Copper(II) coordination polymers of imdc− (H2imdc+ = the 1,3-bis(carboxymethyl)imidazolium cation): unusual sheet interpenetration and an unexpected single crystal-to-single crystal transformation

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dc.contributor.authorAbrahams, BFen_AU
dc.contributor.authorMaynard-Casely, HEen_AU
dc.contributor.authorRobson, Ren_AU
dc.contributor.authorWhite, KFen_AU
dc.date.accessioned2015-09-28T04:50:01Zen_AU
dc.date.available2015-09-28T04:50:01Zen_AU
dc.date.issued2013-10-08en_AU
dc.date.statistics2015-09-10en_AU
dc.description.abstractThe monoanion of 1,3-bis(carboxymethyl)imidazolium (H2imdc+) combines with Cu(II) to produce an undulating 2D coordination polymer of composition [Cu2(imdc)2(CH3OH)2](BF4)2·(CH3OH)(H2O) (1) in which copper acetate-like dimers, linked by imdc− ligands, act as 4-connecting centres. Cationic sheets stack on top of each other in an A, B, A, B… fashion and produce a structure that contains channels running parallel to the plane of network. Tetrafluoroborate anions are located in channels between sheets. Upon removal of coordinated and noncoordinated solvent molecules a single crystal-to-single crystal transformation occurs to yield a similar compound but with BF4 − anions now coordinated. CO2 isotherms measured at 258 and 273 K show only modest uptake of CO2 but provide an indication that the sheets move apart at elevated pressures in order to accommodate the guest molecules. A compound of composition [Cu3(OH)2(imdc)2]·SiF6·2H2O·2MeOH (3), which possesses a 3D network, is formed by the combination of copper(II) acetate, copper(II) hexafluorosilicate and Himdc. In this structure infinite parallel Cu3(OH)2 chains are linked by bridging imdc− ligands to form channels that have an approximately triangular cross-section. These channels are occupied by SiF6 2− anions in addition to solvent molecules. When copper(II) acetate is combined with Himdc in the appropriate ratio, a 1D coordination polymer of composition Cu(imdc)2 (4) is formed in which pairs of imdc− anions bridge Cu(II) centres. When the reaction is performed in the presence of NaBF4 a minor crystalline product with tetragonal symmetry is isolated in addition to the 1D coordination polymer. This compound of composition Cu2(imdc)4NaBF4·7H2O (5) consists of 2D Cu(imdc)2 networks and features an unusual mode of interpenetration. © 2013, The Royal Society of Chemistry.en_AU
dc.identifier.citationAbrahams, B. F., Maynard-Casely, H. E., Robson, R., & White, K. F. (2013). Copper(ii) coordination polymers of imdc− (H2imdc+ = the 1,3-bis(carboxymethyl)imidazolium cation): unusual sheet interpenetration and an unexpected single crystal-to-single crystal transformation. CrystEngComm, 15(45), 9729-9737. doi:10.1039/C3CE41226Aen_AU
dc.identifier.govdoc6060en_AU
dc.identifier.issn1499-8033en_AU
dc.identifier.issue45en_AU
dc.identifier.journaltitleCrystEngCommen_AU
dc.identifier.pagination9729-9737en_AU
dc.identifier.urihttp://dx.doi.org/10.1039/c3ce41226aen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6217en_AU
dc.identifier.volume15en_AU
dc.language.isoenen_AU
dc.publisherRoyal Society of Chemistryen_AU
dc.subjectPolymersen_AU
dc.subjectCopperen_AU
dc.subjectSolventsen_AU
dc.subjectMoleculesen_AU
dc.subjectCrystal structureen_AU
dc.subjectLigandsen_AU
dc.titleCopper(II) coordination polymers of imdc− (H2imdc+ = the 1,3-bis(carboxymethyl)imidazolium cation): unusual sheet interpenetration and an unexpected single crystal-to-single crystal transformationen_AU
dc.typeJournal Articleen_AU
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