%0 Journal Article %T Synthesis and single crystal X-ray diffraction of hybrid inorganic-organic based on Praseodymium-dipicolinic acid and nano-structured silicotungstate %J Iranian Journal of Crystallography and Mineralogy %V 24 %N 4 %U http://ijcm.ir/article-1-71-en.html %R %D 2017 %K inorganic-organic hybrids, polyoxometalates, metal-organic frameworks, X-ray diffraction., %X 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. %> http://ijcm.ir/article-1-71-en.pdf %P 769-778 %& 769 %! %9 Research %L A-10-133-12 %+ %G eng %@ 1726-3689 %[ 2017