由氧化亚铁硫杆菌氧化的七水合硫酸亚铁中 D2O 被排除在水合球之外。

The Exclusion of D2O from the Hydration Sphere of FeSO4{middle dot} 7H2O Oxidized by Thiobacillus ferrooxidans.

出版信息

Science. 1983 Dec 23;222(4630):1331-4. doi: 10.1126/science.222.4630.1331.

DOI:10.1126/science.222.4630.1331

Abstract

Infrared spectra demonstrate that neither FeSO(4) . 7H(2)O nor its bacterial or abiotic hydrated oxidation products incorporate deuterium in acid D(2)O solutions. Deuterium exchange occurred as bridging OD when bacterially oxidized iron was precipitated from D(2)O solutions as ferric hydroxysulfates. The exclusion of deuterium depended upon the stabilization of aquated Fe(II) and Fe(III) complexes by sulfate ions in outer-sphere coordination and is consistent with the requirement and postulated role of sulfate in iron oxidation by Thiobacillus ferrooxidans.

摘要

红外光谱表明，无论是 FeSO4·7H2O 还是其细菌或非生物水合氧化产物，都不会在酸性 D2O 溶液中掺入氘。当细菌氧化的铁从 D2O 溶液中沉淀为铁的氢氧化物硫酸盐时，氘通过桥连 OD 发生交换。这种氘的排除取决于硫酸盐离子在外层配位中对水合的 Fe(II)和 Fe(III)配合物的稳定作用，这与硫酸盐在氧化亚铁硫杆菌中铁氧化中的要求和假设作用一致。