-
Hong-Ping Lin, Chih-Pin Tsai
2003 Volume 32 Issue 12 Pages
1092-1093
Published: 2003
Released on J-STAGE: October 28, 2003
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The 30–100 nm primary particles of mesoporous silica have been conveniently synthesized from a highly dilute aqueous solution of C
nTAMX–sodium silicate.
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Huan Chen, Yapeng Li, Fengwei Huo, Zhiqiang Wang, Xi Zhang
2003 Volume 32 Issue 12 Pages
1094-1095
Published: 2003
Released on J-STAGE: November 03, 2003
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We have demonstrated that the self-assembled monolayer (SAM) of spironaphthoxazine-thioether (SNOTE) can complex metal ions based on the complexation property of the open ring form of spironaphthoxazine induced by UV irradiation, and the well-isolated sensing species in SAMs show a kinetic advantage over the closely packed ones.
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Go Nishimura, Yasuhiro Shiraishi, Takayuki Hirai
2003 Volume 32 Issue 12 Pages
1096-1097
Published: 2003
Released on J-STAGE: November 03, 2003
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Zeolite modified with octadecyl and diethylenetriamine groups (ZOD), which floats on surface of water, sinks into the water via the formation of metal–ligand complex, owing to the increase in hydrophilicity. The degree of the sinking depends on the metal ions coordinated, allowing selective recovery of ZOD particles loading high concentration of specific metal ion.
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Shushi Suzuki, Yusuke Ohminami, Tetsuya Tsutsumi, M. M. Shoaib, Masaru ...
2003 Volume 32 Issue 12 Pages
1098-1099
Published: 2003
Released on J-STAGE: November 03, 2003
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We have observed MoO
3(010) surface on an atomic level by NC-AFM(Noncontact atomic force microscopy) for the first time. White arrays with 0.40 and 0.37 nm dimensions along [100] and [001], respectively, were observed, which corresponded to the topmost oxygen atoms of MoO
3(010).
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Taichi Shintou, Teruaki Mukaiyama
2003 Volume 32 Issue 12 Pages
1100-1101
Published: 2003
Released on J-STAGE: November 03, 2003
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A new type of oxidation–reduction condensation using in situ formed alkoxydiphenylphosphines (i.e., diphenylphosphinite esters), easily available 1,4-benzoquionone and carboxylic acids provides a new and efficient method for the preparation of alkyl carboxylates from the corresponding alcohols under mild and neutral conditions. Further, the yields of the corresponding inverted carboxylates were equally high in the case of chiral secondary or tertiary alcohols.
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Mitsunobu Doi, Akiko Asano, Daisuke Yamamoto
2003 Volume 32 Issue 12 Pages
1102-1103
Published: 2003
Released on J-STAGE: November 03, 2003
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A water molecule forms a hydrogen bond with the aromatic π-electron system within the crystal structure of H–Phe–Leu–NH
2 hydrochloride monosolvate. This water molecule located above the phenyl ring plane, 3.119 Å from the centroid of the ring. Ab initio energy calculations revealed the stabilization energy of the phenyl ring–water hydrogen bond to be 3.26 kcal/mol.
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Shigehiro Yamaguchi, Masataka Miyasato, Kohei Tamao
2003 Volume 32 Issue 12 Pages
1104-1105
Published: 2003
Released on J-STAGE: November 03, 2003
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Upon treatment of cyclic 1,2-bis(silylethynyl)benzenes with lithium naphthalenide, the intramolecular reductive cyclization proceeds in an
endo–endo mode to produce 1,4-dilithio-2,3-disilylnaphthalenes, which are transformed into a series of 1,4-difunctionalized 2,3-disilylnaphthalenes.
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Wakako Suzuki, Emiko Fujiwara, Akiko Kobayashi, Yuichi Fujishiro, Eiji ...
2003 Volume 32 Issue 12 Pages
1106-1107
Published: 2003
Released on J-STAGE: November 03, 2003
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A new palladium complex with extended-TTF (TTF = tetrathiafulvalene) dithiolate ligands, [Pd(dt)
2] (dt = tetrathiafulvalenedithiolate) was prepared and its crystal structure was determined by synchrotron radiation X-ray powder experiments. [Pd(dt)
2] is a semiconductor with a room temperature conductivity of 0.3 S cm
-1.
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Xing-Zheng Wu, Keiko Akiyama
2003 Volume 32 Issue 12 Pages
1108-1109
Published: 2003
Released on J-STAGE: November 03, 2003
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Time-resolved luminol chemiluminescence (CL) with a time resolution of μs in photocatalytic reaction of TiO
2 suspension was reported. It was found that the luminol CL signal was observed after about 15 μs of illumination of a pulse light of 355 nm, and reached maximum at about 40–60 μs, then decreased slowly with time.
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Kei Inumaru, Yuta Inoue, Shintaro Kakii, Tomoyasu Nakano, Shoji Yamana ...
2003 Volume 32 Issue 12 Pages
1110-1111
Published: 2003
Released on J-STAGE: November 10, 2003
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Molecules having hydrophobic and hydrophilic groups such as 4-
n-heptylaniline and 4-nonylphenol, an endocrine disrupter, fit the organic–inorganic nanostructure in alkyl-grafted MCM-41, interacting with the inorganic walls as well as the organic moiety, and thus the adsorbent achieves high molecular adsorption selectivity.
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Yoshinori Murakami, Taweesak Saejung, Chikako Ohashi, Nobuyuki Fujii
2003 Volume 32 Issue 12 Pages
1112-1113
Published: 2003
Released on J-STAGE: November 10, 2003
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Mechanism of naphthalene (
c-C
10H
8) formation by the recombination of cyclopentadienyl radicals (
c-C
5H
5) was investigated by monitoring the time profiles of H atom behind the reflected shock of trifluoromethoxybenzene (C
6H
5OCF
3) highly diluted with Ar. The rate constant for
c-C
5H
5 +
c-C
5H
5 →
c-C
10H
8 + 2H was determined to be 3.3 × 10
17 exp(−135 kJ/
RT) cm
3 mol
−1 s
−1.
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Masaharu Tsuji, Masayuki Hashimoto, Yuki Nishizawa, Takeshi Tsuji
2003 Volume 32 Issue 12 Pages
1114-1115
Published: 2003
Released on J-STAGE: November 10, 2003
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Triangular, square, and hexagonal gold nanoplates with diameters of 30–90 nm have been prepared through a microwave-polyol method. These nanoplates gave new plasmon band of Au in the 550–800 nm region. It was concluded that nonthermal effect plays a significant role for the formation of Au nanoplates under microwave irradiation.
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Qianfu Luo, Xiaochuan Li, Shuping Jing, Weihong Zhu, He Tian
2003 Volume 32 Issue 12 Pages
1116-1117
Published: 2003
Released on J-STAGE: November 10, 2003
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A novel bisthienylethene as yellow colour photochromic and acidichromic dye has been prepared by a simple and low cost route, and its PC film shows a fast response reversible colour change between colourless and yellow colour by exposure to gaseous acid and ammonia.
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Hiroki Akutsu, Jun-ichi Yamada, Shin’ichi Nakatsuji
2003 Volume 32 Issue 12 Pages
1118-1119
Published: 2003
Released on J-STAGE: November 10, 2003
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We report the genuine-organic magnetic conductor including organic free radical as a part of a counter anion, α-(BEDT-TTF)
3(TEMPO–NHCOCH
2SO
3)
2·6H
2O, which consists of the conducting layers of the BEDT-TTF cations arranged in the α-packing mode and the magnetic layers of the TEMPO–NHCOCH
2SO
3 anions with water molecules alternatively along the
c axis. In the magnetic layer, TEMPO groups gather to form a 1-D ferromagnetic network. The salt is semiconductive (ρ
RT = 5.1 Ω·cm and
Ea = 0.050 eV) and its temperature-dependent susceptibility obeys the 1-D ferromagnetic Heisenberg model (
C = 0.380 emu/mol K and
J = +0.42 K).
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D. Kumaresan, M. Ravikanth
2003 Volume 32 Issue 12 Pages
1120-1121
Published: 2003
Released on J-STAGE: November 10, 2003
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Synthesis of second generation poly(benzyl ether) dendrimers having N
3O porphyrin at its core and the first observation of large micro-meter sized spherical aggregates as confirmed by optical microscopy and AFM analysis are reported.
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Yoshinori Takashima, Yoshinori Kawaguchi, Shinya Nakagawa, Akira Harad ...
2003 Volume 32 Issue 12 Pages
1122-1123
Published: 2003
Released on J-STAGE: November 10, 2003
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Cyclodextrins (CDs) have been found to form inclusion complexes with lactones in aqueous solutions and/or in the solid states; hydrolysis of lactones has been found to be suppressed or promoted by CDs according to the combination of lactones and CD.
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Yutaka Takaguchi, Yoshiaki Katayose, Yasushi Yanagimoto, Jiro Motoyosh ...
2003 Volume 32 Issue 12 Pages
1124-1125
Published: 2003
Released on J-STAGE: November 10, 2003
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A new fullerodendrimer having fullerene–sulfur bonds as a linkage was prepared by the use of a binary system of organic dichalcogenide. Aggregation of the fullerodendrimer on mica surface was observed by atomic force microscopy (AFM) experiment.
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Jiahe Liang, Yadong Li
2003 Volume 32 Issue 12 Pages
1126-1127
Published: 2003
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A template-free hydrothermal method to Ni(OH)
2 single-crystal nanorods were successfully established based on the 2-D layered structures of Ni(OH)
2. The obtained Ni(OH)
2 nanorods were 40–90 nm in diameters and 1–3 μm in lengths. It is interesting that Ni(OH)
2 nanorods would be converted into NiO nanorings when they were annealed at 500 °C for 6 h.
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Kazutoshi Noda, Ryuuichi Naganawa, Yasumasa Kanekiyo, Hiroaki Tao
2003 Volume 32 Issue 12 Pages
1128-1129
Published: 2003
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A new quartz crystal microbalance-based method has been developed for high-sensitivity detection of trichloroethylene. The method uses oxidizing agents such as lead dioxide and sulfuric acid, by which trichloroethylene is converted into hydrogen chloride, which in turn reacts directly with a copper electrode placed on the quartz crystal surface. The new method enables the measurement of very low concentrations of trichloroethylene, and has a detection limit comparable to the Japanese Environmental Standard (0.2 mg·m
−3).
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Masaki Yoshio, Hongyu Wang, Kenji Fukuda, Takeshi Abe, Zempachi Ogumi
2003 Volume 32 Issue 12 Pages
1130-1131
Published: 2003
Released on J-STAGE: November 17, 2003
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Thermal vapor decomposition (TVD) process has been applied to coat soft carbon onto the surface of hard carbon beads. The resultant spherical hard–soft carbon composites with “core-shell” structure demonstrate better electrochemical performance than the starting hard carbon beads as anode materials in lithium-ion batteries. The effect of TVD-carbon shell on the electrochemical performance was correlated with some physical properties.
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Kunihiro Gotoh, Jun Kubo, Wataru Ueda, Tohru Mori, Yutaka Morikawa
2003 Volume 32 Issue 12 Pages
1132-1133
Published: 2003
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The carbonyl group of 1,3-dichloro-2-propanone was reduced selectively through hydrogen transfer from 2-butanol over MgO, SiO
2·Al
2O
3, Al
2O
3, and ZrO
2. It is suggested that the reaction is promoted by either base or acid site of the catalysts.
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Dazhen Wu, Xuewu Ge, Songnan Chu, Zhicheng Zhang
2003 Volume 32 Issue 12 Pages
1134-1135
Published: 2003
Released on J-STAGE: November 17, 2003
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Nanocomposite monodisperse polystyrene microspheres (ca. 90 nm) containing homogeneously dispersed silica nanoparticles (ca. 6 nm) have been successfully produced by combining happily the techniques of microemulsion, emulsion and γ-ray irradiation. The product was characterized with TEM, FTIR, and TGA. A possible formation mechanism of the nanocomposite was proposed.
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Manas Kumar Saha, Dilip Kumar Dey, Chirantan Roy Choudhury, Subrata Ku ...
2003 Volume 32 Issue 12 Pages
1136-1137
Published: 2003
Released on J-STAGE: November 17, 2003
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Redox reaction between [(phen)
4Fe
2(Cl)
2(μ-O)]Cl
2·4.5H
2O (phen = 1,10-phenanthroline) and Mn(OH)
2·
xH
2O in water methanol solution at refluxing temperature under inert atmosphere gives a novel low-spin iron(II)–oxo complex [(phen)
4Fe
2(Cl)
2(μ-O)]·4H
2O (
1) which has been characterised by IR, Mössbauer, electrochemical and magnetic studies. The crystal structure shows that complex
1 is a dinuclear single oxo-bridged Fe(II) species with distorted octahedral geometry.
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Ming-Qing Chen, Tatsuo Kaneko, Ming Zhang, Xiao-Ya Liu, Kang Wu, Mitsu ...
2003 Volume 32 Issue 12 Pages
1138-1139
Published: 2003
Released on J-STAGE: November 17, 2003
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Uniform polymeric nanospheres comprised of hydrophilic cores and hydrophobic coronas were prepared by dispersion free radical copolymerization of acrylamide with poly(
tert-butyl methacrylate) macromonomer (PtBMA) in ethanol/water mixed solvents, and the effects of cross-linker addition on the nanosphere size were investigated. Chemical analysis by electron spectroscopy confirmed that hydrophobic PtBMA chains grafted to the nanosphere surfaces. Changes in concentrations of the monomers and the cross-linker controlled the hydrodynamic diameter of the nanospheres (140–540 nm).
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Ying-Jie Zhu, Xian-Luo Hu
2003 Volume 32 Issue 12 Pages
1140-1141
Published: 2003
Released on J-STAGE: November 17, 2003
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Single-crystalline gold (Au) nanorods and nanowires have been successfully prepared in liquid phase by one-step, seedless and template-free microwave-polyol method. Ethylene glycol (EG) reduced HAuCl
4 to form Au by microwave heating at 160 °C. Single-crystalline Au with other morphologies was also produced.
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Xiao-zhi Liu, Shi-wei Lu
2003 Volume 32 Issue 12 Pages
1142-1143
Published: 2003
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An efficient method for the catalytic monoreduction of aromatic dinitro compounds to nitroanilines is reported. In the presence of selenium catalyst, the dinitroaromatic compounds are selectively reduced by CO/H
2O to the corresponding nitroanilines under atmospheric pressure. The mono-reduction occurs in high selectivity regardless of the substitution groups on the aromatic ring without affecting other reducible functional groups.
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Junji Kobayashi, Tomohiro Agou, Takayuki Kawashima
2003 Volume 32 Issue 12 Pages
1144-1145
Published: 2003
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A novel synthetic route to a 9-phosphatriptycene was developed by utilizing
ortho-lithiation of a triarylphosphine oxide as a key step. Systematic comparisons of the NMR spectra of 9-phosphatriptycene derivatives indicated the large s character of the lone pair orbital or the phosphorus–chalcogen bonds of the 9-phosphatriptycene derivatives.
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Bo Yang, Shoko Kamiya, Hiroharu Yui, Mitsutoshi Masuda, Toshimi Shimiz ...
2003 Volume 32 Issue 12 Pages
1146-1147
Published: 2003
Released on J-STAGE: November 17, 2003
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A novel glycolipid,
N-(11-
cis-octadecenoyl)-β-
D-glucopyranosylamine self-assembles in water to provide monodispersed and well-defined glycolipid nanotubes (LNTs) with a high-axial-ratio structure. Mechanical stirring of the LNT suspension proved to convert the obtained long LNTs into short ones (<10 μm) in length, depending on the feature of hydrogen bond network in the LNTs.
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Akira Nakajima, Shunsuke Suzuki, Yoshikazu Kameshima, Naoya Yoshida, T ...
2003 Volume 32 Issue 12 Pages
1148-1149
Published: 2003
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The sliding acceleration of a water droplet on a silicon surface treated with octadecyltrichlorosilane was evaluated by changing the droplet weight. All water droplets slide down with a constant sliding acceleration. The slope of the sliding acceleration against the droplet weight was changed at 20 mg, suggesting that the dominant sliding mode was shifted from slipping to rolling.
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Yasuaki Okamoto, Takao Kawabata, Takeshi Kubota, Ichiro Hiromitsu
2003 Volume 32 Issue 12 Pages
1150-1151
Published: 2003
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A novel structure of the CoMoS phase, dinuclear Co clusters located on the edges of MoS
2 particles, is proposed on the basis of an antiferromagnetic property of the Co atoms in highly active Co–Mo model sulfide catalysts prepared by a CVD technique using Co(CO)
3NO.
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Shoichiro Asayama, Hiroyoshi Kawakami, Shoji Nagaoka
2003 Volume 32 Issue 12 Pages
1152-1153
Published: 2003
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We have synthesized the poly(
L-histidine) (PLH) with aliphatic primary amino groups for conjugation as a new pH-sensitive polypeptide. The resulting aminated PLH suddenly precipitated out of the aqueous medium above pH 6.0 owing to the deprotonation of imidazole groups. The aminated PLH was successfully conjugated with maltopentaose by reductive amination. The resulting PLH-maltopentaose conjugate improved its water solubility at physiological pH.
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Takurou N. Murakami, Haruhisa Saito, Sadao Uegusa, Norimichi Kawashima ...
2003 Volume 32 Issue 12 Pages
1154-1155
Published: 2003
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Surface activation of TiO
2 mesopores in contact with aqueous electrolytes was conducted by hydrophilic conversion and reaction of chemical adsorbents. Water-based dye-sensitized solar cell was fabricated as an environmentally benign device. The solar cell yielded high conversion efficiency up to 2.2%.
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Yoshiaki Sakatani, Jun Nunoshige, Hiroyuki Ando, Kensen Okusako, Hiron ...
2003 Volume 32 Issue 12 Pages
1156-1157
Published: 2003
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La
3+ and N co-doped TiO
2, which contained paramagnetic N species, decomposed acetaldehyde under visible light irradiation. The number of the paramagnetic N species seemed to control the absorption of visible light and the activity.
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Samar Kumar Guha, Yutaka Ukaji, Katsuhiko Inomata
2003 Volume 32 Issue 12 Pages
1158-1159
Published: 2003
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The desilylation reaction of γ-silylated allylic sulfones was found to proceed through γ-silylated (
E)-vinylic sulfones to afford the corresponding allylic sulfones by treatment with DBU and H
2O. The
Z/
E ratio of the resulting allylic sulfones varied according to the γ-substituents of the γ-silylated sulfones. This stereochemical outcome was rationalized by “
syn-effect.”
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Xiaojing Yang, Weiping Tang, Zong-huai Liu, Kazuya Ikeda, Kenta Ooi
2003 Volume 32 Issue 12 Pages
1160-1161
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Birnessite-type lithium manganese oxide coprecipitated with Nafion showed improved stability on cycling as a cathode material for a Li-rechargeable battery at large current density.
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Taku Satoh, Nobuo Sakairi
2003 Volume 32 Issue 12 Pages
1162-1163
Published: 2003
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N-phthaloylchitosan with high structural regularity found to be a good substrate for nucleophilic substitution with
N-halosuccinimides and triphenylphosphine in
N-methyl-2-pyrrolidone, which provided the corresponding 6-deoxyhalogenated derivatives in a highly regioselective manner.
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Akiko Kawai, Takuji Ikeda, Yoshimichi Kiyozumi, Fujio Mizukami
2003 Volume 32 Issue 12 Pages
1164-1165
Published: 2003
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One of the layered silicates RUB-15, having TMA (Tetramethylammonium) ions between the layers, was rapidly synthesized by using cyclic ethers. The reaction with cyclic ethers was 6 times faster than that without cyclic ethers. The other organic solvent did not produce RUB-15 in 5 days. The effect of cyclic ethers is investigated by
29Si NMR.
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Takuya Nakanishi, Hironori Iida, Tetsuya Osaka
2003 Volume 32 Issue 12 Pages
1166-1167
Published: 2003
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Nanometer-size particles of iron oxide were prepared by a successive reduction–oxidation of ferric or ferrous ions within reverse micelles. Nanoparticles of iron oxide were collected from reverse micellar solution as precipitates by adding modifier molecules. The X-ray diffraction patterns and magnetic properties of thus-prepared samples suggested the formation of nanocrystalline phase of maghemite, γ-Fe
2O
3.
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Hiroki Takao, Yukio Furukawa
2003 Volume 32 Issue 12 Pages
1168-1169
Published: 2003
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Infrared absorption induced by field effect from a metal–insulator–semiconductor diode with an Au/aluminum oxide/regioregular poly(3-hexylthiophene) structure has been obtained by using a combination of infrared reflection–absorption spectroscopy and the FT-IR difference-spectrum method. The observed bands have been attributed to carriers (positive polarons) injected into the polymer layer and accumulated near the surface of the layer.
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Kazuhiro Miyawaki, Rie Goto, Motonari Shibakami
2003 Volume 32 Issue 12 Pages
1170-1171
Published: 2003
Released on J-STAGE: November 24, 2003
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This paper describes the first preparation of lipid microtubules that are composed of macrocyclic lipids. The lipid contains diacetylenic alkyl chains in a hydrophobic segment and phosphatidylcholine as a hydrophilic headgroup. The structural features of the assembly include: (i) monolayer wall, (ii) micron scale length, (iii) nano scale diameter, and (iv) elasticity.
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Takahiko Kojima, Hironori Kitaguchi, Yoshimitsu Tachi, Yoshinori Narut ...
2003 Volume 32 Issue 12 Pages
1172-1173
Published: 2003
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A novel Cu(II) complex bearing a 2,2′-bipyridine derivative with malonylamide moieties showed regioselective molecular recognition behaviour toward
m-aminobenzoic acid by both coordination and hydrogen bonding and this recognition should be an induced fit to the flexible recognition site of the Cu(II) complex.
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Mingzhe Liu, Daisuke Tamaru, Hiroyuki Asanuma, Makoto Komiyama
2003 Volume 32 Issue 12 Pages
1174-1175
Published: 2003
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By introducing two azobenzene moieties into both RNA polymerase binding region and TATA region in the promoter of the SP6 RNA polymerase simultaneously, clear-cut photo-regulation of the transcription reaction was achieved either under dark or by UV irradiation.
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Tatsumi Ishihara, Kazuhiro Anami, Keiko Takiishi, Hiroshi Yamada, Hiro ...
2003 Volume 32 Issue 12 Pages
1176-1177
Published: 2003
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It was found that the substitution of Mn with Cu in La
0.7Ba
0.3Mn
0.8In
0.2O
3 is effective for increasing activity to NO direct decomposition. NO direct decomposition proceeds on the perovskite oxide of La
0.7Ba
0.3Mn
0.6In
0.2Cu
0.2O
3 under coexistence of O
2, H
2O, and SO
2 at high temperature.
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Kenji Matsuda, Yoshihiro Shinkai, Tadatsugu Yamaguchi, Kazuko Nomiyama ...
2003 Volume 32 Issue 12 Pages
1178-1179
Published: 2003
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Dithienylethenes having a pyridinium cation at one and both thiophene rings were synthesized. The derivatives with two pyridinium cation showed the cyclization quantum yield as high as 0.71, which is much larger than the values of the monocation derivative and the neutral form. This can be explained by the conformation of the open-ring isomer of the diarylethenes.
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Arumugasamy Elangovan, Chieh-Ju Wang, Tong-Ing Ho
2003 Volume 32 Issue 12 Pages
1180-1181
Published: 2003
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New donor–acceptor 2,3-diarylnorbornadienes (
1N–
4N) showing high quantum yields for the blue light induced valence isomerization from the norbornadienes into quadricyclanes and the latters’ thermal reversion are studied in comparison with their protonated counterparts.
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Shoko S. Ono, Tomoaki Matsugi, Osamu Matsuoka, Shin-ichi Kojoh, Teruno ...
2003 Volume 32 Issue 12 Pages
1182-1183
Published: 2003
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Morphology of a well-defined polyethylene-
b-poly(ethylene-
co-propylene) (PE-
b-EPR) on a mica surface was analyzed by atomic force microscopy (AFM). The analyses suggested that the block copolymer, in which the PE lamella is covered with the amorphous EPR segment, can exist without aggregation and possesses a tendency to assemble to one another to form a needle-like structure.
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Kentaro Teramura, Tsunehiro Tanaka, Takuzo Funabiki
2003 Volume 32 Issue 12 Pages
1184-1185
Published: 2003
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Photoformed hole and electron on TiO
2 adsrobing NH
3 are trapped, respectively, by a NH
3 species adsorbed on TiO
2 and Ti
4+ to evolve a NH
2 radical and a Ti
3+ species. The photoinduced electron transfer takes place between Ti
4+ and adsorbed NH
3 species efficiently, resulting in the formation of a NH
2 radical. The NH
2 radical on TiO
2 was stably present after the photoirradiation was ceased. It is quenched rapidly just after introduction of NO leaving the Ti
3+ species.
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Anuj Sharma, Bhupendra P. Joshi, Arun K. Sinha
2003 Volume 32 Issue 12 Pages
1186-1187
Published: 2003
Released on J-STAGE: November 27, 2003
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A convenient, inexpensive, and efficient synthesis of 3-phenylpropionic acids (
1a–
1f) by reacting benzaldehyde (
2a–
2f) and malonic acid in acetic acid and piperidine into cinnamic acid (
3a–
3f) in 77 to 89% followed by its reduction with PdCl
2 in the biphase of formic acid and aqueous sodium hydroxide is reported under microwave irradiation which utilizes short reaction time ranging 5 to 7 min to provide
1a–
1f in moderate to high yield (69–86%) depending upon methoxy, methylenedioxy, and hydroxy groups present at the phenyl ring.
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Luyang Chen, Yunle Gu, Liang Shi, Jianhua Ma, Zeheng Yang, Yitai Qian
2003 Volume 32 Issue 12 Pages
1188-1189
Published: 2003
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Nanocrystalline boron phosphide (BP) has been prepared by the reaction of PCl
3 with NaBH
4 at 600 °C in an autoclave. The X-ray powder diffraction patterns can be indexed as cubic BP with the lattice constants of
a = 4.53 Å. The transmission electron microscopy (TEM) image shows particle morphology, with average size of 10 nm for the powders. The selected area electron diffraction (SAED) patterns confirm the prepared BP.
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Shital K. Chattopadhyay, Benoy K. Pal, Susama Maity
2003 Volume 32 Issue 12 Pages
1190-1191
Published: 2003
Released on J-STAGE: November 27, 2003
JOURNAL
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A new route involving double Claisen rearrangement of a suitable 1,4-diallyloxyarene system followed by ring-closing metathesis of the resulting diene has been developed for the synthesis of various benzannulated cyclohexenes. An important demonstration of this methodology is the construction of the tetracyclic quinophenolic ring system of the clinically important anthracyclines.
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