Direct identification of energy transfer mechanism in Ce^(Ⅲ)-Mn^(Ⅱ)system by constructing molecular heteronuclear complexes  

作　　者：Huanyu Liu Gang Yu Ruoyao Guo Hao Qi Jiayin Zheng Tong Jin Zifeng Zhao Zuqiang Bian Zhiwei Liu 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China

出　　处：《Chinese Chemical Letters》2025年第2期156-160,共5页中国化学快报(英文版)

基　　金：financial support from the National Key R&D Program of China(Nos.2022YFB3503702,2023YFB3506901,2021YFB3501800);the National Natural Science Foundation of China(Nos.92156016,62104013,22071003)。

摘　　要：Sensitization of metal-centered forbidden transitions is of great significance.Solid MnII-based phosphors with d-d forbidden transition sensitized by CeIIIwith d-f allowed transition are promising light conversion materials,but the energy transfer mechanism in CeIII-MnIIis still in dispute for the uncertainty of distances between metal centers.Herein,for the first time,we explored the energy transfer mechanism in two well-designed luminescent heteronuclear complexes with clear crystal structures,i.e.,Ce-N8-Mn and Ce-N2O6-Mn(N8=1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosane;N2O6=4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane).Short distances between metal centers facilitate efficient energy transfer from CeIIIto MnIIin both complexes,resulting in high photoluminescence quantum yield up to unity.After systematic study of the two heteronuclear complexes as well as two reference complexes Ce(N8)Br3and Ce(N2O6)Br3,we concluded that dipole-quadrupole interaction is the dominant energy transfer mechanism in the heteronuclear complexes.

关 键 词：Dipole-quadrupole interaction Förster resonance energy transfer Manganese complex Cerium complex PHOTOLUMINESCENCE 

分 类 号：TQ422[化学工程] O641.4[理学—物理化学]