title: A Step-by-Step Assembly of a 3D Coordination Polymer in the Solid-State by Desolvation and [2+2] Cycloaddition Reactions.
abstract: Two solid-state structural transformations that occur in a stepwise and a controlled manner are described. A combination of desolvation and cycloaddition reactions has been employed to synthesise a 3D coordination polymer (CP) from 1D CP [Cd(bdc)(4-spy)2 (H2 O)]⋅2 H2 O⋅2 DMF (bdc=1,4-benzenedicarboxylate, 4-spy=4-styrylpyridine) presumably via a 2D layered structure, [Cd2 (bdc)2 (4-spy)4 ]. In the absence of single crystals to follow the course of the photocycloaddition reaction, thermogravimetry, XAFS and NOESY NMR experiments were used to propose the formation of layered and pillared layered structures. Further, the present strategy enables us to synthesise new multidimensional architectures that are otherwise inaccessible by the self-assembly process.
authors.affiliation: Department of Chemistry, National University of Singapore, Singapore 117543, Fax: (+65) 6779-1691.
authors.forename: Raghavender
authors.initials: R
authors.lastname: Medishetty
authors.affiliation: Department of Chemistry, National University of Singapore, Singapore 117543, Fax: (+65) 6779-1691.
authors.forename: Rika
authors.initials: R
authors.lastname: Tandiana
authors.affiliation: Department of Chemistry, National University of Singapore, Singapore 117543, Fax: (+65) 6779-1691.
authors.forename: Jien
authors.initials: J
authors.lastname: Wu
authors.affiliation: Department of Chemistry, National University of Singapore, Singapore 117543, Fax: (+65) 6779-1691.
authors.forename: Zhaozhi
authors.initials: Z
authors.lastname: Bai
authors.affiliation: Institute of Chemical and Engineering Science, Agency for Science & Technology and Research, 1 Pesek Road, Jurong Island, Singapore 627833, Fax: (+65) 6773-6734. du_yonghua@ices.a-star.edu.sg.
authors.forename: Yonghua
authors.initials: Y
authors.lastname: Du
authors.affiliation: Department of Chemistry, National University of Singapore, Singapore 117543, Fax: (+65) 6779-1691. chmjjv@nus.edu.sg.
authors.forename: Jagadese J
authors.initials: JJ
authors.lastname: Vittal
keywords: coordination polymers; cycloaddition; desolvation; mechanochemical synthesis; metal-organic frameworks; solid-state reactions