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Inokuma, Yasuhide,Ono, Noboru,Uno, Hidemitsu,Kim, Deok Yun,Noh, Soo Bum,Kim, Dongho,Osuka, Atsuhiro Royal Society of Chemistry 2005 Chemical communications Vol.2005 No.30
<P>Enlargement of the π-electronic network of <I>meso-meso</I>, β-β, β-β triply linked diporphyrin has been exploited by preparing a corresponding dibenzo-fused porphyrin dimer that exhibits a perturbed absorption spectrum and a large two-photon absorption cross section.</P> <P>Graphic Abstract</P><P>A <I>meso</I>-<I>meso</I>, β-β, β-β triply linked dibenzoporphyrin dimer that exhibits a large two-photon absorption (TPA) cross section was prepared in two different ways. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b505340d'> </P>
Inokuma, Yasuhide,Easwaramoorthi, Shanmugam,Jang, So Young,Kim, Kil Suk,Kim, Dongho,Osuka, Atsuhiro WILEY-VCH Verlag 2008 Angewandte Chemie. international edition Vol.47 No.26
<B>Graphic Abstract</B> <P>Go with the glow: A series of meso-oligo(1,4-phenyleneethynylene) substituted subporphyrins shows a significant amplification in absorption coefficient and fluorescence quantum yield as the chain length of the substituents increases (see picture). Particularly, enhancement of the two-photon absorption properties along the series can be characterized by an octupolar effect rather than a conjugation effect. <img src='wiley_img/14337851-2008-47-26-ANIE200801192-content.gif' alt='wiley_img/14337851-2008-47-26-ANIE200801192-content'> </P>
Inokuma, Yasuhide,Kawano, Masaki,Fujita, Makoto Nature Publishing Group, a division of Macmillan P 2011 Nature chemistry Vol.3 No.5
<P>A variety of host compounds have been used as molecular-scale reaction vessels, protecting guests from their environment or restricting the space available around them, thus favouring particular reactions. Such molecular 'flasks' can endow guest molecules with reactivities that differ from those in bulk solvents. Here, we extend this concept to crystalline molecular flasks, solid-state crystalline networks with pores within which pseudo-solution-state reactions can take place. As the guest molecules can spontaneously align along the walls and channels of the hosts, structural changes in the substrates can be directly observed by in situ X-ray crystallography during reaction. Recently, this has enabled observation of the molecular structures of transient intermediates and other labile species, in the form of sequential structural snapshots of the chemical transformation. Here, we describe the principles, development and applications of crystalline molecular flasks.</P>
Yusuke Inokuma,Yoshiaki ?no 한국물리학회 2023 새물리 Vol.73 No.12
The superconductivity in the two-band Hubbard model in which d and p orbitals alternatively sit on the sites of a Bethe lattice with infinite connectivity is investigated on the basis of the dynamical mean-field theory. By solving the Bethe-Salpeter equations, we calculate the pair susceptibilities for the s-wave symmetries with the spin-singlet even-frequency pairing and the spin-triplet odd-frequency pairing and determine the superconducting transition temperature T<SUB>c</SUB> from the divergence of the pair susceptibilities. In the strong correlation regime where the system becomes the Mott insulator at the half-filling, the triplet superconductivity takes place in a slightly doped region while the singlet one takes place in a more doped region. In the both cases, T<SUB>c</SUB> shows a maximum when the on-site Coulomb repulsion between the d electrons is a little larger than the charge transfer energy between the d and p orbitals.
Tsurumaki, Eiji,Inokuma, Yasuhide,Easwaramoorthi, Shanmugam,Lim, Jong Min,Kim, Dongho,Osuka, Atsuhiro WILEY-VCH Verlag 2009 Chemistry Vol.15 No.1
<P>Effective peripheral fabrication methods of meso-aryl-substituted subporphyrins were explored for the first time. Hexabrominated subporphyrins 2 were prepared quantitatively from the bromination of subporphyrins 1 with bromine. Hexaphenylated subporphyrins 3 and hexaethynylated subporphyrins 4 and 5 were synthesized by Suzuki–Miyaura coupling and Stille coupling, respectively, in good yields. X-ray crystal structures of 2 b, 3 b, 4 b, and 5 a revealed preservation of the bowl-shaped bent structures with bowl depths similar to that of 1. Hexaethynylated subporphyrins exhibit large two-photon-absorption cross-sections due to effective delocalization of the conjugated network to the ethynyl substituents.</P> <B>Graphic Abstract</B> <P>β-Substituted subporphyrins: β-Hexabrominated, hexaphenylated, and hexaethynylated (see picture) meso-aryl subporphyrins are reported as the first products of β-peripherally fabricated subporphyrins. X-ray diffraction analysis revealed that all hexasubstituted subporphyrins preserve bowl-shaped structures. Detailed NMR, electrochemical, optical, and theoretical studies were carried out. <img src='wiley_img/09476539-2009-15-1-CHEM200801802-content.gif' alt='wiley_img/09476539-2009-15-1-CHEM200801802-content'> </P>
Unique ultrafast energy transfer in a series of phenylene-bridged subporphyrin–porphyrin hybrids
Oh, Juwon,Sung, Jooyoung,Kitano, Masaaki,Inokuma, Yasuhide,Osuka, Atsuhiro,Kim, Dongho The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.72
<P>A series of phenylene-bridged subporphyrin–Zn(<SMALL>II</SMALL>) porphyrin (SubP–ZnP) hybrid systems undergo extraordinarily fast excitation energy transfer (EET) processes from the SubP to the ZnP, aided by conjugative electronic elongation of the SubP to the phenylene-bridge.</P> <P>Graphic Abstract</P><P>A series of phenylene-bridged subporphyrin–Zn(<SMALL>II</SMALL>) porphyrin (SubP–ZnP) hybrid systems undergo extraordinarily fast excitation energy transfer (EET) processes from the SubP to the ZnP, aided by conjugative electronic elongation of the SubP to the phenylene-bridge. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cc04468a'> </P>