Supramolecular Clippers for Controlling Photophysical Processes through Preorganized Chromophores
作者:Mohit Kumar、Onumashi Afi Ushie、Subi J. George
DOI:10.1002/chem.201304106
日期:2014.4.22
A novel supramolecular clipping design for influencing the photophysical properties of functional molecular assemblies, by the preorganization (clipping) of chromophores, is described. Several chromophores end functionalized with molecular recognition units were designed. These molecular recognition units serve as handles to appropriately position these systems upon noncovalent interactions with multivalent
描述了一种通过发色团的预组织(剪切)来影响功能分子组装体的光物理性质的新型超分子剪切设计。设计了几种末端被分子识别单元功能化的生色团。这些分子识别单元用作与多价客体分子(超分子削子)发生非共价相互作用时适当定位这些系统的手柄。为了实现这一目标,我们合成了以二聚烯丙基乙二胺(DPA)官能化的1,5-二烷氧基萘(DAN)和萘二酰亚胺(NDI)。这些分子在与二磷酸腺苷或三磷酸腺苷进行非共价钳位时会发生预组织,从而导致预缔合的准分子和混合的(界面)电荷转移(CT)组件。从CT过渡的强圆二色性(CD)信号可以看出,手性客体结合还可以诱导超分子手性,不仅进入单个发色团,而且进入异聚CT组织。这种设计独特的能力通过改变削子的结合强度来影响分子间的相互作用,这使其在控制双分子光物理过程中具有极大的吸引力。