Quantitative Sensitization Efficiencies in NIR-Emissive Homoleptic Ln(III) Complexes Using 2-(5-Methylpyridin-2-yl)-8-hydroxyquinoline

被引：21

作者：

Chong, Bowie S. K. ^{[1
]}

Moore, Evan G. ^{[1
]}

机构：

[1] Univ Queensland, Sch Chem & Mol Biosci, Brisbane, Qld 4072, Australia

来源：

INORGANIC CHEMISTRY | 2018年 / 57卷 / 22期

基金：

澳大利亚研究理事会;

关键词：

NEAR-INFRARED LUMINESCENCE; HIGHLY LUMINESCENT; YTTERBIUM(III) COMPLEXES; TRIDENTATE LIGANDS; NEODYMIUM; SYMMETRY;

D O I：

10.1021/acs.inorgchem.8b01438

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of isostructural lanthanide complexes [Ln(MPQ)(3)] (Ln = Nd, Gd, Er, Yb, Lu) using a monoanionic tridentate methylpyridyl-substituted 8-hydroxyquinoline ligand (MPHQ = 2-(5-methylpyridin-2-yl)-8-hydroxyquinoline) have been prepared and characterized using elemental analysis (CHN), single-crystal X-ray diffraction (XRD), and H-1 NMR spectroscopy. This ligand forms homoleptic charge-neutral lanthanide complexes with three coordinated ligands arranged in an "up-up-down" fashion around the metal center. The photophysical properties of the Nd, Er, and Yb complexes were investigated using absorption and emission spectroscopy, with the latter species displaying efficient sensitization in the Near Infra Red (NIR) region and a photoluminescence quantum yield (PLQY) as high as 1.0% in CH2Cl2 solution. The intersystem crossing and energy-transfer processes involved in the antenna effect were further investigated using transient absorption techniques, which revealed essentially quantitative sensitization efficiencies for the NIR-emitting cations.

引用

页码：14062 / 14072

页数：11

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