Deep-red and near-infrared organic lasers based on centrosymmetric molecules with excited-state intramolecular double proton transfer activity  

作　　者：Chang-Cun Yan Zong-Lu Che Wan-Ying Yang Xue-Dong Wang Liang-Sheng Liao 

机构地区：[1]Macao Institute of Materials Science and Engineering,Macao University of Science and Technology,Taipa,Macao SAR 999078,China [2]Institute of Functional Nano&Soft Materials,Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Joint International Research Laboratory of Carbon-Based Functional Materials and Devices,Soochow University,Suzhou 215123,China [3]Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials,Jiangsu Key Laboratory of Advanced Negative Carbon Technologies,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China.

出　　处：《Opto-Electronic Advances》2023年第7期19-28,共10页光电进展（英文）

基　　金：We are grateful for financial supports from the National Natural Science Foundation of China(Nos.52173177,21971185,22105139);Fundação Universidade de Ciência e Tecnologia de Macao(No.0006/2021/AKP);the Natural Science Foundation of Jiangsu Province(No.BK20221362);the Science and Technology Support Program of Jiangsu Province(No.TJ-2022-002).This project is also funded by Suzhou Key Laboratory of Functional Nano&Soft Materials,Collaborative Innovation Center of Suzhou Nano Science&Technology,the 111 Project,Joint International Research Laboratory of Carbon-Based Functional Materials and Devices,and Soochow University Tang Scholar.

摘　　要：Organic lasers that emit light in the deep-red and near-infrared(NIR)region are of essential importance in laser communication,night vision,bioimaging,and information-secured displays but are still challenging because of the lack of proper gain materials.Herein,a new molecular design strategy that operates by merging two excited-state intramolecular proton transfer-active molecules into one excited-state double proton transfer(ESDPT)-active molecule was demonstrated.Based on this new strategy,three new materials were designed and synthesized with two groups of intramolecular resonance-assisted hydrogen bonds,in which the ESDPT process was proven to proceed smoothly based on theoretical calculations and experimental results of steady-state and transient spectra.Benefiting from the effective six-level system constructed by the ESDPT process,all newly designed materials showed low threshold laser emissions at approximately 720 nm when doped in PS microspheres,which in turn proved the existence of the second proton transfer process.More importantly,our well-developed NIR organic lasers showed high laser stability,which can maintain high laser intensity after 12000 pulse lasing,which is essential in practical applications.This work provides a simple and effective method for the development of NIR organic gain materials and demonstrates the ESDPT mechanism for NIR lasing.

关 键 词：excited-state intramolecular proton transfer organic laser near-infrared emission molecular design 

分 类 号：TN248[电子电信—物理电子学]