Diazaborolyl-boryl push–pull systems with ethynylene–arylene bridges as ‘turn-on’ fluoride sensors
作者:Lothar Weber、Daniel Eickhoff、Jan Kahlert、Lena Böhling、Andreas Brockhinke、Hans-Georg Stammler、Beate Neumann、Mark A. Fox
DOI:10.1039/c2dt30438d
日期:——
bridges between the boron atoms. An assembly (20) consisting of two diazaborolyl-ethynylene–phenylene-boryl units, [C6H4(NCy)(N′)B–CC-1,4-C6H4-BMes2] joined via a 1,4-phenylene unit at the nitrogen atoms (N′) of the diazaborolyl units was also synthesised. The three push–pull systems, 3, 12 and 20, form salts on fluoride addition with the BMes2 groups converted into (BMes2F)− anions. The molecular structures
用–乙炔基合成了两个线性的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–]为供体基团和二甲磺基(–BMes 2)为受体。硼原子之间的–亚苯基-(–C C-1,4-C 6 H 4 –,3)和–乙炔基–噻吩–(–C C-2,5-C 4 H 2 S– 12)桥。由两个二氮杂硼烷基-亚乙炔基-亚苯基-硼基单元[C 6 H 4(NCy)(N')B–C C-1,4-C 6 H 4 -BMes 2组成的组件(20)还合成了经由1,4-亚苯基单元在二氮杂硼烯丙基单元的氮原子(N')处连接的]。三个推挽系统中,3,12和20,形成盐上加成氟化物与BMES 2基团转化成(BMES 2 F)-阴离子。的分子结构3,12和(NBU 4)(12·F) ,通过X射线衍射分析阐明。所述borylated系统3,12和20示出与量子产率环己烷强烈的蓝色发光(Φ FL)0