-
Atsuhiro Fujimori, Hiroo Nakahara
2003 Volume 32 Issue 1 Pages
2-3
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From observations of the atomic and friction force microscopies, it has been found that the mixed monolayers of the comb polymer having the fluorocarbon side-chains and the hydrogenated amphiphile, exhibit a characteristic phase separation behavior at the micro- and mesoscopic resolutions. The regularity for molecular orientation in the mixed film was compared with that in the pure monolayer of the fluorinated comb polymer by using polarized NEXAFS spectroscopy.
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Yukio Masaki, Hideki Arasaki, Masashi Iwata
2003 Volume 32 Issue 1 Pages
4-5
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Chiral tertiary dichloromethylcarbinol derivatives, prepared by stereospecific α C–H insertion reaction of dichlorocarbene with protected chiral secondary alcohols, were converted into intermediary α-chloroepoxides which gave stereospecifically chiral quaternary carbon compounds, α-aminoacids via α-azide-aldehydes and α-cyanoacetic acids through cyanation, respectively. The fashion generating the quaternary centers from dichloromethylcarbinols via α-chloroepoxides was proved to be quite different depending on the substrates: inversion of configuration of non-benzylic substrates and apparent retention with benzylic one.
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Kin-ya Tomizaki, Hidekazu Nishino, Toru Arai, Tamaki Kato, Norikazu Ni ...
2003 Volume 32 Issue 1 Pages
6-7
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Polypeptide containing iron porphyrin and flavin showed aniline-hydroxylation activity in the presence of 1-benzyl-1,4-dihydronicotinamide and O
2. The increased activity at pH 5.5 compared with that at pH 7.0 suggests that the dissociation of His from the iron porphyrin favored the hydroxylation.
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Yoshihiro Itoh, Kenji Yamamoto, Hirofusa Shirai
2003 Volume 32 Issue 1 Pages
8-9
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Upon UV irradiation, a benzyl-containing cationic surfactant,
p-dodecylbenzyltrimethylammonium bromide, has been converted to a nonsurfactant, which can be separated from the aqueous solution by coprecipitation with CaSO
4.
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Sheng Ye, Xingguo Liang, Yoji Yamamoto, Makoto Komiyama
2003 Volume 32 Issue 1 Pages
10-11
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By treating single-stranded DNA with nuclease S1 in the presence of peptide nucleic acid (PNA), oligonucleotides of predetermined size were successfully obtained. Mass spectroscopy on these fragments concretely substantiated alteration of one nucleotide to another, if any, in the DNA.
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Shin-ichiro Kawano, Norifumi Fujita, Kjeld J. C. van Bommel, Seiji Shi ...
2003 Volume 32 Issue 1 Pages
12-13
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New cholesterol-based gelators bearing a 4-, 3-, or 2-pyridyl group (
1,
2, or
3, respectively) have been designed. Compound
1 gelled 16 of the 19 solvents tested, indicating that
1 acts as a very versatile gelator. The gelation ability of compound
2 was significantly improved by added AgOTf, owing to an Ag(I)-pyridine interaction. The findings indicate that the pyridyl group is very useful to impart new functions to organogel systems.
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Hiroyuki Sakaba, Takahiro Yumoto, Sanae Watanabe, Chizuko Kabuto, Kuni ...
2003 Volume 32 Issue 1 Pages
14-15
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The reactions of
cis-Cp
∗W(CO)
2(MeCN)Me (
1) with thiophene or 3-methylthiophene resulted in selective α-C–H bond activation to give
cis-Cp
∗W(CO)
2(MeCN)R [R = 2-C
4H
3S (
2a), 2-C
4H
2S-4-Me (
2b)].
2a reacted with 3-methylthiophene to afford thienyl exchange products
2b and thiophene in addition to decomposition products. Reversibility of the exchange reaction was shown by the reaction of
2b with thiophene.
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Noriyuki Suzuki, Yoshiyuki Fukuda, Chae Eun Kim, Hidemichi Takahara, M ...
2003 Volume 32 Issue 1 Pages
16-17
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The 1,4-disubstituted butatrienes, (
Z)-R-CH=C=C=CH-R (
1, R = SiMe
3,
t-Bu), reacted with RhCl(PAr
3)
3 (Ar = Ph,
p-tolyl) to give rhodium-(
Z)-butatriene complexes
3. The butatrienes coordinated to Rh with the central double bond in an η
2-fashion. (
Z)-Butatrienes on
3 isomerized to (
E)-form at 70 °C to afford (
E)-butatriene complexes
4 with excellent
E/
Z ratios (
E/
Z = 97/3–99/1). The molecular structure of
4b (R = SiMe
3, Ar =
p-tolyl) was determined by X-ray diffraction analysis. Hydrosilation of
1 was catalyzed by rhodium complexes to give allenes as major products accompanied by 1,3-dienes as minor ones, which are results of 2,1-addition and 2,3-
anti-addition of the silane.
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Akira Harada, Hiroyasu Yamaguchi, Kaori Tsubouchi, Eri Horita
2003 Volume 32 Issue 1 Pages
18-19
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A novel antibody supramolecule was designed and prepared by using immunoglobulin M (IgM) as a core and chemically modified IgGs as branches. The dendritic supramolecules were composed by proteins with molecular weight of about 2 million and constructed by non-covalent bonds. They could bind antigens strongly with high specificity.
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Akihisa Hamazawa, Toshihiro Yano, Takanori Nishioka, Isamu Kinoshita, ...
2003 Volume 32 Issue 1 Pages
20-21
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Chirality has been introduced to a metalloporphyrin by a new approach that involves coordination to the metal of a pendant arm, with the preferred conformation adopted by the resulting chelate ring causing the
meso-phenyl group to which the arm is attached to twist and thereby introduce chirality to the remote, open face of the metalloporphyrin.
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Taichi Shintou, Wataru Kikuchi, Teruaki Mukaiyama
2003 Volume 32 Issue 1 Pages
22-23
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Various alkyl phenyl ethers were obtained in high yields by way of oxidation-reduction condensation where alkoxydiphenylphosphine, prepared easily from chlorodiphenylphosphine and corresponding alcohols, was treated with various phenols in the co-existence of 2,6-dimethyl-1,4-benzoquinone(DMBQ) under mild conditions.
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Teruyuki Kondo, Fumiaki Tsunawaki, Ryosuke Sato, Yasuyuki Ura, Kenji W ...
2003 Volume 32 Issue 1 Pages
24-25
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Treatment of 2-phenyl-5-hexen-2-ol (
1a) with Ru
3(CO)
12 catalyst and PPh
3 ligand in the presence of allyl acetate and K
2CO
3 in toluene at 160 °C for 20 h under 5 atm of carbon monoxide gave the corresponding oxidative cyclization product, 2,5-dimethyl-2-phenyl-2,3-dihydrofuran (
2a), in quantitative yield (>99%).
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Sakae Takenaka, Yukio Shigeta, Kiyoshi Otsuka
2003 Volume 32 Issue 1 Pages
26-27
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The supported (Ni–Pd) catalysts showed high activity and long life for methane decomposition to form hydrogen and carbon nanofibers of a unique structure.
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Kazuharu Suzuki, Makoto Yamaguchi, Mikio Kumagai, Shozo Yanagida
2003 Volume 32 Issue 1 Pages
28-29
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In order to search for an efficient counter electrode in a dye-sensitized solar cells, three kinds of nano-carbon materials were examined. When single wall carbon nanotubes (SWCNTs) were used as a carbon electrode, the conversion efficiency of the cells is 4.5%. This value is comparable to Grätzel-type dye-sensitized solar cell (counter electrode: platiun-suputtered fluorine-doped tin oxide) under the same experimental condition.
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Jun Lu, Yan Zhao, Nan Chen, Yi Xie
2003 Volume 32 Issue 1 Pages
30-31
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A novel and simple route, called in situ template-controlled (ISTC) method, has been developed to fabricate low-dimensional CuS nanorods by firstly taking advantages of TMLC’s semi-ordered arrangement.
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Mitsuharu Noto, Yasuyuki Goto, Masanao Era
2003 Volume 32 Issue 1 Pages
32-33
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Green electrophosphorescence from a tetrameric copper (I)-amide cluster [CuN(Si(CH
3)
3)
2]
4 was successfully observed in the heterostructure device combined with organic carrier transport materials and the copper cluster (peak wavelength = 493 nm, and max. luminance = 400 cdm
−2 at a current density of 177 mA cm
−2 at a drive voltage of 22 V).
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Tetsushi Ohmura, Wasuke Mori, Mari Hasegawa, Tohru Takei, Akira Yoshiz ...
2003 Volume 32 Issue 1 Pages
34-35
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Mononuclear copper(II) terephthalate-pyridine, which has a regular one-dimensional structure, occludes large amounts of gases. The maximum amount of N
2 gas that can be occluded by mononuclear copper(II) terephthalate-pyridine is 1.1 mole per mole of copper(II) salt, indicating the presence of a large number of micropores. A porous structure, which is formed by hydrogen bonding and self-assembly of the linear copper(II) terephthalate-pyridine, was determined by X-ray crystallography.
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Dongjun Wang, Chenbin Gu, Yongguo Zhou, Xinqiu Wang, Zhen Zhen, Fangqi ...
2003 Volume 32 Issue 1 Pages
36-37
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Well-defined PMMA microspheres have been synthesized in TEOS under static condition by one step, the formation and size control of the microspheres are discussed.
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Athanasios B. Bourlinos, Michael A. Karakassides, Dimitrios Gournis, V ...
2003 Volume 32 Issue 1 Pages
38-39
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Solid state treatment of an MCM-41 hybrid with molten iron(III) and chromium(III) salts, afforded the corresponding metal-containing MCM-41 materials free of the organic template and with high metal contents and thermal stability.
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Nam Choul Yang, Jae Kyun Jeong, Dong Hack Suh
2003 Volume 32 Issue 1 Pages
40-41
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A new conjugated alternative copolymer based on 2,6-bis(1,3,4-oxadiazol-2-yl)pyridine and 9,9-dialkylfluorene in a main chain showed strong blue fluorescence with band maxima at 389 nm and 405 nm in the 1,2-dichloroethane solution and posessed sensitivity to various metal ions such as Ni
2+ and Fe
3+ as a fluorescence-mode chemosensor.
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Xiao-Shui Wang, Noriyasu Okazaki, Tsutomu Suzuki, Masamitsu Funaoka
2003 Volume 32 Issue 1 Pages
42-43
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Char with turbostratic structure of carbon (T-component) that could afford a practical electromagnetic shielding capacity at 50–800 MHz was produced from lignocresol added with nickel and calcium by its carbonization at 900 °C, although the addition of nickel alone gave amorphous carbon. This lignin char exceeded the corresponding char obtained from acid-demineralized alkali lignin in the shielding capacity. The formation of T-component can be accounted for by the promotion action of calcium to prevent nickel catalyst from agglomeration.
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Hajime Irikawa, Masanori Morinaga, Mitsuru Kondo
2003 Volume 32 Issue 1 Pages
44-45
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The title
L-tryptophan derivative was found to serve as a chiral host and the formation of a helical network with one-dimensional channel was shown by the X-ray analysis of its inclusion complex with (
R)-
s-butyl chloride.
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Fushe Han, Minoru Hayashi, Yutaka Watanabe
2003 Volume 32 Issue 1 Pages
46-47
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Dipalmitoylphosphatidylinositol 4,5-bisphosphate was conveniently synthesized via the regioselective phosphorylation of
L-1,2-
O-cyclohexylidene-5,6-di-
O-(
o-xylylene phosphoryl)-
myo-inositol derived from 1,2-
O-cyclohexylidene-3,4-
O-(tetraisopropyldisiloxane-1,3-diyl)-
myo-inositol.
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Qi Feng, Koji Kajiyoshi, Kazumichi Yanagisawa
2003 Volume 32 Issue 1 Pages
48-49
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A layered titanate H
1.08Ti
1.73O
4 oriented thin film on stainless steel and Ti metal substrates was prepared by using an exfoliation-restacking technique. The layered titanate film can be topotactically transformed to anatase and rutile thin films with preferred orientation along [103] and [110] directions, respectively, by heat-treatment, and to a BaTiO
3 thin film with preferred orientation along [110] direction by hydrothermal treatment in a Ba(OH)
2 solution.
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Chun-Kai Shi, Le-Fu Yang, Jun-Xiu Cai
2003 Volume 32 Issue 1 Pages
50-51
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High catalytic activity and thermal/hydrothermal stability in the course of the low-temperature methane combustion were characteristics of the Pd–Ce/HZSM-5 catalyst, which was easily prepared by an impregnation method.
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Susumu Kuwabata, Hidefumi Hasegawa, Kenji Kano
2003 Volume 32 Issue 1 Pages
52-53
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Application of the ac impedance technique to the electrochemical glucose sensing allowed determination of glucose concentration without influence of a serious interference material, ascorbic acid.
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Takaaki Nakagawa, Seiya Tsujimura, Kenji Kano, Tokuji Ikeda
2003 Volume 32 Issue 1 Pages
54-55
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An enzyme-modified electrode was prepared producing a diffusion-limited bioelectrocatalytic current for the reduction of O
2 to water at neutral pH and at ambient temperature. The electrode used bilirubin oxidase as an enzyme and [Fe(CN)
6]
3−/4− as a mediator, both of which were immobilized on the surface of a glassy carbon electrode by electrostatic entrapment with poly-
L-lysine.
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Teruaki Mukaiyama, Takashi Nakagawa, Hidehiko Fujisawa
2003 Volume 32 Issue 1 Pages
56-57
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Catalytic Michael reaction between trimethylsilyl enolates and α,β-unsaturated carbonyl compounds by using a Lewis base such as lithium benzamide or lithium succimide in a DMF solvent proceeded smoothly to afford the corresponding Michael adducts.
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Keisuke Iwai, Takayoshi Yamauchi, Keiji Hashimoto, Tomoo Mizugaki, Koh ...
2003 Volume 32 Issue 1 Pages
58-59
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2,6-Di-
tert-butylphenol is selectively transformed to 3,3′,5,5′-tetra-
tert-butyl-4,4′-diphenoquinone in the presence of molecular oxygen using alkali-promoted Cu–Mg–Al hydrotalcites as recyclable heterogeneous catalysts.
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Yoshinori Arachi, Hironori Kobayashi, Shuichi Emura, Yoshiyuki Nakata, ...
2003 Volume 32 Issue 1 Pages
60-61
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Synchrotron X-ray diffraction and XAFS measurement have been employed to investigate structural change and the charging process of a layered LiNi
0.5Mn
0.5O
2 cathode material. The structure of charged Li
1−xNi
0.5Mn
0.5O
2 (
x=0.5), which corresponds to the composition for showing rechargeable capacity, was determined. The results showed that divalent nickel metal was oxidized to trivalent after charging, in association with the phase transition from hexagonal (
R3-
m) to monoclinic (
C2/
m) resulting from the ordering of cations in the layered structure.
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Yoshiki Ozawa, Madoka Terashima, Minoru Mitsumi, Koshiro Toriumi, Nobu ...
2003 Volume 32 Issue 1 Pages
62-63
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Molecular distortion of a photoexcited diplatinum(II) complex in a single crystal has been directly observed by accurate synchrotron radiation diffraction studies. Photoexcited crystallographic analysis has revealed that a small portion of [Pt
2(pop)
4]
4− (pop = H
2O
5P
22−) complex shows the Pt–Pt bond shrinkage of 0.23 Å under blue laser irradiation.
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Shigenori Matsushima, Hiroyuki Nakamura, Masao Arai, Kenkichiro Kobaya ...
2003 Volume 32 Issue 1 Pages
64-65
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From a first-principles band calculation, InTaO
4 is predicted to be an indirect-gap material, because the valence band maximum (VBM) is located in the middle point on the ZD line and the conduction band minimum (CBM) in the middle point on the DX line. The valence band with the width ca. 6.0 eV is mainly constructed from O 2p orbitals hybridized with In4d5s5p and Ta5d orbitals, whereas the lower conduction band is constructed from Ta5d orbitals.
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Yasutaka Kataoka, Tatsuya Nakamura, Kazuhide Tani
2003 Volume 32 Issue 1 Pages
66-67
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Reaction of (cod)PtMe
2 with 1 equiv and 2 equiv of the PN ligand (PN =
o-Ph
2PC
6H
4CH
2OCH
2C
5H
4N-2) (
1) gave
cis-(PN-κ
P:κ
N)PtMe
2 (
2) and
cis-(PN-κ
P)
2PtMe
2 (
3) respectively. The complex
2 underwent activation of the benzylic C–H bond in toluene at 110 °C to afford (PCN-κ
P:κ
C:κ
N)PtMe (
4). Toluene solution of
3 was refluxed for 42 h in the presence of 2 equiv of the PN ligand to afford the C–O bond cleavage product
cis-(PN-κ
P)(Ph
2PC
6H
4CH
2-κ
P:κ
C)PtMe (
cis-
5) along with
cis-(PN-κ
P)(PCN-κ
P:κ
C)PtMe (
cis-
6).
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Asako Yoshida, Akitomo Harada, Tadashi Mizushima, Shigeru Murata
2003 Volume 32 Issue 1 Pages
68-69
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An electron transport from an electron donor entrapped into inner waterpool to an electron acceptor in outer aqueous solution across vesicle bilayers was sensitized by pyrene derivatives incorporated in the vesicle walls, although the sensitizer ability was very dependent on the substituent group on the pyrenyl ring. The newly designed pyrenes having both a hydrophilic group linked by short methylene chain and a hydrophobic long alkyl group were found to act as excellent sensitizers.
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Takeshi Ishiyama, Tsutomu Mizuta, Katsuhiko Miyoshi, Hiroshi Nakazawa
2003 Volume 32 Issue 1 Pages
70-71
Published: 2003
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The reaction of [{η
5-C
5H
4(CH
2)
2P(H)Mes-κ
P}ZrCl
3(tht)] (
1; Mes = 2,4,6-trimethylphenyl; tht = tetrahydrothiophene) with 1 equiv of NaCPh
3, followed by treatment with
N-methylimidazole gave a novel phosphide-pendant dichloride complex [{η
5-C
5H
4(CH
2)
2PMes-κ
P}ZrCl
2(
N-methylimidazole)
2] (
4) with liberation of HCPh
3. The product (
4) is the first dichloride terminal phosphide Zr complex characterized by X-ray crystallographic analysis.
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Teruyuki Nakato, Hiroyuki Miyashita, Shigetaka Yakabe
2003 Volume 32 Issue 1 Pages
72-73
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Intercalation compounds of layered niobate K
4Nb
6O
17 with organoammonium ions adsorbed 2,4-dicholorophenol and phenol dissolved in water. Their adsorption properties were greatly influenced by the organoammonium species pre-intercalated; modification by dioctadecyldimethylammonium ions gave peculiar affinity for 2,4-dichlorophenol.
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Dan Wang, Ranbo Yu, Shouhua Feng, Wenjun Zheng, Ruren Xu, Yasuyuki Mat ...
2003 Volume 32 Issue 1 Pages
74-75
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Giant magnetoresistance material La
0.5Sr
0.5MnO
3 has been synthesized under mild hydrothermal condition at 240 °C and characterized by means of powder X-ray diffraction, thermal analysis, scanning electron microscopy, ICP elemental analysis, and iodometry. The alkalinity and molar ratio of Mn(VII)/Mn(II) in initial reaction mixture, associated with hydrothermal reaction temperature, dominated the crystallization of the product, La
0.5Sr
0.5MnO
3.
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Kazuhiro Kobayashi, Keiichi Yoneda, Masaaki Mano, Osamu Morikawa, Hisa ...
2003 Volume 32 Issue 1 Pages
76-77
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Alkyl(or aryl)lithiums reacted efficiently with
o-isocyano-β-methoxystyrene derivatives, prepared in three steps from
o-aminophenyl ketones, to afford the corresponding 2,4-disubstituted quinolines in satisfactory yields.
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Kazutaka Hirakawa, Naoki Toshima
2003 Volume 32 Issue 1 Pages
78-79
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The plasmon absorption band of colloidal dispersions of poly(
N-vinyl-2-pyrrolidone)-protected Ag nanoparticles was extinguished within several minutes by the addition of Rh nanoparticles sol. Transmission electron micrographs and X-ray diffraction measurements have shown that this phenomenon is due to that the physical mixture of Ag and Rh nanoparticles spontaneously generates the bimetallic nanoparticles with Ag-core/Rh-shell structure.
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Lian-Sheng Ling, Xiao-Hong Fang, Chen Wang, Li-Jun Wan, Chun-Li Bai, D ...
2003 Volume 32 Issue 1 Pages
80-81
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DNA condensation plays a crucial role in DNA strand-exchange, ligation, renaturation and catenation. Thus it has drawn researchers’ great attention. In this work, spermine-induced DNA condensation was studied with epifluorescence microscopy. In the presence of Ru(phen)
2(dppx)
2+ (phen = 1,10-phenanthroline, dppx = 7,8-dimethyl-dipyridophenazine), single λ-DNA with the length of about 10 μm was observed. With the addition of 20 mmol·l
−1 spermine, there occurred DNA multimolecule condensation, resulting in the formation of a 40 μm rod-like highly compacted and ordered superhelical structure with the diameter of about 7 μm. This provides the direct evidence of DNA multimolecule condensation induced by spermine in solution.
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Tushar K. Chakraborty, Animesh Ghosh, T. Venugopal Raju
2003 Volume 32 Issue 1 Pages
82-83
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While methyl- and benzylamines opened
N-tosyl aziridines
1 very efficiently in acetonitrile with complete regio- and stereoselectivity to give the corresponding diamines
2 and
3, respectively, in excellent yields, similar openings with water could only be achieved in the presence of a catalytic amount of cerium(IV) ammonium nitrate under very mild conditions furnishing the amino alcohols
4.
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Kazue Kurihara, Yasuhiro Nakagawa, Masashi Mizukami
2003 Volume 32 Issue 1 Pages
84-85
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Adsorption of ethylene glycol on silica surfaces was investigated in cyclohexane. A long-range attraction appeared between the silica surfaces in the presence of ethylene glycol (>0.0005 mol%). ATR-FTIR spectra exhibited an absorption band at 3600–3000 cm
−1, ascribed to the hydrogen-bonded hydroxyl groups. The results demonstrated that ethylene glycol adsorbed on the silica surfaces in a thick layer of several tens nm where it formed hydrogen-bonded molecular macroclusters.
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Abliz Yimit, Xiuzhu Huang, Yitai Xu, Takashi Amemiya, Kiminori Itoh
2003 Volume 32 Issue 1 Pages
86-87
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Highly sensitive composite optical waveguide (COWG) immunosensors were developed for immunoglobulin IgG detection. The sensing layer of the protein A was coated onto the COWG surface with (γ-aminopropyl) triethoxysilane. The sensor has a short response time, reversibility and high sensitivity (as low as 70 pg/cm
3 IgG was easily detected).
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Takeshi Nagasaki, Katsutoshi Wada, Seizo Tamagaki
2003 Volume 32 Issue 1 Pages
88-89
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The transfection efficiency of a novel photoresponsive cationic lipid having an azobenzene structure can be controlled by UV irradiation. After DNA complexes pass through the cell membrane by endocytosis, trans to cis isomerization of the azobenzene structure would destabilize the vesicle membrane.
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Hiroko Nakagawa, Jun Yoshino, Koh-ichi Yamada, Motoo Shiro
2003 Volume 32 Issue 1 Pages
90-91
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Projection of the crystal structure of a
P enantiomer of [11]thiaheterohelicene (11TH) with a helical structure of one and a half turns along the
a axis revealed huge helical assemblies, in which three crystallographically independent molecules formed a smaller right-handed helix, no similar helical assembly being observed for the crystal structures of an 11TH racemate and a [9]thiaheterohelicene enantiomer.
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Kanji Suyama, Weihong Qu, Masamitsu Shirai, Masahiro Tsunooka
2003 Volume 32 Issue 1 Pages
92-93
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On irradiation with visible light, cationic polymerization of epoxides by a photoacid generator (PAG) was sensitized by benzoquinonylsulfanyl derivatives. Spectral analyses suggest that the reduction of the quinone derivatives on irradiation was the initial and essential step of the polymerization.
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Mahendra P. Kapoor, Shinji Inagaki
2003 Volume 32 Issue 1 Pages
94-95
Published: 2003
Released on J-STAGE: December 20, 2002
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An entirely new route for the synthesis of thermally stable ordered mesoporous silicon oxynitride (MSON) by direct nitridation with nitrogen of periodic ethane-bridged mesoporous silica material is reported.
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Kenji Takeshita, Kunio Watanabe, Yoshio Nakano, Masayuki Watanabe
2003 Volume 32 Issue 1 Pages
96-97
Published: 2003
Released on J-STAGE: December 20, 2002
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The extraction equilibrium of Cd(II) and Zn(II) with a commercial extractant, Cyanex 301, and an aqueous complexing agent, TPEN [
N,
N,
N′,
N′-tetrakis(2-pyridylmethyl)-1,2-ethanediamine] was measured. When TPEN in amounts equimolar with heavy metal (Cd or Zn) was added in the aqueous solution, only the extraction of Zn was depressed. Then, the extraction constant of Cd was little changed and that of Zn was decreased to about 10
−4 times. TPEN acts as a strong masking agent for Zn.
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Kazuo Uchikura
2003 Volume 32 Issue 1 Pages
98-99
Published: 2003
Released on J-STAGE: December 20, 2002
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A new derivatization method for the detection of aliphatic and aromatic amines, based on electro-chemiluminescence (ECL) with Ru(bpy)
32+ is proposed. Sample amines were derivatized to acetoacetylamide-type derivatives using diketene. The derivatives were detected by reversed-phase HPLC with ECL detection using Ru(bpy)
32+.
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Xianghua Kong, Dapeng Yu, Yadong Li
2003 Volume 32 Issue 1 Pages
100-101
Published: 2003
Released on J-STAGE: December 20, 2002
JOURNAL
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A new method has been successfully developed to synthesize SnO
2 nanoribbons in a large scale by direct oxidation of tin powders. The lengths of the nanoribbons were up to several hundreds of micrometers, and the width and thickness were in the range of 20–150 nm and 10–50 nm, respectively. The as-synthesized SnO
2 nanoribbons had preferred [001] growth direction.
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