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Titolo:
Transformations of low-dimensional zinc phosphates to complex open-framework structures. Part 1: zero-dimensional to one-, two- and three-dimensionalstructures
Autore:
Ayi, AA; Choudhury, A; Natarajan, S; Neeraj, S; Rao, CNR;
Indirizzi:
Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India Jawaharlal Nehru Ctr Adv Sci Res Bangalore Karnataka India 560064 , India Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India Indian Inst Sci Bangalore Karnataka India 560012 560012, Karnataka, India
Titolo Testata:
JOURNAL OF MATERIALS CHEMISTRY
fascicolo: 4, volume: 11, anno: 2001,
pagine: 1181 - 1191
SICI:
0959-9428(2001)11:4<1181:TOLZPT>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL PHOSPHATES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Rao, CNR Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Jakkur PO, Bangalore 560064, Karnataka, India Jawaharlal Nehru Ctr Adv Sci Res Jakkur PO Bangalore Karnataka India 560064
Citazione:
A.A. Ayi et al., "Transformations of low-dimensional zinc phosphates to complex open-framework structures. Part 1: zero-dimensional to one-, two- and three-dimensionalstructures", J MAT CHEM, 11(4), 2001, pp. 1181-1191

Abstract

Zero-dimensional 4-membered zinc phosphate monomers, [C6N2H18][Zn(HPO4)(H2PO4)(2)], I, and [C6N4H21][Zn(HPO4)(2)(H2PO4)], II, transform under simple reaction conditions to one-, two- and three-dimensional structures. MonomerII, on heating with zinc acetate dihydrate (Zn(OAc)(2)) in aqueous solution, gives a layered phosphate [C6N4H21][NH4][Zn-6(PO4)(4)(HPO4)(2)]H2O, III. A novel three-dimensional structure [C6N4H21](4)[Zn-7(PO4)(6)](3), IV, with channels comprising Zn7O6 clusters is obtained on heating II in water under hydrothermal conditions. The monomer I transforms to a one-dimensional ladder, [C3N2H5][Zn(HPO4)], V, on heating with imidazole and to a three-dimensional structure, [C4N2H12][Zn-2(H2O)(PO4)(HPO4)](2), VI, on heating with piperazine under ordinary conditions. I also transforms to a layered zinc phosphate, [C6N2H18][Zn-3(H2O)(4)(HPO4)(4)], VII, on heating in water. In addition to the monomer, II, compounds III-VI have been obtained for the first time. The structures formed by the transformations of the monomers also exhibit unique structural features. Thus, in the ladder structure, V, the imidazole molecule is linked to the Zn center similar to the phosphate unit in a typical ladder structure, while in the layered phosphate, III, one-dimensional tubules are linked via ZnO4 tetrahedra and the three-dimensional structure, IV, possesses Zn7O6 clusters. Isolation of several related solids encompassing a variety of architectures through the transformations of zero-dimensional monomeric phosphates demonstrates not only that the 4-memberedring is a basic structural building unit in these open-framework materials, but also sheds light on the building-up process involved in their formation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 16:07:00