-
Shigero Oishi, Yuriko Watanabe, Yasunao Kuriyama
1994 Volume 23 Issue 12 Pages
2187-2190
Published: 1994
Released on J-STAGE: March 21, 2006
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Laser flash photolysis of an o-diazonaphthoquinone traced by monitoring infrared in parallel with ultraviolet revealed the dynamic behavior of ketene intermediate, which appeared immediately after the laser pulse and changed swiftly to next intermediate. The fact that the conversion of ketene did not correspond to the formation of ketene hydrate suggested the existence of another intermediate between ketene and ketene hydrate.
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Masayuki Sato, Satoshi Sunami, Tomoyuki Kogawa, Chikara Kaneko
1994 Volume 23 Issue 12 Pages
2191-2194
Published: 1994
Released on J-STAGE: March 21, 2006
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A de Mayo type cyclobutane ring opening of the photo[2 + 2]cycloadduct derived from 2,3-dihydro-4-pyrones and cyclopentene was effected by heating the adduct under an acid catalysis. The 1,2-disubstituted cyclopentanes thus formed spontaneously underwent intramolecular Michael addition to afford
cis-hydroindan-5-ones in satisfactory yields.
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Ermitas Alcalde, Immaculada Dinarés, Josep-María Pons, T ...
1994 Volume 23 Issue 12 Pages
2195-2198
Published: 1994
Released on J-STAGE: March 21, 2006
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For several analogues of heterocyclic betaines
2 and
3, the high dipolar character, due to terminal rings with extreme characteristics within heteroaromatic systems, and the nature of the linkers, had a dominant influence upon their physico-chemical properties in solution. Their structural features enhanced non-covalent interactions inducing coiled conformations.
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Zi-Chen Li, Fu-Mian Li, Shinya Arase, Shinji Takeoka, Eishun Tsuchida
1994 Volume 23 Issue 12 Pages
2199-2202
Published: 1994
Released on J-STAGE: March 21, 2006
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A lithocholic acid derivative having high compatibility with phospholipid was synthesized and incorporated to the phospholipid bilayer membrane. A significant influence of it on the molecular packing and the stability enhancement of the vesicle suspension were clarified by a fluorescence depolarization method and a turbidity measurement, respectively.
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Norio Mori, Satoshi Itou
1994 Volume 23 Issue 12 Pages
2203-2206
Published: 1994
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Coexistence of two cholesteric phases has been observed in poly(γ-benzyl L-glutamate)-1,2-dichloroethane solutions. The two cholesteric phases are distinguished from the length of the pitch under an optical polarizing microscope. Temperature dependence of the pitch differs significantly from each other.
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Eiichi Kikuchi, Tatsuya Ishihara, Masaki Hondoh
1994 Volume 23 Issue 12 Pages
2207-2210
Published: 1994
Released on J-STAGE: March 21, 2006
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Yittrium barium copper oxide (YBa
2Cu
3O
x), known as high-Tc superconductor was used as an electroconductive catalyst and its characteristics in carbon monoxide oxidation were investigated. When direct current of 3 V was charged, YBa
2Cu
3O
x was heated to about 450 °C, at which it catalyzed CO oxidation.
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Thomas Rappert, Akio Yamamoto
1994 Volume 23 Issue 12 Pages
2211-2214
Published: 1994
Released on J-STAGE: March 21, 2006
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The dihydridoruthenium complex
cis-RuH
2(PMe
3)
4 reacts with NH
4PF
6 in acetone to produce
cis-[RuH(NH
3)(PMe
3)
4]PF
6,
cis-[RuH(NH=CMe
2)(PMe
3)
4]PF
6 and
cis-[RuH(NH
2CHMe
2)(PMe
3)
4]PF
6. The isopropylamine ligand originates from reductive animation of the solvent. A possible reaction pathway is discussed.
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U. Costantino, M. Curini, F. Marmottini, O. Rosati, E. Pisani
1994 Volume 23 Issue 12 Pages
2215-2218
Published: 1994
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The synthesis of 2-nitroalkanols from nitroalkanes and aldehydes occurs efficiently, in mild conditions without solvent, when mediated by layered Zr(KOPO
3)
2. The reaction has been tested in the preparation of ten different nitroalkanols and the data obtained seem to indicate that not only the surface but also the interlayer ≡P–O
−K
+ groups are involved in the catalytic process.
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Hiroyuki Kurata, Takeshi Kawase, Masaji Oda
1994 Volume 23 Issue 12 Pages
2219-2222
Published: 1994
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Oligo-6-(2-thienyl)pentafulvenes smoothly undergo alkali metal reduction to form novel, stable oligothienylenemethines attached with cyclopentadienide groups as confirmed by UV-Vis and NMR spectra.
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Taishi Kuri, Namiko Honda, Yushi Oishi, Tisato Kajiyama
1994 Volume 23 Issue 12 Pages
2223-2226
Published: 1994
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Relationship between structure regularity and the propagation loss of Langmuir-Blodgett(LB) film waveguides was investigated. The LB film with a homogeneous surface morphology could be constructed from the mechanically stable monolayer prepared by the multi-step creep method. The propagation loss of the LB film waveguide was decreased by the surface flatness of the LB film.
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Toshinori Nishiyama, Kazuhiko Mizuno, Yoshio Otsuji, Hiroo Inoue
1994 Volume 23 Issue 12 Pages
2227-2228
Published: 1994
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Emission associated with exciplex between (
R)-(−)- or (
S)-(+)-2,2′-dimethyl-1,1-bianthryl (
R-(−)-
1 or
S-(+)-
1) and N,N-dimethylaniline (DMA) was quenched by (+) and (−)-menthyl cinnamates at room temperature. The chiral exciplexes were discriminated by the two enantiomeric quenchers that interact with the exciplexes in an enantioselective manner.
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Naoki Toshima, Hu Yan, Yaeko Gotoh, Mariko Ishiwatari
1994 Volume 23 Issue 12 Pages
2229-2232
Published: 1994
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Poly(anthranilic acid), prepared by oxidative polymerization of anthranilic acid with ammonium peroxodisulfate, is soluble in N-methyl-2-pyrrolidone. The casting of the resulting solution forms a smooth film of poly(anthranilic acid). Heat treatment of the poly(anthranilic acid) film at about 240 °C produces a polyaniline film accompanying the elimination of carbon dioxide, which can provide a new method of preparation of a polyaniline film from the precursor.
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Jun Takeda, Mitsuo Sato
1994 Volume 23 Issue 12 Pages
2233-2236
Published: 1994
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Sterically overcrowded unsymmetrical porphyrins bearing ten and eleven phenyl groups are synthesized using mixed condensation of diphenylpyrrole with benzaldehyde and formaldehyde and characterized by FAB-MS, UV-VIS, and NMR spectra.
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Yukiko Nishizaka, Makoto Misono
1994 Volume 23 Issue 12 Pages
2237-2240
Published: 1994
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It has been demonstrated that the protonic acidity is essential for the reduction of nitrogen monoxide by methane over Pd ion-exchanged H-ZSM-5 (Pd/HZ), by the comparison of the reaction with that over Pd ion-exchanged Na-ZSM-5 (Pd/NaZ), having similar dispersion of palladium. It was further shown that the difference between the active Pd/HZ and the inactive Pd/NaZ is present in the reaction between NO
2 and CH
4.
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Sang-Chul Moon, Kouji Tsuji, Takaiki Nomura, Masakazu Anpo
1994 Volume 23 Issue 12 Pages
2241-2244
Published: 1994
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The evacuation of the ZrO
2 catalyst at higher temperatures led to the appearance of an abnormal absorption and photoluminescence due to the formation of coordinatively unsaturated surface sites. These active ZrO
2 catalysts having coordinatively unsaturated surface sites exhibited a high catalytic activity for the selective dimerization of C
2H
4 to 2-C
4H
8. In the presence of H
2 and C
2H
4, the formation of C
4H
10 was observed in place of 2-C
4H
8. The significant role of the coordinatively unsaturated surface sites in these reactions on the active ZrO
2 catalyst has been clarified in detail for the first time.
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Barry M. Trost, Shoko Yamazaki
1994 Volume 23 Issue 12 Pages
2245-2248
Published: 1994
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The Pd-catalyzed reaction of 2-vinylcyclopentenes
2 and
3 with trimethylenemethane gave [4+3] and [3+2] cycloadducts. Derivatization of 2-vinylcyclopentenones with bulky ketal substituents served to enhance seven-membered ring formation.
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Tetsuo Asakura, Makoto Demura, Yoshiaki Hiraishi, Katsuaki Ogawa, Atsu ...
1994 Volume 23 Issue 12 Pages
2249-2252
Published: 1994
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The
13C-
15N dipolar splitting was observed for the oriented [1-
13C]glycine-[
15N]alanine
Bombyx mori silk fibroin rods placed parallel to the magnetic field with
15N solid state NMR spectroscopy. The isotope labeled and oriented silk fibroin samples were prepared by the cultivation of the middle silkgland from the silkworm. The angle between the
13C-
15N peptide bond of the glycine-alanine sequence and the oriented axis was determined as 141° from the coupling constant.
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Jun-ichiro Setsune, Jun-ya Watanabe
1994 Volume 23 Issue 12 Pages
2253-2256
Published: 1994
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Cobalt(II) porphyrins reacted with various aldehydes in the presence of NaBH
4 and t-BuOOH to form σ-(acyl)cobalt(III) porphyrins in good yields. When t-BuOOH was replaced by molecular oxygen in the reaction with propanal, σ-(1-formylethyl)cobalt(III) porphyrin and its oxygenated byproduct, σ-(1-formylethoxy)cobalt(III) porphyrin, were obtained predominantly.
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Ryoichi Kishi, Yasuzo Suzuki, Hisao Ichijo, Okihiko Hirasa
1994 Volume 23 Issue 12 Pages
2257-2260
Published: 1994
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Liquid-crystalline elastomer carrying cyanobiphenyl side groups was synthesized by radical copolymerization of 6-(4′-cyanobiphenyl-4-yloxy)hexyl acrylate and hexamethylene diacrylate. Liquid-crystalline elastomer was swollen in a low molecular weight liqud crystal. Swollen elastomer in the nematic phase quickly deformed by application of DC voltage.
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Ryuichi Ueoka, Jiro Okai, Kenji Shimada, Daisuke Segawa, Takashi Nakat ...
1994 Volume 23 Issue 12 Pages
2261-2262
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The perfect enantioselective catalysis was obtained for the hydrolytic cleavage of p-nitrophenyl N-dodecanoyl-D(L)-phenylalaninates through the modified enzyme (Decanoyl-α-Chymotrypsin).
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Akira Miyashita, Yoshiko Saida
1994 Volume 23 Issue 12 Pages
2263-2266
Published: 1994
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trans-Pt(CH
2CMe
2Et)Br(PPh
3)
2 induced C-H bond activation of CH
4 under UV p irradiation leading to
trans-PtMeBr(PPh
3)
2, while H-D exchange reaction of CH
4 with D
2 or D
2SO
4 took place in the photochemical reaction system containing Pt(PPh
3)
4 and neohexyl bromide. A possible reaction mechanism involving radical process is discussed on the basis of radical-trap experiment.
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Ko-ichi Kikuta, Akifumi Tosa, Toshinobu Yogo, Shin-ichi Hirano
1994 Volume 23 Issue 12 Pages
2267-2270
Published: 1994
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Lead titanate fine powders were synthesized by the hydrothermal method without using alkali mineralizers such as KOH. Preparation conditions influenced strongly the resultant phases, morphologies, and compositions of the lead titanate powders. Some observations on the prepared lead titanate were also carried out by the transmission electron microscopy and ζ-potential measurement.
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Hui-ping Zhang, Yoshiaki Kamano, Haruhisa Kizu, Hideji Itokawa, George ...
1994 Volume 23 Issue 12 Pages
2271-2274
Published: 1994
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Convolutamines A-E, novel cytotoxic alkaloids, have been isolated from Floridian bryozoan
Amathia convoluta and the structures have been elucidated on the basis of extensive spectroscopic data.
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Yoo Tanabe, Takuya Makita, Kei Mori
1994 Volume 23 Issue 12 Pages
2275-2278
Published: 1994
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The thiocyanato (-SCN) group was directly and regioselectively introduced into the α-position of ketones, aldehydes, and aldols in an electrophilic manner by the combined use of thiocyanatotrimethylsilane and sulfuryl chloride with or without cyclic
sec-amine catalysts under mild reaction conditions.
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Kiyotaka Onitsuka, Kayoko Miyaji, Tomohiro Adachi, Toshikatsu Yoshida, ...
1994 Volume 23 Issue 12 Pages
2279-2282
Published: 1994
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The reaction of 1,1′-bis(phenylethynyl)ferrocene with Ru
3(CO)
12 gave a novel trinuclear ruthenacycle complex having a [2]ferrocenophane skeleton. A similar treatment of 1,1′-bis(trimethylsilylethynyl)ferrocene afforded not only a trinuclear ruthenacycle analog but also a dinuclear ruthenacycle complex that also possessed a [2]ferrocenophane skeleton. These complexes were characterized by means of spectroscopic and X-ray diffraction analyses.
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Kazuaki Shimada, Satoru Akimoto, Yuji Takikawa, Chizuko Kabuto
1994 Volume 23 Issue 12 Pages
2283-2286
Published: 1994
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Heating of alkynyl propargyl selenides afforded a stereoisomeric mixture of 5,10-diselenadispiro[3.1.3.1]deca-1,7-dienes. The 1,3-diselenetane rings of the products caused cycloreversion by heating to generate 2-methylene-3-cyclobutene-1-selones and the selones were trapped with diene to give [4+2] cycloadducts.
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Hideki Takeda, Motohiro Jyo-o, Yo-ichi Ishikawa, Shigeyoshi Arai
1994 Volume 23 Issue 12 Pages
2287-2290
Published: 1994
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Time-resolved infrared absorption spectra were observed following the pulsed 266-nm photolysis of W(CO)
6 in the presence of C
2H
4 in the gas phase at room temperature. The transient spectra showed that the coordination of C
2H
4 onto “naked” coordinatively bisunsaturated tungsten carbonyl W(CO)
4 resulted in the formation of internally excited W(CO)
4(η
2-C
2H
4)
*.
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Hiroyuki Higuchi, Seiken Kiyoto, Chiaki Sakon, Naoki Hiraiwa, Kaori As ...
1994 Volume 23 Issue 12 Pages
2291-2294
Published: 1994
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A bismethano-bridged bisdehydro[21]annulenone, tricyclo[15.4.1.1
6,11]tricosa-6,8,10,12,15,17,19,21-octaene-2,4-diyn-14-one, was synthesized. X-ray crystallography reveals the syn orientation of the two methano bridges. Two conformers are present in solution in a 97:3 ratio, the major isomer being the one existing in the crystalline state. Paratropicity of this compound in CDCl
3 and in CF
3CO
2D is discussed.
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Kazunari Hashizume, Naoto Hashimoto, David G. Cork, Yoshihiro Miyake
1994 Volume 23 Issue 12 Pages
2295-2298
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A rapid micro-scale synthesis of fluorinated neuroleptics with extremely high chemical purity was accomplished using a new single column reverse-phase HPLC purification procedure that employs a strongly alkaline eluent to clearly separate F-labeled compounds from the large excess of nitro or chloro precursor. The method is applicable to the production of
18F-labeled positron emission tomography (PET) tracers with high specific activity.
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Noboru Yamamoto, Minoru Isobe
1994 Volume 23 Issue 12 Pages
2299-2302
Published: 1994
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Trichloroacetamides obtained
via Overman [3,3] sigmatropic rearrangement were converted into dibenzyl guanidines. The key step was conversion of carbodiimide intermediate into guanidine by scandium or ytterbium trifluoromethane-sulfonates. This method was applied to a synthesis of guanidinium ring of (−)-tetrodotoxin.
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Tomohiko Horikawa, Yoshihiro Mimaki, Aiko Kameyama, Yutaka Sashida, Ta ...
1994 Volume 23 Issue 12 Pages
2303-2306
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A novel steroidal saponin, named aculeoside A, embracing a deoxyaldoketose, 6-deoxy-
D-glycero-
L-threo-4-hexosulose, was isolated from the underground parts of
Ruscus aculeatus. The structure was determined by extensive 2D NMR analysis and hydrolysis. Aculeoside A was active as a cyclic AMP phosphodiesterase inhibitor.
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Akio Fukuzawa, Mya Aye, Yasunori Takasugi, Masao Nakamura, Mamoru Tamu ...
1994 Volume 23 Issue 12 Pages
2307-2310
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Natural (3
E,6
R,7
R)- and (3
Z,6
S,7
S)-laurediols were subjected to enzymatic reaction with the partially purified bromoperoxidase from the red alga,
Laurencia nipponica, in the presence of H
2O
2 and NaBr to afford laurencin and prelaureatin, respectively. The further reaction of these products with bromoperoxidase gave rise to the bicyclic bromo-ethers.
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Tadashi Endo, Takashi Isago, Hideshi Gohara, Susumu Watanabe, Takashi ...
1994 Volume 23 Issue 12 Pages
2311-2314
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In oxidation of a pair of associating thiols, one with a straight-chain alkyl or a cyclic hydrocarbon group and the other with a butyl or pentyl group, it has been shown that a butyl group can be distinguished accurately from a pentyl group by a cyclopentyl group in aqueous ethanol.
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Takuya Takahira, Keisuke Umakoshi, Yoichi Sasaki
1994 Volume 23 Issue 12 Pages
2315-2318
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Two rhenium(III) complexes with a single oxide bridge, [Re
2(μ-O)Cl
2(L)
2]
2+ (L = 2,2′-bipyridine (bpy) or 1,10-phenanthroline (phen)) were prepared, and the crystal structure of the phen complex was determined. The complexes show four reversible one-electron redox couples, [Re
2(μ-O)Cl
2(L)
2]
0/+/2+/3+/4+ in acetonitrile. Both Re
2(III,III) and Re
2(III,IV) states of these complexes exhibit strong visible absorption bands.
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Aiping Wu, Mitsutoshi Jikei, Masa-aki Kakimoto, Yoshio Imai, Sadayuki ...
1994 Volume 23 Issue 12 Pages
2319-2322
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Novel polymeric light emitting diodes based on poly(p-phenylene vinylene) and polyimide LB films were fabricated. The former and the latter were used as the light emitting layer and the hole transporting layer, respectively. The results indicated that charge injection and electroluminescent efficiency were improved remarkably by the incorporation of the polyimide hole transporting layer.
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Yuri Lvov, Katsuhiko Ariga, Toyoki Kunitake
1994 Volume 23 Issue 12 Pages
2323-2326
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Layer-by-layer assembly of multilayer films was realized by means of alternate adsorption of positively charged globular proteins (myoglobin or lysozyme) and anionic poly(styrenesulfonate). Regular growth during at least 20 alternate adsorption cycles was proved by means of UV spectroscopy and quartz crystal microbalance. Superlattices containing alternate layers of both myoglobin and lysozyme were similarly prepared.
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Ulrich Kux, Masahiko Iyoda
1994 Volume 23 Issue 12 Pages
2327-2330
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New donors, containing one or two tetrathiafulvalenes at 2-, 2,7- and 2,10-positions of 1,6-methano[10]annulene or at 1,8-positions of naphthalene, have been synthesized. Through-space and/or through-bond interactions between TTF units in these compounds have been investigated by means of cyclic voltammetry.
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Masatoshi Kanesato, Toshiro Yokoyama, Osamu Itabashi
1994 Volume 23 Issue 12 Pages
2331-2334
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In the reaction of Lanthanum(III) and Gadolinium(III) complexes coordinated by the ligand 1,9-bis(2-aminoethyl)-1,4,6,9,12,14-hexaazacyclohexadecane with salicylaldehyde, only Gd
3+ was led to an unexpected complex with the ligand tris{2-(salicylideneamino)ethyl}amine. The difference of the reactivity was applied to the separation of La
3+ and Gd
3+.
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Hiroaki Okamoto, Hiroaki Arita, Nobuo Kato, Hitoshi Takeshita
1994 Volume 23 Issue 12 Pages
2335-2338
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Cotylenol, one of the representative fusicoccane diterpenoids having 5-8-5-membered tricyclic carbon framework, is now synthesized for the first time
via an eight-membered ring formation by an intramolecular ene reaction followed by an oxidative formation of the 8β,9α-glycol function on the central eight-membered ring.
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Makoto Minato, Susumu Kurishima, Ko-ichiro Nagai, Mikio Yamasaki, Taka ...
1994 Volume 23 Issue 12 Pages
2339-2342
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Molybdenum and tungsten hydrido-malonato complexes have been prepared by the photochemical or thermal reactions of [MoH
4(dppe)
2] or
trans-[W(N
2)
2(dppe)
2] with an excess of alkyl malonates. The structure of the complex is reported, and a possible mechanism is proposed for the reaction.
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Toshihiro Kumazawa, Shingo Sato, Daisuke Kanenari, Akira Kunimatsu, Ry ...
1994 Volume 23 Issue 12 Pages
2343-2344
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Precursor of Carthamin was isolated from the flowers of
Carthamin tinctorius L. (Safflower) and its structure was characterized as
1 on the basis of spectroscopic analysis and by comparing its properties with those of synthetic model compound.
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Eiji Wada, Wen Pei, Shuji Kanemasa
1994 Volume 23 Issue 12 Pages
2345-2348
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Highly enantio- and
endo-selective Diels-Alder reactions of (
E)-1-phenylsulfonyl-3-alken-2-ones, a new type of chelating dienophile, with cyclopentadiene are achieved by the aid of a catalytic amount of chiral titanium catalysts. Mode of enantioselectivities depend upon the size of aryl substituents involved in the chiral ligands; dramatic reversal of selectivities is observed.
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Ryohei Yamaguchi, Seiichi Kobayashi, Sinpei Kozima
1994 Volume 23 Issue 12 Pages
2349-2352
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An efficient triple addition of allyl groups to 1,3,5-triazine has bee carried out by means of an allyltin reagent to give 2,4,6-trially-1,3,5-triazacyclohexanes in high yields. Epoxidation and hydroxylation of the syn,syn-stereoisomer afford geometrically interesting syn,syn-trifunctionalized 1,3,5-triazacyclohexane derivatives.
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Hiroki Oshio, Akihiro Ohto, Jun’ichi Fujisawa, Takashi Watanabe, ...
1994 Volume 23 Issue 12 Pages
2353-2356
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A new Rh(III) complex, [Rh(Cp*)(bisnitpy)](PF
6)
2 (Cp* = η
5-C
5Me
5 and bisnitpy = 2,6-bis(1′-oxyl-3′-oxido-4′,4′,5′,5′-tetramethyl-4′,5′-dihydro-1′
H-imidazol-2′-yl)pyridine), has been prepared, which is the first example of organometallic complex having nitronyl nitroxide ligand. X-ray structure and magnetic property of the title complex are reported.
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Masato Yoshida, Daiki Suzuki, Masahiko Iyoda
1994 Volume 23 Issue 12 Pages
2357-2360
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PhCF
2Cl suffered readily one-electron reduction with SmI
2 to give PhCF
2 radical and chloride ion. The resulting PhCF
2 radical was further reduced with SmI
2 to PhCF
2SmI
2 which reacted with electrophile such as Me
3SiCl. The initially formed PhCF
2 radical could be trapped by olefin or acetylene before it was reduced to PhCF
2SmI
2.
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Yasuhisa Kuroda, Yuichiro Egawa, Hidenori Seshimo, Hisanobu Ogoshi
1994 Volume 23 Issue 12 Pages
2361-2364
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A porphyrin having two molecules of 2,3,6-permethyl-β-cyclodextrin was synthesized. The starting materials employed were the αβαβ atoropisomer or meso-tetrakis(o-aminophenyl)porphyrin and the diacidchloride of A,D-dicarboxyl derivative of 2,3,6-permethyl-β-cyclodextrin. As expected the product contained two isomers which were isolated by HPLC.
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Atsuo Suga, Yuji Mochizuki, Noritaka Nagasaki, Yoshihiko Gotoh, Haruak ...
1994 Volume 23 Issue 12 Pages
2365-2368
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An excellent linear correlation was found between calculated and experimental total infrared intensities in the region of 500–2000 cm
−1 for five partially fluorinated ethyl methyl ethers, HFC-134a, and CFC-11. The calculated results using ab initio molecular orbital method with D95V
**(Huzinaga-Dunning’s valence double zeta) show the best linear correlation among basis sets examined in this study. The correlation coefficient with D95V
** is 0.9993 although the calculated values are on the average 32% higher than experimental ones.
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Masahiko Iyoda, Mitsuhiro Fukuda, Masato Yoshida, Shigeru Sasaki
1994 Volume 23 Issue 12 Pages
2369-2372
Published: 1994
Released on J-STAGE: April 26, 2006
JOURNAL
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New donors having two or three tetrathiafulvalene moieties at 1,3- and 1,3,5-positions of the aromatic rings have been synthesized in order to examine the interactions of tetrathiafulvalene radical-cations in the diradical-dication or triradical-trication states. The molecular structures of two neutral donors have been determined and the conductivity of the CT complexes of the new donors have been measured.
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Seiki Tanada, Yasuhiro Torii, Takeo Nakamura, Naohito Kawasaki, Toshim ...
1994 Volume 23 Issue 12 Pages
2373-2376
Published: 1994
Released on J-STAGE: April 26, 2006
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The interaction between methylchloroform and a surface modified activated carbon, which was treated with tetrafluoromethane plasma, was evaluated on the basis of adsorption isotherms and physicochemical properties of the activated carbon. Tetrafluoromethane plasma-treated activated carbon could be used for the complete recovery of methylchloroform.
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Keiichi Tsukahara, Chieko Kimura, Junko Kaneko, Tomoko Hara
1994 Volume 23 Issue 12 Pages
2377-2380
Published: 1994
Released on J-STAGE: April 26, 2006
JOURNAL
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The excited triplet state of zinc myoglobin was preferentially quenched by (
S,
S)-isomers of optically active viologens, 1,1′-bis(1-phenylethylcarbamoylmethyl)-4,4′-bipyridimum (OAV
2+) and 1,1′-bis(1-(1-naphthyl)ethylcarbamoylmethyl)-4,4′-bipyridinium (NOAV
2+) ions:
kq((
S,
S)-)/
kq((
R,
R)-) = 1.5 for NOAV
2+ and 1.3 for OAV
2+ at 25 °C and an ionic strength of 0.02 mol dm
−3.
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