Experimental and Theoretical Studies on Organic D-π-A Systems Containing Three-Coordinate Boron Moieties as both π-Donor and π-Acceptor
作者:Lothar Weber、Daniel Eickhoff、Todd B. Marder、Mark A. Fox、Paul J. Low、Austin D. Dwyer、David J. Tozer、Stefanie Schwedler、Andreas Brockhinke、Hans-Georg Stammler、Beate Neumann
DOI:10.1002/chem.201102059
日期:2012.1.27
different types of three‐coordinate boron moieties serving as both π‐donor and π‐acceptor. Molecular structures of 2, 3, and 4 were determined by single‐crystal X‐ray diffraction. Photophysical studies on these systems reveal blue‐green fluorescence in all compounds. The Stokes shifts for 1, 2, and 3 are notably large at 7820–9760 cm−1 in THF and 5430–6210 cm−1 in cyclohexane, whereas the Stokes shift for
四个线性π共轭体系,其中1,3-二乙基-1,3,2-苯并二氮杂硼烯丙基[C 6 H 4(NEt)2 B]的一端为π-供体,而二聚间苯二甲酰(BMes 2)为π-受体在另一端进行了合成。这些不寻常的推挽系统包含亚苯基( 1,4-C 6 H ^ 4 ; 1),亚联苯基( 4,4' - (1,1'--C 6 H ^ 4)2 ; 2),噻吩( 2,5-C 4 H ^ 2小号 ; 3),和二噻吩( 5,5' - (2,2'--C 4 H ^ 2 S)2 ; 4)作为π共轭桥和不同类型的三坐标硼部分同时充当π供体和π受体。的分子结构2,3和4是由单晶X射线衍射来确定。对这些系统的光物理研究表明,所有化合物均具有蓝绿色荧光。斯托克斯位移为1,2,和3是在7820-9760厘米特别是大-1的THF和5430-6210厘米-1中环己烷,而斯托克斯位移为4在THF中为5510cm -1,在环己烷中为2450cm