基于ESIPT活性分子构筑深蓝、近红外及单分子白光有机材料

激发态分子内质子转移（ESIPT）有机染料具有独特的光物理性质，是构筑高性能有机光电器件的理想材料。ESIPT分子单一化学结构与窄发光颜色范围很大程度上限制了这类材料在光电器件领域的应用。在本项目中我们将探索ESIPT分子设计新思路，结合分子构型与聚集态结构优化，制备全色ESIPT发光有机材料特别是蓝光、近红外光及单分子白光材料，并推动ESIPT材料的光电应用。主要研究内容包括（1）新型激发态分子内质子转移体系的设计思路探索：设计具有简单分子结构的深蓝到近红外ESIPT发光分子，构筑本征发光和质子转移态发光强度相当的有机单分子白光材料；（2）激发态质子转移发光材料性质与构性关系研究：建立典型模型揭示ESIPT分子本征发光与质子转移态发光之间的联系；（3）激发态质子转移发光材料光电器件应用探索：构筑高性能蓝光及近红外有机发光器件，制备有机单分子白光器件及近红外发光有机晶体激光器件。

Excited-state intramolecular proton-transfer (ESIPT)-active organic dyes have unique photophysical properties, and they are idea candidates for constructing high-performance optoelectronic devices. However, the limitation of molecular structure and emission color greatly hampered the application of these materials in optoelectronics. In this project, we aim at designing novel ESIPT-active materials with emission color ranging from deep blue to near-infrared based on simple molecular structure under the optimization of molecular conformation and/or aggregation packing modes. The major contents of this project are outlined as follows: (1) The exploration of design strategy towards novel ESIPT-active molecules: designing deep blue to NIR fluorescent materials as well as single-molecule white luminescent materials based structurally simple molecules; (2) The structure-property relationship of ESIPT-active materials: disclosing how molecular conformation and packing structure affect the enol form and keto form emissions of ESIPT fluorescent materials; (3) The development of optoelectronic application of ESIPT-active luminescent materials: constructing high-performance blue, NIR, and single-molecule based white light-emitting devices as well as NIR emissive crystal lasing devices.