NIR luminescence of a series of benzoyltrifluoroacetone erbium complexes
NIR luminescence of a series of benzoyltrifluoroacetone erbium complexes
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系列苯甲酰三氟丙酮铒配合物的近红外发光
DOI：
10.1039/c5ra12954k
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发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Li Guangming
中科院分区：
文献类型：
--
作者：
Sun Qingyan;Yan Pengfei;Niu Wanying;Chu Wenyi;Yao Xu;An Guanghui;Li Guangming
合成了五种含氮杂环辅助配体的β-二酮铒配合物：Er（Hbta）3（H2O）2（1），Er（Hbta）3（bpy）（2），Er（Hbta）3（phen）（3），Er（Hbta）3（dpq）（4）和Er（Hbta）3（dppz）（5）。（Hbta =苯甲酰基三氟丙酮，bpy = 2，2 ′-联吡啶，phen = 1，10-菲咯啉，dpq =吡嗪并[2，3-f][1，10]菲咯啉，dppz =联吡啶并[3，2-a：2′，3 ′-c]吩嗪）的晶体结构进行了测定。近红外光谱分析表明，配合物1-5在1535 nm附近均表现出较强的Er（III）离子近红外发光，其中配合物5的最高寿命为4.532 μs，量子产率为3.24 × 10−4，在1.5 μm附近有宽带发射，氮杂环辅助配体吸收并转移能量，导致配体相关的可见光发射完全猝灭。研究了配合物1-5中苯甲酰三氟丙酮、Er（III）离子和辅助配体之间的能量传递过程。
A series of five β-diketone erbium complexes with various azacyclo-auxiliary ligands, namely, Er(Hbta)3(H2O)2 (1), Er(Hbta)3(bpy) (2), Er(Hbta)3(phen) (3), Er(Hbta)3(dpq) (4) and Er(Hbta)3(dppz) (5) (Hbta = benzoyltrifluoroacetone, bpy = 2,2′-bipyridine, phen = 1,10-phenanthroline, dpq = pyrazino[2,3-f][1,10]phenanthroline, dppz = dipyrido[3,2-a:2′,3′-c]phenazine) have been isolated and characterized by X-ray crystallographic analysis. Near-infrared luminescence analysis reveals that all complexes 1–5 exhibit strong NIR luminescence of Er(III) ions around 1535 nm with the highest lifetime of 4.532 μs, quantum yield of 3.24 × 10−4 and broadband emission around 1.5 μm for complex 5, in which the azacyclo-auxiliary ligand absorbs and transfers the energy leading to complete quenching of the ligand-associated visible emission. The energy transfer processes among benzoyltrifluoroacetone, the Er(III) ion and the auxiliary ligands in complexes 1–5 have been investigated.