Pd/TDAE-promoted reductive coupling of aryl bromides (Ar–Br) proceeded in ionic liquids, e.g., BdmimBF4 and BdmimTf2N, to afford the corresponding symmetric biaryls (Ar–Ar) in good yields. Proper choice of ionic liquids and Pd catalysts is indispensable. Recycle use of BdmimTf2N and Pd catalyst was performed successfully.
Quantum Amplified Isomerization in Polymers Based on Triplet Chain Reactions
作者:Lorraine Ferrar、Mark Mis、Joseph P. Dinnocenzo、Samir Farid、Paul B. Merkel、Douglas R. Robello
DOI:10.1021/jo8007786
日期:2008.8.1
Photoinitiated triplet quantum amplified isomerizations (QAI) of substituted Dewar benzene derivatives in polymeric media are reported. The quantum efficiencies and the ultimate extents of reactant-to-product conversions increase significantly with the incorporation of appropriate co-sensitizers; compounds whose triplet energies are similar to or lower than that of the sensitizer and close to that
Auxiliary alkyl chain modulated spin crossover behaviour of [Fe(H<sub>2</sub>Bpz<sub>2</sub>)<sub>2</sub>(C<sub><i>n</i></sub>-bipy)] complexes
作者:Yunnan Guo、Aurelian Rotaru、Helge Müller-Bunz、Grace G. Morgan、Shishen Zhang、Shufang Xue、Yann Garcia
DOI:10.1039/d1dt01787j
日期:——
alkyl chain substituted complexes [Fe(H2Bpz2)2(Cn-bipy)] (pz = pyrazolyl, Cn-bipy = bipyridine alkyl chain diester, n = 3 (3), 4 (4) and 5 (5)) show versatile spin state switching behaviour with different “tail” lengths as revealed by structural and magnetic analyses. The most striking phenomenon is observed for 5 which undergoes an abrupt spintransition accompanied by thermal hysteresis of ca. 10 K
Optical recording media with triplet-sensitzed isomerization
申请人:Farid Y. Samir
公开号:US20050136357A1
公开(公告)日:2005-06-23
The invention relates to an optical recording material comprising: a polymeric matrix; a dewarbenzene derivative reactant capable of undergoing isomerization to a benzene product upon triplet excitation, thereby causing a change in optical properties; and a sensitizer capable of absorbing actinic radiation to cause triplet energy transfer to said reactant, wherein the algebraic sum of the excitation energy of said sensitizer and its reduction potential is at least 0.05 eV less than the oxidation potential of said reactant, thereby precluding one-electron oxidation of said reactant. The invention further relates to an optical device comprising regional variations in concentrations of reactants and products produced by triplet chain isomerization, thereby providing a pattern of intelligence.
Optical recording media with triplet-sensitized isomerization
申请人:Eastman Kodak Company
公开号:US07459263B2
公开(公告)日:2008-12-02
The invention relates to an optical recording material comprising: a polymeric matrix; a dewarbenzene derivative reactant capable of undergoing isomerization to a benzene product upon triplet excitation, thereby causing a change in optical properties; and a sensitizer capable of absorbing actinic radiation to cause triplet energy transfer to said reactant, wherein the algebraic sum of the excitation energy of said sensitizer and its reduction potential is at least 0.05 eV less than the oxidation potential of said reactant, thereby precluding one-electron oxidation of said reactant. The invention further relates to an optical device comprising regional variations in concentrations of reactants and products produced by triplet chain isomerization, thereby providing a pattern of intelligence.