Thermally Activated Delayed Fluorescent Binuclear Copper(I) Alkynyl Complexes with Cuprophilic Interactions

Zhang, Xi1,4; Song, Jia-Xi1,4; Chang, Xiaoyong2; Li, Kai3; Chen, Yong1,4

2024-03-01

10.1002/chem.202304224

CHEMISTRY-A EUROPEAN JOURNAL   影响因子和分区

0947-6539

1521-3765

["Copper(I)-based thermally activated delayed fluorescence (TADF) emitters have been conceived to be promising candidates for display and lighting applications because of their multifarious structures and strong photoluminescence. Herein a string of binuclear Cu(I) complexes bearing pronounced cuprophilic interactions have been designed and synthesized. [Cu2(dppb)2(mu 2-eta 1-C equivalent to C-Ph)2] (1 a) and [Cu2(dppb)2(mu 2-eta 1-C equivalent to C-PPXZ)2] (1 b) display photoluminescence quantum yields of up to 67 % in doped films and solid states via TADF and exhibit reversible bicolor luminescence switching upon mechanical stimuli. Computational studies manifest that the metal-to-ligand charge transfer predominant transitions ensure a small energy splitting (Delta EST) between the lowest singlet (S1) and triplet (T1) excited states and cuprophilic interactions promote the spin-orbit coupling (SOC), favoring the reverse intersystem crossing (RISC) process. This study provides a new strategy for the construction of stimuli-responsive metal-based TADF materials.","Binuclear copper(I) alkynyl complexes with ultrashort Cu-Cu distance are designed and synthesized, which show thermally activated delayed fluorescence (TADF) and mechanochromic luminescence (MCL). The cuprophilic interactions can promote spin-orbit coupling and ligand engineering can achieve adjustable luminescence, which provide design ideas for the building of stimuli-responsive Cu(I)-based TADF materials.+ image"]

binuclear Cu complexes alkynyl ligands metal TADF cuprophilic interaction mechanochromic luminescence

SCI ; EI

英语

其他

Beijing Municipal Science & Technology Commission[Z211100007921020] ; null[22175191]

Chemistry

Chemistry, Multidisciplinary

WOS:001183883600001

WILEY-V C H VERLAG GMBH

CHEMISTRY

2-s2.0-85187538229

Web of Science

1.Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat & CAS HK, Beijing 100190, Peoples R China
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
3.Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Zhang, Xi,Song, Jia-Xi,Chang, Xiaoyong,et al. Thermally Activated Delayed Fluorescent Binuclear Copper(I) Alkynyl Complexes with Cuprophilic Interactions[J]. CHEMISTRY-A EUROPEAN JOURNAL,2024,30(25).

Zhang, Xi,Song, Jia-Xi,Chang, Xiaoyong,Li, Kai,&Chen, Yong.(2024).Thermally Activated Delayed Fluorescent Binuclear Copper(I) Alkynyl Complexes with Cuprophilic Interactions.CHEMISTRY-A EUROPEAN JOURNAL,30(25).

Zhang, Xi,et al."Thermally Activated Delayed Fluorescent Binuclear Copper(I) Alkynyl Complexes with Cuprophilic Interactions".CHEMISTRY-A EUROPEAN JOURNAL 30.25(2024).