Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Nakanishi A"'
Publikováno v:
Bulletin of the Chemical Society of Japan. 74:979-988
A series of the longest class of oligothiophenes extended at intervals of seven thiophene units from the 6-mer up to the 48-mer has been synthesized by a combination of the random Eglinton coupling reaction of mono- and di-ethynylsexithiophenes and a
Autor:
Kazuki Nakanishi, Naohiro Soga
Publikováno v:
Bulletin of the Chemical Society of Japan. 70:587-592
Phase separation and gelation behaviors have been studied for acid-catalyzed, alkoxide-based silica systems containing poly(ethylene oxide), PEO. In order to clarify the role of PEO in a phase-separating sol–gel system, the effects of the molecular
Autor:
Kikuko Hayamizu, Hiro Matsuda, Hajime Kawanami, Naoto Kikuchi, Takanori Doi, Hachiro Nakanishi, Shuji Okada
Publikováno v:
Bulletin of the Chemical Society of Japan. 68:791-802
The effects of monomer alignment on the solid-state polymerizations of five octatetraynes and a butadiyne to produce polydiacetylenes were studied. Structural relaxations of the resulting polymers were found to occur over long time intervals. Solid-s
Publikováno v:
Bulletin of the Chemical Society of Japan. 67:1327-1335
Phase separation and gelation behaviors have been studied for the acid-catalyzed, alkoxide-based silica systems containing poly(ethylene oxide) (PEO) with an average molecular weight of 100000. Gel...
Autor:
Naoto Kikuchi, Masaaki Otsuka, Hachiro Nakanishi, Masao Kato, Kikuko Hayamizu, Shuji Okada, Hiro Matsuda
Publikováno v:
Bulletin of the Chemical Society of Japan. 67:455-461
ω-(1,3-Butadiynyl) substituted 1-alkanol and alkanoic acid were synthesized and their polymerization behavior in crystals and in Langmuir–Blodgett (LB) films were investigated. Polymerization, using UV or γ-ray irradiation or thermal treatment, r
Publikováno v:
Bulletin of the Chemical Society of Japan. 64:1283-1288
Sol–gel transition of mixtures of colloidal silica–water soluble organic polymer (sodium polystyrenesulfonate) has been investigated by the small-angle X-ray scattering technique. With proceeding gelation, an increase of the intensity at small-an
Publikováno v:
Bulletin of the Chemical Society of Japan. 64:857-863
Structures of the polymers obtained by solid-state polymerization of diyne, triyne, and tetraynes substituted by long chain alkyl groups were investigated by solid-state 13C NMR spectroscopy. Assignment of all peaks in the spectra were made successfu
Publikováno v:
Bulletin of the Chemical Society of Japan. 63:3595-3600
α-Bromooximes such as α-bromoacetophenone oxime and ethyl 3-bromo-2-(hydroxyimino)propanoate react with enamines to give 5,6-dihydro-4H-1,2-oxazines in good yields. Dihydro-1,2-oxazine derivatives are also obtained by the reaction of α-bromooximes
Publikováno v:
Bulletin of the Chemical Society of Japan. 61:3553-3557
Molecular structures of the title compounds, which belong to the class of peri-substituted naphthalenes, have been determined by means of X-ray diffraction. Tetraisopropyl 1,1′-(1,8-naphthylene)bis[1H-1,2,3-triazole-4,5-dicarboxylate] (1), monoclin
Autor:
Koichiro Nakanishi, Michio Kurata
Publikováno v:
Bulletin of the Chemical Society of Japan. 33:152-157
The solution density of polyvinyl alcohol dilute aqueous solution is measured by the use of the method of floating equilibria. This method is proved to be useful for the purpose of precise density and concentration determination of PVA dilute solutio