160319-30-2Relevant academic research and scientific papers
Hyperbranched conjugated polysiloles: Synthesis, structure, aggregation-enhanced emission, multicolor fluorescent photopatterning, and superamplified detection of explosives
Liu, Jianzhao,Zhong, Yongchun,Lam, Jacky W. Y.,Lu, Ping,Hong, Yuning,Yu, Yong,Yue, Yanan,Faisal, Mahtab,Sung, Herman H. Y.,Williams, Ian D.,Wong, Kam Sing,Tang, Ben Zhong
experimental part, p. 4921 - 4936 (2011/11/05)
Hyperbranched poly(2,5-silole)s [hb-P1(m), m = 1, 6] are synthesized for the first time in this work. 1,1-Dialkyl-2,5-bis(4-ethynylphenyl)-3,4- diphenylsiloles [1(m)] were polymerized by TaBr5, affording hb-P1(m) with high molecular weights (M
Reactivity of silole within a core-modified porphyrin environment: Synthesis of 21-silaphlorin and its conversion to carbacorrole
Skonieczny, Janusz,Latos-Grazynski, Lechoslaw,Szterenberg, Ludmila
scheme or table, p. 4861 - 4874 (2009/10/01)
Condensation of 1,1-dimethyl-3,4-diphenyl-2,5-bis(p-tolylhydroxymethyl) silole with pyrrole and p-tolylaldehyde did not form the expected 21,21-dimethyl-2,3-diphenyl-5,10,15,20-tetra(p-tolyl)-21 -silaporphy rin, but rather its reduced derivative, 21-silap
Oligosiloles: First synthesis based on a novel endo-endo mode intramolecular reductive cyclization of diethynylsilanes
Tamao, Kohei,Yamaguchi, Shigehiro,Shiro, Motoo
, p. 11715 - 11722 (2007/10/02)
A general and versatile synthesis of 2,5-difunctional siloles and their conversion into oligosiloles are described. Diethynylsilanes undergo intramolecular reductive cyclization in an endo-endo mode upon treatment with lithium naphthalenide to form 2,5-dilithiosiloles. The 2,5-dilithiosiloles are converted into various 2,5-difunctional siloles by treatment with electrophiles. The resulting 2,5-dibromosilole is further converted into several highly functionalized siloles via palladium-catalyzed cross-coupling reaction or selective mono-lithiation using n-butyllithium in ether. Oligosiloles, from bisiloles to quatersilole, are prepared from certain functional siloles. Oxidative coupling of 2,5-dilithiosilole by use of an Fe(III) complex affords 2,2′-bisilole as yellow crystals. Difunctional oligosiloles, 5,5′-dibromo-2,2′-bisilole and 5,5?-dibromo-2,2′:5′,2″:5″,2? -quatersilole, are prepared by oxidative coupling via higher order cyanocuprate of 2-bromo-5-lithiosilole and 5-bromo-5′-lithio-2,2′-bisilole, respectively. X-ray crystal structures of these bisiloles show highly twisted arrangements between two silole rings with 62-64° of torsion angle. 1H NMR studies on bisiloles show a rapid equilibration between non-coplanar conformers in solution. In UV-visible spectra, nevertheless, all of the oligosiloles have unusually long absorption maxima.
