Original synthesis of tetraalkylquinones by poly-SRN1 reactions
作者:Patrice Vanelle、Thierry Terme、Michel P Crozet
DOI:10.1016/s0040-4039(00)01069-8
日期:2000.8
A series of complex and highly branched quinones were obtained by reacting an original tetraalkylating agent, 2,3,5,6-tetrachloromethyl-1,4-benzoquinone with primary or secondary nitroalkanes under S(RN)1 reactions conditions. (C) 2000 Elsevier Science Ltd. All rights reserved.
A new class of polymers, which have a double-stranded polybinorbornene skeleton with multilayer planar oligoaryl linkers, defined as polymeric ladderphanes, are synthesized. The structures of these ladderphanes are determined by spectroscopic means. Photophysical studies and time-resolved fluorescence spectroscopic investigations reveal that there is a strong interaction between the chromophore linkers. Thus, Sorel band splitting in the absorption spectrum of the polymer with porphyrin linker (12e), significant fluorescence quenching with oligoaryl linkers (12b-d), and excimer emission with a terphenylene-diethynylene linker (12a) are characteristic photophysical properties of these polymers. Scanning tunneling microscopy shows that polymers 12b and d exhibit a ladder-like morphology and form a supramolecular assembly leading to a two-dimensional ordered array on a highly oriented pyrolytic graphite surface.
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