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Yoshinori Tominaga Takeharu Michioka Kohu Moriyama Akira Hosomi 《Journal of heterocyclic chemistry》1990,27(5):1217-1225
Methyl 3-(N-arylamino)-2-cyano-3-methylthioacrylates 3a-h , which are readily prepared by the reaction of the ketene dithioacetal, methyl 2-cyano-3,3-bis(methylthio)acrylate ( 1 ) with arylamines, was heated at reflux in diphenyl ether to give the corresponding 2-methylthio-4-hydroxyquinoline-3-carbonitriles 4a-h in 14–77% yields. The reaction of 1 with excess aryl amines in diphenyl ether at reflux gave also the corresponding 2-arylamino-4-hydroxyquinoline-3-carbonitriles 6a-d . The 2-methylthioquinoline-3-carbonitriles 4a-h , thus obtained, are useful intermediates for the synthesis of various quinoline derivatives. 相似文献
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Chishiro T Shimazaki Y Tani F Naruta Y 《Chemical communications (Cambridge, England)》2005,(8):1079-1081
An oxo-bridged ferric heme-copper(II) complex, obtained by thermal transformation of the corresponding peroxo-bridged complex, was reacted with an equimolar amount of H2O2 to regenerate the micro-peroxo complex by a ligand exchange from oxo to peroxo, without the formation of a ferryl-oxo species or heme degradation as are observed in general ferric heme-H2O2 reactions. 相似文献
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A single crystal of pyrochlore Pb(2)Re(2)O(6.75) was prepared by hydrothermal synthesis, and its magnetic and transport properties were investigated. Pb(2)Re(2)O(6.75) shows the metallic conduction with an anomalous second-order structural phase transition at T(s)=294 K, in which the magnetization and the structure change similarly to that at 200 K of the superconductor Cd(2)Re(2)O(7). A three-dimensional Ising-like order parameter probed by the atomic displacement suggests that an unconventional spin singlet state is possibly realized in the ground state of Pb(2)Re(2)O(6.75), in which four spins make a quadrumer in order to remove the spin frustration of the pyrochlore lattice. 相似文献
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Toma M Toma K Michioka K Ikezoe Y Obara D Okamoto K Tamada K 《Physical chemistry chemical physics : PCCP》2011,13(16):7459-7466
This paper describes unique plasmonic characteristics of two dimensional (2D) crystalline sheets composed of homogeneous Ag nanoparticles (AgNPs) fabricated by the Langmuir-Schaefer method at an air-water interface. The localized surface plasmon resonance (LSPR) band of the Ag nanosheet was tuned by changing the interparticle distance of AgNPs via the length of the organic capping molecules. Red shift of the LSPR band of the AgNPs sheet followed an exponential law against the interparticle distance in a similar manner to the previous reports of metal nanodisc pairs. However, the shift was much larger and less dependent on the interparticle separation gap. This phenomenon is reasonably interpreted as the long-range interaction of LSPR in the 2D sheet ('delocalized' LSPR) confirmed by simulation using the finite difference time domain (FDTD) method. The FDTD simulation also revealed additional enhancement of local electric fields on the 2D sheet compared to those on the single or paired particles. 相似文献
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Abstract Low dimensional triangle magnetism was studied for transition metal intercalates of incommensurate misfit layer compounds (RS)x[M0.33(NbS2)2] (R = La, Ce, M = Fe, Mn). Magnetization measurements for the single crystals of the Fe intercalated compounds (RS)x[Fe0.33(NbS2)2] show the successive magnetic transition at 14 K and 22 K. The strong frustration appears between two transition temperatures as quasi two-dimensional antiferro-magnetic triangular Ising spin system. In contrast, the Mn compounds (RS)x[Mn0.33(NbS2)2] has very low transition temperature of 3.0 K due to the nature of quasi two-dimensional Heisenberg spin system. 相似文献
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Masugata K. Yamada T. Chishiro E. Matsuyama K. Yatsui K. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1997,25(3):507-509
A new and simple method is proposed to evaluate the energy deposition profile of an intense pulsed ion beam in the target by using a magnetic energy spectrometer. Energy deposition profiles of protons in the cold targets are evaluated by this method, and good agreement has been obtained with the theoretical curves 相似文献
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Liu JG Naruta Y Tani F Chishiro T Tachi Y 《Chemical communications (Cambridge, England)》2004,(1):120-121
A binucleating porphyrin with covalently appended copper chelates having a cross-linked imidazole-phenol group as the novel active site model of cytochrome c oxidase has been prepared, and the dioxygen adduct of its iron(II)-copper(I) complex was spectroscopically characterized. 相似文献
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