Piezochromism, acidochromism, solvent-induced emission changes and cell imaging of D-π-A 1,4-dihydropyridine derivatives with aggregation-induced emission properties
作者:Yunxiang Lei、Dongliang Yang、Huaijie Hua、Chunhui Dai、Lianhui Wang、Miaochang Liu、Xiaobo Huang、Yang Guo、Yixiang Cheng、Huayue Wu
DOI:10.1016/j.dyepig.2016.06.008
日期:2016.10
original samples with the dicyanomethylene and vinylcyanoacetate groups do not show fluorescence color changes in response to external force stimuli, whereas the compound containing the 2-methylene-1H-indene-1,3(2H)-dione unit exhibits reversible piezochromism and solvent-induced emission changes due to the transformation between the crystalline and amorphous states, which can be ascribed to their different
合成了三种具有聚集诱导发射特性的D-π-A1,4-二氢吡啶衍生物。该分子由4-(二甲基氨基)苯乙烯基作为电子供体基团和不同的端基组成,二氰基亚甲基,乙烯基氰基乙酸酯和2-亚甲基-1 H-茚-1,3(2 H)-二酮作为电子受体。 , 分别。这些目标化合物在固态下显示出不同的刺激响应荧光性质。具有二氰基亚甲基和乙烯基氰基乙酸酯基团的原始样品没有显示出响应于外力刺激的荧光颜色变化,而含有2-亚甲基-1 H-茚-1,3(2 H-二酮单元由于结晶态和非晶态之间的转换而表现出可逆的压致变色和溶剂诱导的发射变化,这可以归因于它们在固态下的不同分子堆积模式。此外,由于质子化的不同部位,这些化合物显示出不同的酸/碱诱导的固态荧光转换特性。此外,所有衍生物都可以制成生物相容性荧光纳米粒子,并用于MCF-7细胞成像。