Multi-Stimulus-Responsive Fluorescent Properties of Donor-蟺-Acceptor Indene-1,3-dionemethylene-1,4-dihydropyridine Derivatives

详细信息    查看全文

• 作者：Yunxiang Lei ; Yanze Liu ; Yang Guo ; Jiuxi Chen ; Xiaobo Huang ; Wenxia Gao ; Lebin Qian ; Huayue Wu ; Miaochang Liu ; Yixiang Cheng
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：October 8, 2015
• 年：2015
• 卷：119
• 期：40
• 页码：23138-23148
• 全文大小：594K
• ISSN：1932-7455

文摘

Three donor (D)-蟺-acceptor (蟺A) indene-1,3-dionemethylene-1,4-dihydropyridine (IDM-DHP) derivatives with triphenylamine (TPA)/bis(diphenylamino)triphenylamine (BDPA-TPA) end groups were designed and synthesized. These target compounds with highly twisted conformations showed aggregation-induced emission enhancement properties in their THF/water mixtures due to the restriction of intramolecular rotation, and distinct piezofluorochromic (PFC) properties in the solid state. Interestingly, solvent-induced emission changes similar to those resulting from PFC properties can be achieved by a simple dissolution鈥揹esolvation process in different solvent systems, such as chloroform, THF, and dichloromethane. X-ray diffraction experiments revealed that the transformations between crystalline and amorphous states were responsible for the PFC properties and solvent-induced emission changes. Moreover, these compounds exhibited remarkable and reversible acid/base-induced fluorescence switching properties in both solution and the solid state. The results indicate that the IDM-DHP derivatives with a TPA/BDPA-TPA unit exhibit intriguing multi-stimulus-responsive fluorescent behaviors. The current study will help researchers to design and synthesize more aggregation-induced emission/aggregation-induced emission enhancement-active multifunctional stimulus-responsive fluorescent materials.