-
Zhong-jie Jiang, Chun-yan Liu, Yun Liu, Zhi-ying Zhang, Yong-jun Li
2003 Volume 32 Issue 8 Pages
668-669
Published: 2003
Released on J-STAGE: June 30, 2003
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Core-shell assembly of negatively charged silver nanoparticles on silica has been obtained via electrostatic attraction and coordination. The thickness of shell can be easily tailored by a layer-by-layer technique.
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Shigetaka Hayano, Hiroshi Kurakata, Daisuke Uchida, Masato Sakamoto, N ...
2003 Volume 32 Issue 8 Pages
670-671
Published: 2003
Released on J-STAGE: June 30, 2003
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Novel crystalline polymer, crystalline hydrogenated poly(
endo-dicyclopentadiene), was developed on the basis of the development of new cis- and iso-specific ROMP catalysts such as MoO(rac-5,5′,6,6′-Me
4-3,3′-
t-Bu
2-2,2′-biphenolate)
2.
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J. S. Yadav, B. V. S. Reddy, G. Kondaji
2003 Volume 32 Issue 8 Pages
672-673
Published: 2003
Released on J-STAGE: July 07, 2003
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Room temperature ionic liquids have been employed for the first time as novel and recyclable reaction media for the chemoselective conversion of aldehydes into their corresponding 1,3-oxathio- and dithioacetal derivatives in excellent yields under mild and neutral conditions. A wide range of functional and protecting groups such as TBDMS, PMB, THP, MOM, benzyl, propargyl ethers, acetonides, carbamates and esters are survived under these reaction conditions. The recovered activated ionic liquids can be recycled for four to five subsequent runs with consistency in activity.
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Atsushi Kimoto, Jun-Sang Cho, Masayoshi Higuchi, Kimihisa Yamamoto
2003 Volume 32 Issue 8 Pages
674-675
Published: 2003
Released on J-STAGE: July 07, 2003
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We have synthesized novel carbazole dendrimers via cyclotrimerization. This synthetic procedure to prepare the dendrimers, especially with a higher generation, via the cyclization reaction was found to be an extremely effective method. These dendrimers have the ability to assemble metal ions such as Sn
2+ and Eu
3+, resulting in a change in its fluorescence property.
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Taichi Shintou, Wataru Kikuchi, Teruaki Mukaiyama
2003 Volume 32 Issue 8 Pages
676-677
Published: 2003
Released on J-STAGE: July 07, 2003
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A new one-pot cross-coupling reaction between Grignard reagents and alkoxymethyldiphenylphosphonium iodides, which were in situ-formed from
nBuLi-treated alcohols, chlorodiphenylphosphine and iodomethane, proceeded smoothly to afford the corresponding coupling products in good to high yields.
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Shyamaprosad Goswami, Avijit Kumar Adak
2003 Volume 32 Issue 8 Pages
678-679
Published: 2003
Released on J-STAGE: July 07, 2003
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A five membered cyclic pyrido[1,2-
a]quinoxaline phosphate has been first synthesized in one step in a good yield by phosphorylation of the quinoxaline derivative of sugar
1a with (PhO)P(O)Cl
2. Phosphorylation of the tetrols (
1a and
1b) and the diol acetals with other phosphorylating agents, however, affords a dehydration product 2-(2-furyl)quinoxaline.
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Koichi Tanaka, Yohei Yamamoto, Hideyuki Takano, Mino R. Caira
2003 Volume 32 Issue 8 Pages
680-681
Published: 2003
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A remarkable deuterium isotope effect on the photochromism of 3,3′-diaryl-3
H,3′
H-[2,2′]biindenylidene-1,1′-dione (
2) in the solid state has been found. The yellow crystals of
2 and
2-
d2 were immediately changed to reddish purple crystals upon photoirradiation in the solid state. The reddish purple crystals of
2-
d2 returned back to the original yellow crystals under dark for 72 h, whereas that of
2 faded within 2 h.
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Yongguo Zhou, Yuedong Yang, Dongjun Wang, Xiaomin Liu
2003 Volume 32 Issue 8 Pages
682-683
Published: 2003
Released on J-STAGE: July 07, 2003
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The hydroxymethyl group of 2-amino-2-deoxy-
D-glucose unit in chitosan was selectively oxidized to carboxyl group with NO
2 to form amphoteric chitosan by one step so as to give chitosan a new bioactivity. The structure and properties of amphoteric chitosan are discussed.
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Akimitsu Okamoto, Kazuki Tainaka, Isao Saito
2003 Volume 32 Issue 8 Pages
684-685
Published: 2003
Released on J-STAGE: July 07, 2003
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We report the fluorescence properties of oligodeoxynucleotides (ODNs) containing a base-discriminating fluorescent nucleoside, benzopyridopyrimidine (BPP), in hybridizing with RNAs possessing different bases opposite BPP. BPP-containing ODN selectively exhibited a strong fluorescence when the RNA base opposite BPP was A, whereas the fluorescence of BPP-containing ODN hybridized with RNA possessing G opposite BPP was very weak. BPP acts as a good base-discriminating fluorescent nucleoside for A/G single base alteration of RNA.
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Zhen Xie, Zhiyong Wang, Yanxiong Ke, Zhenggen Zha, Chao Jiang
2003 Volume 32 Issue 8 Pages
686-687
Published: 2003
Released on J-STAGE: July 07, 2003
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Nanosilver was prepared by photoreduction method and the size and shape of the nanosilver can be easilly controlled by changing the organic capping reagent such as pyridine, nicotinic acid, 2,2′-dipyridylamine and 2,2′-bipyridine. Using different capping reagents, different shapes of nanosilvers, such as nanoribbon, nanotriangle or nanowire, can be obtained under mild condition.
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Toshiyuki Ito, Akira Inoue, Kae Sato, Kazuo Hosokawa, Mizuo Maeda
2003 Volume 32 Issue 8 Pages
688-689
Published: 2003
Released on J-STAGE: July 07, 2003
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Affinity capillary electrophoresis of DNA was conducted in a poly(dimethylsiloxane)-glass hybrid microchip with a 100 μm (width) × 130 μm (height) microchannel containing poly(
N,
N-dimethylacrylamide)-DNA conjugate. By this method, sample 12-mer oligonucleotide composed of c-K-
ras codon 10-13 was separated from its single-base substituted mutant within 2 min.
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Satoshi Seino, Takuya Kinoshita, Yohei Otome, Kenji Okitsu, Takashi Na ...
2003 Volume 32 Issue 8 Pages
690-691
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Magnetic composite nanoparticle of Au/γ-Fe
2O
3 was synthesized in an aqueous phase using gamma-ray. Connection between gold and γ-Fe
2O
3 was confirmed by the magnetic separation technique. TEM observation shows that 5-nm gold particles were dispersed on 20-nm γ-Fe
2O
3 particles. The nanoparticles adsorbed a water-soluble mercaptan, glutathione, and was manipulated by an external magnetic field.
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Masahiko Ooe, Makoto Murata, Atsushi Takahama, Tomoo Mizugaki, Kohki E ...
2003 Volume 32 Issue 8 Pages
692-693
Published: 2003
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The Pd complexes were noncovalently attached on the periphery of poly(propyleneimine) dendrimers based on acid-base interactions. The dendritic Pd complexes were found to possess catalytic activities for allylic amination, and to be able to mimick the catalytic activity of the analogous monomeric Pd complex catalyst.
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Kazuya Nakamura, Tatsuhiko Fujimoto, Satoshi Takara, Ken-ichi Sugiura, ...
2003 Volume 32 Issue 8 Pages
694-695
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A series of α,ω-bis(
meso-porphyrinyl)oligoacetylenes were systematically prepared. The exciton interaction between the porphyrins gradually decreased with increasing number of acetylenes, whereas the interaction between the porphyrin and the oligoacetylene unit appeared.
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Takashi Nakagawa, Hidehiko Fujisawa, Teruaki Mukaiyama
2003 Volume 32 Issue 8 Pages
696-697
Published: 2003
Released on J-STAGE: July 07, 2003
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Lithium acetate catalyzed aldol reaction between trimethylsilyl enolates and aldehydes in a DMF–H
2O (50:1) solvent proceeded smoothly to afford the corresponding aldols in good to high yields. It is noted that trimethylsilyl enolates derived from carboxylic esters behaved as excellent nucleophiles in the above reaction.
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Hiroshi Yao, Hiroyuki Kojima, Seiichi Sato, Keisaku Kimura
2003 Volume 32 Issue 8 Pages
698-699
Published: 2003
Released on J-STAGE: July 07, 2003
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Two-dimensional (2D) superlattices of mercaptosuccinic acid-modified gold nanoparticles were constructed at an air/water interface in the presence of 4-pyridinecarboxylic acid (PyC). Hydrogen-bonding interaction caused the incorporation of PyC into the surface-functionalized gold nanoparticles, suggesting that the interparticle spacing in the superlattices is controllable with an intercalating molecule.
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Hidekatsu Yokoyama, Toshiyuki Sato, Kouichi Fukui, Osamu Itoh, Hiroaki ...
2003 Volume 32 Issue 8 Pages
700-701
Published: 2003
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In a longitudinally detected ESR (LODESR) method, longitudinal (i.e., parallel to the static magnetic field) magnetization changes caused by on/off modulated ESR irradiation are observed. In this study, LODESR oximetry was newly designed so that a detection frequency was fixed and on/off modulation frequencies were varied. LODESR signal intensities when the modulation frequency was equal to the detecting frequency (fundamental harmonic detection) and when it was half the value of the detection frequency (secondary harmonic detection) were simulated at a constant detection frequency. Fundamental harmonic-to-secondary harmonic ratios (FSRs) were calculated by dividing the former by the latter. This simulation showed that FSR increased with the reciprocal of longitudinal relaxation time. LODESR measurements of phantoms containing triarylmethyl or a nitroxide radical that had been dissolved in 10 cm
3 of a physiological saline solution and various concentrations of oxygen were made at an ESR frequency of 280 MHz. It was found that the FSRs of both phantoms increased as the concentration of oxygen increased.
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Mei-Juan Han, Qing-Dao Zeng, Li-Jun Wan, Chun-Li Bai
2003 Volume 32 Issue 8 Pages
702-703
Published: 2003
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Adsorption of two binaphthyl derivatives on Cu(111) electrode were investigated by STM and cyclic voltammetry. Both molecules adsorbed on the Cu(111) electrode surface in 0.1 M HClO
4 solution and formed well-defined adlayers with a (4 × 4) symmetry in the double layer potential region. With the high resolution STM images, the configurations of individual molecules were determined. According to the experimental results, structural models are proposed for the adlayers.
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K. Suresh Babu, B. China Raju, P. V. Srinivas, A. Sridhar Rao, S. Prav ...
2003 Volume 32 Issue 8 Pages
704-705
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A highly selective cleavage of prenyl ethers has been achieved in high yields using
p-toluenesulfonic acid under extremely mild conditions. This method is compatible with a wide variety of functional groups such as methyl, benzyl, allyl ethers and benzyl, methyl, prenyl esters present in the molecules.
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Supitcha Thongchant, Yasuchika Hasegawa, Yuji Wada, Shozo Yanagida
2003 Volume 32 Issue 8 Pages
706-707
Published: 2003
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The particle size of EuS nanocrystals was gradually increased by addition of pyridine to the reaction mixture of europium metal and hydrogen sulfide in liquid ammonia. The size effect of EuS nanocrystals was found in the absorption spectra for the first time. The size effect on the magnetic properties of the nanocrystals was also observed.
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Yasuchika Hasegawa, Supitcha Thongchant, Tomoharu Kataoka, Yuji Wada, ...
2003 Volume 32 Issue 8 Pages
708-709
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EuO (Europium(II) oxide) nanocrystals are prepared under irradiation by means of an ArF excimer laser. The formation of EuO nanocrystals with the clear lattice fringes was confirmed by TEM image. The crystal growth was monitored by the emission spectra.
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Hiroyuki Ando, Toru Takahashi, Hideyuki Nakano, Yasuhiko Shirota
2003 Volume 32 Issue 8 Pages
710-711
Published: 2003
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Comparative studies have been performed on the formation of surface relief grating (SRG) using an amorphous molecular material, 4-[di(biphenyl-4-yl)amino]azobenzene (DBAB), and a vinyl polymer containing DBAB as a pendant chromophore. It was found that SRG was formed more rapidly for the photochromic amorphous molecular material than for the corresponding vinyl polymer.
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Shinya Oshita, Akikazu Matsumoto
2003 Volume 32 Issue 8 Pages
712-713
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A photofunctional organic solid was fabricated by the intercalation of azobenzene derivatives containing an amino group into poly(muconic acid) as the layered polymer crystals. The organic intercalation and photoisomerization behaviors depended on the structure of the spacer between the azobenzene and amino groups of the guest.
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Binzhi Ren, Sheng Ye, Xingguo Liang, Makoto Komiyama
2003 Volume 32 Issue 8 Pages
714-715
Published: 2003
Released on J-STAGE: July 14, 2003
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By using peptide nucleic acid (PNA) bearing an acridine at its N-terminus, a predetermined portion of DNA substrate was efficiently protected from nuclease S1. Promotion of the protecting activity by the acridine is remarkable enough to provide the target DNA fragment in high selectivity and yield.
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Carmen Stavarache, Mircea Vinatoru, Rokuro Nishimura, Yasuaki Maeda
2003 Volume 32 Issue 8 Pages
716-717
Published: 2003
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The influence of low frequency ultrasounds (28 and 40 kHz) versus mechanical stirring on the transesterification reaction of neat vegetable oil with methanol under base-catalysis was studied and the results are presented. It was found that the optimized variables of 6:1 methanol/oil (mol/mol), 0.5% NaOH (wt/wt), and 40 kHz ultrasonic irradiation at 25 °C for 20 min gave a maximum isolated ester yield of 98%.
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Shao-Hong Feng, Shu-Juan Zhang, Han-Qing Yu, Qian-Rong Li
2003 Volume 32 Issue 8 Pages
718-719
Published: 2003
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Both the efficiency and pathways of nitrobenzene degradation induced by γ-ray irradiation were significantly influenced by the addition of reactive species scavengers. Experimental results showed that the degradation of nitrobenzene was more favorable under oxidative conditions than under reductive conditions. Based on the product analysis by GC–MS, possible degradation mechanisms of nitrobenzene under both oxidative and reductive conditions were proposed.
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Nobuhito Kurono, Eiichi Honda, Fumikazu Komatsu, Kazuhiko Orito, Masao ...
2003 Volume 32 Issue 8 Pages
720-721
Published: 2003
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Electrochemical reduction of 2-(but-3-enyl)-1-haloarenes in the presence of phenanthrene as a mediator generated the corresponding aryl radicals and gave cyclized products in good yields. Higher regio- and stereoselectivities than those of usual radical cyclization using AIBN-TBTH were achieved.
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Satoko Tezuka, Ramesh Chitrakar, Akinari Sonoda, Kenta Ooi, Tahei Tomi ...
2003 Volume 32 Issue 8 Pages
722-723
Published: 2003
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Layered double hydroxides (LDHs) with different kinds of metals in the brucite layer were prepared and their anion exchange properties were studied batchwise. A nitrate ion-sieve property was observed for LDHs depending on the basal spacing of the brucite layer. The distribution coefficient of nitrate ion was a maximum on the Ni–Fe type LDHs having a basal spacing of 0.81 nm.
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Fushe Han, Minoru Hayashi, Yutaka Watanabe
2003 Volume 32 Issue 8 Pages
724-725
Published: 2003
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The synthesis of phosphatidyl-
D-
myo-inositol 3,5-bisphosphate [PtdIns(3,5)P2] has been conveniently accomplished via convergent routes starting from both enantiomers, 1,2-
O-cyclohexylidene-
myo-inositol. The synthetic strategy involves completely regioselective phosphorylation of 3,4-diol and 2,3,6-triol of the suitably protected inositols with the corresponding phosphite in the presence of pyridinium tribromide and 2,6-lutidine, resulting in the formation of 3-
O-phosphorylated products, respectively.
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Honglin Chen, Baojian Shen, Huifang Pan
2003 Volume 32 Issue 8 Pages
726-727
Published: 2003
Released on J-STAGE: August 05, 2003
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A novel one-pot procedure for the preparation of Y and ZSM-5 composite zeolite was developed by in situ hydrothermal crystallization of Y synthesis gel. Comparing to the mechanical mixture of ZSM-5
and Y zeolites, the composite material showed identical thermal and hydrothermal stability, better performances in dealumination and synergism advantages in catalytic cracking of heavy oil.
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Yushan Li, Masayuki Satake, Yasukatsu Oshima, Yasushi Ohizumi
2003 Volume 32 Issue 8 Pages
728-729
Published: 2003
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One new naphthoquinone, (4
R)-4,9-dihydroxy-8-methoxy-α-lapachone (
1), and two new iridoids, 7a-hydroxygelsemiol (
2) and 6-methoxysemperoside (
3) were isolated from
Verbena littoralis H. B. K. 1 (3-30 μM) and
2 (3 μM) showed a markedly enhancing activity of nerve growth factor (NGF)-mediated neurite outgrowth from PC12D cells.
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Zhu Yinghuai, Stefan Bahnmueller, Narayan S. Hosmane, John A. Maguire
2003 Volume 32 Issue 8 Pages
730-731
Published: 2003
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Manganese(III) acetate-promoted aromatic acetonylation has been accomplished with ultrasonic irradiation in ionic liquids, [
N-
n-pentyl-4-picolinium] [
closo-CB
11H
12] (
1), [OMIM] [BF
4] and [BMIM] [PF
6] in 62-93% yields, with excellent chemical selectivity.
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Ying-Jie Zhu, Xian-Luo Hu
2003 Volume 32 Issue 8 Pages
732-733
Published: 2003
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A new microwave-polythiol method has been developed for preparation of tellurium (Te) with various morphologies. 1,2-Ethanedithiol (EDT) was used as both a reducing reagent and a solvent. Reduction of TeO
2 by EDT was achieved by microwave-heating at ≤140 °C for 30 min. The morphology of Te could be controlled by changing experimental parameters.
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G. Mahender, R. Ramu, C. Ramesh, Biswanath Das
2003 Volume 32 Issue 8 Pages
734-735
Published: 2003
Released on J-STAGE: July 21, 2003
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Silica supported sodium hydrogen sulfate (NaHSO
4·SiO
2) has been found to be an efficient heterogeneous catalyst for chemo- and regioselective deprotection of acetonides at room temperature to produce the corresponding diols in excellent yields.
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Takamitsu Fukuda, Kosuke Ono, Shigetsugu Homma, Nagao Kobayashi
2003 Volume 32 Issue 8 Pages
736-737
Published: 2003
Released on J-STAGE: July 21, 2003
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Metal complexes of a highly deformed 1,4,8,11,15,18,22,25-octaphenylphthalocyanine have been synthesized, and found to show various colors ranging from bright green, ocher, and red depending on the central metal employed.
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K. V. N. S. Srinivas, I. Mahender, Biswanath Das
2003 Volume 32 Issue 8 Pages
738-739
Published: 2003
Released on J-STAGE: July 21, 2003
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Under solvent free conditions, several aldehydes and ketones were efficiently and rapidly converted into the corresponding nitriles and amides respectively by treatment with hydroxylamine hydrochloride under microwave irradiation using silica chloride as catalyst. The yields of the products were very high and the time required for their preparation was very short compared to conventional heating experiments.
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Satyen Saha, Satoshi Hayashi, Akiko Kobayashi, Hiro-o Hamaguchi
2003 Volume 32 Issue 8 Pages
740-741
Published: 2003
Released on J-STAGE: July 21, 2003
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A single crystal of 1-butyl-3-methylimidazolium chloride [bmim]Cl, a prototype ionic liquid, has successfully been prepared and an X-ray crystallographic analysis has been performed. It reveals the presence of a hydrogen bonding network involving the chloride anion and the ring as well as the
n-butyl hydrogen atoms, a strong hydrophobic interaction between the two
n-butyl groups of the [bmim] cations, and a unique corrugated sheets structure of the imidazolium rings. Considering the similarity of the Raman spectra of crystalline and liquid states, we suspect that the three dimensional structure determined in the present study also exist, at least partially, in the ionic liquid state.
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Takaaki Hosoya, Hidehiro Uekusa, Yuji Ohashi, Takashi Ohhara, Hiroyuki ...
2003 Volume 32 Issue 8 Pages
742-743
Published: 2003
Released on J-STAGE: July 21, 2003
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The single-crystal neutron diffraction revealed that in the process of photo-induced β-thiolactam formation from
N,
N-dibenzyl-1-cyclohexenecarbothioamide a deuterium atom bonded to the benzyl carbon atom is transferred to the intramolecular cyclohexene carbon to occupy the equatorial position of the produced cyclohexyl ring.
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Neeraj Agarwal, Sarada P. Mishra, A. Kumar, M. Ravikanth
2003 Volume 32 Issue 8 Pages
744-745
Published: 2003
Released on J-STAGE: July 21, 2003
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β-Thiophene-substituted 21,23-dithiaporphyrins with substituents like methyl and phenyl groups were synthesized and characterized.
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Jin-Ti Wang, Yong Feng, Lei Liu, Xiao-Song Li, Qing-Xiang Guo
2003 Volume 32 Issue 8 Pages
746-747
Published: 2003
Released on J-STAGE: July 21, 2003
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Blue-shifted hydrogen bonds were found for F–He–H···Y (Y = N
2, CO, and He) systems where the proton-donor (He) was incapable of rehybridization. This finding indicated that rehybridization is not a generally applicable driving force for the blue shift.
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Sheng-Li Li, Jie-Ying Wu, Xuan-Jun Zhang, Yu-Peng Tian, Min-Hua Jiang, ...
2003 Volume 32 Issue 8 Pages
748-749
Published: 2003
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The title complex, {[N(CH
3)
4]
2[Cd(SCN)
2S]}
n, was prepared by self-assembling from the reaction of a methanol/water (volume ratio, 1/1) solution containing cadmium(II) thiocyanate with equivalent amount of tetramethylammonium thiocyanate. The result of single X-ray determination for the complex reveals that a novel polymeric cadmium(II) complex bridged by sulfur and thiocyanato ions was obtained, which formed a two-dimensional (2D) structure.
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Jianrong Qiu, Xiongwei Jiang, Congshan Zhu, Jinhai Si, Chengyu Li, Qia ...
2003 Volume 32 Issue 8 Pages
750-751
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Tb
3+-doped glass sample emits bright and long-lasting phosphorescence after irradiation by an 800-nm femtosecond pulsed laser. Long-lasting phosphorescence is observed once again after further excitation by 365-nm UV light when the femtosecond laser-induced long-lasting phosphorescence cannot be detected.
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Takashi Nishikata, Yasunori Yamamoto, Norio Miyaura
2003 Volume 32 Issue 8 Pages
752-753
Published: 2003
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Catalytic 1,4-addition of arylsiloxanes to enones was carried out at 75 °C in the presence of a dicationic palladium(II) catalyst in aqueous 1,4-dioxane. A nitrile-free complex generated in situ from Pd(dba)
2 and Cu(BF
4)
2 in the presence of dppe or dppben was recognized to be the best catalyst to achieve high yields for the representative enones and enals.
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Takabumi Nagai, Ikuko Takahashi, Tadatomi Nishikubo
2003 Volume 32 Issue 8 Pages
754-755
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New donor–acceptor norbornadiene derivatives (NBDs) were synthesized from Diels–Alder reaction of methoxyphenylpentamethylcyclopendadiene with acetylene derivatives containing electron-withdrawing groups. These NBD derivatives have absorption in the visible region and photoisomerized to give thermally stable quadricyclane derivatives (QCs) with fair durability.
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Hayato Tsurugi, Tsuneaki Yamagata, Kazuhide Tani, Kazushi Mashima
2003 Volume 32 Issue 8 Pages
756-757
Published: 2003
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Reaction of Zr(CH
2Ph)
4 (
1) with one equiv. of 2-(
N-aryliminomethyl)pyrrolyl ligands (
2a–
e) in toluene afforded two types of products, depending upon the bulkiness of the aryl moiety. The reactions of
1 with two equiv. of the most sterically bulky
2e afforded complex
5e, whose pseudo octahedral geometry around the zirconium atom and totally dissymmetric
cis-dibenzyl structure were elucidated. The high catalytic activity for ethylene polymerization was obtained by using complexes
3a and
3b.
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Kazuki Sada, Takahiro Sugimoto, Takahiro Tani, Yuuichi Tateishi, Tao Y ...
2003 Volume 32 Issue 8 Pages
758-759
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A novel supramolecular orthogonal joint via hydrogen bonds was constructed by a molecular complex between 2,6-bis(2-oxazolyl)pyridnes (pybox) and secondary dialkylammonium tetraphenylborates.
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Zhengquan Li, Yi Xie, Yujie Xiong, Rong Zhang, Wei He
2003 Volume 32 Issue 8 Pages
760-761
Published: 2003
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A reverse micelle-assisted route was reported to prepare ZnO nanorods from two different precursors, Zn(NH
3)
42+ and Zn(OH)
42−, respectively. The reverse micelles were used as microreactors, which lead into anisotropic growth of ZnO crystals during a simple solvothermal process.
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Qin-Yu Zhu, Yong Zhang, Jie Dai, Guo-Qing Bian, Ding-Xian Jia, Jia-She ...
2003 Volume 32 Issue 8 Pages
762-763
Published: 2003
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A new complex [Ag(L)
2]ClO
4·2CH
2Cl
2 (
1) (L = 4′, 5′-diaza-9′-(4,5-dimethylthio-1,3-dithiole-2-ylidene)fluorene) was synthesized. It was confirmed by
1H NMR and X-ray structure determination that when the molecules crystallize out from solution, a conversion of molecular configuration occurs because of the strong intermolecular interactions.
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Ryuta Fujii, Masashi Seki, Jun Shinoda, Noriyasu Okazaki, Akio Tada
2003 Volume 32 Issue 8 Pages
764-765
Published: 2003
Released on J-STAGE: July 28, 2003
JOURNAL
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The activity of Pt(0.5 wt%)/AlPO
4 for C
3H
6-SCR was found to be much higher than that of Pt(0.5 wt%)/Al
2O
3; although the selectivity toward N
2O of both the catalysts were comparable, the maximal conversion of NO to N
2 by Pt(0.5 wt%)/AlPO
4 was higher than that by Pt(0.5 wt%)/Al
2O
3, and moreover the temperature window of the former located in lower side than that of the latter. The superiority of Pt(0.5 wt%)/AlPO
4 was discussed on the basis of the results of XPS measurements.
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Yasushi Nakayama, Hideki Bando, Yoshiho Sonobe, Yasuhiko Suzuki, Terun ...
2003 Volume 32 Issue 8 Pages
766-767
Published: 2003
Released on J-STAGE: July 28, 2003
JOURNAL
RESTRICTED ACCESS
A new ethylene polymerization catalyst system containing a phenoxy-imine ligated V complex and a MgCl
2-based compound has been discovered. Unlike ordinary V-based catalysts, the system exhibits higher activities at elevated temperatures, and the activity reached a very high value of 65100 kg-PE/mol-cat/h at 75 °C, representing the first example of a highly active, thermally robust V-based ethylene polymerization catalyst system.
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