A Dynamic Crystal‐to‐Amorphous Transformation Microporous ZnII Mixed Neutral‐ligand Metal‐organic Polymer {[Zn(bpp)2(μ‐4,4′‐bipy)(H2O)2](ClO4)2·H2O}n |
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| Authors: | Maryam Ghoreishi Amiri Ali Morsali Dr Matthias Zeller |
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| Institution: | 1. Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O.Box 14155‐4838, Tehran, I. R. Iran;2. Department of Chemistry, Youngstown State University, One University Plaza, Youngstown, Ohio, USA |
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| Abstract: | A new rarely reported ZnII mixed‐polypyridine coordination polymer with both rigid and flexible spacers, {Zn(bpp)2(μ‐4,4′‐bipy)(H2O)2](ClO4)2 · H2O}n ( 1 ), has been synthesized and characterized by elemental analysis, IR‐, 1H NMR‐, 13C NMR spectroscopy and single‐crystal X‐ray diffraction. The thermal stability of compound 1 was studied by thermal gravimetric (TG) and differential thermal analyses (DTA). The single‐crystal X‐ray structure of 1 shows that the complex has been formed from a 1D polymer as a result of bridging by the 4,4′‐bipy ligands. Solution and solid‐state luminescent spectra of the compound 1 indicate intense fluorescent emissions at ca. 353.6 and 468.8 nm, respectively. Removal of the interstitial water guest molecules results in a loss of crystallinity, but exposure to water vapor reestablishes the original structure, thus constituting 1 as a third‐generation porous framework. |
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| Keywords: | Zinc 1 3‐Bis(4‐pyridyl)propane 4 4′ ‐Bipyridine Coordination chemistry X‐ray diffraction |
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