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On the Tributylphosphate-Based Super-Concentrated HCl System
Guo Lin1,2; Huang Kun3; Guo Ran2; He An-qi2; Weng Shi-fu2; Yang Zhan-lan2; Zhao Ying4; Xia Jin-ming5; Xu Yi-zhuang2; Kang Ting-guo1; Wu Jin-guang2

We reported a new super-concentrated hydrochloric acid system prepared by using tri-n-butyl phosphate (TBP)-constructed reversed micelles at ambient temperature and pressure. According to the titration result, the molar ratio of H+ to H2O (denoted as n(H)+/nH(2)O) in the super-concentrated HCl range from 0. 50 to 1. 50 which are higher than that in saturated aqueous HCl bulk solution (0. 28). Significant a moment of hydrochloric acid is confined in W/O reversed micelles. Therefore, the behavior and status of HCl are different from those of conventional bluk solution. FTIR spectroscopic results demonstrate that a significant amount of HCl remains in the molecular form rather than being ionized into H+ and Cl-. Thus, super-concentrated HCl provides an extraordinary chemical environment which may have significant influence on certain substances. We found that the color of the solution is reddish brown when copper ion is dissolved in super-concentrated HCl, while the color of the saturated HCl aqueous solution (37 Wt%) containing copper ion is green. That is to say, the copper ions exist in a special state under the unique chemical environment of super-concentrated HCl. UV-Vis-NIR spectra indicate that both d-d transition band and charge transfer transition band of copper ions in super-concentrated HCl solution underwent significant variations. In addition, copper ions also have obvious influence on the hydrogen bond network among HCl in the super-concentrated HCl solution. Remarkable variation is introduced in the H-Cl stretching band in FTIR spectra.

KeywordTributyl Phosphate (Tbp) Super-concentrated Hcl n(h)+/nh(2)o Copper Ion
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000359272300035
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Document Type期刊论文
Affiliation1.Liaoning Univ Tradit Chinese Med, Coll Pharm, Dalian 116600, Peoples R China
2.Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China
5.Shenyang Dootel Biopharmaceut Res Ctr, Shenyang 110031, Peoples R China
Recommended Citation
GB/T 7714
Guo Lin,Huang Kun,Guo Ran,et al. On the Tributylphosphate-Based Super-Concentrated HCl System[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2015,35(8):2241-2245.
APA Guo Lin.,Huang Kun.,Guo Ran.,He An-qi.,Weng Shi-fu.,...&Wu Jin-guang.(2015).On the Tributylphosphate-Based Super-Concentrated HCl System.SPECTROSCOPY AND SPECTRAL ANALYSIS,35(8),2241-2245.
MLA Guo Lin,et al."On the Tributylphosphate-Based Super-Concentrated HCl System".SPECTROSCOPY AND SPECTRAL ANALYSIS 35.8(2015):2241-2245.
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