Investigation of Charge-Transfer Interaction in Mixed Stack Donor–Acceptor Cocrystals Toward Tunable Solid-State Emission Characteristics
作者:Rabia Usman、Arshad Khan、Mingliang Wang、Yi Luo、Weiwei Sun、Hao Sun、Cunbin Du、Nongyue He
DOI:10.1021/acs.cgd.8b00852
日期:2018.10.3
The formation of three mixed binary charge transfer (CT) cocrystals with tunable photoluminescence behavior featuring both CT interaction and directional hydrogen bonding is presented. Our strategy consists of the CT induced cocrystallization of three polycyclic (naphthalene, anthracene, and pyrene) carrying α-cyanostilbene (CS) derivatives, namely, 3-(naphthalene-2-yl)-2-(p-tolyl) acrylonitrile (NPA)
提出了具有可调节的光致发光行为的三个混合的二元电荷转移(CT)共晶体的形成,该行为具有CT相互作用和定向氢键。我们的策略包括CT诱导的三个带有α-氰基二苯乙烯(CS)衍生物的多环化合物(萘,蒽和pyr)的共结晶,即3-(萘-2-基)-2-(p-甲苯基(NPA),3-(蒽-9-基)-2-苯基丙烯腈(APA)和2-(4-甲氧基苯基)-3-(py-1-基)丙烯腈(MPA)作为供体( D)用1,2,4,5-四氰基苯(TCNB)作为受体(A)。通过各种分析技术(如X射线衍射数据,振动光谱,漫反射吸收光谱,荧光性质以及荧光量子产率和寿命)详细探测了所制备的共晶体,从而确认了CT络合物的形成。复杂IA具有混合堆栈排列(D–A–D–A–D),而IIA和IIIA显示(DAD --- DAD)堆栈排列。CT产物显示出独特的可调发射颜色和光致发光特性,这与供体和受体部分之间的CT相互作用,以及供体分子的多环部分