Novel amine templated three-dimensional zinc-organophosphonates with variable pore-openings

Paul, Avijit Kumar and Kanagaraj, Rajendiran and Jana, Ajay Kumar and Maji, Pradip K (2017) Novel amine templated three-dimensional zinc-organophosphonates with variable pore-openings. In: CRYSTENGCOMM, 19 (43). pp. 6425-6435.

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Abstract

Five new amine-templated zinc-organophosphonate compounds have been synthesized hydrothermally in the presence of zinc, 1-hydroxyethane-1,1-diphosphonic acid (H(4)hedp) as the diphosphonate ligand and different aliphatic amines. All the five compounds have three-dimensional open-framework structures, which are formed by the connectivity between zinc ions and diphosphonate ligands, and the biprotonated amines are present inside the open-channels. Five different amines, namely ethylenediamine (EDA), diethylenetriamine (DETA), 1,2-diaminopropane (1,2-DAP), 1,3-diaminopropane (1,3-DAP) and diazobicyclooctane (DABCO), have been used to obtain three different classes of framework structures, and such types of amine-templated frameworks are observed for the first time in the family of organophosphonates. Compound I, C2N2H10]Zn-3(hedp)(2)]center dot H2O, and compound II, C4N3H15]Zn-3(hedp)(2)], have similar framework structures, though these compounds have been synthesized in the presence of EDA and DETA, respectively. Compound III, C3N2H12]Zn-3(hedp)(2)], and compound IV, C3N2H12]Zn-3(hedp)(2)], have the same molecular formula and framework structures; however, their amines are different, i.e. 1,2-DAP and 1,3-DAP, respectively. Compound V, C6N2H14]Zn-3(hedp)(2)], forms a different three-dimensional framework from the above structures in the presence of DABCO. By varying the amine molecules from EDA to 1,2-DAP or DABCO, the ring size can be tuned from 4-, 5-, 6-, and 8-membered to only 6-, and 8-membered. All the compounds have also been characterized by powder XRD, IR spectroscopy, and TGA. The luminescence properties of compounds I-V have also been studied.

Item Type:	Journal Article
Publication:	CRYSTENGCOMM
Additional Information:	Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	24 Nov 2017 10:16
Last Modified:	24 Nov 2017 10:16
URI:	http://eprints.iisc.ac.in/id/eprint/58297

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