Luminescence of Salen Lanthanide Bimetallic Complexes: Dual Emission and Energy Transfer |
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| Authors: | Rui Jia Ting Gao Yu Yang Wenbin Sun Ruoxi Chen Pengfei Yan Guangfeng Hou |
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| Affiliation: | 1. Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University, No. 74, Xuefu Road, Nangang District, Harbin 150080, P. R. China;2. Key Laboratory of Chemical Engineering Process, & Technology for High‐Efficiency Conversion, College of Heilongjiang Province, No. 74, Xuefu Road, Nangang District, Harbin 150080, P.R. China |
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| Abstract: | The luminescence properties of the tetranuclear bimetallic lanthanide complexes Sm2Eu2 ( 1 ) and Eu2Tb2 ( 2 ), were compared with those of the analogous homometallic complexes [Sm4(μ3‐OH)2(salen)2(acac)6(CH3OH)2] · CH3OH ( 3 ) and [Eu4(μ3‐OH)2(salen)2(acac)6(CH3OH)2] ( 4 ) [H2salen = N, N′‐ethylenebis(salicylideneimine), Hacac = acetylacetonate]. X‐ray crystallographic analysis reveals that complexes 3 and 4 have planar tetranuclear structures. For the Eu2Tb2 configurational isomer, the TbIII ion in complex 2 mainly serves as a sensitizer. The quantum yields and lifetime measurements for 2 support the premise that Ln/Ln energy transfer occurs in such lanthanide bimetallic complexes, along with the usual ligand‐to‐metal triplet energy pathways. Complexes 3 and 4 exhibit the characteristic metal‐centered emission. |
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| Keywords: | Lanthanide bimetallic complex Salen Luminescence Dual emissions Energy transfer |
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