Evidence of distorted fivefold coordination of the Cu2+ aqua ion from an x-ray-absorption spectroscopy quantitative analysis -: art. no. 174205

被引：124

作者：

Benfatto, M

D'Angelo, P

Della Longa, S

Pavel, NV

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[2] Univ Roma La Sapienza, Dipartimento Chim, I-00185 Rome, Italy

[3] INFM, UdR Camerino, Camerino, Italy

[4] Univ Aquila, Dipartimento Med Sperimentale, I-67100 Laquila, Italy

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.65.174205

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A combined x-ray-absorption near-edge structure and extended x-ray-absorption fine-structure quantitative analysis, based on fitting procedures of both low- and high-energy ranges, has been carried out at the Cu K edge. This allowed an accurate determination of the structural parameters associated with the first hydration shell of the Cu2+ aqua complex. The existence of an average fivefold coordination has been evidenced, ruling out the recently proposed regular pyramidal configuration with five equal Cu-O distances. Our structural results are compared with recent neutron-diffraction data performed by the second-difference isotopic substitution method.

引用

页码：1742051 / 1742055

页数：5

共 45 条

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