Spectroscopy of europium and terbium pyridine-carboxylates
Spectroscopy of europium and terbium pyridine-carboxylates
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DOI：
10.1016/j.jallcom.2004.03.055
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发表时间：
2004-10
影响因子：
6.2
通讯作者：
V. Zolin;L. Puntus;V. Tsaryuk;V. Kudryashova;J. Legendziewicz;P. Gawryszewska;R. Szostak
中科院分区：
文献类型：
--
作者：
V. Zolin;L. Puntus;V. Tsaryuk;V. Kudryashova;J. Legendziewicz;P. Gawryszewska;R. Szostak
本文研究了铕和铽吡啶羧酸盐异构体异烟酸盐、烟酸盐和吡啶羧酸盐的荧光、荧光激发、红外和拉曼光谱。根据配体的结构和配位类型，分析了配体向Ln ~（3+）传递激发能的途径。在铽和铕化合物的发光激发光谱中，发现了配体内电荷转移带和Tb ~（3+）f-d跃迁带。在吡啶羧酸盐（和吡啶二羧酸盐）中，Tb ~（3+）与氮原子配位，引起f-d带的低频移动，促进Tb ~（3+）的d态发光。
Luminescence, luminescence excitation, IR, and Raman spectra of europium and terbium isomeric pyridine-carboxylates: isonicotinates, nicotinates and picolinates were studied. The ways of the excitation energy transfer from the ligand to Ln3+were analysed in dependence on the structure and the type of co-ordination of ligand. Intraligand charge transfer bands and Tb3+f–d transition bands were identified in the luminescence excitation spectra of terbium and europium compounds. Co-ordination of nitrogen atom by terbium ion in picolinates (and dipicolinates) causes low-frequency shift of the f–d bands and promotes the excitation of luminescence through d-states of Tb3+.