-
Bai-Wang Sun, Song Gao, Zhe-Ming Wang
2001 Volume 30 Issue 1 Pages
2-3
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The coordination polymer [Zn
3(Oac)
4(4,4′-bpy)
3{N(CN)
2}
2] is prepared and characterized by X-ray diffraction studies, which shows a unique three-leg molecular ladder structure.
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Masaaki Watanabe, Takayuki Hasegawa, Hiroyuki Miyake, Yoshitane Kojima
2001 Volume 30 Issue 1 Pages
4-5
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A europium(III) complex with a new chiral ligand,
N,N-bis[2-{
N-methyl((1
S)-1-carboxy-3-methyl)butylamino}ethyl]glycine,
is described as a new chiral shift reagent for α-amino acids and
N-acyl-oligopeptides in aqueous solutions without signal broadening on high resolution NMR spectroscopy. In addition, the molecular structure of lanthanum(III) complex with this ligand is revealed by X-ray crystallography.
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Takashi Kajiwara, Shuichi Yokozawa, Tasuku Ito, Nobuhiko Iki, Naoya Mo ...
2001 Volume 30 Issue 1 Pages
6-7
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Cobalt(II) and nickel(II) complexes with a tetraanionic ligand of
p-tert-butylsulfonylcalix[4]arene were synthesized and their X-ray structures show that the calixarene acts as a bis-tridentate dinucleating ligand with the 1,2-alternate conformation.
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Keisuke Hirano, Satoshi Minakata, Mitsuo Komatsu
2001 Volume 30 Issue 1 Pages
8-9
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Novel fluorophores, 3,4,6-triphenyl-α-pyrone derivatives, were synthesized and their spectroscopic properties have been investigated. In the solid state they show intense greenish-yellow fluorescence, but not in solution. It is concluded that the 6-phenyl group is fixed at an angle of about 26° to the pyrone plane in the solid state by molecular packing and this fixation is required for this unique fluorescent property.
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Ken-ichi Maruya, Koichiro Okumura, Teruaki Komiya
2001 Volume 30 Issue 1 Pages
10-11
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Acetic acid was selectively synthesized from syngas using zirconium hydroxide catalysts without precious metals.
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Kenji Wada, Koichi Yamada, Teruyuki Kondo, Take-aki Mitsudo
2001 Volume 30 Issue 1 Pages
12-13
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Ga–Si–O materials with acidic sites and uniformly-controlled micropores have been prepared by the calcination of a new gallium-bridged silsesquioxane [HNEt
3]
+[Ga{(Me
3Si)(
c-C
5H
9)
7Si
7O
12}
2]
−.
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Toshio Takayanagi, Shoji Motomizu
2001 Volume 30 Issue 1 Pages
14-15
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An equilibrium analysis method by capillary zone electrophoresis was utilized for the determination of acid dissociation constants of phenolphthalein, which is unstable in an alkaline aqueous solution. Apparent electrophoretic mobility of phenolphthalein increased with increasing pH of a migrating solution. Acid dissociation constants (p
Ka) of phenolphthalein were determined as 8.84 and 9.40 by applying a non-linear least-squares analysis to the mobility change.
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Itaru Hamachi, Noriyuki Kasagi, Shigeki Kiyonaka, Tsuyoshi Nagase, Yas ...
2001 Volume 30 Issue 1 Pages
16-17
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A palladium(II)(ethylenediamine) complex was found to selectively stabilize α-helix conformation of peptides having two histidine (His) residues at i and i + (3 or 4) positions, whereas the helix conformation of the other peptides having one or two His at different positions is destabilized.
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J. S. Yadav, B. V. Subba Reddy, Ch. Madhuri, G. Sabitha
2001 Volume 30 Issue 1 Pages
18-19
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Indium(III) chloride is found to catalyze efficiently the allylation of
gem-diacetates with allyltrimethylsilane at room temperature to afford the corresponding homoallylic acetates in high yields with good regioselectivity.
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Jun Sumaoka, Tomoyuki Igawa, Tatsunori Yagi, Makoto Komiyama
2001 Volume 30 Issue 1 Pages
20-21
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DNA hydrolysis by the Ce(IV)/EDTA complex is enormously accelerated by the cooperation with selected oligoamines. The reaction in the presence of ethylenediamine (100 mmol dm
−3) is 50 times as fast as that in its absence.
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Masaharu Tsuji, Takeshi Tanoue, Kousuke Nakano, Yukio Nishimura
2001 Volume 30 Issue 1 Pages
22-23
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Decomposition of CO
2 in a fast electric discharge flow of CO
2/He or CO
2/Ar mixtures was studied by observing UV and visible emission spectra. The decomposition efficiency of CO
2 in CO
2/Ar mixtures was higher than that in CO
2/He mixtures. More than 90% of CO
2 in CO
2/Ar mixtures was selectively decomposed into CO and O at a microwave power of 100-200 W, and CO
2 and Ar flow rates of 25 and 1000 sccm, respectively, at a total pressure of 0.5 Torr.
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Andrey I. Tsyganok, Kunio Suzuki, Satoshi Hamakawa, Katsuomi Takehira, ...
2001 Volume 30 Issue 1 Pages
24-25
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Coprecipitation reaction of Mg
2+ and Al
3+ with pre-formed [Ni(edta)]
2− complex (H
4edta = ethylenediaminetetraacetic acid) gives rise to a new layered double hydroxide phase.
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Hajime Matsumoto, Toshihiko Matsuda, Tetsuya Tsuda, Rika Hagiwara, Yas ...
2001 Volume 30 Issue 1 Pages
26-27
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The effect of the viscosity of room temperature molten salt (RTMS) electrolyte has been investigated on the performance of dye-sensitized solar cell (DSSC). Both the short circuit photocurrent and conversion efficiency are increased with decreasing the viscosity of RTMS as in the case of conventional electrolytes. The conversion efficiency of 2.1% observed for the cell of EMIm-F·2.3HF is the highest value reported for all the DSSC consisted of RTMS.
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Joon-Seok Min, Makoto Misono, Akira Taguchi, Noritaka Mizuno
2001 Volume 30 Issue 1 Pages
28-29
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Cesium hydrogen salt of mono-iron-substituted phosphoundecamolybdate, Cs
2.8H
1.2Pmo
11FeO
39, was synthesized and the catalyst showed intrinsically higher selectivity to acetone for the title reaction compared with the iron-impregnated Fe
3+(1.2–5.0 wt%)/Cs
3.0Pmo
12O
40.
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Koichiro Jitsukawa, Tsuyoshi Irisa, Hisahiko Einaga, Hideki Masuda
2001 Volume 30 Issue 1 Pages
30-31
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A substrate-specific α-hydroxylation of dipeptides has been found out as a functional model for peptidylglycine α-hydroxylating monooxygenase (PHM), in the reaction of the Co(III) ternary complexes containing terpyridine and dipeptide ligands under aerobic and slightly alkaline conditions.
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Tadashi Sugano
2001 Volume 30 Issue 1 Pages
32-33
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From the measurements of the temperature dependence of magnetization, a magnetic phase transition at 145 K with a thermal hysteresis is found for an organic radical 5-carboxy-2-thienyl nitronyl nitroxide. Ferromagnetic intermolecular interaction is observed in the high-temperature phase while antiferromagnetic interaction is obtained for the low-temperature phase.
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Hiroki Hayashi, Seiichiro Murata, Teruoki Tago, Masahiro Kishida, Kats ...
2001 Volume 30 Issue 1 Pages
34-35
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The catalytic activity and durability of methane-steam reforming under a low H
2O/CH
4 molar ratio was studied on an Ni/Al
2O
3 catalyst prepared using water-in-oil (w/o) microemulsion. The initial activity of the prepared Ni/Al
2O
3 catalyst was higher than that of an impregnated one. The impregnated catalyst deactivated rapidly and lost its activity at a time-on-stream of 15 h due to severe coking (> 30 wt%-carbon after 20 h). In contrast, the catalyst prepared using w/o microemulsion sustained its activity for 40 h, and gave little coke (<0.3 wt%-carbon after 40 h) on the catalyst.
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Kotohiro Nomura, Asami Sagara, Yukio Imanishi
2001 Volume 30 Issue 1 Pages
36-37
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VCl
2(N-2, 6-Me
2C
6H
3)(O-2, 6-
iPr
2C
6H
3) - methylaluminoxane catalyst has exhibited remarkable catalytic activity for ethylene polymerization. High molecular weight ring-opened poly(norbornene) has been prepared in the presence of V(CH
2Ph)
2(N-2, 6-Me
2C
6H
3)(O-2, 6-
iPr
2C
6H
3).
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Takayuki Sumida, Yuji Wada, Takayuki Kitamura, Shozo Yanagida
2001 Volume 30 Issue 1 Pages
38-39
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Highly ordered macroporous ZnO films were electrodeposited using polystyrene colloidal crystals as templates. The films prepared at −1.0 V vs Ag/AgCl had the long-range order of pores reflecting the templates.
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Akihiro Orita, Katsumasa Sakamoto, Hiroshi Ikeda, Jiannan Xiang, Junzo ...
2001 Volume 30 Issue 1 Pages
40-41
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Treatment of Bu
2SnO (2 equiv) with triflic acid (TfOH) in dry acetone gives [(TfO)Bu
2SnOSnBu
2(OH)]
n (
1) that is proved to possess a unique sheet-like structure on the basis of X-ray crystallography.
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Takahiro Sasamori, Yoshimitsu Arai, Nobuhiro Takeda, Renji Okazaki, No ...
2001 Volume 30 Issue 1 Pages
42-43
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Deselenation of a 1,3,5-triselena-2,4,6-tristibane bearing 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (denoted as Tbt) groups in the presence of 1,3-butadienes resulted in the formation of the corresponding [1 + 4]-cycloadducts of a sterically hindered stibinidene (Tbt-Sb:), a monovalent species of antimony. Thermal generation of the stibinidene from the stibolene derivatives via retro [1 + 4]-cycloaddition reaction was suggested by the diene-exchange reaction in thermolysis of the adducts in the presence of another butadiene derivative.
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Akira Shichi, Atsushi Satsuma, Tadashi Hattori
2001 Volume 30 Issue 1 Pages
44-45
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The presence of water vapor was found to remarkably enhance the catalytic activity for selective reduction of NO by C
3H
8 over Co
2+-exchanged MFI zeolite prepared from H-form MFI zeolite.
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Yu Zhang, Xin Wang, Degang Fu, Juzheng Liu, Yiping Cui, Zuhong Lu
2001 Volume 30 Issue 1 Pages
46-47
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The first-order hyperpolarizability β values of two kinds of CdS nanoparticles with different surfaces were experimentally determined in solution via an incoherent hyper-Rayleigh scattering (HRS) technique. It is found that the β value of CdS nanoparticles capped with 2, 2′-bipyridine is 4.27 × 10
−27 esu which is about a factor of 3 smaller than the β value (1.30 × 10
−26 esu) of bare CdS nanoparticles whose surface is not modified by organic groups. This difference is interpreted in terms of a two-level model approximation derived from molecular chromophores, when considering the contribution of molecule-like scatterers at the particle surfaces.
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Shouhai Gao, Wei Wang, Binghe Wang
2001 Volume 30 Issue 1 Pages
48-49
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A new OsO
4-mediated carbon–carbon bond cleavage reaction leading to the formation of anthraquinone was observed. The reaction goes through the dihydroxylated intermediate and is aided by the presence of pyridine.
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Keiichi Adachi, Satoshi Kawata, Md. Khayrul Kabir, Hitoshi Kumagai, Ka ...
2001 Volume 30 Issue 1 Pages
50-51
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The crystal structures and magnetic properties of two-dimensional coordination polymers [M(tdpd)(H
2O)
2]
n (M = Mn
2+ and Co
2+) involving the triangular lattice are determined. The magnetic behaviors of
1 and
2 may come from the single-ion behavior and the specific arrangement of the metal ions.
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Kikujiro Ishii, Takahiro Okamura, Nami Ishikawa, Hideyuki Nakayama
2001 Volume 30 Issue 1 Pages
52-53
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By the continuous elevation of temperature, ethylbenzene in the supercooled liquid state first turns opaque and then becomes transparent again before it finally crystallizes. These observations are possibly related to the appearance of the second amorphous state with a correlated structure that has recently been reported for triphenyl phosphite.
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Song Cao, Xuhong Qian, Gonghua Song, Xiayu Huang
2001 Volume 30 Issue 1 Pages
54-55
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A novel and simple protocol: the direct amination of 4,5-dichloropyridazinones can be carried out in hydrazine hydrate under mild conditions. 4-Chloro-5-hydrazinopyridazin-3-ones serves as a key intermediate in this reduction.
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Toshihiro Yamase, Bogdan Botar, Eri Ishikawa, Keisuke Fukaya
2001 Volume 30 Issue 1 Pages
56-57
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The crystal structure determination of tris(vanadyl)-substituted tungstoantimonate(III) K
11H[(VO)
3(SbW
9O
33)
2]·27H
2O reveals that the [(VO)
3(SbW
9O
33)
2]
12− anion contains three exterior VO
2+ groups sandwiched by two α-B [SbW
9O
33]
9− ligands in V
IV···V
IV separation of 5.411(8)-5.464(8) Å and is stabilized by equatorial three K
+ ions triangle with virtual
D3h symmetry. An observable spin-exchange interaction between V
IV centers within the vanadyl coplanar triangle is demonstrated in terms of S = 1/2 and S = 3/2 states.
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Hiroaki Kawamura, Katsuhiro Maeda, Yoshio Okamoto, Eiji Yashima
2001 Volume 30 Issue 1 Pages
58-59
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Poly[(4-dihydroxyborophenyl)acetylene] was found to form a predominantly one-handed helical conformation upon complexation with various nucleosides and (oligo)nucleotides, and the complexes exhibited characteristic, split-type induced circular dichroisms depending on the nucleobases.
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1,2,3,4,5,6,7-Hexathiagermepanes: Synthesis, Structures, and the Ring Contraction to 1,2,3,4,5-Tetrathiagermolanes
Tsuyoshi Matsumoto, Yosuke Matsui, Yukiko Nakaya, Kazuyuki Tatsumi
2001 Volume 30 Issue 1 Pages
60-61
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The first 1,2,3,4,5,6,7-hexathiagermepanes Dmp(Ar)GeS
6 [Dmp=2,6-dimesitylphenyl, Ar = Mes, Dep (2,6-diethylphenyl), Tip (2,4,6-triisopropylphenyl)] were synthesized along with 1,2,3,4,5-tetrathiagermolanes by sulfurization of the corresponding dihydrogermanes. The hexathiagermepane Dmp(Tip)GeS
6 slowly converted to the tetrathiagermolane with release of elemental sulfur owing to the steric hindrance.
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Kazuo Kasatani, Masahiro Kawasaki, Hiroyasu Sato
2001 Volume 30 Issue 1 Pages
62-63
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Two-photon C
1B
2(n, 4s) ← X
1A
1 absorption of methanethial (thioformaldehyde) H
2CS has been probed by (2+2) resonance enhanced multiphoton ionization spectroscopy (REMPI) for the first time. The REMPI spectrum has a well developed rotational structure with O, P, Q, R, and S branches, which has been simulated using rotational constants reported by Moule and co-workers.
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Yiya Peng, Zhaoyu Meng, Chang Zhong, Jun Lu, Zhiping Yang, Yitai Qian
2001 Volume 30 Issue 1 Pages
64-65
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Nanocrystalline WS
2 was prepared by the reaction of elemental sulfur and sodium tungstate (or calcium tungstate) in an aluminum chloride molten-salt. XPS, XRD and TEM indicated that the product was 2H-WS
2 nanoparticles with size of 20-50 nm and irregular morphology.
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Naoya Morohashi, Nobuhiko Iki, Sotaro Miyano, Takashi Kajiwara, Tasuku ...
2001 Volume 30 Issue 1 Pages
66-67
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Single-crystal X-ray analysis has shown that
p-tert-butylsulfinylcalix[4]arene (H
4L) can bind Pd
2+ ion by using either S or O atoms of bridging S=O groups in addition to phenolic oxygen atoms to form in [Pd
2(H
2L)(H
3L)
2] complex.
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Robert West, Thomas A. Schmedake, Michael Haaf, James Becker, Thomas M ...
2001 Volume 30 Issue 1 Pages
68-69
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The stable silylene,
N,N′-di-
t-butyl-1,3-diaza-2-sila-2-ylidene, is reduced by Na/K or C
8K first to a disilanyl dianion and then to a silyl dianion. Both of these species can be derivatized by reaction with hydroxy compounds or with chlorotrimethylsilane.
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Masato Fukudome, Kazushi Kamiyama, Tsuyoshi Kawai, Masahiro Irie
2001 Volume 30 Issue 1 Pages
70-71
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1,2-Bis(2,4-dimethyl-5-phenyl-3-thienyl)perfluorocyclopentene was found to form an amorphous state in bulk by introducing diphenylamino substituents at both ends of the molecule. The glass transition temperature was as high as 103 °C. The amorphous film exhibited reversible color and refractive index changes by alternate irradiation with ultraviolet and visible light.
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Jun-ichiro Setsune, Kenji Kashihara, Ken-ichi Wada
2001 Volume 30 Issue 1 Pages
72-73
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Antiaromatic isophlorin with
N21,N22-(1,2-diphenyletheno) and
N23,N24-(carboethoxymethano) double bridge was dioxygenated at the C
meso–C
pyrrole-α double bond of the dipyrrylmethene moiety having the
N21,N22-(1,2-diphenyletheno)-bridge, leading to an isobilirubin derivative that was characterized by X-ray crystallography.
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Kazuo Eda
2001 Volume 30 Issue 1 Pages
74-75
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The amorphous nature of molybdenum giant clusters (molybdenum blue species) was used to prepare compositionally well-arranged precursors (homogeneous amorphous phase), which are suitable for lower temperature syntheses of alkali-metal molybdenum oxide bronzes. Then, it was confirmed that soluble giant clusters such as molybdenum blue species afforded very attractive merits for materials syntheses.
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Yasuyuki Soeda, Kazunobu Toshima, Shuichi Matsumura
2001 Volume 30 Issue 1 Pages
76-77
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Glycidol polymerized by the microbial resting cells and commercially available hydrolase enzyme having epoxide hydrolase activity without added water produced the water-soluble poly(glycidol). As a typical example, a mixture of glycidol and 5% lipase AK
(Pseudomonas fluorescens) was stirred at 30 °C for 3 d to produce the poly(glycidol) with a weight-average molecular weight of 900.
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Subbian Karuppuchamy, Dinesh P. Amalnerkar, Koichi Yamaguchi, Tsukasa ...
2001 Volume 30 Issue 1 Pages
78-79
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A convenient – and quick to realize – approach for cathodic electrodeposition of TiO
2 films is suggested. Scanning electron microscopic examination of the resultant films reveals the formation of mesoporous TiO
2. Since dye-sensitized photoelectrochemical investigations on cathodically electrodeposited TiO
2 films are hitherto unreported, we performed such investigations by sensitizing our mesoporous TiO
2 films with
cis-bis(4,4′-dicarboxy-2,2′-bipyridine)bis(thiocyanato)ruthenium(II). The preliminary studies exhibit incident photon-to-current conversion efficiency (IPCE) above 35% in the first attempt.
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Seung-Taek Myung, Shinichi Komaba, Naoaki Kumagai
2001 Volume 30 Issue 1 Pages
80-81
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An orthorhombic LiMnO
2 having a high capacity was hydrothermally synthesized at 170 °C from Mn
3O
4 obtained through autoxidation route. The LiMnO
2/Li cell demonstrated the initial reversible capacities of about 210 mAh (g-oxide)
−1 at 30 °C. After several initial cycling, the cell showed stabilized cycling behavior (175 mAh g
−1 at the 30th cycle). We believe that orthorhombic LiMnO
2 prepared by a new hydrothermal condition is an excellent candidate for the cathode of coming generation of high capacity material to be applied for lithium-ion secondary battery.
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Yasuo Saitoh, Makoto Kaneko, Katsunori Segawa, Hiroki Itoh, Hirochika ...
2001 Volume 30 Issue 1 Pages
82-83
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9-Anthroyloxyl radicals are generated from photocleavage of the N-O bond of
N-(9-anthroyloxy)-9-fluorenylideneamine and 1-(9-anthroyloxy)-2-pyridone in acetonitrile. They are much less reactive in decarboxylation, addition to olefins, and hydrogen-atom abstraction than benzoyloxyl and 1-naphthoyloxyl radicals, and supposedly undergo intramolecular addition to the ipso position to give α-lactonic spiroanthracenyl radicals.
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Ramaswamy Murugavel, Malaichamy Sathiyendiran
2001 Volume 30 Issue 1 Pages
84-85
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Octahedral Mn(II) and Cu(II) di
-tert-butylphosphate (L) complexes [ML
2(imz)
4] have been synthesized and characterized using IR, UV-vis, luminescence, and EPR spectroscopy and single crystal X-ray diffraction studies. Thermal decomposition of both the complexes (probed by TGA, DTA, and DSC) indicate stepwise elimination of
iso-butene, imidazole and water to finally yield the respective ceramic materials Mn(PO
3)
2 or Cu(PO
3)
2.
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Jun-ichi Yamada, Takashi Mangetsu, Hiroki Akutsu, Shin’ichi Naka ...
2001 Volume 30 Issue 1 Pages
86-87
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The synthesis of the dichalcogenane derivatives of MET, (1,3-dioxan-2-yl)methylenedithio(ethylenedithio)tetrathiafulvalene (DOA-MET) and (1,3-dithian-2-yl)methylenedithio(ethylenedithio)tetrathiafulvalene (DTA-MET), and the preparation of their charge-transfer (CT) materials are investigated to explore new organic metals. The resulting (DOA-MET)
3AuI
2 salt exhibits weak metallic conducting behavior, and has screwed donor stacks.
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Hyun-Seog Roh, Wen-Sheng Dong, Ki-Won Jun, Sang-Eon Park
2001 Volume 30 Issue 1 Pages
88-89
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A novel catalyst, Ni/Ce-ZrO
2 exhibits very high catalytic activity and stability in partial oxidation of methane to synthesis gas. It gives 99.6% CH
4 conversion at 850 °C and the activity was maintained for 100 h.
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Toshikazu Kawaguchi, Katsuaki Shimazu
2001 Volume 30 Issue 1 Pages
90-91
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The mixed aminoethanethiol/octadecanethiol monolayers, the surface composition of which was predetermined by the initial coverage of Pb underpotentially deposited on a bare gold electrode during the first step of the preparation, were constructed.
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