Iridium Luminophore Complexes for Unimolecular Oxygen Sensors
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- 作者：Maria C. DeRosa ; Derek J. Hodgson ; Gary D. Enright ; Brian Dawson ; Christopher E. B. Evans ; and Robert J. Crutchley
- 刊名：Journal of the American Chemical Society
- 出版年：2004
- 出版时间：June 23, 2004
- 年：2004
- 卷：126
- 期：24
- 页码：7619 - 7626
- 全文大小：289K
- 年卷期：v.126,no.24(June 23, 2004)
- ISSN：1520-5126
文摘
In this study, a series of novel luminescent cyclometalated Ir(III) complexes has been synthesizedand evaluated for use in unimolecular oxygen-sensing materials. The complexes Ir(C6)2(vacac), 1, Ir(ppy)2(vacac), 2, fac-Ir(ppy)2(vppy), 3, and mer-Ir(ppy)2(vppy), 4, where C6 = Coumarin 6, vacac = allylacetoacetate, ppy = 2-phenylpyridine, and vppy = 2-(4-vinylphenyl)pyridine, all have pendent vinyl or allyl groupsfor polymer attachment via the hydrosilation reaction. These luminophore complexes were characterizedby NMR, absorption, and emission spectroscopy, luminescence lifetime and quantum yield measurements,elemental analysis, and cyclic voltammetry. Complex 1 was structurally characterized using X-raycrystallography, and a series of 1-D (1H, 13C) and 2-D (1H-1H, 1H-13C) NMR experiments were used toresolve the solution structure of 4. Complexes 1 and 3 displayed the longest luminescence lifetimes andlargest quantum efficiencies in solution (
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