Synthesis of Tin (II) Phosphate Open Frameworks Using Isomers of 1, 2-Diaminocyclohexane as Template

Yuan, X.
Xu, Y.
You, X.
Linhardt, Robert J.
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Biology , Chemistry and chemical biology , Chemical and biological engineering , Biomedical engineering
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Synthesis of Tin (II) Phosphate Open Frameworks Using Isomers of 1, 2-Diaminocyclohexane as Template, X. Yuan, Y. Xu, X. You, R. J. Linhardt, European Journal of Inorganic Chemistry, 858-864, 2007.
A novel layered framework of tin(II) phosphate, [Sn4(PO4)3(OH)]2–·[trans-1,2-C6H10(NH3)2]2+, has been synthesized under hydrothermal conditions with tin(II) oxalate, phosphoric acid and a mixture of trans- and cis-1,2-diaminocyclohexane (1,2-DACH). The compound crystallizes in the monoclinic space group P21/n (No. 14). The channels of the trans-1,2-DACH are occluded by hydrogen bonding in the doubly protonated form, which is leached out from the framework. Reaction using only tran-DACH gives the same compound. For comparison, when cis-DACH is used as template under the same conditions instead of the mixture of trans and cis isomers, the neutral inorganic phosphate framework (Sn3O)2(Sn2O)2(PO4)4 is formed. It crystallizes in the triclinic space group Pequation image (No. 2). These results suggest that trans-1,2-DACH is selectively occluded in the framework [Sn4(PO4)3(OH)]2–·[trans-1,2-C6H10(NH3)2]2+.
European Journal of Inorganic Chemistry, 858-864
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