Improving the quantum yield of luminescence for three-coordinated gold(<sc>i</sc>) TADF emitters by exploiting inversion symmetry and using perhaloaryl ligands

被引：0

作者：

Soldevilla, Ines ^{[1
]}

El-Hachimi, Abdel Ghafour ^{[1
]}

Ramazanov, Ruslan ^{[2
]}

Valiev, Rashid R. ^{[2
]}

Olmos, M. Elena ^{[1
]}

Monge, Miguel ^{[1
]}

Sundholm, Dage ^{[2
]}

Rodriguez-Castillo, Maria ^{[1
]}

Lopez-de-Luzuriaga, Jose M. ^{[1
]}

机构：

[1] Univ La Rioja, Inst Invest Quim Univ La Rioja IQUR, Dept Quim, Complejo Cient Tecnol, Logrono 26006, Spain

[2] Univ Helsinki, Fac Sci, Dept Chem, POB 55,AI Virtasen Aukio 1, FIN-00014 Helsinki, Finland

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2024年 / 12卷 / 34期

基金：

芬兰科学院;

关键词：

ACTIVATED DELAYED FLUORESCENCE; LIGHT-EMITTING-DIODES; CORRELATION-ENERGY; CU(I) COMPLEXES; GOLD(I); EFFICIENT; DESIGN; ELECTROLUMINESCENCE; PHOSPHORESCENCE; APPROXIMATION;

D O I：

10.1039/d4tc02133a

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Herein, we report the synthesis of a new family of extremely efficient TADF three-coordinated gold(I) emitters based on the chelating and bridging abilities of the 1,2,4,5-tetrakis(diphenylphosphino)benzene (tpbz) ligand and the neutral gold(I) [AuR] fragments (R = C6F5 (1), C6Cl2F3 (2), C6Cl5 (3)). Their emission energies appear in the orange range of the spectrum. The quantum yields of the emissions are directly related to the electronegativity of the perhalophenyl groups bonded to the metal center, even when they are not directly involved in the orbitals responsible for the luminescence. DFT and TD-DFT calculations suggest that the symmetry of the solid-state structures facilitates the coupling of the transition dipole moments, which leads to a drastic increase in their quantum yields as the electronic accepting abilities of the perhalophenyl groups decreases.

引用

页码：13255 / 13267

页数：14