The UV-Vis Spectra and Substituent Effect of Organoimido Derivatives of Polyoxometalates
LI Qiang1, 3, WEI Yong-ge2, WANG Yuan2,GUO Hong-you1*
1. College of Science, Beijing University of Chemical Technology, Beijing 100029, China 2. State Key Laboratory for Structural Chemistry of Unstable and Stable Species，College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China 3. Department of Chemical Engineering, Chengde Petroleum College, Chengde 067000, China
Abstract：In the presence of a carbodiimine, i.e. DCC, a series of organoimido derivatives of polyoxometalates have been synthesized via the reaction of [α-Mo8O26]4- with aromatic amines and its hydrochloride salt. Elemental analysis, IR, 1H-NMR and UV-Vis spectra were used to characterize those hybrids, in particular their UV-Vis spectra have been studied. The results show that typical metal-ligand charge transfer (MLCT) transitions occur in the organic-inorganic hybrid molecules. There is a good linear relationship between the shift of UV-Vis absorptions(Δλmax) and conjugation effect of the p-substituted group (σR).
[1] Pope M T. Heteropoly and Isopoly Oxometalates. Berlin: Springer, 1983. [2] Pope M T, Müller A(Eds). Polyoxometalates: From Platonic Solids to Anti-Retroviral Activity. Kluwer, Dordrecht, 1994. [3] Hill C L(Guest Ed.). Chem. Rev., 1998, 98: 8. [4] Pope M T, Müller A(Eds). Polyoxometalate Chemistry: From Topology <i>via</i> Self-Assembly to Application. Kluwer, Dordrecht, 2001. [5] WANG En-bo, HU Chang-wen, XU Lin(王恩波，胡长文，许 林). Introduction to Polyacid Chemistry(多酸化学导论). Beijing：Chemistry Industry Press(北京：化学工业出版社), 1998. 1. [6] Xu Bubin, Wei Yongge, Barnes Charles L, Peng, Zhonghua. Angew. Chem., Int. Ed. Engl., 2001, 40: 2292. [7] Strong J B, Yap G P A, Ostrander R, Liable-Sands L M, Rheingold A, Thouvenot R, Gouzerh P, Maatta E A. J. Am. Chem. Soc., 2000, 122(4): 639. [8] Du Y H, Rheingold A L, Maatta E A . J. Am. Chem. Soc., 1992, 114(1): 345. [9] Wei Y G, Xu B B, Barnes C L, Peng Z H. J. Am. Chem. Soc., 2001, 123(17): 4083. [10] Aaron R Moore, Haidoo Kwen, Alicia M Beatty, Eric A Maatta. Chem. Commun., 2000, 1793. [11] CHANG Jian-hua，DONG Qi-gong(常建华, 董绮功). The Principle and Analysis of the Spectrum(波谱原理及解析). Beijing: Science Press(北京: 科学出版社), 2001. 39. [12] YU Ling-chong(俞凌翀). The Basic Theoretical Organic Chemistry(基础理论有机化学). Beijing: People's Education Press(北京：人民教育出版社), 1981. 396. [13] DENG Bo(邓 勃). The Statistical Processing Method of Analytical Data(分析测试数据的统计处理方法). Beijing: Tsinghua University Press(北京：清华大学出版社), 1994. 112. [14] CHEN Wei, XIAO Yi-hong, ZHAN Ying-ying，et al(陈 葳，肖益鸿，詹瑛瑛，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2004, 24(9): 1096. [15] FENG Guang-zhu, LU Kui, LI He-ping(冯光炷，卢 奎，李和平). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2004, 24(9): 199.
