Colorful ultralong room-temperature phosphorescence in dual-ligand metal-organic framework  

作　　者：Shuya Liu Yuhang Lin Dongpeng Yan 

机构地区：[1]Beijing Key Laboratory of Energy Conversion and Storage Materials,College of Chemistry,Key Laboratory of Radiopharmaceuticals,Ministry of Education,Beijing Normal University,Beijing100875,China

出　　处：《Chinese Chemical Letters》2023年第7期200-204,共5页中国化学快报（英文版）

基　　金：supported by the Beijing Municipal Natural Science Foundation (No. JQ20003);the National Natural Science Foundation of China (Nos. 21771021, 21822501 and 22061130206);the Newton Advanced Fellowship award (No. NAFR1201285);the Fok Ying-Tong Education Foundation (No. 171008);the Measurements Fund of Beijing Normal University;the State Key Laboratory of Heavy Oil Processing。

摘　　要：Long afterglow organic-inorganic hybrid materials have attracted much attention in recent years and are widely used in information security, biological imaging and many other fields. Since up-conversion long-persistence materials are promising for bio-optical imaging due to their high penetration depth and elimination of autofluorescence background, it is highly desirable to combine down-conversion and up-conversion pathways to obtain smart materials with excitation-dependent tunable room-temperature phosphorescence properties. In this work, a metal-organic framework(Zn-DCPS-BIMB), consisting of divalent zinc ions, o-bis(imidazol-1-ylmethyl)benzene and 4,4-dicarboxydiphenylsulfone, is designed to stabilize triplet excitons, coordinate the emission of different ligands, and endow materials with tunable emission color and up-conversion properties via heavy atoms effects promoting single-triplet orbital coupling and intersystem crossing.

关 键 词：Room temperature phosphorescence Information encryption Metal-organic framework Up-conversion luminescence Organic-inorganic hybrids 

分 类 号：O641.4[理学—物理化学] TB34[理学—化学]