Deuteration isotope effect on nonradiative transition of fac-tris (2-phenylpyridinato) iridium (III) complexes

被引：47

作者：

Abe, Taichi ^{[1
]}

Miyazawa, Akira ^{[1
]}

Konno, Hideo ^{[2
]}

Kawanishi, Yuji ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058565, Japan

[2] Natl Inst Adv Ind Sci & Technol, Res Inst Innovat Sustainable Chem, Tsukuba, Ibaraki 3058565, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2010年 / 491卷 / 4-6期

关键词：

RADIATIONLESS TRANSITION; TEMPERATURE-DEPENDENCE; CHARGE-TRANSFER; EMISSION; LUMINESCENCE; DEUTERIATION; SPECTRA; EFFICIENCY; DEVICES; STATE;

D O I：

10.1016/j.cplett.2010.03.084

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Deuterated 2-phenylpyridine and coordinated iridium(III) complexes Ir(ppy-h(8))(n)(ppy-d(8))(3) (n)(n = 0, 1, 2, 3) have been prepared. Both the relative and absolute phosphorescent quantum yields and the emission decay times of dilute solutions have been studied around room temperature. Phosphorescent quantum yields of fully deuterated Ir(ppy-d(8))(3) have ranged from 0.80 to 0.93 in several solvents, which are higher than that of normal complex Ir(ppy-h(8))(3). Ligand deuteration increases the quantum yield. On the other hand solvent deuteration has almost no effect. Nonradiative rate constants show little temperature dependence for the both complexes (k(nr) = 1.4 +/- 0.3 x 10(5) s(-1) and 0.95 +/- 0.2 x 10(5) s (1)) at 273-308 K. (C) 2010 Elsevier B. V. All rights reserved.

引用

页码：199 / 202

页数：4

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