title: An indirect generation of 1D M(II)-2,5-dihydroxybenzoquinone coordination polymers, their structural rearrangements and generation of materials with a high affinity for H2, CO2 and CH4.
abstract: A series of solid-state structural transformations are found to accompany desolvation of relatively simple coordination polymers to yield materials that exhibit unexpected gas sorbing properties. Reaction of 1,2,4,5-tetrahydroxybenzene with M(II) salts (M = Mg, or Zn) in an alcohol/water solution in the presence of air affords cis-M(II)(C6H2O4(-II))(H2O)2·2H2O·xROH, (M = Mg, or Zn), crankshaft-like chains in which the absolute configurations of the chiral metal centres follow the pattern Δ Δ Λ Λ Δ Δ Λ Λ, and are hydrogen bonded together to generate spacious channels. When crystals of the crankshaft chain are air dried the crystals undergo a single crystal-to-powder rearrangement to form linear trans-M(II)(C6H2O4(-II))(H2O)2 chains. Further dehydration yields microporous solids that reversibly sorb H2, CH4 and CO2 with high sorption enthalpies.
authors.affiliation: School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia. bfa@unimelb.edu.au r.robson@unimelb.edu.au.
authors.forename: Brendan F
authors.initials: BF
authors.lastname: Abrahams
authors.affiliation: School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia. bfa@unimelb.edu.au r.robson@unimelb.edu.au.
authors.forename: A David
authors.initials: AD
authors.lastname: Dharma
authors.affiliation: School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia. bfa@unimelb.edu.au r.robson@unimelb.edu.au.
authors.forename: Brendan
authors.initials: B
authors.lastname: Dyett
authors.affiliation: School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia. bfa@unimelb.edu.au r.robson@unimelb.edu.au.
authors.forename: Timothy A
authors.initials: TA
authors.lastname: Hudson
authors.affiliation: Bragg Institute, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2234, Australia.
authors.forename: Helen
authors.initials: H
authors.lastname: Maynard-Casely
authors.affiliation: School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia. bfa@unimelb.edu.au r.robson@unimelb.edu.au.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Kingsbury
authors.affiliation: School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia. bfa@unimelb.edu.au r.robson@unimelb.edu.au.
authors.forename: Laura J
authors.initials: LJ
authors.lastname: McCormick
authors.affiliation: School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia. bfa@unimelb.edu.au r.robson@unimelb.edu.au.
authors.forename: Richard
authors.initials: R
authors.lastname: Robson
authors.affiliation: School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia. bfa@unimelb.edu.au r.robson@unimelb.edu.au.
authors.forename: Ashley L
authors.initials: AL
authors.lastname: Sutton
authors.affiliation: School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia. bfa@unimelb.edu.au r.robson@unimelb.edu.au.
authors.forename: Keith F
authors.initials: KF
authors.lastname: White