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铈（Ⅴ）与2-羟基吡啶的糖精配合物：[Ce(sac)₂(SO₄)(H₂O)₄]和[Ce(sac)₂(SO₄)(PyOH)₂]的合成、光谱及热性质

Saccharinato complexes of Ce(V) with 2-hydroxypyridine: synthesis, spectroscopic and thermal characteristics of [Ce(sac)2(SO4)(H2O)4] and [Ce(sac)2(SO4)(PyOH)2].

作者信息

Gaballa Akmal S, Teleb Said M, Müller Thomas

机构信息

Department of Chemistry, Faculty of Specific Education, Zagazig University, Zagazig 44519, Egypt.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2008 Oct;70(5):1187-92. doi: 10.1016/j.saa.2007.10.048. Epub 2007 Nov 9.

DOI:10.1016/j.saa.2007.10.048
PMID:18077205
Abstract

The synthesis of Ce(IV) complexes [Ce(sac)2(SO4)(H2O)4] (1) and [Ce(sac)2 (SO4)(PyOH)2] (2) (sac=saccharinate, PyOH=2-hydroxypyridine) starting with sodium saccharinate is described. Their vibrational and nuclear magnetic resonance (1H, 13C) spectra as well as their thermal mode of degradation were investigated. The data indicate that sac in complex 1 behaves as a monodentate ligand through the nitrogen atoms. Saccharinato ligand in complex 2 shows different mode of coordination, where it behaves as tridentate and binds Ce(IV) through its carbonylic oxygen, nitrogen and sulphonylic oxygen atoms. The most probable structure in complex 2 is that, units of [Ce(sac)2(SO4)(PyOH)2] are linked by bridges of the O- of sac sulphonyl leading to polymeric chains.

摘要

描述了以糖精钠为起始原料合成铈（IV）配合物[Ce(sac)₂(SO₄)(H₂O)₄]（1）和[Ce(sac)₂(SO₄)(PyOH)₂]（2）（sac = 糖精，PyOH = 2 - 羟基吡啶）的过程。研究了它们的振动光谱和核磁共振（¹H，¹³C）光谱以及热降解模式。数据表明，配合物1中的糖精通过氮原子作为单齿配体。配合物2中的糖精配体表现出不同的配位模式，它作为三齿配体通过其羰基氧、氮和磺酰氧原子与Ce(IV)结合。配合物2中最可能的结构是，[Ce(sac)₂(SO₄)(PyOH)₂]单元通过糖精磺酰基的O⁻桥连接形成聚合物链。

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