-
Zhibin Tian, Qi Feng, Naoto Sumida, Yoji Makita, Kenta Ooi
2004 Volume 33 Issue 8 Pages
952-953
Published: 2004
Released on J-STAGE: June 28, 2004
JOURNAL
RESTRICTED ACCESS
Manganese oxide nanofibers with layered structure and γ-MnOOH structure have been prepared from a layered manganese oxide by using a self-assembling hydrothermal process. This process includes preparation of manganese oxide nanosheets by exfoliating the layered manganese oxide, self-assembling the nanosheets with a cationic surfactant into a nanocomposite, and transforming the nanocomposite into the nanofibers under hydrothermal conditions.
View full abstract
-
Ryu Abe, Masanobu Higashi, Zhigang Zou, Kazuhiro Sayama, Yoshimoto Abe
2004 Volume 33 Issue 8 Pages
954-955
Published: 2004
Released on J-STAGE: June 28, 2004
JOURNAL
RESTRICTED ACCESS
Titanate pyrochlores R
2Ti
2O
7 (R = Y, rare earth) were synthesized by a polymerized complex (PC) technique and used as photocatalysts for the splitting of water into H
2 and O
2. NiO
x-loaded Y
2Ti
2O
7, the first example of an active photocatalyst with a pyrochlore structure, demonstrated efficient evolution of H
2 and O
2 in a stoichiometric ratio from pure water under UV-light irradiation, whereas R
2Ti
2O
7 compounds with partly filled 4f orbitals showed quite low activity.
View full abstract
-
Hiroshi Miyoshi, Danping Chen, Tomoko Akai
2004 Volume 33 Issue 8 Pages
956-957
Published: 2004
Released on J-STAGE: June 28, 2004
JOURNAL
RESTRICTED ACCESS
Lead was removed from lead silicate glass 7.3Na
2O–6.4K
2O–3.7MgO–5.4CaO–66.4SiO
2–7.8PbO–3Al
2O
3 (mol %), used in color television CRT funnel, utilizing a subcritical hydrothermal treatment at 628 K and 24 MPa followed by acid leaching at 373 K. This process may be used to prevent disposal of lead containing waste glass wares to landfills, reduce environmental risks in future.
View full abstract
-
Wei-Liang Feng, Yong Cao, Nan Yi, Wei-Lin Dai, Kang-Nian Fan
2004 Volume 33 Issue 8 Pages
958-959
Published: 2004
Released on J-STAGE: June 28, 2004
JOURNAL
RESTRICTED ACCESS
The presence of a small amount of alkali additive in the polymer-complexed copper catalysts can lead to a remarkable increase in the reaction efficiency for the oxidative carbonylation of methanol to dimethyl carbonate.
View full abstract
-
Biswanath Das, Joydeep Banerjee
2004 Volume 33 Issue 8 Pages
960-961
Published: 2004
Released on J-STAGE: June 28, 2004
JOURNAL
RESTRICTED ACCESS
The single step synthesis of 4(3
H)-quinazolinones has been carried out efficiently by coupling of the three components, anthranilic acid, ortho esters, and amines in the presence of silica-supported sodium hydrogen sulfate (NaHSO
4·SiO
2) or Amberlyst-15 as a heterogeneous catalyst. The reaction occurred within a few minutes under solvent free conditions to afford the products in excellent yields. One of the catalysts, Amberlyst-15 can be recovered and recycled.
View full abstract
-
Hirotaka Kagoshima, Naoshi Takahashi
2004 Volume 33 Issue 8 Pages
962-963
Published: 2004
Released on J-STAGE: June 28, 2004
JOURNAL
RESTRICTED ACCESS
In the presence of copper(II) triflate, the addition reaction of α-sulfurated alkylstannanes to imines proceeded smoothly to give the corresponding vicinal-amino sulfides in good yields.
View full abstract
-
Emiko Fujiwara, Akiko Kobayashi, Hideki Fujiwara, Toyonari Sugimoto, H ...
2004 Volume 33 Issue 8 Pages
964-965
Published: 2004
Released on J-STAGE: June 28, 2004
JOURNAL
RESTRICTED ACCESS
We synthesized π-extended donors for magnetic conductors that contain a stable 2,2,5,5-tetramethylpyrrolin-1-yloxyl radical, and cleared their structure and physical properties. We also discussed the conducting and magnetic properties of cation radical salts of the synthesized donor.
View full abstract
-
Hajime Maeda, Akemi Horiuchi, Norihiro Koshio, Kazuhiko Mizuno
2004 Volume 33 Issue 8 Pages
966-967
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
Photocycloaddition of cholesteryl cinnamate with methyl 9-phenanthrenecarboxylate in benzene at ambient temperature gave a (2π + 2π) photocycloadduct in 8% diastereomeric excess (de). When the reaction was carried out in neat conditions at 150–170 °C, the major product was reversed to another diastereomer, in which de was given in 14%.
View full abstract
-
Yoshiaki Oohashi, Kentarou Fukumoto, Teruaki Mukaiyama
2004 Volume 33 Issue 8 Pages
968-969
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
Reaction of carboxylic acids with alcohols by using an equimolar amount of di-2-thienyl carbonate (2-DTC) in the presence of a catalytic amount of 4-(dimethylamino)pyridine (DMAP) followed by addition of an equimolar amount of iodine proceeded smoothly to afford the corresponding esters and 2(5
H)-thiophenone in good to high yields.
View full abstract
-
Minoru Mitsumi, Shunsuke Umebayashi, Yoshiki Ozawa, Makoto Tadokoro, H ...
2004 Volume 33 Issue 8 Pages
970-971
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
Redox reactions of dodecacarbonyltetrarhodium(0), Rh
4(CO)
12, with 9,10-phenanthraquinone derivatives gave novel one-dimensional rhodium(I)–semiquinonato complexes. Two typical linear chain structures with direct Rh–Rh contacts were determined by X-ray crystal structure analyses of the compounds.
View full abstract
-
Motohiro Sonoda, Yu Sakai, Takashi Yoshimura, Yoshito Tobe, Kenji Kama ...
2004 Volume 33 Issue 8 Pages
972-973
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
A convenient synthesis of tetrabenzopentakisdehydro[12]annuleno[12]annulene
2c with substantial solubility was achieved by double cyclization of tetrabromotolan
3 with
o-diethynylbenzene
4.
View full abstract
-
Jun Ren, Qiaochun Wang, Dahui Qu, Xueli Zhao, He Tian
2004 Volume 33 Issue 8 Pages
974-975
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
Supplementary material
Two chemosensors based on perylene derivatives linked by urea were synthesized, and they show red color fluorescence and response to fluoride anion selectively with fluorescence quenching. The binding constants of these sensory systems to fluoride anion were high up to ≈10
5 M
−1.
View full abstract
-
Takanori Sugimoto, Minoru Ueda
2004 Volume 33 Issue 8 Pages
976-977
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
Potassium isolespedezate (
1) is a leaf-opening factor controlling the nyctinastic leaf-movement of leguminous plants. We carried out bioorganic studies on nyctinasty by using synthetic probes designed on the structure of
1 and its galactose analog (
2). However,
1 was synthesized via an indirect route because of the difficulty of direct formation of the enol-glycosidic linkage. More efficiency is desired for the preparation of
1 and
2 which are necessary for the synthesis of probe compounds. In this paper, we report the biomimetic synthesis of
1 containing direct formation of an enol-glucosidic linkage. This efficient route makes it possible to prepare
1 and
2 in large quantity.
View full abstract
-
Seiji Sakamoto, Ippei Okano, Kazuaki Kudo
2004 Volume 33 Issue 8 Pages
978-979
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
We constructed a resin-bound peptide library in which the peptide was designed to take an α-helix structure, and
p-boronobenzoic acid was conjugated on the ε-amino group of the Lys side-chain placed at the middle of the helix. Screening this library allowed selection of a peptide that can bind flavin adenine dinucleotide with high affinity and selectivity.
View full abstract
-
Masaru Watanabe, Seigou Kawaguchi, Katsutoshi Nagai
2004 Volume 33 Issue 8 Pages
980-981
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
Monodispersed cationic polymer particles bearing quaternary ammonium groups on their surfaces were well self-organized through hydrophobic interaction on hydrophobically modified glass plates in aqueous system. We could fabricate the particle monolayer of close-packed structure with a relatively regular interval by tuning hydrophilic–hydrophobic balance of particles and temperature.
View full abstract
-
Xia-Yan Wang, Hui Zhong, Jin-Hua Yuan, Dong Sheng, Xiang Ma, Jing-Juan ...
2004 Volume 33 Issue 8 Pages
982-983
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
This letter presents a novel, simple approach for direct electrochemical fabrication of metallic (Au or Pt) nanopillar array on gold electrode surface, employing cysteamine as a molecular anchor and anodic aluminum oxide as template without any sputtered metal as electrical conductor. The nanopillar arrays were grew directly on the electrode surface, and the prepared nanopillar array electrodes were used directly and easily to the electrochemical application.
View full abstract
-
Nabeen K. Shrestha, Genta Kobayashi, Tetsuo Saji
2004 Volume 33 Issue 8 Pages
984-985
Published: 2004
Released on J-STAGE: August 05, 2004
JOURNAL
RESTRICTED ACCESS
Electrodeposit of nickel with high content of the surface-modified silica particles by a silane-coupling agent was prepared from the Watts nickel bath containing the silica particles dispersed with the aid of a surfactant containing an azobenzene moiety. This composite coating plated under optimized conditions exhibited the ultra high water repellency property with the contact angle of 156°.
View full abstract
-
Takeshi Yamaguchi, Masatoshi Yanagida, Ryuzi Katoh, Hideki Sugihara, H ...
2004 Volume 33 Issue 8 Pages
986-987
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
The ethylenediamine Ru(II) tricarboxyterpyridine complex [Ru(tctpy)(en)(NCS)]Cl (
1) was newly synthesized, and its photophysical and photovoltaic properties were characterized. Solar cells based on nanocrystalline TiO
2 films sensitized with
1 exhibited efficient sensitization over the visible and near-infrared region. These solar cells generated a large short-circuit photocurrent of 17.7 mA cm
−2 and an open-circuit potential of 0.68 V under simulated AM 1.5 solar irradiation (100 mW cm
−2) with a solar energy conversion efficiency of 8.5%.
View full abstract
-
Wei-Wei Wang, Ying-Jie Zhu
2004 Volume 33 Issue 8 Pages
988-989
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
Single-crystalline zinc oxide (ZnO) with needle-like and flower-like morphologies has been successfully synthesized by decomposition of Zn(OH)
42− in aqueous solution at 90 °C. The reaction temperature, reaction time, and zinc source are important factors in determining the phase and morphology of ZnO. When using zinc acetate as the zinc source at 90 °C for 90 min in an oil bath, ZnO with the needle-like morphology was obtained. Whereas using zinc nitrate as the zinc source, ZnO with flower-like morphology was produced.
View full abstract
-
Kazuyoshi Uematsu, Kenji Toda, Mineo Sato
2004 Volume 33 Issue 8 Pages
990-991
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
YVO
4:Eu
3+ and Mg
2SnO
4:Mn
2+ phosphors were prepared using a domestic microwave oven. The temperature of the raw materials irradiated with a microwave was rose up to 1111–1716 K within 150 s, followed by a sharp drop in the temperature in spite of irradiating the microwave continuously. A low dielectric loss factor of the reaction products caused the sharp drop in temperature as soon as the reaction was completed.
View full abstract
-
Yoshitaka Aoki, Hiroki Habazaki, Hidetaka Konno
2004 Volume 33 Issue 8 Pages
992-993
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
The novel sensing property of neodymium (III) chromate(V), NdCrO
4, to methanol has been demonstrated. The electrical response of this compound did not rely on the surface potential change by the interaction with methanol gas, but was instead due to the redox interconversion of zircon-type NdCr
VO
4 to KDP-type NdH
2Cr
IIIO
4. The NdCrO
4 film prepared on alumina substrates with 2.5-μm thickness could respond to methanol of ppm order concentration with an apparent increase in electrical resistance.
View full abstract
-
Osamu Hayashida, Jun-ichi Ito, Shinji Matsumoto, Itaru Hamachi
2004 Volume 33 Issue 8 Pages
994-995
Published: 2004
Released on J-STAGE: July 05, 2004
JOURNAL
RESTRICTED ACCESS
Self-folding resorcinarenes bearing optically active urea moieties showed unique circular dichroism (CD) phenomena on the macrocyclic skeleton, which were caused by their chiral urea termini through intramolecular hydrogen bonding interactions in chloroform. These characteristic CD bands were disappeared upon complexation with anions such as chloride and bromide.
View full abstract
-
Wataru Takashima, Shyam S. Pandey, Keiichi Kaneto
2004 Volume 33 Issue 8 Pages
996-997
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
Electrodeposited polypyrrole films in Aerosol OT emulsion media (PPyAOT) have been investigated in terms of their electrochemomechanical characteristics for various tetraalkyl ammonium (TAA) chloride salts. PPyAOT film exhibited a cathodic expansive behavior during potential cycling, indicating the reversible exchange of TAA in PPyAOT. The oxidation peaks changed with the alkyl chain length while the reduction peaks were stationary. The large cathodic expansion of 4.5% was obtained in 0.2 M tetraethyl ammonium chloride solution. The unique porous morphology on PPyAOT film seems to assist the large mobility of bulky cations.
View full abstract
-
Takabumi Nagai, Tadatomi Nishikubo
2004 Volume 33 Issue 8 Pages
998-999
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
It was found that improvement in durability of NBDs against degradation during repeated cycles of photoisomerization of NBDs to QCs and thermal reversion of QCs to NBDs could be achieved by an antioxidized reagent. Hindered amine derivative was the most effective.
View full abstract
-
Kazuhiko Tsukagoshi, Tatsuya Fujii, Riichiro Nakajima
2004 Volume 33 Issue 8 Pages
1000-1001
Published: 2004
Released on J-STAGE: August 05, 2004
JOURNAL
RESTRICTED ACCESS
We achieved capillary electrophoresis with chemiluminescence detector using on-capillary detection, taking advantage of the commercially available chemiluminescence reagent (LUMICA) and its oxidant. A mixture of dansyl tryptophan and dansyl glycine as a model sample migrated in two different running buffers, both containing LUMICA and the oxidant, indicating chemiluminescence was generated by the reaction of LUMICA, the oxidant, and dansyl α-amino acids. When the α-amino acids went through the detection window on the capillary, the chemiluminescence signals were observed with the chemiluminescence detector using on-capillary detection. This new concept of on-capillary chemiluminescence detection did not require any interface device between the electrophoresis capillary and the chemiluminescence detector.
View full abstract
-
Takanori Kishida, Norifumi Fujita, Kazuki Sada, Seiji Shinkai
2004 Volume 33 Issue 8 Pages
1002-1003
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
A porphyrin which assembles into a two-dimensional sheet structure by the hydrogen-bonding interaction among the peripheral urea groups has been designed. Introduction of triethoxysilyl groups into the terminal groups has enabled us to immobilize this novel porphyrin-based cluster by sol–gel polycondensation.
View full abstract
-
Shigeru Sasaki, Kiyotoshi Kato, Yoshihiro Tanabe, Masaaki Yoshifuji
2004 Volume 33 Issue 8 Pages
1004-1005
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
[η
4-Tetrakis(arylethoxyphosphoryl)cyclobutadiene](η
5-cyclopentadienyl)cobalt(I) complexes were synthesized by reaction of bis(arylethoxyphosphoryl)acetylenes with CpCo(CO)
2 and several diastereomers were isolated. Whole molecular structure of the tetraphosphorylcyclobutadiene complex was significantly affected by relative configuration of the phosphoryl groups.
View full abstract
-
Xin-Hong Zhou, Fu-Shi Zhang, Peng Yuan, Fan Sun, Shou-Zhi Pu, Fu-Qun Z ...
2004 Volume 33 Issue 8 Pages
1006-1007
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
Dithienylperfluorocyclopentene derivatives that bear alkyl substituents connected onto the two carbon atoms of the thiophene heterocycles where, in their ring-closed form, the new C–C single bond is formed (the 2-positions of the thiophene), can exhibit photochromic ring-closing, and both photochromic and electrochromic ring-opening.
View full abstract
-
Takafumi Ichikawa, Takeshi Kodama, Shinzo Suzuki, Ryosuke Fujii, Hiroy ...
2004 Volume 33 Issue 8 Pages
1008-1009
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
We isolated a new (second) isomer of Ca@C
72. As a result of this discovery, it was confirmed that at least one of the two Ca@C
72 isomers has a C
72 cage that does not satisfy the so-called isolated pentagon rule (IPR), because C
72 has only one IPR cage structure.
View full abstract
-
Limei Wang, Dajun Chen
2004 Volume 33 Issue 8 Pages
1010-1011
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
The Ag/PMMA shell/core nanocomposites were fabricated by one-pot emulsification method. AgNO
3 are both silver source and initiator for polymerization of MMA. The polymerization took place when the Ag
+ was reduced to Ag. The microstructures of the nanocomposites were characterized by TEM, XRD, FTIR, and AFM.
View full abstract
-
Yun Shi, Fumiya Niikura, Akinori Kuzuya, Makoto Komiyama
2004 Volume 33 Issue 8 Pages
1012-1013
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
When a one-base gap was formed in substrate RNA by using two oligonucleotides, the phosphodiester linkage at the gap-site was activated and selectively hydrolyzed by ethylenediamine. This site-selective hydrolysis was further promoted by connecting two gap-forming oligonucleotides with 1,3-propanediol linker.
View full abstract
-
Tamotsu Sugimori, Jun Nojima, Tomohiro Ozawa, Makoto Handa, Kuninobu K ...
2004 Volume 33 Issue 8 Pages
1014-1015
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
Substituted magnesium(II) phthalocyanines modified with dimethylaminophenyl and trimethylaniliniumyl groups were prepared and characterized. The tetra- and octa-substituted phthalocyanines with the cationic trimethylaniliniumyl groups were soluble in water, and the octa-substituted one existed as a photoactive monomer in water.
View full abstract
-
Takashi Nakagawa, Hidehiko Fujisawa, Yuzo Nagata, Teruaki Mukaiyama
2004 Volume 33 Issue 8 Pages
1016-1017
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
Lithium acetate-catalyzed Michael reaction between trimethylsilyl enolates and α,β-unsaturated carbonyl compounds in DMF proceeded smoothly to afford the corresponding Michael-adducts in good to high yields. Hindered α,β-unsaturated ketones also behaved as an excellent Michael-acceptor in the above reaction at room temperature.
View full abstract
-
Hiroyuki Kurata, Nobuo Rikitake, Akio Okumura, Masaji Oda
2004 Volume 33 Issue 8 Pages
1018-1019
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
Bicyclo[10.10.10]dotriacontanes, the largest bicyclo[
n.
n.
n]alkanes ever known, have been first synthesized by Raney nickel reduction of trithienylmethanophanes consisiting of two tris(2-thienyl)methanes and three etheno bridges. X-ray crystallographic analysis of a crystalline derivative confirmed the structure, though disorder of included hexane molecules lowered the accuracy.
View full abstract
-
Fang Liao
2004 Volume 33 Issue 8 Pages
1020-1021
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
This work demonstrates the improved, size-controlled preparation of polyelectrolyte-protected gold nanoparticles, carried out by microwave radiation of an aqueous solution containing chloroauric acid and amine-containing polyelectrolyte.
View full abstract
-
Wataru Ogihara, Masahiro Yoshizawa, Hiroyuki Ohno
2004 Volume 33 Issue 8 Pages
1022-1023
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
Novel ionic liquids (ILs) composed of azole type cation and anion were prepared. Triazole and tetrazole were coupled with 1-ethyl-3-methylimidazolium hydroxide. Obtained tetrazole salt was liquid at room temperature showing only glass transition temperature at −89 °C. The ionic conductivity reached to 8.9 × 10
−3 S cm
−1 at room temperature reflecting low viscosity of 42.5 cP at 25 °C. This is the first report on the ILs based on only azole type ions.
View full abstract
-
Akio Ojida, Takahiro Kohira, Itaru Hamachi
2004 Volume 33 Issue 8 Pages
1024-1025
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
A novel fluorescence detection system using a chemosensor for phosphoprotein in gel electrophoresis analysis has been developed. The system employed bis-Zn(II)-dipycolylamine (Dpa)-appended anthracene as a fluorescent staining dye to carry out convenient and selective detection of phosphoproteins in SDS-PAGE.
View full abstract
-
Kiyofumi Inamoto, Mika Katsuno, Takashi Yoshino, Ikue Suzuki, Kou Hiro ...
2004 Volume 33 Issue 8 Pages
1026-1027
Published: 2004
Released on J-STAGE: July 12, 2004
JOURNAL
RESTRICTED ACCESS
The efficient method for the preparation of 3-substituted indazoles was developed using the palladium catalyzed intramolecular amination reaction of 2-bromophenyl hydrazone derivatives. Good functional group compatibility was observed under mild reaction conditions and various 3-substituted indazoles were obtained in moderate to excellent yield.
View full abstract
-
Tomohiro Agou, Junji Kobayashi, Takayuki Kawashima
2004 Volume 33 Issue 8 Pages
1028-1029
Published: 2004
Released on J-STAGE: July 19, 2004
JOURNAL
RESTRICTED ACCESS
The low σ-donating ability of 9-phosphatriptycene
1 was revealed by cyclic voltammetry and theoretical calculations. The tungsten complex of
1 was synthesized and the IR and NMR spectroscopic data of the complex also suggested the low σ-donating ability of
1.
1 was shown to be effective as a ligand in the palladium-catalyzed reactions, the Stille coupling and the Heck reaction.
View full abstract
-
Makoto Ogawa, Fumihiro Saito
2004 Volume 33 Issue 8 Pages
1030-1031
Published: 2004
Released on J-STAGE: August 05, 2004
JOURNAL
RESTRICTED ACCESS
Magnesium–aluminum layered double hydroxide containing polysulfide anions was prepared by a hydrothermal reaction from magnesium and aluminum hydroxides. Thioacetamide was used as the sulfide source. The product exhibits light green color corresponding to the S
2− and S
3− ions and turns to colorless when the sample was stored in air for several days or heat treated in air at 120 °C. The color change showed that the occluded polysulfide anions were oxidized to sulfate anion by atmospheric oxygen.
View full abstract
-
Terunobu Saitoh, Naohisa Jimbo, Junji Ichikawa
2004 Volume 33 Issue 8 Pages
1032-1033
Published: 2004
Released on J-STAGE: July 19, 2004
JOURNAL
RESTRICTED ACCESS
Ketene dithioacetals readily reacted with aldehydes in the presence of a Lewis acid such as BF
3·OEt
2 or TMSOTf to generate the cationic adducts, which in turn reacted with NaAlH
2(OCH
2CH
2OCH
3)
2, leading to the corresponding β-hydroxy dithioacetals, masked cross-aldols between aldehydes. Each diastereomer was selectively obtained by choosing the appropriate Lewis acid and substituents on the sulfur atoms of the ketene dithioacetals.
View full abstract
-
Takahito Oyamada, Hiroki Yoshizaki, Hiroyuki Sasabe, Chihaya Adachi
2004 Volume 33 Issue 8 Pages
1034-1035
Published: 2004
Released on J-STAGE: August 05, 2004
JOURNAL
RESTRICTED ACCESS
We demonstrated that triazine (TRZ) derivatives possessing metal coordination sites in their structures showed excellent electron transport and injection characteristics in transparent organic light emitting diodes (TOLEDs). High luminescence efficiency with low driving voltage was observed with a TRZ/ITO cathode configuration (ITO: indium-tin-oxide), suggesting that the TRZ layer can efficiently accept electrons from the metal-oxide cathode layer, and inject electrons into an adjacent organic layer.
View full abstract
-
Xiangfeng Zhang, Zhaoyin Wen, Zuxiang Lin, Zhonghua Gu, Xiaohe Xu
2004 Volume 33 Issue 8 Pages
1036-1037
Published: 2004
Released on J-STAGE: July 19, 2004
JOURNAL
RESTRICTED ACCESS
A precursor for K–β-Al
2O
3 powder has been synthesized by hydrothermal multicomponent coprecipitation method. The precursor for the synthesis was composed of the solid solution of K
xNH
4(1−x)Al(OH)
2CO
3(
x = 0.1885). The effect of calcination temperature on the formation of K–β-Al
2O
3 phase was investigated. It is the first attempt to prepare K–β-Al
2O
3 powder by a kind of low-cost wet chemical process.
View full abstract
-
R. Murugan, B. S. R. Reddy
2004 Volume 33 Issue 8 Pages
1038-1039
Published: 2004
Released on J-STAGE: July 19, 2004
JOURNAL
RESTRICTED ACCESS
Bis-tetrabutylammonium dichromate (BTBAD) has been found to be an efficient and new reagent for the conversion of oximes to the corresponding carbonyl compounds. The reaction was performed under microwave irradiation and gave excellent yields. It also facilitates the de-protection of acetals and ketals.
View full abstract
-
Teruoki Tago, Mieko Nishi, Yousuke Kouno, Takao Masuda
2004 Volume 33 Issue 8 Pages
1040-1041
Published: 2004
Released on J-STAGE: July 19, 2004
JOURNAL
RESTRICTED ACCESS
Monodispersed silicalite nanocrystals with a diameter of 80–150 nm were successfully prepared in water–surfactant–oil solution. It was found that the ionicity of the surfactants used in preparation affected the crystallinity and structure of the silicalite, and that silicalite nanocrystals could be obtained when using a nonionic surfactant. Furthermore, silicalite nanocrystals with a diameter of approximately 80 nm could be obtained in even a high concentration region of Si source.
View full abstract
-
Kohshin Takahashi, Kaname Seto, Takahiro Yamaguchi, Jun-ichi Nakamura, ...
2004 Volume 33 Issue 8 Pages
1042-1043
Published: 2004
Released on J-STAGE: July 19, 2004
JOURNAL
RESTRICTED ACCESS
When an electron acceptor, [2-[2-[4-(dimethylamino)phenyl]ethenyl]-6-methyl-4H-pyran-4-ylidene]propanedinitrile (DCM) was blended into poly[2-methoxy-5-(2′-ethylenehexyloxy)-1,4-phenylenevinylene] (MEH-PPV) in a TiO
2/MEH-PPV/Au sandwich-type solar cell, the cell performance was remarkably enhanced, resulting in 0.47% of energy conversion yield under the irradiation of AM 1.5–100 mW/cm
2.
View full abstract
-
M. Mohan Rao, M. Jayalakshmi, R. Sudarshan Reddy
2004 Volume 33 Issue 8 Pages
1044-1045
Published: 2004
Released on J-STAGE: July 19, 2004
JOURNAL
RESTRICTED ACCESS
SnS nanorods and nanoparticles were synthesized by thiourea hydrolysis in an autoclave at 180 °C within a time window of 2 and 8 h, respectively. In the absence of added structure-directing agent, the nanorods formation was attributed to templating characteristic of ammonium ion produced in situ during hydrolysis.
View full abstract
-
Noriyoshi Kon, Nobuhiko Iki, Takashi Kajiwara, Tasuku Ito, Sotaro Miya ...
2004 Volume 33 Issue 8 Pages
1046-1047
Published: 2004
Released on J-STAGE: July 19, 2004
JOURNAL
RESTRICTED ACCESS
X-ray diffraction revealed a single crystal of a Cu(II) complex of
p-
tert-butyldithiacalix[4]arene
5 (H
4L) to be [Cu
3(H
L)(H
2L)(AcO)], in which three Cu(II) ions are sandwiched by two calixarene ligands including different guest molecules, CHCl
3 and hexane, in each cone-shaped cavity.
View full abstract
-
Shan Jiang, Young Kyu Hwang, Sung Hwa Jhung, Jong-San Chang, Jin-Soo H ...
2004 Volume 33 Issue 8 Pages
1048-1049
Published: 2004
Released on J-STAGE: July 19, 2004
JOURNAL
RESTRICTED ACCESS
Zeolite SUZ-4 is found to be a very selective and stable catalyst for producing dimethyl ether in methanol dehydration because the formed dimethyl ether is hardly converted to hydrocarbons, different from ZSM-5 zeolite.
View full abstract
