diamond composite coatings were prepared by electrodeposition. Such extreme hardness (ca. 2500 Hv) was ascribed to a large content of diamond particles and hardness of Ni–B matrix. Thermal treatment of the coatings resulted in the formation of Ni–B alloys, which led to increase in film hardness. This method is much simpler than previously reported methods for preparing hard coatings.
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Yun Fang, Ping-Ping Pang, Zhong-Yu Lai
2011 Volume 40 Issue 10 Pages
1074-1076
Published: October 05, 2011
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As a simulacrum of random copolymer poly(acrylamide-
co-acrylic acid), partially hydrolyzed polyacrylamide (HPAM) self-assembled into polymeric micelles in pure aqueous solution in pH response. Spherical nanoparticles (
D = 150 nm) were generated at pH 12, and giant semihexagonal nanoplates (450 nm × 250 nm × 50 nm) were obtained at pH 1.3, but no visible micelles were observed in pH 3–10. This is important for drug release considering the pH environment in human stomach and intestines. The giant semihexagonal micelles obtained at pH 1.3 are hierarchical multivesicular vesicles with the structure of (hydrophilic inner vesicle)@(hydrophobic continuous cyst wall)@(hydrophilic shell). These multivesicular vesicles were formed because the random copolymer has a random distribution of the hydrophilic units in the hydrophobic core. In addition, a new contrast enhancing strategy by in situ reduction gold doping that we established was efficient at illuminating the nanostructure of polymeric micelles with low contrast, and this strategy came with a way to obtain polymer nanoparticles smaller than 20 nm.
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Shokaku Kim, Naoki Ikuhisa, Kazuhiro Chiba
2011 Volume 40 Issue 10 Pages
1077-1078
Published: October 05, 2011
Released on J-STAGE: September 17, 2011
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Supplementary material
Highly polar ammonium ylide intermediates derived from α-halocarbonyl compounds were successfully trapped by cycloalkane phase-tagged activated alkenes via a cycloalkane-based thermomorphic (CBT) process, which allows for facile product isolation using a single liquid–liquid extraction step to effectively generate cyclopropane libraries in the cyclohexane phase.
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Hisaaki Isaji, Atsuo Nakazaki, Minoru Isobe, Toshio Nishikawa
2011 Volume 40 Issue 10 Pages
1079-1081
Published: October 05, 2011
Released on J-STAGE: September 17, 2011
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Supplementary material
Deformylflustrabromine, a marine indole alkaloid, was synthesized from 6-bromotryptamine, a plausible biosynthetic precursor, without protection of the amino group by a two-step reverse prenylation involving the Nicholas reaction and reductive decomplexation of the resulting acetylene dicobalt hexacarbonyl complex.
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Chao Gou, Haiqiang Wu, Sisi Jiang, Chenglin Yi, Jing Luo, Xiaoya Liu
2011 Volume 40 Issue 10 Pages
1082-1084
Published: October 05, 2011
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Supplementary material
A novel easily available chemosensor
1 based on bis(
N-salicylidene)ethylenediamine was reported, which exhibits highly selective and sensitive recognition toward Mn
2+ in pure aqueous solution over a wide range of tested metal ions with a clear naked eye color change from colorless to red. This represents the first reported colorimetric chemosensor capable of detecting Mn
2+ in aqueous solution.
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Jun Oshitani, Nobuhide Kataoka, Mikio Yoshida, Kuniaki Gotoh, Koreyosh ...
2011 Volume 40 Issue 10 Pages
1085-1086
Published: October 05, 2011
Released on J-STAGE: September 17, 2011
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Amorphous calcium phosphate nanoparticles were synthesized by mixing aqueous solutions of Ca(NO
3)
2 and (NH
4)
2HPO
4. Then the particles were matured with sodium bis(2-ethylhexyl) sulfosuccinate (AOT) at various temperatures. Rod-shaped hydroxyapatite (HAp) nanoparticles were formed at maturation temperature ≥40 °C. These results indicate that addition of AOT not during the particles synthesis but during the maturation at more equal critical temperature is a key to form the rod-shaped HAp nanoparticles using AOT.
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Maosen Pan, Xuehao Lin, Zhentao Zhou
2011 Volume 40 Issue 10 Pages
1087-1088
Published: October 05, 2011
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LiFe
0.9V
0.1(PO
4)
0.95F
0.15/C was prepared via solid-state carbothermal reaction (CTR). F and V codoping did not alter the olivine structure of LiFePO
4 but reduced the particle size and improved the Li
+ diffusion coefficient. The cells based on this material showed higher discharge capacity, working voltage, rate capability, and better cyclic performance than that of undoped and F-doped materials.
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Jae-Jin Oh, Yong-Jin Pu, Hisahiro Sasabe, Ken-ichi Nakayama, Junji Kid ...
2011 Volume 40 Issue 10 Pages
1092-1094
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
A series of anthracene derivatives, 9,10-bis(bipyridyl, pyridylphenyl, phenylpyridyl, and biphenyl)anthracenes, were synthesized. They exhibited properties of small electron injection barrier from cathode in electron-only devices, high electron mobility from time-of-flight measurement, and high efficiency and stability of OLEDs.
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Naoki Toshima, Hideo Naohara, Takahiro Yoshimoto, Yasuaki Okamoto
2011 Volume 40 Issue 10 Pages
1095-1097
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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We successfully synthesized Au–Pt bimetallic core–shell nanoparticles by simultaneous reduction covered with a perfluorinated sulfonic acid ionomer (PFSA) in an aqueous solution. The core–shell structure was confirmed by energy-dispersive X-ray spectrometry line analysis. Electrocatalytic activity of the Au–Pt nanoparticles for oxygen reduction reaction was higher than those of PFSA-covered Pt nanoparticles and a conventional carbon-supported Pt catalyst.
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Biao Zhou, Yuji Imai, Akiko Kobayashi, Zheming Wang, Hayao Kobayashi
2011 Volume 40 Issue 10 Pages
1098-1100
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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The dielectric constant (ε) of “water chains” incorporated in the channel of porous coordination polymer crystal [Cu(C
6H
4NO
2)
2] was small at low temperatures (ε ≈ 10) but became as large as 250 at 370 K. These dielectric behaviors were consistent with the results of molecular dynamics simulation and indicated that a melting of hydrogen-bonded water chains occurred above 300 K.
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Tomoaki Watanabe, Keisuke Tajima, JinWang Li, Nobuhiro Matsushita, Mas ...
2011 Volume 40 Issue 10 Pages
1101-1102
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Pure perovskite-type LaTaON
2 crystal powders with high crystallinity were synthesized in supercritical ammonia using sodium amide as a flux. The synthesis temperature for this new method is 873 K, approximately 300 K lower than that for previous methods. The obtained powders have a pseudocubic lattice with a lattice constant of
a = 0.4049 nm, which is in good agreement with the reported value.
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Kimihiro Komeyama, Yuuki Ohama, Ken Takaki
2011 Volume 40 Issue 10 Pages
1103-1104
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
Bi(OTf)
3 was found to be an effective catalyst for a tandem condensation/cyclization of acyloins and β-diketones or β-keto esters to afford highly substituted furans in good yields.
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Keigo Kubota, Hajime Matsumoto
2011 Volume 40 Issue 10 Pages
1105-1106
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
Asymmetric perfluoroamides with Li
+ and Rb
+ exhibited unusual phase transition behaviors such as very slow crystallization and a large shift in melting point of the melt-crystallized salts, which have not been reported in alkali metal salts so far. Considering that corresponding symmetric amides do not exhibit such unique phenomena, the structural asymmetry in anions serves an important role in these phase-transition behaviors.
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Kazuya Nakata, Baoshun Liu, Yosuke Ishikawa, Munetoshi Sakai, Hidenori ...
2011 Volume 40 Issue 10 Pages
1107-1109
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
We have prepared TiO
2 nanotubes by anodization in HF or HF/H
3PO
4 mixed electrolyte. The morphologies and photocatalytic properties of the nanotubes were changed by electrolytes. The nanotubes prepared in HF/H
3PO
4 mixed electrolyte showed higher performance to decompose acetaldehyde by photocatalysis than those prepared in pure HF.
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Rongjun Song, Qing Ji
2011 Volume 40 Issue 10 Pages
1110-1112
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
We demonstrated an efficient improvement of activity of Ni catalysts by combining with Mo and Mg elements, by which massive growth of multiwalled carbon nanotubes (MWNTs) with straight and double helical structures have been achieved from polypropylene (PP) by means of a one-step combustion method. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) are applied to characterize the morphology and the purity of products.
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Satoru Arimitsu, Daisuke Kato, Keiji Maruoka
2011 Volume 40 Issue 10 Pages
1115-1117
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
Although alkyl sulfonates are commonly used for alkylating agents, there are very few reports on phase-transfer-catalyzed asymmetric alkylation with alkyl sulfonates. Herein, we report that the asymmetric reaction using glycine Schiff base
1 and optically pure epoxy triflates
op-
2 proceeded smoothly in the presence of phase-transfer catalyst (
S,
S)-
4a to furnish γ,δ-epoxy-α-amino acids
3 in good yield with high enantioselectivity.
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Ramesh Chitrakar, Yoji Makita, Akinari Sonoda
2011 Volume 40 Issue 10 Pages
1118-1120
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Uptake of Cs
+ on poorly crystalline layered manganese oxide (Na birnessite) is reported. Distribution coefficients (
Kd) showed significant uptake of Cs
+ under acidic (pH 2.4) or basic conditions (pH 10.2). The uptake of Cs
+ takes place with release of Na
+ into the solution confirming ion exchange. The maximum uptake of Cs
+ was 2.0 mmol g
−1 at pH 10.2.
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Hiroyuki Souma, Shigenobu Hayashi
2011 Volume 40 Issue 10 Pages
1121-1123
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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We have attempted to modify the surface of boron nitride (BN) nanoparticles by decylphosphonic acid and have characterized the surface layer of BN nanoparticles by means of high-resolution solid-state
31P NMR. The surface of BN nanoparticles was successfully modified, and the
31P NMR spectra showed two types of bonding states for the organic modifier. They are tentatively assigned to P–B and P–N bonding states from consideration of the residual line broadening due to interaction with quadrupole nuclei.
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Tsutomu Takizawa, Tatsuo Arai
2011 Volume 40 Issue 10 Pages
1124-1126
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
Exciplex-induced isomerization played a key role in highly efficient photoisomerization of stilbene-cored poly(benzyl ether) dendrimers tethering two alkoxycarbonyl surface functional groups at the meta position of each terminating phenyl group. This is the first report on the control of photochemical behavior of dendrimers using intramolecular exciplex formation.
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Laiping Zhang, Yunle Gu, Chunxiao Ge, Jisheng Chang
2011 Volume 40 Issue 10 Pages
1127-1128
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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An intermediate-frequency furnace was used for continuous production of hexagonal boron nitride (h-BN) by heating a mixture of C
3N
6H
6 and H
3BO
3 in a flowing nitrogen gas at 1800–1950 °C. The products were examined by XRD, Raman, FTIR, and SEM. The results indicate the as-synthesized products are h-BN flakes with a purity of 98.73 wt %. A possible reaction mechanism is discussed.
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Mitsuru Kitamura, Masato Kisanuki, Rie Sakata, Tatsuo Okauchi
2011 Volume 40 Issue 10 Pages
1129-1131
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Pd(II)-catalyzed formal O–H insertion reaction of diazonaphthoquinones to acetic acid proceeded to afford 1,2-naphthalenediol monoacetates. In the presence of lithium halides, halonaphthols were obtained under the reaction conditions.
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Yuji Shibasaki, Takanori Koizumi, Naoya Nishimura, Yoshiyuki Oishi
2011 Volume 40 Issue 10 Pages
1132-1134
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
Chemoselective polycondensation of 2-amino-4,6-dichloro-1,3,5-triazine (ADCT) was investigated with various aromatic diamines such as 4,4′-oxydianiline (ODA), 9,9-bis(4-aminophenyl)fluorene (BAFL), 4,4′-(hexafluoropropane-2,2-diyl)dianiline (BisAF), and bis(4-aminophenyl)sulfone (SODA) in the presence of potassium carbonate as a base. High-molecular weight perfectly linear polyguanamines (
Mn ≈ 46000) were successfully obtained for the polycondensation of ADCT with BisAF, while the polycondensation of ADCT with BAFL afforded branched polyguanamines with a degree of branching of from 0.02 to 0.17.
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Xuhong Ren, Jingjing Wang, Liu-Lan Shen, Wei Li, Osamu Muraoka, Maoshe ...
2011 Volume 40 Issue 10 Pages
1135-1137
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
Resokaempferol 3-
O-β-
D-glucoside, an artificial flavonol glycoside, was synthesized from 2,4-dihydroxyacetophenone in six steps and 40% overall yield via an efficient glycosylation method using NaH.
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Akihiro Matsubayashi, Kenji Fukunaga, Tetsuro Tsuji, Kikuo Ataka, Hisa ...
2011 Volume 40 Issue 10 Pages
1138-1139
Published: October 05, 2011
Released on J-STAGE: September 23, 2011
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Supplementary material
The optical characteristics of polymer/metal composite films having metal nanoparticles periodically aligned in rows were explored. They were prepared by irradiating ultraviolet light on the polymer films containing metal complex spin-coated on a reflective surface. The films were found to exhibit band-selective mirror characteristics. The wavelength of maximum reflection can be controlled by changing the incident angle of the irradiating light.
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Tarek A. Salama, Saad S. Elmorsy, Abdel-Galil M. Khalil, Mohamed A. Is ...
2011 Volume 40 Issue 10 Pages
1149-1151
Published: October 05, 2011
Released on J-STAGE: September 28, 2011
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A simple and mild one-pot procedure for the synthesis of carbamoyl azides from acyl chlorides utilizing a combination of tetrachlorosilane and sodium azide in acetonitrile at ambient temperature is reported. Under gentle heating, 1-aryltetrazolin-5-ones were also obtained in one-pot process presumably via a [3 + 2] cycloaddition step.
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Kazutake Takada, Tetsuya Ohara, Kouki Takeue, Natsumi Ishikura, Chie K ...
2011 Volume 40 Issue 10 Pages
1152-1153
Published: October 05, 2011
Released on J-STAGE: September 28, 2011
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A molecular valve, consisting of a poly(acrylic acid) gel-coated Au mesh and a Au mesh working electrode, allowed electrochemically control of a concentration where the valve opens. At open circuit and when +0.9 V vs. Ag/AgCl was applied to the Au mesh electrode, the valve opened at concentration higher than 3–4 × 10
−4 M. At −0.7 V it increased to 9 × 10
−4 M. On the other hand, it remained virtually constant for Ca
2+ at those potentials.
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B. V. V. S. Pavan Kumar, K. K. R. Datta, Muthusamy Eswaramoorthy
2011 Volume 40 Issue 10 Pages
1154-1156
Published: October 05, 2011
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Supplementary material
The use of two-dimensional templates like clay, in the synthesis of graphitic carbon nitrides, make it feasible to form exfoliated layer like structures by polymerization of the precursors in the clay galleries. We have used clay linked with aminopropyl groups, aminoclay, to template the carbon nitride into mesolamellar structures. By virtue of its aminopropyl groups, aminoclay is further capable of reacting along with the intercalated precursors to enrich the carbon content of the resulting carbon nitrides.
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Mitsuhiko Miyazaki, Koji Makara, Shun-ichi Ishiuchi, Masaaki Fujii
2011 Volume 40 Issue 10 Pages
1157-1158
Published: October 05, 2011
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Infrared spectra of protected amino acids,
N-benzoxycarbonyl-
L-proline and
N-benzoxycarbonyl-
L-isoleucine were measured in the gas phase from 10 to 3 µm. 4 and 3 conformers were found, respectively. The spectra in the 3 µm region reveal the carboxylic OH and amide NH bonds do not participate in hydrogen bonding with neighboring amide groups despite the highest acidity in the molecule. The spectra in the 10–5 µm region imply the main chain structure is the same among the conformers.
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Sadao Araki, Hiroyuki Yano, Shunsuke Tanaka, Yoshikazu Miyake
2011 Volume 40 Issue 10 Pages
1159-1160
Published: October 05, 2011
Released on J-STAGE: September 28, 2011
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Improving the hydrogen permeation flux, while maintaining high hydrogen selectivity, is important for reducing membrane areas and enhancing membrane reactor (MR) performance. We have attempted to enhance the hydrogen permeation through the addition of nickel, which will improve both hydrogen adsorption and pore size control. The silica layer was deposited with high selectivity, using an extended counter-diffusion CVD method.
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Kazuya Nakata, Baoshun Liu, Yuri Goto, Tsuyoshi Ochiai, Munetoshi Saka ...
2011 Volume 40 Issue 10 Pages
1161-1162
Published: October 05, 2011
Released on J-STAGE: September 28, 2011
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TiO
2–WO
3 composite fibers were prepared by electrospinning. The fibers have an average diameter of 1.0 µm. The XRD pattern of the TiO
2–WO
3 composite fibers indicates the presence of anatase and rutile phases of TiO
2 and an orthorhombic phase of WO
3. The photocatalytic degradation of acetaldehyde under visible light was achieved with the TiO
2–WO
3 composite fibers.
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Sabir H. Mashraqui, Mukesh A. Chandiramani, Sushil S. Ghorpade, Caroli ...
2011 Volume 40 Issue 10 Pages
1163-1164
Published: October 05, 2011
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Supplementary material
A new chelating diaryloxadiazole probe, oxazid displayed emission red shift and 16-fold emission enhancement upon binding with Zn
2+ in buffered condition, while competing Cd
2+, Ca
2+, Mg
2+, and several potentially quenching metal ions posed no significant optical interferences. Experimental evidences indicated 1:1 complexation, and the computational work revealed formation of a stable octahedral geometry.
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Yuto Hashimoto, Takumi Ueyama, Tatsuya Fukutani, Koji Hirano, Tetsuya ...
2011 Volume 40 Issue 10 Pages
1165-1166
Published: October 05, 2011
Released on J-STAGE: September 28, 2011
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Supplementary material
Direct alkenylation of 1-phenylpyrazoles with alkenes such as acrylates accompanied by regioselective C–H bond cleavage proceeds efficiently under ruthenium catalysis in the presence of a copper oxidant. The procedure is also applicable to 2-phenylbenzothiazole and benzanilide.
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Tadahiko Nogami, Makoto Imaji, Kaoru Uemura, Yoshiaki Tanabe, Yuichiro ...
2011 Volume 40 Issue 10 Pages
1167-1169
Published: October 05, 2011
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Supplementary material
A series of cyanamido-bridged di- and tetraruthenium complexes with η
6-C
6Me
6 ligands have been synthesized, and their interconversion reactions have been investigated. Facile interconversion between the μ
2-κ
N,κ
N and μ
2-κ
N,κ
N′ coordination modes of NCNH ligands at a dimetallic core has been observed for the first time.
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Toshihiko Tanaka, Miei Satoh, Masamitsu Ishitobi, Tetsuya Aoyama, Shin ...
2011 Volume 40 Issue 10 Pages
1170-1172
Published: October 05, 2011
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Supplementary material
Highly anisotropic thin molecular films have been successfully prepared by depositing a bisazomethine dye under vacuum through evaporation on friction-transferred (FT) poly(tetrafluoroethylene) (PTFE) layers. The layers induce the high orientational degrees showing high dichroic ratios over 20 in their polarized UV–visible absorption spectra. Moreover, by modifying FT layers with the further PTFE evaporated and rubbing, the ratios are improved to remarkable values up to 44.
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Tingting Wang, Zhicheng Ju, Changhui Sun, Yitai Qian
2011 Volume 40 Issue 10 Pages
1173-1175
Published: October 05, 2011
Released on J-STAGE: October 01, 2011
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Crystalline hexagonal boron nitride (h-BN) hexagonal nanoplates were synthesized by the reaction of B
2O
3, NH
4F, and metallic Na at 700 °C. The edge sizes of the hexagonal nanoplates are 400 nm, and the average thickness is 100 nm. As the reaction temperature was set at 500 °C, rhombohedral boron nitride (r-BN) triangular nanoplates nearly 200 nm across and about 20 nm thick were obtained. TGA analysis results reveal that thermal stability of h-BN hexagonal nanoplates was better than that of r-BN triangular nanoplates in air.
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Anil K. Saikia, Somasekhar Bondalapati, Kiran Indukuri, Paramartha Gog ...
2011 Volume 40 Issue 10 Pages
1176-1178
Published: October 05, 2011
Released on J-STAGE: October 01, 2011
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Supplementary material
Trimethylsilyl triflate and tetrabutylammonium iodide (TBAI) effectively mediate the Prins cyclization of homoallylic alcohols and aldehydes to give 4-iodotetrahydropyrans with axial selectivity and good yields.
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Hajime Hirao
2011 Volume 40 Issue 10 Pages
1179-1181
Published: October 05, 2011
Released on J-STAGE: October 01, 2011
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Supplementary material
The effect of the protein environment on the short-lived compound I state of cytochrome P450cam was analyzed in detail by decomposing the ONIOM(B3LYP:AMBER) interaction energy between the active site and the surrounding protein environment into electrostatic, van der Waals (vdW), and polarization terms. The electrostatic effect was the largest in magnitude, followed by the vdW effect, and then by the polarization effect. The contributions of individual residues to the environmental effect were also evaluated.
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Nobuaki Yonekura, Ryo Shiroma
2011 Volume 40 Issue 10 Pages
1182-1183
Published: October 05, 2011
Released on J-STAGE: October 01, 2011
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We report the unidirectional transport of ionic dyes by new soft matter ratchets, which are made of melamine foam with non-centrosymmetric triangular shapes and driven by an AC electric field. The time evolution of the distributions of the ions in the ratchet has been analyzed to reveal that the ratchets can transport the ions preferentially in one direction with an asymmetric transport ratio of more than 7.
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Kyung Ho Kim, Takashi Ueta, Takashi Okubo, Shinya Hayami, Haruho Anma, ...
2011 Volume 40 Issue 10 Pages
1184-1186
Published: October 05, 2011
Released on J-STAGE: October 01, 2011
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Supplementary material
A novel mixed-valence Cu(I)–Cu(II) coordination polymer with an infinite one-dimensional (1-D) structure, [Cu
I4Cu
III
4(Mor-dtc)
2(CH
3CN)
2]
n (Mor-dtc
−: morpholine dithiocarbamate), was prepared and structurally characterized by X-ray diffraction. This complex consists of a mononuclear copper(II) unit of [Cu
II(Mor-dtc)
2] and a tetranuclear Cu(I) unit of [Cu
4I
4(CH
3CN)
2]. It also shows semiconductive behaviors with a relatively small activation energy, which was revealed by impedance analysis.
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Yoshio Takahashi, Mika Sakamitsu, Masato Tanaka
2011 Volume 40 Issue 10 Pages
1187-1188
Published: October 05, 2011
Released on J-STAGE: October 01, 2011
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Supplementary material
Diffusion coefficients (
D) of arsenite and arsenate at various pH, or degrees of dissociation, were reported by diffusion cell, some values of which are newly reported in this letter. Systematic decrease of
D depending on the dissociation of arsenite and arsenate shows that
D is closely related to the size of the hydrated ions.
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Kohei Fuchibe, Yuta Koseki, Hisashi Sasagawa, Junji Ichikawa
2011 Volume 40 Issue 10 Pages
1189-1191
Published: October 05, 2011
Released on J-STAGE: October 01, 2011
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Supplementary material
NHC-catalyzed generation of difluorocarbene from trimethylsilyl 2,2-difluoro-2-(fluorosulfonyl)acetate (TFDA) enables the synthesis of enol difluoromethyl ethers starting from cyclohexenones and tetralones. The resultant enol difluoromethyl ethers were successively dehydrogenated with DDQ to furnish aryl difluoromethyl ethers in good to high yield.
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Yoshifumi Aoki, Yuta Mochizuki, Tomohiro Yoshinari, Ken Ohmori, Keisuk ...
2011 Volume 40 Issue 10 Pages
1192-1194
Published: October 05, 2011
Released on J-STAGE: October 01, 2011
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Supplementary material
An effective route to multisubstituted cyclohexanes has been developed by exploiting the Diels–Alder reaction of easily available dienes within a dioxanone moiety with electron-deficient dienophiles.
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