Mossbauer studies on hexanuclear iron-sulfur basket clusters

Wang Youtong

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Mossbauer studies on hexanuclear iron-sulfur basket clusters

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- Mossbauer studies on hexanuclear iron-sulfur basket clusters
- NUCLEAR TECHNIQUES Issue 7, (1992)
- 作者机构：
  
  中国科学院福建物质结构究所,福州,350002
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：01 July 1992
- 稿件说明：
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[1]王友桐.六核铁硫笼状原子簇化合物的穆斯堡尔谱研究[J].核技术,1992(07):404-407.

Wang Youtong. Mossbauer studies on hexanuclear iron-sulfur basket clusters[J]. Nuclear techniques, 1992, (7): 404-407.
[1]王友桐.六核铁硫笼状原子簇化合物的穆斯堡尔谱研究[J].核技术,1992(07):404-407. DOI：

Wang Youtong. Mossbauer studies on hexanuclear iron-sulfur basket clusters[J]. Nuclear techniques, 1992, (7): 404-407. DOI：

摘要

实验测定了六核铁硫笼状原子簇化合物（α）Fe

（PEt

）

（SR）

和（b）Fe

（μ-Sph）(PB

)

（SPh）

的穆斯堡尔谱。它们都是由两组对称的四极分裂双峰叠加而成.实验数据用最小二乘法计算程序拟合。拟合后的穆斯堡尔参数（在77K时）:对于簇合物（α）

的δ=0.458±0.004mm/s

△E

=0.805±0.004mm/s

A=63.0±3％;Fe

Ⅱ

的δ=0.286±0.004mm/s

△E

=0.849±0.004mm/s

A=37.0±3％;对于簇合物（b）

Ⅰ

的δ=0.529±0.004mm/s

△E

=0.782±0.004mm/s

A=68.2±3％;Fe

Ⅱ

的δ=0.335±0.004mm/s

△E

=0.781±0.004mm/s

A=31.8±3％.它们的δ值是相对于α-Fe的。利用四面体FeS

中铁原子的化学位移δ与价态s的经验公式δ=1.44-0.43s可得出:簇合物（α）的Fe

Ⅰ

平均价态为+2.2价

Ⅱ

的平均价态为+2.6价;簇合物（b）的Fe

Ⅰ

价态为+2价

Ⅱ

的平均价态为+2.5价。

Abstract

Mossbauer spectra of hexanuclear iron-sulfur basket clusters （α）Fe6S6（PEt3）4（SR）2 and （b）Fe6S5（μ-Sph）（PBS3）4（Sph）2 have been measured. The data have been measured. The data have been fitted sucessfully with a least-squares fitting computer program. The Mossbauer parameters measured at 77K are as follows

for clusters （α）

Fe1: 8=0. 458±0. 004mm/s

ΔEQ = 0. 805±0. 004mm/s

A = 63. 0±3%; Fe1 :δ=0. 286±0. 004mm/s

ΔEQ = 0. 849 ±0. 004mm/s

A = 37. 0±3%; and for clusters（b）

Fe1 : δ=0. 529±0. 004mm/s

ΔEQ = 0. 782±0. 004mm/s

A=68. 2±3% ; FeI:δ=0. 335±0. 004mm/s

ΔEQ = 0. 781±0. 004mm/s

A = 31. 8±3%. The isomer shifts δ are relative to α-Fe. Using an empirical formula of the iso-mer shift 8 and the mean oxidation states for Fe atoms in tetrahedron FeS4 δ=1.44-0. 43s

it can be deduced that for clusters（α）

.FeI is in +2. 2 and Fe I in ±2. 6; and for clusters（b）

Fe I is in +2 and Fe I in +2. 5.

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