Polymorphism and mechanochromic luminescence of a highly solid-emissive quinoline-β-ketone boron difluoride dye

被引：40

作者：

Tan, Ronghua ^{[1
]}

Lin, Qifei ^{[1
]}

Wen, Ying ^{[2
,3
]}

Xiao, Shuzhang ^{[1
]}

Wang, Sa ^{[1
]}

Zhang, Ronghua ^{[1
]}

Yi, Tao ^{[2
,3
]}

机构：

[1] China Three Gorges Univ, Coll Biol & Pharmaceut Sci, Yichang 443002, Hubei, Peoples R China

[2] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China

[3] Fudan Univ, Collaborat Innovat Ctr Chem Energy Mat, Shanghai 200433, Peoples R China

来源：

CRYSTENGCOMM | 2015年 / 17卷 / 35期

基金：

中国国家自然科学基金;

关键词：

AGGREGATION-INDUCED EMISSION; LARGE STOKES SHIFT; BODIPY DYES; STATE LUMINESCENCE; FLUORESCENCE PROPERTIES; MOLECULAR PACKING; SPECTROSCOPIC PROPERTIES; DEPENDENT EMISSION; OPTICAL-PROPERTIES; CRYSTAL-STRUCTURES;

D O I：

10.1039/c5ce01138h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A highly solid-emissive boron difluoride dye exhibiting polymorphism-dependent and mechanochromic luminescence has been synthesized. Three single-crystal X-ray structures of the polymorphic dye molecule, having different fluorescence emissions, are elucidated. Each polymorph displays different stacking orientations among their chromophore moieties and several different intermolecular interactions, which could be related to their different crystal emissions. The molecule displays piezochromic characteristics, with the fluorescence and quantum yield of both the solid powder and two kinds of crystals being reversibly adaptable to mechanical force and heating. The conversion between the monomer and pi-pi stacking-induced aggregate has been proposed as the mechanism behind the mechanochromism, according to X-ray diffraction measurements and differential scanning calorimetry analyses.

引用

页码：6674 / 6680

页数：7