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Investigation on the trioctylphosphine oxide-based super-concentrated HCl system
Alternative TitleSpectroc. Acta Pt. A-Molec. Biomolec. Spectr.
Guo, R.; Guo, L.; Huang, K.; He, A. Q.; Zhang, J.; Zheng, L. R.; Liu, Y.; Kang, T. G.; Gao, X. X.; Weng, S. F.; Zhao, Y.; Yang, Z. L.; Xu, Y. Z.; Noda, I.; Wu, J. G.
2015
Source PublicationSpectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy
Issue0Pages:288-294
Abstract

We report a new super-concentrated HCl system prepared by using trioctylphosphine oxide (TOPO)-based reverse micelles. The observed molar ratio between acid and water (n(HCl)/n(H2O)) in the super-concentrated HCl are much higher than that in the saturated aqueous HCl solution (0.28). Moreover, FT-IR spectroscopic results reveal that a significant amount of HCI remains in the molecular form rather than being ionized into H+ and Cl-. As a result, two H-Cl stretching bands can be observed in the FT-IR spectrum, The super-concentrated HCI provides a unique chemical environment in which many chemical substances occur in unusual states. For example, the color of super-concentrated HCl solution containing copper ion was found to be reddish brown rather than green as in conventional state. UV-Vis-NIR spectral results indicate that both d-d transition band of Cu2+ and charge transfer band of Cl-Cu in super-concentrated HCl underwent significant variation. Additionally, copper ions bring about remarkable variation on the hydrogen bond network among HCI in the super-concentrated HCI solution as demonstrated by FT-IR spectra. According to the EXAFS results, we suggest that copper ion may occur as HCuCl3 in the super-concentrated HCl. (C) 2014 Elsevier B.V. All rights reserved.

KeywordTrioctylphosphine Oxide (Topo) Super-concentrated Hcl n(H++)/n(H+2o) Copper Ion Solid Acid Catalysts Hydrochloric-acid Lewis-acids Oxidation Phase
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Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11738
Collection研究所(批量导入)
Recommended Citation
GB/T 7714
Guo, R.,Guo, L.,Huang, K.,et al. Investigation on the trioctylphosphine oxide-based super-concentrated HCl system[J]. Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,2015(0):288-294.
APA Guo, R..,Guo, L..,Huang, K..,He, A. Q..,Zhang, J..,...&Wu, J. G..(2015).Investigation on the trioctylphosphine oxide-based super-concentrated HCl system.Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy(0),288-294.
MLA Guo, R.,et al."Investigation on the trioctylphosphine oxide-based super-concentrated HCl system".Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy .0(2015):288-294.
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