Raman Spectroscopic Study of the Complex and Quantitative Analysis in the System CuCl2-H2O and FeCl3-H2O
YANG Dan, XU Wen-yi
The Institute of Mineral Resources, Chinese Academy of Geological Sciences, MLR Key Laboratory of Mefallogenesis and Resource Assessment, Beijing 100037, China
Abstract：In the present paper, the Raman peaks of complex in the CuCl2-H2O system and FeCl3-H2O system were studied in detail. In the CuCl2-H2O system, the superimposed characteristic peaks of various complex formed by Cu2+and Cl-(such as [CuCl4]2- and [CuCl6]4-) may be formed the peak of 286 cm-1, and the superimposed characteristic peaks of various complex formed by Cu2+ hydrate([Cu(H2O)4]2+ and [Cu(H2O)6]2+ based ) may be formed the peak of 412 cm-1 ; Through the analysis of peak parameters, we has founded two quantitative relationships : ① The peak intensity ratio (I1/I3 400 or I2/I3 400) of 286 cm-1(or 412 cm-1)and OH stretching Raman spectrum of water (at 3 400 cm-1) and concentration ; ② The integral area of 286 cm-1 (or 412 cm-1 ) and concentration. In the FeCl3-H2O system, 173 and 331 cm-1 might be attributed to [FeCl4]- that is the most common form of FeCl3 complex in aqueous solution. The superimposed characteristic peaks of various complex formed by Fe3+and Cl-(such as [FeCl]2+，[FeCl2]+ etc) may be formed the broad peak of 173 cm-1, and the superimposed characteristic peaks of various complex formed by Fe3+ hydrate([Fe(H2O)4]3+ and [Fe(H2O)6]3+ based) may be formed the broad weak peak behind of 331 cm-1. Through the analysis of peak parameters, we has founded two quantitative relationships : ①The integral area of 331 cm-1(A2) and concentration ; ②The integral area ratio of 173 and 331 cm-1(A1/A2)and concentration.
杨 丹, 徐文艺. CuCl2-H2O体系和FeCl3-H2O体系络合物拉曼光谱研究与溶液拉曼定量分析探索 [J]. 光谱学与光谱分析, 2011, 31(10): 2742-2746.
YANG Dan, XU Wen-yi. Raman Spectroscopic Study of the Complex and Quantitative Analysis in the System CuCl2-H2O and FeCl3-H2O . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(10): 2742-2746.
[1] Cline J, Bodnar R J. Journal of Geophysical Research, 1991, 96: 8113. [2] Cline J S. Arizona Geological Society Digest, 1995, 20: 69. [3] Lowenstern J B, Mahood G A, Rivers M I, et al. Science, 1991, 252: 1405. [4] Heinrich C A, Gunther D, Audetat A, et al. Geology, 1999, 27: 755. [5] Audétat A, Gunther D, Heinrich C A. Science, 1998, 279: 2091. [6] Heinrich C A. Mineralium Deposita, 2005, 39: 864. [7] Nagaseki H, Hayashi K. Geology, 2008, 36: 27. [8] Clark R J H, Williams C S. Inorg. Chem., 1965, 4: 350. [9] Nakagawa I, Shimanouchi T. Spectrochim. Acta, 1964, 20: 429. [10] ZHANG Xiang-lin(张祥麟). Chemical Complex(络合物化学). Beijing: Metallurgy Industry Press(北京：冶金工业出版社)，1979. 102. [11] Sabatini A, Sacconi L. Am. Chem. Chem. Soc., 1964, 86: 17. [12] Beattie I R, Gilson T R, Ozin G A. Chem. Soc., A, 1969, 534. [13] Avery J S, Burbridge C D, Goodgame D M L. Spectrochim. Acta, 1968. 24A: 1721.
