Methanol Dynamically Activated Room-Temperature Phosphorescence from a Twisted 4-Bromobiphenyl System  

作　　者：Zhiyi Yuan Jie Wang Lu Chen Lei Zou Xueqing Gong Xiang Ma 

机构地区：[1]Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237

出　　处：《CCS Chemistry》2020年第3期158-167,共10页中国化学会会刊（英文）

基　　金：supported financially by NSFC(21788102,21722603,and 21871083);“Shu Guang’project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation(19SG26);the Innovation Program of Shanghai Municipal Education Commission(2017-01-07-00-02-E00010);Shanghai Municipal Science and Technology Major Project(grant no.2018SHZDZX03);Fundamental Research Funds for the Central Universities.

摘　　要：Crystal engineering is employed widely in developing metal-free room-temperature phosphorescence(RTP)materials,buttheweakresponsiveness inrigid stateand poor selectivity during crystallization limit the research of RTP materials with specific recognition properties.Herein,based on multicomponent crystallization and the deformation of phosphor,we have developed a galactose-functionalized polyhydric compound(BHB)with a twisted 4-bromobiphenyl structure,to realize methanol selectively activated“off–on”RTP system.Methanol molecules selectively formed solvate with BHB and rigidified the crystal structure by enriching intermolecular noncovalent interactions.Meanwhile,the distortion of the biphenyl group facilitated the intersystem crossing process effectively,alongside the heavy-atom effect from the bromo substitute,thereby,activating the RTP of BHB.Thus our current research approach realizes RTPmaterials with selective recognition function by controlling multiple noncovalent interactions such as hydrogen and halogen bonding of molecular systems with structurally distorted phosphors.

关 键 词：room-temperature phosphorescence methanol identification structure deformation SOLVATE 

分 类 号：O62[理学—有机化学]