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

作者：Abe Taichi; Miyazawa Akira; Konno Hideo; Kawanishi Yuji^*

来源：Chemical Physics Letters, 2010, 491(4-6): 199-202.

DOI：10.1016/j.cplett.2010.03.084

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.

• 出版日期2010-5-17