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Volumn 44, Issue 8, 2005, Pages 2964-2972

Thermodynamics of the as(III)-thiol interaction: Arsenite and monomethylarsenite complexes with glutathione, dihydrolipoic acid, and other thiol ligands

Author keywords

[No Author keywords available]

Indexed keywords

ARSENIC; ARSENIC TRIOXIDE; DIHYDROLIPOATE; GLUTATHIONE; THIOL DERIVATIVE;

EID: 17444432962     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic048694q     Document Type: Article
Times cited : (173)

References (41)
  • 2
    • 17444427521 scopus 로고    scopus 로고
    • http://www.atsdr.cdc.gov/clist.html (accessed March 2005).
  • 28
    • 17444429081 scopus 로고    scopus 로고
    • note
    • Similar parameters give a good fit to near-UV absorption spectra of GSH → arsenite titrations (Supporting Information), but the fit is poor at larger excess of GSH, which might be due to spectral contributions from an increasing amount of the GSH thiolate anion.
  • 29
    • 17444399517 scopus 로고    scopus 로고
    • note
    • 2:3 value corresponds to a clear minimum in the sum of squares residuals in the Specfit analysis of this titration data.
  • 30
    • 17444425518 scopus 로고    scopus 로고
    • note
    • Rapid continuous stirring of the ITC cell led to equilibration of these samples between injections, as indicated by the return to baseline and the absence of baseline drift over the course of As(III) → GSH titrations.
  • 31
    • 17444391477 scopus 로고    scopus 로고
    • note
    • The GSH → arsenite ITC data eventually return to a smaller heat of dilution at higher molar ratios, but there is some discrepancy with the fit, presumably because of the large deviation from ideal solution behavior at high titrant (solute) concentrations.
  • 32
    • 17444409126 scopus 로고    scopus 로고
    • note
    • When K is small, there is a larger uncertainty in the corresponding value of ΔH, which is particularly true for the intermediate 1:2 species.
  • 37
    • 17444390290 scopus 로고    scopus 로고
    • note
    • The DHLA carboxylate is separated by four additional methylenes from the thiols and is not expected to effect dithiolate coordination to As(III).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.