-
Tomohiro Nishikawa, Yuji Shinohara, Tsuyoshi Nakajima, Masaki Fujita, ...
1999 Volume 28 Issue 11 Pages
1133-1134
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
DV-X
α calculations indicated the possibility of shifting the absorption edge of titania to the sunlight region by isomorphic substituting of a transition metal cation for a titanium ion. Among the cations addressed here, Ni
3+ and V
5+ reduced the band gap most effectively. The efficiency of the reduction by the substituting cation increased as the radius of the cation decreased.
View full abstract
-
Keita Ikeue, Hiromi Yamashita, Masakazu Anpo
1999 Volume 28 Issue 11 Pages
1135-1136
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Highly dispersed titanium oxide catalysts have been prepared within the mesoporous cavities of the FSM-16 zeolite (Ti-oxide/FSM-16 catalyst) by a CVD method and utilized for the photocatalytic reduction of CO
2 with H
2O to produce CH
4 and CH
3OH at 328 K. These Ti-oxide/FSM-16 photocatalysts exhibited high reactivity and selectivity for the formation of CH
3OH, its reactivity and selectivity showing a good relationship with the photoluminescence yield of the catalyst which can be attributed to the radiative decay from the charge transfer excited state of the tetrahedral coordinated titanium oxides.
View full abstract
-
Yoshio Uemichi, Toshihiro Suzuki
1999 Volume 28 Issue 11 Pages
1137-1138
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A fixed-bed flow reactor, in which melted polyethylene came into contact with H-gallosilicate catalyst, was highly effective in converting the polymer to aromatic hydrocarbons. The yield of aromatics was much lower when the degradation was performed by heating a mixture of the polymer and the catalyst in a batch reactor.
View full abstract
-
Kenji Naganuma, Takayuki Kawashima, Renji Okazaki
1999 Volume 28 Issue 11 Pages
1139-1140
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Thermolyses of pentacoordinate 1,2-oxasiletanides with or without a neopentyl group at the 3-position in the presence of a proton source afforded the corresponding olefin and/or alcohol, indicating that they are the intermediates of both the Peterson reaction and homo-Brook rearrangement which are two possible modes in the reaction of β-hydroxyalkylsilanes with bases.
View full abstract
-
Rathinam J. Mahalingam, Sushanta K. Badamali, Parsuraman Selvam
1999 Volume 28 Issue 11 Pages
1141-1142
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
The catalytic performance of mesoporous chromium containing MCM-41 molecular sieves was investigated for the oxidation of phenols. The substrate conversion and the product selectivity are remarkably enhanced by ammonium acetate, acetylacetonate treatments of this unique catalyst. In particular, phenol shows excellent results compare to the TS-1 catalyst.
View full abstract
-
Takashi Sugimura, Harumi Kohno, Shinya Nagano, Futoshi Nishida, Akira ...
1999 Volume 28 Issue 11 Pages
1143-1144
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
The thermal [1,5] hydrogen migration of 7-alkoxycarbonyltropilidene was found to be accelerated by conformational regulation at the carbonyl group, which was mainly affected to the activation energy. Methyl substitutions on the 3- and 5-positions further increased the migration rate.
View full abstract
-
Isamu Shiina, Jun Shibata, Yumiko Imai, Ryoutarou Ibuka, Hidehiko Fuji ...
1999 Volume 28 Issue 11 Pages
1145-1146
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
An effective method for the preparation of 8-membered ring enone
1 in sufficient quantities was developed. First, optically active trialkoxyaldehyde
3 was prepared by diastereoselective dihydroxylation of olefin
7 derived from
D-pantolactone. Secondly, 8-chloro-7-oxoaldehydes
20α,β were newly synthesized by the following reactions: namely, MgBr
2·OEt
2-mediated diastereoselective aldol reaction of the aldehyde
3 with ketene (trimethylsilyl) acetal
15, direct 1,1-dichloroethylation of ester
17 with 1,1-dichloroethyllithium, and partial dehalogenation of the resulting α,α-dichloroethyl ketone
18 with
nBu
3SnH. Lastly, the chiral 8-chloro-7-oxoaldehydes
20α,β were converted to the 8-membered ring enone
1 by SmI
2-mediated aldol cyclization.
View full abstract
-
Narumi Ohta, Seiichiro Nakabayashi, Akira Fujishima
1999 Volume 28 Issue 11 Pages
1147-1148
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
On the heavily doped diamond electrode, the reactivity for the copper deposition was changed depending on an electrochemical hysteresis of the surface. On the electrode, which underwent hydrogen or oxygen evolution, though the reduction of Cu
2+ proceeded on both, the reduced atom was trapped only on the surface on which the hydrogen was evolved in advance. The time course of this surface transition was investigated.
View full abstract
-
Fumiaki Ito, Hiroyuki Nishide, Eishun Tsuchida
1999 Volume 28 Issue 11 Pages
1149-1150
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Poly(3,4-azopyridylene) was prepared and complexed with picket-fence cobaltporphyrin; the polymer complex displayed both the selective and reversible oxygen-binding and the electroconductivity of 10
−5 S cm
−1.
View full abstract
-
Yayoi Yano, Kazuyuki Hino, Risa Nakata, Hiroshi Sekiya, Yonezo Maeda
1999 Volume 28 Issue 11 Pages
1151-1152
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
In this paper the intramolecular/intermolecular excimer formations of [Fe
2(bpmp)(1-pyace)
2](BF
4)
2, [ZnFe(bpmp)(1-pyace)
2](ClO
4)
2 and [Zn
2(bpmp)(1-pyace)
2]ClO
4 which contain 1-pyreneacetic acid as a chromophore are reported. The fluorescent properties of the ZnZn complex offer the intramolecular dimers of the two chromophores in addition to intermolecular dimers due to the intermolecular stacking. The ZnFe and FeFe complexes are under the strong influence of quenching and show weak intramolecular/intermolecular excimer formation in the concentration more than 10
−4 M. The emission intensities and intensity ratios (I
E/I
M) of the fluorescence are dependent on the metal ions.
View full abstract
-
Takahiro Hirotsu, Akinari Sonoda, Yoji Makita, Hirofumi Kanoh, Norio T ...
1999 Volume 28 Issue 11 Pages
1153-1154
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
10B is more fractionated to B(OH)L {H
2L: a ligand having a bis(2-hydroxyalkyl)amino group (alkyl: ethyl and propyl)} with a tetrahedral coordination mode than to B(OH)
3 with a planar triangular coordination mode in aqueous solutions, exhibiting an isotope separation factor of 1.027 at 25 °C, which is greater than the upper limit of anion exchangers.
View full abstract
-
Takashi Endo, Ryouichi Kitagawa, Farao Zhang, Takahiro Hirotsu, Jun Ho ...
1999 Volume 28 Issue 11 Pages
1155-1156
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A new type of cellulose composite was mechano-chemically prepared by ball-milling mixtures of cellulose and poly(ethylene glycol) (PEG). The composites are probably formed by insertion of PEG molecules among cellulose crystalline molecular-chains, and accordingly the compatibilization of cellulose and PEG through the formation of hydrogen-bonds, exhibiting a different mode of orientation of cellulose from that of similar blends from solution systems.
View full abstract
-
Teruaki Mukaiyama, Akifumi Kagayama, Koji Igarashi, Isamu Shiina
1999 Volume 28 Issue 11 Pages
1157-1158
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Highly diastereoselective aldol reaction of α-bromo ketones with aliphatic aldehydes was successfully carried out by using titanium(II) chloride and copper in dichloromethane at low temperature. Similarly, Reformatsky-type reaction of α-bromo thioester with aliphatic aldehydes was promoted under mild conditions to afford β-hydroxy thioesters in good to moderate yields.
View full abstract
-
Hwan-Kyeong Jeong, Hirotsugu Kikuchi, Tisato Kajiyama
1999 Volume 28 Issue 11 Pages
1159-1160
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A (polymer/liquid crystal: LC) composite film with a high electric charge holding was prepared by a solvent-induced phase separation method. The (polydiisopropyl fumarate (Pdi-iPF)/TL205 (LC)) composite film sandwiched between two transparent electrodes exhibited highly stable electric charge holding over several hundreds seconds after the electric circuit connecting between the electrodes was opened. Reversible light transmission-light scattering switching upon an open circuit after the application of a pulse electric field and a short one, respectively, was achieved for the (Pdi-iPF/TL205) composite film.
View full abstract
-
Shuji Tomoda, Daisuke Kaneno, Takatoshi Senju
1999 Volume 28 Issue 11 Pages
1161-1162
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
The exterior frontier orbital extension model (the EFOE Model) strongly suggested that reversal of π-facial diastereoselection in nucleophilic additions of 1,3-diheteran-5-ones (heteroatom = O or S) may originate from the unique ground-state conformation and the π-facial difference in the LUMO extension around the carbonyl carbon rather than from transition state effects.
View full abstract
-
Peng Li, Jie Cheng Xu
1999 Volume 28 Issue 11 Pages
1163-1164
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
HOBt-based immonium type coupling reagent, 5-(1
H-benzotriazol-1-yloxy)-3,4-dihydro-1-methyl 2
H-pyrrolium hexachloroantimonate (BDMP) has been designed, synthesized and utilized to synthesize oligopeptides and biologically active peptides both in solution and solid phase with good yield, low racemization and fast reaction rate.
View full abstract
-
Hiroshi Hachisako, Hiroki Nakayama, Hirotaka Ihara
1999 Volume 28 Issue 11 Pages
1165-1166
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Critical aggregation concentrations of organic gel-forming lipids in nonpolar organic media such as benzene were found to be determined by measuring the first-order rate constants of merocyanine-to-spiropyran thermal isomerizations for spiropyrans added as probes.
View full abstract
-
Bunji Uno, Noriko Okumura
1999 Volume 28 Issue 11 Pages
1167-1168
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
The structural and spectral characteristics of the tetracyanoethylene dianion (TCNE
2−) have been investigated. The two-electron addition to the untibonding LUMO of TCNE causes the easy rotation around the C=C bond characterized by the formal single bond. The spectral measurements and MO calculations gives results that TCNE
2− preferentially adopts the
D2d and
D2h structures in CH
3CN and CH
2Cl
2, respectively.
View full abstract
-
Sihai Chen, Keisaku Kimura
1999 Volume 28 Issue 11 Pages
1169-1170
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Stable carboxylate-functionalized silver nanoparticles (1.4 - 5.7 nm in diameter) which can be separated as pure water-redispersible powder are synthesized by the reduction of silver nitrate with sodium borohydride in the presence of mercaptosuccinic acid (MSA) in methanol. The results show that the particle sizes can be controlled through varying the initial molar ratio of MSA to AgNO
3. MSA exists in the form of sodium carboxylate and adsorbs H
2O molecules on the particle surface.
View full abstract
-
Isamu Moriguchi, Akemi Ozono, Kumiko Mikuriya, Yasutake Teraoka, Shuic ...
1999 Volume 28 Issue 11 Pages
1171-1172
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Phenol-formaldehyde polymers and surfactant assembly was structuralized into lamella and disordered mesophases depending on the surfactant/phenol molar ratio at the synthesis.
View full abstract
-
Tamotsu Takahashi, Fu-Yu Tsai, Yanzhong Li
1999 Volume 28 Issue 11 Pages
1173-1174
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Zirconacyclopentadienes prepared from 4,4′-dibromodiphenyldiynes or 1-(4′-bromophenyl)-1-alkynes reacted with dimethylacetylene dicarboxylate in the presence of CuCl afforded polyphenylene monomers which contain three benzene rings. Hydrolysis, chlorination with NCS, or allylation of the zirconacyclopentadienes gave a variety of polyphenylenedienylene monomers. Polymerization of these monomers using the system NiCl
2(PPh
3)
2 (cat.)/Zn produced the corresponding polymers.
View full abstract
-
Hiromichi Aono, Miyoko Tsuzaki, Akihiro Kawaura, Masatomi Sakamoto, En ...
1999 Volume 28 Issue 11 Pages
1175-1176
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
The heteronuclear LaMn(dhbaen)(OH)(NO
3)(H
2O)
4 complex was synthesized and perovskite-type hexagonal LaMnO
3 was obtained by its thermal decomposition at 700 °C. Particle size of the samples decomposed at 600 °C and 700 °C is ca. 20 nm and 50 nm, respectively.
View full abstract
-
Manabu Takemoto, Akira Mori, Seiji Ujiie
1999 Volume 28 Issue 11 Pages
1177-1178
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A new troponoid twin system, in which two tropone carbonyl groups direct outside, was prepared, but they were not mesogenic. The binary system between the new twins and the troponoid twins with the two tropone carbonyl groups directed inside, which had a monotropic smectic C phase, showed an induced enantiotropic smectic A phase. From the X-ray diffraction study of the binary systems, a molecular packing model perpendicular to the lamellar planes was proposed, in which the dipole moments of tropone rings were canceled.
View full abstract
-
Kiyoshi Otsuka, Takeshi Seino, Shoji Kobayashi, Sakae Takenaka
1999 Volume 28 Issue 11 Pages
1179-1180
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Active and selective Ni-based catalysts for the production of hydrogen through the decomposition of methane were looked for. The most active catalyst having the longest life time was a nickel catalyst supported on Cab-O-Sil. Approximately 1200 carbon atoms per a nickel atom deposited on the Ni(5 wt%)/Cab-O-Sil catalyst at 793 K before a complete deactivation was observed.
View full abstract
-
Haruko Takahashi, Naoko Kato, Makoto Iwashima, Kazuo Iguchi
1999 Volume 28 Issue 11 Pages
1181-1182
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A method has been developed for determining the absolute configurations of acyclic tertiary alcohols using their 2NMA [methoxy-(2-naphthyl)acetic acid] esters. The
1H NMR spectra of (
R)- and (
S)-2NMA esters of model compounds were measured, and Δδ values (δ
R-ester − δ
S-ester) were calculated. The absolute configuration for tertiary hydroxy group is determined based on the sign of Δδ values like that for secondary hydroxy group.
View full abstract
-
Mitsuo Kira, Eunsang Kwon, Chizuko Kabuto, Kenkichi Sakamoto
1999 Volume 28 Issue 11 Pages
1183-1184
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Potasium-18-crown-6 and tetraethylammonium ion salts of pentafluoro-9,10-disila-9,10-dihydroanthracene anion (
5a and
5b) have an unsymmetrical transannular 1,4-fluorine bridge in the solid states. In solution,
5a and
5b show a facile intramolecular fluorine exchange.
View full abstract
-
Seiichi Nishizawa, Kazuki Shigemori, Norio Teramae
1999 Volume 28 Issue 11 Pages
1185-1186
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A new bifunctional receptor
1 for cooperative complexation of cations and anions is synthesized on the basis of benzo-15-crown-5, functionalized with a thiourea moiety as anion binding sites. When Na
+ is bound to the crown moiety of
1, the association constants of I
−, Br
− and NO
3− in CD
3CN are significantly increased, as compared with free
1. Thermodynamic studies indicate that these large increases in complex stabilities can be ascribed primarily to the enthalpic effect.
View full abstract
-
Yukako Ohashi, Yoshiki Oogo, Mikio Nakamura
1999 Volume 28 Issue 11 Pages
1187-1188
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Formation of a stable novel adduct, [Co(III)(saloph)]
2 TCNQ(-II), has been confirmed by analysis of the
1H NMR spectra of the N,N-dimethylformamide(dmf)-acetonitrile solution of LiTCNQ and [N,N′-o-phenylenebis(salicylideneaminato)] cobalt(II), denoted as [Co(II)(saloph)]. The time-resolved spectra of the UV-vis absorption of the LiTCNQ-[Co(II)(saloph)] solutions gave information concerning the formation process of the adduct.
View full abstract
-
Hiroshi Kimura, Shintaro Sasaki, Shinobu Inukai, Makoto Takeishi
1999 Volume 28 Issue 11 Pages
1189-1190
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Chromobacterium sp. isolated from a river soil produced the poly(3-hydroxyalkanoate)s [P(3HA)s] with unsaturated groups at the terminal positions of the
β-substituents when 10-undecenoic acid (UDEA) was fed as the carbon sources.
View full abstract
-
Naoki Sakurai, Hatsumi Mori, Shoji Tanaka, Hiroshi Moriyama
1999 Volume 28 Issue 11 Pages
1191-1192
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
New cyclohexeno-fused donors, CHET-TTF
1, CHESe-TTF
2, CHST
3 and CHEO-TTF
4, have been synthesized and the prepared
1·TCNQ is electron correlated system with two-dimensional electronic structure by a tight-binding band calculation, where magnetic susceptibility is retained in Curie-like behavior down to 2 K.
View full abstract
-
Ken-ichi Sugiura, Hiroyuki Tanaka, Takuya Matsumoto, Tomoji Kawai, Yos ...
1999 Volume 28 Issue 11 Pages
1193-1194
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A porphyrin henicosamer was designed, synthesized, and structurally characterized using scanning tunnelling microscopy.
View full abstract
-
Satoru Waseda, Takuya Shimosaka, Katsumi Uchiyama, Toshiyuki Hobo
1999 Volume 28 Issue 11 Pages
1195-1196
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A novel universal detection system for capillary chip electrophoresis utilizing surface plasmon resonance (SPR) detection was developed. Nafion tube was used as a septum to draw electric current outside the flow without generating any bubble in the capillary channel. Polydimethyl siloxane as a capillary chip could easily attained this setup. We could successfully observe small change in refractive index by SPR under elctroosmotic flow.
View full abstract
-
Akihiko Kudo, Seira Nakagawa, Hideki Kato
1999 Volume 28 Issue 11 Pages
1197-1198
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
NiO-loaded ZnNb
2O
6 photocatalysts showed an activity for decomposition of pure water into H
2 and O
2 under band gap irradiation (hν > 4.0 eV). This oxide photocatalyst is a new type of a photocatalyst material from the view point of the component because it consists of d
10 and d
0 metal ions.
View full abstract
-
Babak Karimi, Ashraf Miri Ashtiani
1999 Volume 28 Issue 11 Pages
1199-1200
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Various types of structurally different carbonyl compounds in the presence of ethyl orthoformate (EtO)
3CH could be efficiently converted to their diethyl acetals by using a catalytic amount (1-3 mol%) of DDQ under mild reaction conditions.
View full abstract
-
Takamasa Sagara, Narimasa Kaba, Naotoshi Nakashima
1999 Volume 28 Issue 11 Pages
1201-1202
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Quasi-reversible two-consecutive one-electron reduction processes of hypericin (Hyp) in an aqueous medium were achieved by incorporating Hyp into a cast film of a synthetic cationic lipid, dioctadecyldimethylammonium bromide (2C
18N
+Br
−), coated on a basal-plane pyrolytic graphite (BPG) electrode. Importance of the electrostatic interaction between Hyp anions and the cationic sites in the matrix was suggested.
View full abstract
-
Takashi Yanagi, Ken Kikuchi, Hideki Takeuchi, Takehiro Ishikawa, Toshi ...
1999 Volume 28 Issue 11 Pages
1203-1204
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
The asymmetric borane reduction of prochiral ketones with catalysts prepared
in situ from aluminum triethoxide and chiral amino alcohols was examined, and the corresponding chiral alcohols were obtained in high optical purity.
View full abstract
-
Ken-ichi Aoki, Masaru Nakagawa, Kunihiro Ichimura
1999 Volume 28 Issue 11 Pages
1205-1206
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Fibrous materials were formed from an alkaline solution of an azopyridine carboxylic acid as a result of the intermolecular head-to-tail hydrogen bonding and of the suppressive effect of an alkyl side chain on the π-π stacking of the molecules.
View full abstract
-
Hideki Kato, Akihiko Kudo
1999 Volume 28 Issue 11 Pages
1207-1208
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Orthorhombic (orth.) SrTa
2O
6 powder which was hardly obtained by a solid state reaction was easily synthesized by using a strontium borate flux. The native SrTa
2O
6 powder showed photoluminescence and a photocatalytic activity for decomposition of pure water into H
2 and O
2. The photocatalytic activity was drastically increased by loading a NiO co-catalyst even without pretreatment. The optimum amount of NiO loaded was 0.10 wt%. The quantum yield of the NiO(0.10 wt%)/SrTa
2O
6 photocatalyst was 7% at least.
View full abstract
-
Masaru Nakagawa, Reiko Watase, Kunihiro Ichimura
1999 Volume 28 Issue 11 Pages
1209-1210
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A novel family of ion-paired macrocyclic amphiphiles consisting of a tetracationic cyclophane and long-chain sulfonates was developed to form stable monolayers incorporating azobenzene moieties with tailor-made photoisomerizability.
View full abstract
-
Xuhui Zhu, Xiaofeng Chen, Yong Zhang, Xiaozeng You, Weilian Tan, Wei J ...
1999 Volume 28 Issue 11 Pages
1211-1212
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Optical limiting properties of a square-planar complex C
30H
24N
6O
4S
4Cu, CuL
2 [HL =
p-nitrobenzaldehyde S-benzyl dithiocarbazate] were investigated with laser pulses of 7-ns and 35-ps duration. The measured nanosecond and picosecond limiting thresholds for CuL
2 are
ca. 1 and 1.4 J cm
−2 at 532 nm, respectively. The nanosecond limiting threshold is comparable to that of C
60.
View full abstract
-
Bulusu V. Sarada, Tata N. Rao, Donald A. Tryk, Akira Fujishima
1999 Volume 28 Issue 11 Pages
1213-1214
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
The electrochemical detection of serotonin with highly boron-doped diamond thin film electrodes was investigated by use of flow injection analysis (FIA) with amperometric detection. The voltammetric behavior of diamond indicated low background current and a low tendency to adsorb the oxidative products on the electrode surface, in comparison to the glassy carbon electrode. An experimental amperometric detection limit of 10 nM (0.2 pmol) was obtained for the FIA technique, demonstrating that diamond is a stable and sensitive electrode for serotonin determination.
View full abstract
-
Zhen Ma, Weiming Hua, Yi Tang, Zi Gao
1999 Volume 28 Issue 11 Pages
1215-1216
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
CFC-12 was decomposed completely on WO
3/TiO
2 in the presence of water vapor at 265 °C, and the selectivity to CO
2 was above 99.8%. The catalytic activity and selectivity remained steady during 120 h on stream. WO
3-modified Al
2O
3, SnO
2 and Fe
2O
3 showed less activity than WO
3/TiO
2 for the decomposition of CFC-12, but they were more active than the corresponding metal oxides, too.
View full abstract
-
Hu Yan, Naoki Toshima
1999 Volume 28 Issue 11 Pages
1217-1218
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Thermoelectric performance of polyaniline can be improved by formation of multilayered film structure. The alternatively layered films are composed of electrically insulating emeraldine base layers and electrically conducting (±)-10-camphorsulfonic acid (CSA)-doped emeraldine salt layers. The multilayered film exhibited 3.5 times higher thermoelectric power factor at ca. 300 K than a bulk film of polyaniline doped by CSA.
View full abstract
-
Rong Cao, Weiping Su, Maochun Hong, Kazuyuki Tatsumi
1999 Volume 28 Issue 11 Pages
1219-1220
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
The polymeric palladium complex of [Pd
3K
6(i-mnt)
3(H
2O)
2]
n (i-mnt = [(S
2C=C(CN)
2]
2−) has been prepared from the reaction of PdCl
2 and K
2[(S
2C=C(CN)
2] in CH
3CN. The complex has three dimensional network structure, in which two Pd, two K, four S, four N and twelve C atoms form a 24-membered ring, and the rings are further arranged in eclipsed configuration along
c axis to give a channel with H
2O as guest molecules.
View full abstract
-
Akio Kishida, Fusako Seto, Ken-ichiro Hiwatari, Takeshi Serizawa, Youi ...
1999 Volume 28 Issue 11 Pages
1221-1222
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Large scale supramolecular self-assembly was prepared by using poly(ethylene glycol) (PEG) macromonomer-g-poly(styrene) (PSt) copolymers. The ordered structure of mesh- and crater-like morphologies were obtained depending on St/macromonomer ratio and the solution concentration.
View full abstract
-
K. Purushothama Chary, G. Hari Mohan, D. S. Iyengar
1999 Volume 28 Issue 11 Pages
1223-1224
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A new extremely facile, spontaneous and efficient cleavage of allyl protection is developed employing ZrCl
4/NaBH
4.
View full abstract
-
Hideki Kitamura, Tomohiro Ozawa, Koichiro Jitsukawa, Hideki Masuda, Hi ...
1999 Volume 28 Issue 11 Pages
1225-1226
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Two novel organic-inorganic hybridized molecules assembled with hydrogen- and coordinate-bonds, [Rh
2(O
2CMe)
4(daapy)
2] (daapy = 2,6-diacetylaminopyridine) and {[Rh
2(O
2CMe)
4][Ni(bpbg)
2]}
n (bpbg = biphenylbiguanide), have been prepared, which have been characterized by UV-vis, IR, and
1H NMR spectroscopic and thermogravimetric (TG) and X-ray diffraction methods.
View full abstract
-
Shin-ichi Ikeda, Kouji Kondo, Yoshiro Sato
1999 Volume 28 Issue 11 Pages
1227-1228
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A nickel complex catalyzes a new tandem coupling of chlorotrimethylsilane (Me
3SiCl), α,β-enones
1, alkynes
2, and di(alkynyl)zincs
7 (R′ = Bu,
t-Bu, Me
3Si, and Ph) to give the coupling products
3. This procedure was complementary to the reaction with alkynyltins.
View full abstract
-
Pu Qian, Hiroshi Nanjo, Toshiro Yokoyama, Toshishige M. Suzuki
1999 Volume 28 Issue 11 Pages
1229-1230
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
Self-assembled monolayers of
N-octadecylbenzamide (ODB) and
N-8-quinolyloctadecanamide (ODQ) have been observed on the solution-solid interface by scanning tunneling microscope (STM). ODB molecules form stripe shaped lamella structure whereas ODQ gave a mosaic pattern in which four molecular sets are interlocked alternately like jigsaw pieces.
View full abstract
-
Tomoko Mutou, Kiichi Amimoto, Hajime Kanatomi, Hiroyuki Koyama, Toshio ...
1999 Volume 28 Issue 11 Pages
1231-1232
Published: 1999
Released on J-STAGE: November 28, 2003
JOURNAL
RESTRICTED ACCESS
A series of 2,6-bis(2,2′-dicarbalkoxyethyl)pyridine ligands were prepared. A couple of the ligands linked by a
trans-PdCl
2 unit extracted alkali metal ions from an aqueous media into a chloroform media, while a single pyridine ligand did not work as an extractive reagent.
View full abstract
