Studies on Fluorescence Properties of a Novel Acylhydrazone Ligands and Its Sn Metal Complexes
GAO Xue-xi1, WANG Wen-jun1*, LIU Yun-long1, LI Da-cheng2, ZHANG Bing-yuan1, XU Jian-hua3
1. School of Physical Science and Information Technology, Liaocheng University, Liaocheng 252059, China 2. Department of Chemistry, Liaocheng University, Liaocheng 252059, China 3. State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China
Abstract：The molecular structure and spectral properties of a novel acylhydrazone ligands 2-hydroxy-naphthaldehyde-5-chlorosalicyloylhydrazone (H3L) and its Sn metal complexes [(n-Bu2)Sn(HL)] in solution, crystal and thin films were investigated by using steady state and time resolved fluorescence spectrum.. The experimental results show that for H3L, compared with it in solution, the fluorescence intensity is enhanced as it is crystal and thin films, the fluorescence peak is red-shift. and the excited state lifetime is longer. The transition energies of the unimolecule is 240.2 kJ·mol-1. For (n-Bu2)Sn(HL), the fluorescence intensity is stronger as it is crystal than it is in solution and the fluorescence peak is red-shilft, the excited state lifetime is longer. The fluorescence is quenched as it is in thin films. The transition energies of the unimolecule is 230.4 kJ·mol-1. The fluorescence intensity of (n-Bu2)Sn(HL) is four times higher than the H3L. The excited state lifetime of (n-Bu2)Sn(HL) is longer than H3L too. In theory, these phenomena could be explained by that with the increase of the conjugated system and the rigid construction, the fluorescence intensity is stronger and the excited state lifetime is longer.
Key words：Acylhydrazone ligands;Metal complexes;Steady state and time resolved fluorescence spectrum;Molecular structure
高学喜1，王文军1*，刘云龙1，李大成2，张丙元1，徐建华3 . 一种新型酰腙配体及其Sn配合物的荧光特性研究[J]. 光谱学与光谱分析, 2012, 32(01): 147-151.
GAO Xue-xi1, WANG Wen-jun1*, LIU Yun-long1, LI Da-cheng2, ZHANG Bing-yuan1, XU Jian-hua3 . Studies on Fluorescence Properties of a Novel Acylhydrazone Ligands and Its Sn Metal Complexes . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(01): 147-151.
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