Aggregation induced emission in the rotatable molecules: the essential role of molecular interaction
作者:Zhipeng Yu、Yaya Duan、Longhuai Cheng、Zhili Han、Zheng Zheng、Hongping Zhou、Jieying Wu、Yupeng Tian
DOI:10.1039/c2jm32405a
日期:——
Aggregation-induced emission (AIE) compounds, dye2 and dye3, with a rotatable N–N single bond and aza-crown-ether, have been synthesized. The fluorescence intensities of both dyes are very weak in THF, while become extraordinarily strong in a mixture of H2O–THF (v/v 95%). They are increased by 88.9 and 70.7 times, respectively, indicating enhanced blue-green fluorescence emissions. The λem of these two compounds in different states has been well studied. Besides this, dye1 and dye2 were characterized by single crystal X-ray structural determination. The results show that molecular interactions are formed in the particles, which considerably restrict the intramolecular vibration and rotation.
具有可旋转N–N单键和氮杂皇冠醚的聚集诱导发光化合物染料2和染料3已被合成。这两种染料在THF中的荧光强度非常弱,而在H2O–THF混合溶液(体积比95%)中变得异常强烈,分别增强了88.9倍和70.7倍,显示出增强的蓝绿色荧光发射。这两种化合物在不同状态下的发射波长已得到充分研究。此外,染料1和染料2通过单晶X射线结构测定进行了表征。结果表明,颗粒中形成了分子间相互作用,大大限制了分子内的振动和旋转。