Synthesis, crystal structure, and luminescent properties of new zinc(II) and cadmium(II) metal-organic frameworks based on flexible bis(imidazol-1-yl)alkane ligands

Marina Barsukova, Tatiana Goncharova, Denis Samsonenko, Danil Dybtsev, Andrei Potapov*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    21 Scopus citations

    Abstract

    New metal-organic frameworks (MOFs) based on zinc and cadmium ions, terephthalic acid, and flexible ligands 1,5-bis(imidazol-1-yl)pentane or 1,6-bis(imidazol-1-yl)hexane were prepared and characterized by X-ray diffraction, thermorgavimetric analysis and IR spectroscopy. The imidazolyl ligands were prepared by a new robust procedure involving the reaction between imidazole and 1,5-dibromopentane or 1,6-dibromohexane in a superbasic medium (KOH in DMSO). MOFs based on 1,5-bis(imidazol-1-yl)pentane had diamond topology (dia) and are triply interpenetrated. Ligands with longer spacer 1,6-bis(imidazol-1-yl)hexane, terephthalate ions and zinc(II) ions formed five-fold interpenetrated metal-organic framework also with dia topology, while cadmium(II) ions with the same ligands formed eight-connected uninodal net with a very rare self-penetrated topological type ilc and a point symbol 424 .5.63. The influence of the chemical composition of MOFs on their photoluminescent properties is investigated and discussed in detail.

    Original languageEnglish (US)
    Article number132
    JournalCrystals
    Volume6
    Issue number10
    DOIs
    StatePublished - 2016

    Bibliographical note

    Funding Information:
    The reported study was supported by the Russian Science Foundation, Grant No. 15-13-10023. The authors are grateful to M.I. Rakhmanova for luminescence measurements and V.D. Orogodnikov for recording NMR spectra.

    Publisher Copyright:
    © 2016 by the authors; licensee MDPI, Basel, Switzerland.

    Keywords

    • Bis(imidazol-1-yl)alkanes
    • Cadmium
    • Flexible ligands
    • Imidazole
    • Luminescence
    • Metal-organic frameworks
    • Zinc

    ASJC Scopus subject areas

    • General Chemical Engineering
    • General Materials Science
    • Condensed Matter Physics
    • Inorganic Chemistry

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