-
Shouji Iwatsuki, Masataka Kubo, Toshiyuki Kumeuchi
1991 Volume 20 Issue 7 Pages
1071-1074
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
Poly(phenylene-chloroethylene) film was prepared by the vapor deposition polymerization of 1,9-dichloro[2.2]paracyclophane and was converted into fully extended π-conjugated poly (phenylene-vinylene) by thermal dehydrochlorination at 300 °C under nitrogen for 1 h.
View full abstract
-
Hidetsugu Ikeda, Toshio Sakai, Kenji Kawasaki
1991 Volume 20 Issue 7 Pages
1075-1078
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
Asymmetric carbocyanine dyes were synthesized and their third-order optical nonlinearities in solutions were investigated by using degenerate four-wave mixing technique. Large third-order hyperpolarizabilities of electronic origin up to 10
−28 esu were observed and the advantage of asymmetric structures was demonstrated.
View full abstract
-
Yoshinori Sasaki, Kenji Yamada
1991 Volume 20 Issue 7 Pages
1079-1080
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
Metallic titanium was selenidized at temperatures of 550–700 °C in selenium vapor at 4.5 kPa. The reaction product was identified to be Ti
1+xSe
2 alone under all experimental conditions. Selenide growth rates were parabolic. A marker experiment indicated that the. reaction was controlled by inward diffusion of selenium through the selenide layer.
View full abstract
-
Ken Sakai, Kazuko Matsumoto, Kyosuke Nishio
1991 Volume 20 Issue 7 Pages
1081-1084
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
Red-purple plate crystals of [Pt
8(NH
3)
16(CH
2 FCONH)
8](NO
3)
8.66·4H
2O have been prepared and the crystal structure is reported. Magnetic susceptibility measurement revealed that the compound is mixture of [Pt(2.0+)
8(NH
3)
16(CH
2FCONH)
8]
8+ (Pt(2.0+)
8) and [Pt(2.125+)
8(NH
3)
16(CH
2FCONH)
8]
9+ (Pt(2.125+)
8), and the mixed ratio is Pt(2.125)
8/Pt(2.0+)
8 = 1.97.
View full abstract
-
Toshinobu Ohno, Tatsumi Fukumoto, Tsuneaki Hirashima, Ikuzo Nishiguchi
1991 Volume 20 Issue 7 Pages
1085-1088
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
The use of some kinds of glasslike-hard carbons was found to lead to selective synthesis of the corresponding Kolbe coupled products in high yields comparable to the use of a Pt anode in anodic oxidation of some carboxylic acids.
View full abstract
-
Jean-Luc Dubois, Charles J. Cameron
1991 Volume 20 Issue 7 Pages
1089-1092
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
The use of yttria as an oxidative coupling of methane catalyst leads to relatively high carbon monoxide selectivity. This behavior, identical to that found with thoria, is believed to be due to the absence of carbonate formation and the stability of surface superoxide on these two oxides. The addition of high temperature stable alkaline earth carbonates decreases CO synthesis activity while increasing overall catalytic activity.
View full abstract
-
Kazushige Maruyama, Takahiro Kusukawa, Yoshihiko Higuchi, Akira Nishin ...
1991 Volume 20 Issue 7 Pages
1093-1096
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
Cobalt Schiff base complex catalyzed oxidation of secondary aromatic amines with
t-butyl hydroperoxide resulted selectively in dehydrogenation to give the corresponding imines. Proposed mechanism involves electron transfer from the nitrogen atom in the substrate to
t-butyloxyl or
t-butylperoxyl radical produced
in situ from a
t-butylperoxocobalt(III) complex intermediate.
View full abstract
-
Koichi Nishigaki, Norihiko Amano, Tsutomu Takasawa
1991 Volume 20 Issue 7 Pages
1097-1100
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
A new method to obtain profiles of giant genome DNAs is described. It is based on two key techniques: Random PCR using oligonucleotides and temperature gradient gel electrophoresis. The experiments applied to the DNAs of 3 strains of
E.coli demonstrated that this technique is informative and useful. The random PCR which uses various combinations of oligonucleotides as primers is effective to extract specific DNAs from a giant genome DNA.
View full abstract
-
Akira Watanabe, Minoru Matsuda
1991 Volume 20 Issue 7 Pages
1101-1104
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
Conductive thin film was prepared by the heat-treatment of poly(phenylsilane) which has a silicon-silicon network structure. The decrease of optical band-gap E
g,opt and the increase of spin concentration were observed with increasing heating temperature. The FT-IR spectra showed the formation of SiC structure at high temperature.
View full abstract
-
Yoshio Okamoto, Toshikage Asakura, Koichi Hatada
1991 Volume 20 Issue 7 Pages
1105-1108
Published: 1991
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
Two methacrylates with a biphenyl moiety as a mesogenic group were anionically polymerized with
t-butylmagnesium bromide in toluene, chloroform, and tetrahydrofuran at low temperature. Differential scanning calorimetric analysis of the highly isotactic and syndiotactic polymethacrylates obtained indicated that tacticity of the polymers greatly influences their liquid crystallinity.
View full abstract
-
Kazuhiko Sakaguchi, Yutaka Shiomi, Tohru Kitamura, Yoshikazu Takehira, ...
1991 Volume 20 Issue 7 Pages
1109-1112
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Optically active α-alkyl-γ-aryloxymethyl-γ-lactones were synthesized from chiral epichlorohydrin in short steps and found to be superior chiral dopants for ferroelectric liquid crystals (FLCs).
View full abstract
-
Masahiro Watanabe, Chiyoka Shimura, Kazunori Tsurumi, Noriaki Hara
1991 Volume 20 Issue 7 Pages
1113-1116
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The development of an electrode having a completely wet-proofed gas-permeable network was achieved by the introduction of carbon support covered with a thin hydrophobic film of directly fluorinated polyethylene. Its promising property as a long life electrode was demonstrated and the electrode structure was proposed.
View full abstract
-
Yasuhiro Mazaki, Naoyoshi Takiguchi, Keiji Kobayashi
1991 Volume 20 Issue 7 Pages
1117-1120
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The quinones of the condensed thiophenes were prepared in good yields by use of an elimination reaction of di-
tert-butoxy derivatives. The redox and UV-spectral properties of these compounds are demonstrated.
View full abstract
-
Itaru Hamachi, Tatsuya Honda, Shunsaku Noda, Toyoki Kunitake
1991 Volume 20 Issue 7 Pages
1121-1124
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Myoglobin (Mb) was intercalated in a specific orientation into a multilayered cast film of a phosphate bilayer membrane, whereas Mb intercalated in an ammonium multibilayer film was denatured.
View full abstract
-
Yasushi Yokoyama, Tatsuo Tanaka, Takeshi Yamane, Yukio Kurita
1991 Volume 20 Issue 7 Pages
1125-1128
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
1,2-Dimethylindolylfulgides with 5-methylthio, 5-methoxy, or 5-dimethylamino group on the indole ring were synthesized and their photochromic properties were examined. Electron donating substituents lengthened the absorption maximum of the colored form and decreased the quantum yields of the photoreactions. The colored form of the dimethylaminoindolyl-substituted fulgide has λ
max at 673 nm, the longest absorption maximum wavelength ever known as that of a fulgide.
View full abstract
-
Kohji Yoshinaga, Masaru Rikitake, Taketoshi Kito, Yukiko Yamamoto, Hir ...
1991 Volume 20 Issue 7 Pages
1129-1132
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The dimethylsilyl(–Si(CH
3)
2H) substitution of hydroxyl hydrogen led to a convenient determination of surface silanol group on silica gels by Si-H bond stretching vibrational absorption analysis. The proposed procedure can be freed from influences of adsorbed water and moisture through the measurement process.
View full abstract
-
Hiroshi Sakiyama, Ken-ichiro Motoda, Hisashi Okawa, Sigeo Kida
1991 Volume 20 Issue 7 Pages
1133-1136
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The reaction of 2,6-diformyl-4-methylphenol, triethylenetetramine, and copper(II) perchlorate hexahydrate in the 2:2:4 molar ratio formed a macrocyclic tetracopper(II) complex [Cu
4(L)(OH)
2](ClO
4)
4 where H
2L denotes the macrocycle formed by two molecules of 2,6-diformyl-4-methylphenol and two molecules of triethylenetetramine. The two hydroxide groups, each bridging a pair of copper(II) ions, are facing each other in a close distance so as to be replaced by an azide ion, affording [Cu
4(L)(N
3)](ClO
4)
5.
View full abstract
-
Terufumi Fujiwara, Noriyuki Tanimoto, Kazue Nakahara, Takahiro Kumamar ...
1991 Volume 20 Issue 7 Pages
1137-1140
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Upon mixing of tris(8-quinolinolato)iron(III), an enhancement in the chemiluminescence emission resulting from the luminol-hydrogen peroxide reaction in reversed micellar solution was observed. Uptake of the complex by reverse micelles and its subsequent decomposition in the micelles appear to occur easily in the process.
View full abstract
-
Akikazu Matsumoto, Yoshitaka Oki, Atsushi Horie, Takayuki Otsu
1991 Volume 20 Issue 7 Pages
1141-1144
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
N-Trialkylsilylmaleimides bearing trimethylsilyl,
t-butyldimethylsilyl and dimethylthexylsilyl groups as
N-substituents were prepared and polymerized with a radical or anionic initiator. It was revealed that the resulting polymers had a high molecular weight, and showed excellent thermal stability. These polymers were readily converted to polymaleimide by acid hydrolysis.
View full abstract
-
Takayuki Otsu, Akikazu Matsumoto, Atsushi Horie, Satoshi Tanaka
1991 Volume 20 Issue 7 Pages
1145-1148
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
1-Adamantyl and 3,5-dimethyl-1-adamantyl acrylates, methacrylates, and crotonates were polymerized through radical or anionic mechanism. Thermally stable and less-flexible vinyl polymers were obtained, depending on the structure of the repeating monomer units.
View full abstract
-
Shigeru Shimada, Kazuhiko Saigo, Hideyuki Nakamura, Masaki Hasegawa
1991 Volume 20 Issue 7 Pages
1149-1152
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
In the presence of titanium(IV) chloride, 2-(dimethylamino)cyclobutanecarboxylic esters, equivalents of 1,4-zwitterions, reacted with carbonyl compounds to give δ-lactols or dihydropyrans.
View full abstract
-
Akira Mori, Nobuaki Nishiyama, Masahiro Kodama, Hitoshi Takeshita
1991 Volume 20 Issue 7 Pages
1153-1156
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The structure of saponified product of Wittmann’s trimeric condensates of phenylmalonyl dichloride is revised from 4-hydroxy-3,6,7-triphenyl-
p-tropoquinone to 5
H-3,5,7-triphenylfuro[3,2-
b]pyran-2,6-dione based on the chemical and X-ray crystallographic results.
View full abstract
-
Masaaki Ohba, Hiroko Tamaki, Naohide Matsumoto, Hisashi Okawa, Sigeo K ...
1991 Volume 20 Issue 7 Pages
1157-1160
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Three oxalate-bridged binuclear Cu(II)–Cr(III) complexes [(salen)Cr(ox)Cu(L
m)] (
1, HL
1 =
N-salicylidene-
N-(2-pyridylethyl)amine;
2, HL
2 =
N-acetylacetonylidene-
N-(2-pyridylethyl)amine;
3, HL
3 =
N-salicylidene-
N′,
N′-diethylethylenediamine) have been prepared and the cryomagnetic susceptibility measurements(4.2–300 K) revealed that the spin-coupling is ferromagnetic with the
J values +2.8, +2.2, and +2.7 cm
−1 for
1,
2, and
3, respectively, based on
H = −2
JSCuSCr. The
J values are well compatible with
J = +2.9 cm
−1 of {NBu
4[CuCr(ox)
3]}
x evaluated from the equation
Tc=n
J/3
k[
SCr(S
Cr+1)S
Cu(S
Cu+1)]
1/2 (
Tc = 7 K, n = 3) based on Heisenberg’s theory of ferromagnetism.
View full abstract
-
Gaku Yamamoto
1991 Volume 20 Issue 7 Pages
1161-1164
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The title compound exists as a 1:1 mixture of
ap and ±
sc rotamers at equilibrium in CDCl
3. The origin of the unusually high population of the
ap rotamer was explored by molecular mechanics calculations. The two rotamers were separately isolated as crystals by selective crystallization.
View full abstract
-
Hidemitsu Uno, Ayumi Yayama, Hitomi Suzuki
1991 Volume 20 Issue 7 Pages
1165-1168
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Treatment of 4-perfluoroalkyl-4-quinols with a catalytic amount of potassium
t-butoxide gave 2-(perfluoroalkyl)hydroquinones or 5-perfluoroalkyl-2-cyclohexene-1,4-diones in good to moderate yields depending upon the substitution pattern of the quinols. Similarly, 2-hydroxy-3-methyl-2-perfluorooctyl-1-propyl-3-pyrrolin-5-one underwent the base-induced rearrangement to afford a perfluoroalkylated succinimide derivative.
View full abstract
-
Takashi Ogawa, Hideo Hosaka, Tatsusi Makita, Hiroshi Takaku
1991 Volume 20 Issue 7 Pages
1169-1172
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The 1-(isopropoxy)ethyl group (Ipe) has been employed for the protection of the 2′-hydroxy groups of ribonucleoside residues in the synthesis of oligoribonucleotides by the phosphoramidite approach on a solid support, using an base-labile 5′-9-fluorenylmethoxycarbonyl (Fmoc) group.
View full abstract
-
Bipin Pandey, Asawar A. Athawale, Ravinder S. Reddy, Pramod V. Dalvi, ...
1991 Volume 20 Issue 7 Pages
1173-1176
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Irradiation of a solution of ethanol containing Diels–Alder cycloadducts and 10–20% (by volume) triethylamine at 300 nm furnishes quantitative yield (>90%) of corresponding exo isomers. A probable mechanism based on photo-induced electron transfer (PET) has been described.
View full abstract
-
Masaaki Ikeda, Kiyoshi Kitahara, Hisao Nishi, Hiroo Nakahara, Kiyoshig ...
1991 Volume 20 Issue 7 Pages
1177-1180
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Long chain derivatives of carbazoledioxazines with a linear and an angular type structures were synthesized. Monolayers were spread on water surface from toluene solution and deposited onto solid supports. From pressure-area isotherms and thickness together with polarized visible and IR spectra of multilayers, the molecular orientations in the films were investigated.
View full abstract
-
Katsunori Yano, Akio Baba, Haruo Matsuda
1991 Volume 20 Issue 7 Pages
1181-1184
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Redistribution of allyltributyltin and dibutyltin dichloride into allyldibutyltin chloride and tributyltin chloride is enhanced by coordinative compounds such as phosphine oxide and ammonium chloride. This redistribution is applied to the reaction of allyltributyltin and acid chlorides promoted by catalytic amounts of dibutyltin dichloride-tetraethylammonium chloride.
View full abstract
-
Hideharu Seto, Zhao-hui Qian, Hirosuke Yoshioka, Yukitaka Uchibori, Ma ...
1991 Volume 20 Issue 7 Pages
1185-1188
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Anhydrous tetrabutylphosphonium hydrogen bifluoride (
2), dihydrogen trifluoride prepared from aq. tetrabutylphosphonium hydroxide and aq. HF, and tetrabutylphosphonium fluoride prepared from
2 and Bu
nLi were shown to be useful fluoride sources for selective nucleophilic fluorination of oxiranes, alkyl halides, alcohols and sulfonates of aliphatic and steroidal species.
View full abstract
-
Masayasu Akiyama, Akira Katoh, Jun-ichi Kato, Keiko Takahashi, Kenjiro ...
1991 Volume 20 Issue 7 Pages
1189-1192
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Two β-cyclodextrin bound synthetic siderophores that mimic linear and cyclic desferrioxamines are prepared. These synthetic siderophores form stable 1:1 iron(III) complexes with a Δ-selective coordination and show the growth promotion activity when tested with
Aureobacterium flavescens.
View full abstract
-
Nobuharu Iwasawa, Satoshi Hayakawa, Koichi Isobe, Koichi Narasaka
1991 Volume 20 Issue 7 Pages
1193-1196
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Various β-keto radicals are generated from cyclopropanol derivatives such as 1- or 2-substituted cyclopropanols and a cyclopropanone hemiacetal by the use of manganese(III) 2-pyridinecarboxylate, and their reactions with electron-rich olefins give cross-addition products in good yields.
View full abstract
-
Kiyoshi Otsuka, Akihiko Kobayashi
1991 Volume 20 Issue 7 Pages
1197-1200
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The electrochemical device composed of the H
3PO
4-membrane on which various noble metals were attached, M/H
3PO
4/M′, was demonstrated as a probe of the catalysts for partial oxidation of C
2H
4. On the basis of the results, we have designed the catalyst (Pd–Ru–Graphite–H
3PO
4) for the selective synthesis of CH
3CHO from C
2H
4.
View full abstract
-
Yoshifumi Togo, Nobuo Nakamura, Hiizu Iwamura
1991 Volume 20 Issue 7 Pages
1201-1204
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
N-(Phenoxycarbonyloxy)-2-thiopyridone derivatives were prepared by the reaction of lithium phenoxides with phosgene followed by the reaction with 2-mercaptopyridine
N-oxide and photolyzed to give quantitative yield of phenoxyl radicals.
View full abstract
-
Hiroyasu Sato, Hisanori Shinohara, Makoto Kobayashi, Toshio Kiyokawa
1991 Volume 20 Issue 7 Pages
1205-1208
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The aggregates which absorb near 700 nm, formed on the UV-irradiation of 6-nitro-1′,3′,3′-trimethylspiro[2H-1-benzopyran-2,2′-indoline] in some nonpolar solvents, were found to decompose into monomers, through the anomalous absorption decay at the merocyanine monomer band.
View full abstract
-
Teruaki Mukaiyama, Hajime Asanuma, Iwao Hachiya, Tsunehiro Harada, Shu ...
1991 Volume 20 Issue 7 Pages
1209-1212
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The title chiral Lewis acid is successfully employed in the enantioselective aldol reactions of silyl enol ether of
S-ethyl propanethioate with achiral aldehydes to afford the corresponding aldol-type adducts in a highly stereoselective manner.
View full abstract
-
Yoshiro Yamashita, Shoji Tanaka, Kenichi Imaeda, Hiroo Inokuchi
1991 Volume 20 Issue 7 Pages
1213-1216
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Bis[1,2,5]thiadiazolo-
p-quinobis(1,3-dithiole) (BTQBT) was prepared by a Wittig–Horner reaction of 2-dimethylphosphono-1,3-dithiole with the corresponding dione. BTQBT is a red-violet crystal with a high melting point and the conductivity is unusually high (10
−3 S cm
−1) as a single component. The X-ray structural analysis reveals that the molecule is completely planar and forms a sheet-like network by short S–S contacts.
View full abstract
-
Eiichi Kimura, Mitsuhiko Shionoya, Tsuyoshi Yamauchi, Motoo Shiro
1991 Volume 20 Issue 7 Pages
1217-1220
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The synthesis, X-ray structure, and chemical properties are reported of a new 5 co-ordinate Mn(III) complex with imidazole-pendant cyclam, which has been found to be an efficient catalyst for alkene epoxidation.
View full abstract
-
Hiroyuki Suga, Toshikazu Ibata
1991 Volume 20 Issue 7 Pages
1221-1224
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The reaction of substituted oxazoles with nitrosobenzene gave 2-phenyl-1,2,4-oxadiazolines in good yields through a ring opening of oxazole.
View full abstract
-
Minoru Kinoshita, Philippe Turek, Masafumi Tamura, Kiyokazu Nozawa, Da ...
1991 Volume 20 Issue 7 Pages
1225-1228
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The γ-phase crystal of 2-(4′-nitrophenyl)-4,4,5,5-tetramethyl-4 5-dihydro-1
H−imidazol-1-oxy-3-
N-oxide is shown to become a bulk ferromagnet below about 0.65 K from the measurements of magnetization of magnetic susceptibility and heat capacity.
View full abstract
-
Masahiko Yasumoto, Tohru Tsuchiya, Yoichi Taguchi, Isao Shibuya, Katsu ...
1991 Volume 20 Issue 7 Pages
1229-1232
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
At 800 MPa, 130 °C carbon oxide sulfide condensed with dialkylcyanamide to afford 2,6-bis(dialkylamino)-1,3,5-thiadiazin-4-ones in good yields.
View full abstract
-
Yohji Achiba, Takashi Nakagawa, Yoko Matsui, Shinzo Suzuki, Haruo Shir ...
1991 Volume 20 Issue 7 Pages
1233-1236
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
On single-crystal alkali halide substrates, the C
60 film shows a new band in visible wavelength region. The absorption spectrum of the C
60 film has been extended to vacuum UV region, and several new bands and/or humps were found for the first time.
View full abstract
-
Jiro Toyoda, Kazuhiro Nakasuji, Tomoyuki Kotani, Ichiro Murata, Atsush ...
1991 Volume 20 Issue 7 Pages
1237-1240
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The V-shape correlation between h
vcr and ΔE
o,r of the charge transfer complexes is convenient to judge the gross features of the solid state properties. Using this correlation, we found the 3:2 charge transfer complex of bis(ethylenedithio)dithiapyrene (ETDTPY) and dibenzobarrelenotetracyanoquinodimethane (DBBTCNQ) which showed the columnar structure of alternating trimeric stack of the donor and dimeric stack of the acceptor.
View full abstract
-
Yasuhiro Aoyama, Shin-ichi Nonaka, Tadahiro Motomura, Hiroo Toi, Hisan ...
1991 Volume 20 Issue 7 Pages
1241-1244
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The rigid and unique polyammonium binding site of fully protonated 5,15-bis(2-pyridyl)octaethylporphyrin allows novel discrimination of monoalkyl phosphate vs. dialkylphosphate as well as oxy- and dicarboxylic acids vs. monocarboxylic acid; the former are readily bound with the protonated porphyrin via multi-point interaction, while the latter not.
View full abstract
-
Shigeo Katsumura, Akihiro Kondo, Qingjun Han
1991 Volume 20 Issue 7 Pages
1245-1248
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Optically pure 3-benzyl-4-hydroxymethyl-2-oxazolidinone and 4-benzoyloxymethyl-2-oxazolidinone as chiral serinol synthons were synthesized from optically active glycidol by intramolecular cyclization via 2,3-epoxycarbamates with strict S
N2 behavior.
View full abstract
-
Tetsunori Yoshioka, Noritaka Mizuno, Masakazu Iwamoto
1991 Volume 20 Issue 7 Pages
1249-1252
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Among SnO
2 elements modified by various metal oxides, La
2O
3-loaded SnO
2 element was found to show promising sensing properties to CO
2 in dry air at 673 K, rather high sensitivity and quick response. The sensitivity to CO
2 depended on the operation temperature and the amounts of metal oxides loaded. A linear relationship between the sensitivity and the concentration of CO
2 was observed for La
2O
3-loaded SnO
2 element.
View full abstract
-
Tahei Tomida, Keiji Inagawa, Seizo Masuda
1991 Volume 20 Issue 7 Pages
1253-1254
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The chromatographic separation of La(III) from other light rare earth metal ions [Ce(III), Pr(III), Nd(III), Sm(III)] was achieved by using polyacryloylacetone as a stationary phase. High resolutions were obtained when pH of the eluent (HCl) was decreased stepwise.
View full abstract
-
Shoji Yamanaka, Masayoshi Sarubo, Kazuo Tadanobu, Makoto Hattori
1991 Volume 20 Issue 7 Pages
1255-1258
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
The interlayer surface of γ-zirconium phosphate was chemically modified by the reaction with ethylene oxide. The resulting layered organic derivative can be intercalated with LiClO
4, forming solid solutions over a pretty wide range of the compositions. The ionic conductivities and the Raman spectra of the solid solutions have been studied.
View full abstract
-
Masahiko Yamaguchi, Yukiharu Tsukamoto, Chinatsu Ikeura, Shigeo Nakamu ...
1991 Volume 20 Issue 7 Pages
1259-1262
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Substituted
o-trimethylsilylphenylacetylenes were synthesized by
o-metalation of phenylacetylenes with complex reagent of butyllithium and
t-BuOK, and were polymerized in the presence of a tungsten catalyst giving deeply colored poly(arylacetylene)s. Relationship between the structure of monomers and polymers was examined.
View full abstract
-
Kazunari Akiyoshi, Shigehiko Yamaguchi, Junzo Sunamoto
1991 Volume 20 Issue 7 Pages
1263-1266
Published: 1991
Released on J-STAGE: May 12, 2006
JOURNAL
RESTRICTED ACCESS
Hydrophobic polysaccharide derivatives bearing palmitoyl or cholesterol moieties form self aggregates in an aqueous solution. The critical concentrations to give the polymer aggregates depended on the degree of substitution of the hydrophobic moiety. Cholesterol-bearing pullulan showed a stronger binding for hydrophobic guest molecules and higher colloidal stability compared with the corresponding palmitoyl-bearing one.
View full abstract
