Characterization of Ir(ppy)3 and [Ir(ppy)2 bpy] + by infrared, Raman spectra and surface-enhanced Raman scattering

Szu Hsueh Lai, Jung Wei Ling, Yu Min Huang, Min Jie Huang, Chien Hung Cheng, I. Chia Chen

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)


The Raman and infrared spectra of fac-tris(2-phenylpyridinato-N,C2′) iridium(III), Ir(ppy)3 and surface-enhanced resonance Raman spectra of bis(2-phenyl pyridinato-) (2,2′bipyridine) iridium (III), [Ir(ppy) 2 (bpy)]+ cation were recorded in the wavenumber range 150-1700 cm-1, and complete vibrational analyses of Ir(ppy) 3 and [Ir(ppy)2 (bpy)]+ were performed. Most of the vibrational wavenumbers were calculated with density-functional theory agree with experimental data. On the basis of the results of calculation and comparison of the spectra of both complexes and their analogue [Ru(bpy) 3]2+, we assign the vibrational wavenumbers for metal-ligand modes; metal-ligand stretching wavenumbers are 277/307 and 261/236 cm-1 for Ir(ppy)3, and 311/324, 257/270, 199/245 cm -1 for [Ir(ppy)2 bpy]+. Surface-enhanced Raman scattering spectra of [Ir(ppy)2 bpy]2+ were measured at two wavelengths on the red and blue edges of the low-energy metal-to-ligand charge-transfer band. According to the enhanced Raman intensities for the vibrational modes of both ligands ppy and bpy, the unresolved charge-transfer band is deduced to consist of charge-transfer transitions from the triplet metal to both ligands ppy and bpy.

頁(從 - 到)332-338
期刊Journal of Raman Spectroscopy
出版狀態Published - 2011 3月

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 光譜


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