Volume 24, Issue 4 (1-2017)                   www.ijcm.ir 2017, 24(4): 769-778 | Back to browse issues page

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Abstract:   (3587 Views)

Hybrid inorganic-organic material based on Keggin type polyoxometalaes ([SiW12O40]4-) and praseodymium-dipicolinic acid (pydc; 2,6-pyridindicarboxylic acid) with the formula of [Pr2(pydc)2(H2O)8][H2SiW12O40]•4H2O (1) is obtained under a hydrothermal condition. Compound 1 was characterized by infrared spectrum and elemental analysis and its structure was further determined by single-crystal X-ray diffraction. X-ray analysis illustrates the praseodymium atoms connect to each other through organic linkers to form four nuclear cycles. Two crystallographically independent four nuclear cycles are created by a rotation C2 axis. Through connection of these cycles, another two cycles in different orientation will formed which are bigger by 8 nodes. Finally, silicotungstate molecules accommodate up and down these cycles. This motif will expand regularly in all dimensions to construct a 3D coordination polymer accompanied by Keggin nano-particle guests.

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Type of Study: Research | Subject: Special

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