Highly Efficient DCL, UCL, and TPEF in Hybridized Ln-Complexes from Ir-Metalloligand  

作　　者：Jun-Ting Mo Zheng Wang Peng-Yan Fu Lu-Yin Zhang Ya-Nan Fan Mei Pan Cheng-Yong Su 

机构地区：[1]MOE Laboratory of Bioinorganic and Synthetic Chemistry,Lehn Institute of Functional Materials,School of Chemistry,Sun Yat-Sen University,Guangzhou 510275 [2]State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050 [3]State Key Laboratory of Applied Organic Chemistry,Lanzhou University,Lanzhou 730000

出　　处：《CCS Chemistry》2021年第2期729-738,共10页中国化学会会刊（英文）

基　　金：supported by NSFC(21771197,21821003,21720102007,and 21890380);Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(2017BT01C161),and FRF for the Central Universities.

摘　　要：In molecular level lanthanide complexes,it is still challenging to achieve near-infrared(NIR)down-conversion luminescence(DCL)and visible up-conversion luminescence(UCL)efficiently under ambient conditions.By delicate design of hybridized iridium−europium−ytterbium(Ir–Eu–Yb)trimetallic complexes from an Ir-metalloligand,DCL and UCL emissions with opposite photon conversion pathways were achieved simultaneously in one integrated system.In detail,three different types of energy transfer(ET)and photoluminescence(PL)were detected,as follows:(1)Highly sensitized NIR-DCL from Yb(III)center via ETIr→Eu→Yb,which gave the longest decay lifetime(553μs)at room temperature ever reported in solid-state Yb-complexes.(2)Unprecedented UCL red emission from Eu(III)center via ETYb→Eu using 980 nm continuous wavelength(CW)laser excitation,which required ultralow energy threshold(0.616W/cm2).(3)Two-photon excited fluorescence(TPEF)via ETIr→Eu using femtosecond pulsed laser excitation.This exquisite module of“one stone,three birds”provides a new stimulus in the design and application of multifunctional UCL/DCL/TPEF optical materials under ambient conditions.

关 键 词：NIR up-conversion down-conversion two-photon d–f heteronuclear 

分 类 号：O61[理学—无机化学]