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pubmed-article:11196925rdf:typepubmed:Citationlld:pubmed
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pubmed-article:11196925pubmed:issue19lld:pubmed
pubmed-article:11196925pubmed:dateCreated2001-1-24lld:pubmed
pubmed-article:11196925pubmed:abstractTextFive new open-framework zinc phosphates, encompassing the entire hierarchy of open-framework structures, have been synthesized hydrothermally in the presence of triethylenetetramine. The structures include one-dimensional ladders, two-dimensional layers, and three-dimensional structures as well as a zinc phosphate where the amine acts as a ligand. [C6N4H22]0.5[Zn(HPO4)2] (I): monoclinic, space group P2(1)/c (no. 14), a = 5.2677(1) A, b = 13.3025(1) A, c = 14.7833(1) A, beta = 96.049 degrees, Z = 4. [C6N4H22]0.5[Zn2(HPO4)3] (II): triclinic, space group P1 (no. 2), a = 7.515(1) A, b = 8.2553(1) A, c = 12.911(1) A, alpha = 98.654(1) degrees, beta = 101.274(1) degrees, gamma = 115.791(1) degrees, Z = 2. [C6N4H22]0.5[Zn2P2O8] (III): triclinic, space group P1 (no. 2), a = 8.064(1) A, b = 8.457(1) A, c = 9.023(1) A, alpha = 111.9(1) degrees, beta = 108.0(1) degrees, gamma = 103.6(1) degrees, Z = 2. [C6N4H22]0.5[Zn3(PO4)2(HPO4)] (IV): triclinic, space group P1 (no. 2), a = 5.218(1) A, b = 8.780(1) A, c = 16.081(1) A, alpha = 89.3(1) degrees, beta = 83.5(1) degrees, gamma = 74.3(1) degrees, Z = 2. [C6N4H20]0.5[Zn4P4O16] (V): monoclinic, space group P2(1)/c (no. 14), a = 9.219(1) A, b = 15.239(1) A, c = 10.227(1) A, beta = 105.2(1), Z = 4. The structure of I is composed of ZnO4 and HPO4 tetrahedra, which are edge-shared to form four-membered rings, which, in turn, form a one-dimensional chain (ladder). In II, these ladders are fused into a layer. The structures of III and IV comprise networks of ZnO4 and PO4 tetrahedra forming three-dimensional architectures. In V, the amine molecule coordinates to the Zn and acts as a pillar supporting the zinc phosphate layers, which possess infinite Zn-O-Zn linkages. The 16-membered one-dimensional channel in IV and the ZnO3N pillar, along with infinite Zn-O-Zn linkages in V, are novel features. The structure of the open-framework zinc phosphates is found to depend sensitively on the relative concentrations of the amine and phosphoric acid, with high concentrations of the latter favoring structures with lower dimensions.lld:pubmed
pubmed-article:11196925pubmed:languageenglld:pubmed
pubmed-article:11196925pubmed:journalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:11196925pubmed:statusPubMed-not-MEDLINElld:pubmed
pubmed-article:11196925pubmed:monthSeplld:pubmed
pubmed-article:11196925pubmed:issn0020-1669lld:pubmed
pubmed-article:11196925pubmed:authorpubmed-author:NatarajanSSlld:pubmed
pubmed-article:11196925pubmed:authorpubmed-author:RaoC NCNlld:pubmed
pubmed-article:11196925pubmed:authorpubmed-author:ChoudhuryAAlld:pubmed
pubmed-article:11196925pubmed:issnTypePrintlld:pubmed
pubmed-article:11196925pubmed:day18lld:pubmed
pubmed-article:11196925pubmed:volume39lld:pubmed
pubmed-article:11196925pubmed:ownerNLMlld:pubmed
pubmed-article:11196925pubmed:authorsCompleteYlld:pubmed
pubmed-article:11196925pubmed:pagination4295-304lld:pubmed
pubmed-article:11196925pubmed:dateRevised2003-10-31lld:pubmed
pubmed-article:11196925pubmed:year2000lld:pubmed
pubmed-article:11196925pubmed:articleTitleFormation of one-, two-, and three-dimensional open-framework zinc phosphates in the presence of a tetramine.lld:pubmed
pubmed-article:11196925pubmed:affiliationChemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560 064, India.lld:pubmed
pubmed-article:11196925pubmed:publicationTypeJournal Articlelld:pubmed
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