A microporous alkaline-earth phosphonate sustained by one-dimensional inorganic and organic units

Authors: Vaidhyanathan, Ramanathan; Mahmoudkhani, Amir H.; Shimizu, George K.

Source: Canadian Journal of Chemistry, Volume 87, Number 1, January 2009 , pp. 247-253(7)

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Abstract:

The single-crystal X-ray structure of a microporous alkaline-earth phosphonate incorporating a new triphosphonate ligand is presented. Sr₂(H₂L)(CH₃OH)(H₂O)₄, where L = 1,3,5-tris(4-phosphonophenyl)benzene, crystallizes in triclinic space group P-1 (a = 6.9230(4) Å, b = 15.3370(9) Å, c = 16.1930(11) Å, α = 62.201(3)°, β = 85.288(4)°, γ = 86.665(4)°). The solid is sustained by cooperative interactions between both one-dimensional inorganic and organic columns and forms a two-fold interpenetrated microporous structure. Gas and vapour sorption experiments confirm the microporosity. Based upon the sustaining interactions, this compound can serve as a model for more porous structures as extension of its structure disfavours further interpenetration.Key words: metal-organic framework, coordination polymer, phosphonate, microporous, alkaline earth.

Faisant appel à la diffraction des rayons X par un cristal unique, on a déterminé la structure cristalline d'un phosphonate de terre alcaline microporeuse incorporant un nouveau ligand triphosphonate. Le Sr₂(H₂L)(CH₃OH)(H₂O)₄ dans lequel L = 1,3,5-tris(4-phosphonophényl)benzène cristallise dans le groupe d'espèce P-1 [a = 6,9230(4) Å, b = 15,3370(9) Å et c = 16,1930(11) Å, α = 62,201(3)°, β = 85,288(4)° et γ = 86,665(4)°]. Le solide est soutenu par des interactions coopératives entre les colonnes unidimensionnelles inorganiques et organiques et il forme une structure microporeuse binaire dans laquelle on observe une interpénétration. Des expériences de sorption de gaz et de vapeur confirment la microporosité. Sur la base des interactions de soutien, ce composé peut servir de modèle pour des structures plus poreuses puisque l'extension de sa structure défavorise d'autre interpénétration.Mots-clés : squelette organométallique, polymère de coordination, phosphonate, microporeux, terre alcaline.[Traduit par la Rédaction]

Document Type: Research article

Publication date: 2009-01-01

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A microporous alkaline-earth phosphonate sustained by one-dimensional inorganic and organic units

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