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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Spectroscopic investigation of a new hybrid glass formed by the interaction between croconate ion and calcium polyphosphate
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Spectroscopic investigation of a new hybrid glass formed by the interaction between croconate ion and calcium polyphosphate

机译：croconate离子与多磷酸钙相互作用形成的新型混合玻璃的光谱研究

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In this work, a new organic-inorganic hybrid material has been synthesized by the incorporation of croconate ion into a calcium polyphosphate coacervate. The hybrid so obtained was characterized by means of electronic and vibrational spectroscopies. The material is a homogeneous mixture described by a structural model, which includes helical chains of polyphosphate ions, where the calcium ion occupies the internal vacancies of the structure. The croconate ion appears to be occupying the regions outside the polymeric structure, surrounded by several water molecules. The electronic spectrum of the incorporated material shows a broad band peaking at the same wavelength region (363 nm) observed for the aqueous solution of croconate ion, and manifesting the Jahn-Teller effect as evidenced by the doublet structure of the band. The infrared spectrum is widely dominated by the absorption bands of the polyphosphate ion and the appearance of the carbonyl stretching band at ca. 1550 cm(-1) indicates the presence of croconate ion incorporated in the structure. The Raman spectrum of the material shows several vibrational bands related to the oxocarbon moiety; most of them are shifted in comparison with the free ion. These shifts can be understood in terms of strong hydrogen bonding interactions between water molecules and the oxocarbon moiety. The low temperature methodology proposed here can be well used in the preparation of new phosphate glasses containing organic moieties opening the route to an entirely new class of hybrid glasses. (c) 2004 Elsevier B.V All rights reserved.
机译：在这项工作中，通过将croconate离子掺入聚磷酸钙凝聚层中，合成了一种新的有机-无机杂化材料。如此获得的杂化物通过电子和振动光谱学表征。该材料是由结构模型描述的均匀混合物，该结构模型包括聚磷酸根离子的螺旋链，其中钙离子占据了结构的内部空位。 crocroate离子似乎占据了聚合物结构外部的区域，被几个水分子包围。所掺入材料的电子光谱显示出在相同的波长范围（363 nm）处观察到的crocroate离子水溶液出现了一个宽带峰，并显示了Jahn-Teller效应，这是由该带的双峰结构所证明的。红外光谱主要由聚磷酸根离子的吸收带和大约在2,000℃的羰基拉伸带的出现所主导。 1550 cm（-1）表示结构中掺入了croconate离子。该材料的拉曼光谱显示出与碳氧化合物部分相关的几个振动带。与自由离子相比，它们大多数都发生了位移。可以根据水分子和碳氧化合物之间强烈的氢键相互作用来理解这些变化。本文提出的低温方法可以很好地用于制备含有有机部分的新型磷酸盐玻璃，从而开辟了通往全新杂种玻璃的途径。 （c）2004 Elsevier B.V保留所有权利。

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