Novel Germoles and Their Ladder-Type Derivatives:Modular Synthesis,Luminescence Tuning,and Electroluminescence

作     者：Xiaoshuang Xiang Zhikuan Zhou Xing Wu Zhigang Ni Lizhi Gai Xuqiong Xiao Liwen Xu Zujin Zhao Hua Lu Zijian Guo 

作者机构：College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Educationand Key Laboratory of Organosilicon Material Technology of Zhejiang ProvinceHangzhou Normal UniversityHangzhou 311121 State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640 State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023 

出 版 物：《CCS Chemistry》 (中国化学会会刊（英文）)

年 卷 期：2022年第4卷第12期

页      面：3798-3808页

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：We acknowledge financial support by the National Natural Science Foundation of China(no.21871072 for H.L.)and the Program for High-Level Innovation Team in Universities of Zhejiang Province 

主　　题：germanium organicπ-conjugated molecules ladder-type compounds luminescence 

摘      要：Considerable effort has been devoted to the design of silicon-containingπ-conjugated materials for application in optoelectronic devices and fluorescent ***,the synthesis and spectroscopic tuning of germanium(Ge)-conjugated systems are challenging because of the paucity of synthetically useful ***,we report a simple and effective method of lithium naphthalenide-induced intramolecular cyclization to construct architecturally diverse Ge-containingπ-conjugated molecules,including benzogermoles and their ladder-type derivatives,with high yields of up to 92%.The photophysical properties of these molecules can befinely controlled by the introduction of electrondonating or-withdrawing substituents,and intense luminescence ranging from deep-blue to red regions in the solid state was observed.A quantitative model based on the Hammett constant against the luminescence wavelength showed a good linear correlation,allowing us to reliably predict and design luminescent materials with specific properties for ***,Ge-bridged ladder-type derivatives exhibited high photoluminescence and efficient deep-blue electroluminescence with good color *** believe this study will open a new avenue to organogermanium chemistry and offers greater flexibility for electronic structural tuning.