Gold(III) Chlorohydroxo Complexes in Aqueous Solutions at Increased Temperatures

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Gold(III) Chlorohydroxo Complexes in Aqueous Solutions at Increased Temperatures. / Mironov, I. V.; Kharlamova, V. Yu.

In: Russian Journal of Inorganic Chemistry, Vol. 65, No. 3, 03.2020, p. 420-425.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{f21aeff95a424c818d0a846123a09a4f,

title = "Gold(III) Chlorohydroxo Complexes in Aqueous Solutions at Increased Temperatures",

abstract = "The stagewise substitution equilibria AuCl- 4 + iOH– = AuCl4 – i OHi - + iCl–, βi in aqueous solutions at 50 and 80°C (I = 1 mol/L NaCl) have been studied. The equilibrium constants log β1 = 7.26, log β2 = 13.98, log β3 = 19.66, log β4 = 24.78 (50°C); log β1 = 6.89, log β2 = 13.13, log β3 = 18.43, and log β4 = 23.30 (80°C) have been determined. They are lower than the same constants at 25°C. The spectra of complex speciesspecies at 80°C have been calculated, and the heterogeneous equilibrium 0.5Au2O3 xH2OS + OH– = Au(OH)4 - + 0.5xH2O of the red Au2O3 · xH2OS species at 80°C has been studied, logKS = 3.7 ± 0.2. The obtained results may be useful in geochemistry and the synthesis of gold nanoparticles.",

keywords = "equilibria in solution, gold(III) complexes, increased temperatures, stability constants, substitution of ligands, GOLD NANOPARTICLES, REDUCTION, MECHANISM, SPECIATION, CITRATE, SIZE, PH",

author = "Mironov, {I. V.} and Kharlamova, {V. Yu}",

year = "2020",

month = mar,

doi = "10.1134/S0036023620030092",

language = "English",

volume = "65",

pages = "420--425",

journal = "Russian Journal of Inorganic Chemistry",

issn = "0036-0236",

publisher = "Maik Nauka-Interperiodica Publishing",

number = "3",

}

RIS

TY - JOUR

T1 - Gold(III) Chlorohydroxo Complexes in Aqueous Solutions at Increased Temperatures

AU - Mironov, I. V.

AU - Kharlamova, V. Yu

PY - 2020/3

Y1 - 2020/3

N2 - The stagewise substitution equilibria AuCl- 4 + iOH– = AuCl4 – i OHi - + iCl–, βi in aqueous solutions at 50 and 80°C (I = 1 mol/L NaCl) have been studied. The equilibrium constants log β1 = 7.26, log β2 = 13.98, log β3 = 19.66, log β4 = 24.78 (50°C); log β1 = 6.89, log β2 = 13.13, log β3 = 18.43, and log β4 = 23.30 (80°C) have been determined. They are lower than the same constants at 25°C. The spectra of complex speciesspecies at 80°C have been calculated, and the heterogeneous equilibrium 0.5Au2O3 xH2OS + OH– = Au(OH)4 - + 0.5xH2O of the red Au2O3 · xH2OS species at 80°C has been studied, logKS = 3.7 ± 0.2. The obtained results may be useful in geochemistry and the synthesis of gold nanoparticles.

AB - The stagewise substitution equilibria AuCl- 4 + iOH– = AuCl4 – i OHi - + iCl–, βi in aqueous solutions at 50 and 80°C (I = 1 mol/L NaCl) have been studied. The equilibrium constants log β1 = 7.26, log β2 = 13.98, log β3 = 19.66, log β4 = 24.78 (50°C); log β1 = 6.89, log β2 = 13.13, log β3 = 18.43, and log β4 = 23.30 (80°C) have been determined. They are lower than the same constants at 25°C. The spectra of complex speciesspecies at 80°C have been calculated, and the heterogeneous equilibrium 0.5Au2O3 xH2OS + OH– = Au(OH)4 - + 0.5xH2O of the red Au2O3 · xH2OS species at 80°C has been studied, logKS = 3.7 ± 0.2. The obtained results may be useful in geochemistry and the synthesis of gold nanoparticles.

KW - equilibria in solution

KW - gold(III) complexes

KW - increased temperatures

KW - stability constants

KW - substitution of ligands

KW - GOLD NANOPARTICLES

KW - REDUCTION

KW - MECHANISM

KW - SPECIATION

KW - CITRATE

KW - SIZE

KW - PH

UR - http://www.scopus.com/inward/record.url?scp=85083193735&partnerID=8YFLogxK

U2 - 10.1134/S0036023620030092

DO - 10.1134/S0036023620030092

M3 - Article

AN - SCOPUS:85083193735

VL - 65

SP - 420

EP - 425

JO - Russian Journal of Inorganic Chemistry

JF - Russian Journal of Inorganic Chemistry

SN - 0036-0236

IS - 3

ER -

ID: 24076362