Clustering-triggered Emission of Nonaromatic Polymers with Multitype Heteroatoms and Effective Hydrogen Bonding  

作　　者：KAUSAR Fahmeeda YANG Tianjia ZHAO Zihao ZHANG Yongming YUAN Wang Zhang 

机构地区：[1]School of Chemistry and Chemical Engineering,Frontiers Science Center for Transformative Molecules,Shanghai Key Lab of Electrical Insulation and Thermal Aging,Shanghai Jiao Tong University,Shanghai,200240,P.R.China

出　　处：《Chemical Research in Chinese Universities》2021年第1期177-182,共6页高等学校化学研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.51822303,52073172);the Natural Science Foundation of Shanghai of China(No.20ZR1429400).

摘　　要：Nonconventional luminophores without large conjugated structures are attracting increasing attention for their unique aggregation-induced emission(AIE)properties and promising applications in optoelectronic and biomedical areas.The emission mechanism,however,remains elusive,which makes rational molecular design difficult.Recently,we proposed the clustering-triggered emission(CTE)mechanism to illustrate the emission.The clustering of electron-rich nonconventional chromophores withπand/or n electrons and consequent electron cloud overlap is crucial to the luminescence.Herein,based on the CTE mechanism,nonaromatic polymers containing multitype heteroatoms(i.e.,O,N,and S)and involving amide(CONH)and sulfide(-S-)groups were designed and synthesized through facile thiol-ene click chemistry.The resulting polymers demonstrated typical concentration-enhanced emission,AIE phenomenon,and excitation-dependent emission.Notably,compared with polysulfides,these polymers exhibited much higher solid-state emission efficiencies,because of the incorporation of amide units,which contributed to the formation of emissive clusters with highly rigidified conformations through effective hydrogen bonding.Furthermore,distinct persistent cryogenic phosphorescence or even room temperature phosphorescence(RTP)was noticed.These photophysical behaviors can well be rationalized in terms of the CTE mechanism,indicating the feasibility of rational molecular design and luminescence regulation.

关 键 词：Clustering-triggered emission Aggregation-induced emission Nonaromatic polymer HETEROATOM PHOSPHORESCENCE 

分 类 号：O62[理学—有机化学]