Cobalt coordination polymer with reversible monocrystal-monocrystal transformation behavior

Abstract

The invention discloses a cobalt coordination polymer with reversible monocrystal-monocrystal transformation behavior. The chemical formula of the cobalt coordination polymer is [Co1.5(tipb)(SO4)(acid)0.5](solvent), wherein tipb is ligand 1,3,5-tri(p-imidazole phenyl) benzene, acid is diacid, solvent refers to a solvent, and the preparation method comprises the following steps: adding the ligand, diacids and cobaltous sulfate in the anhydrous solvent, adding pyridine to adjust the pH value to alkalescence, obtaining bulk blue monocrystal through the solvothermal reaction, naturally cooling, washing and drying, wherein the blue monocrystal can be transformed into the cobalt coordination polymer red monocrystal under the action of water or ammonia. The cobalt coordination polymer disclosed by the invention has the advantages that the micropore cobalt coordination polymer material can be used for realizing the reversible transformation from one crystal to another crystal with the change of crystal color, aperture, dielectric and topological structure; and the material has potential application value in the material field such as sensing and absorption separation.

Description

technical field [0001] The metal-organic coordination polymer material involved in the invention is particularly a cobalt coordination polymer with reversible single crystal-single crystal conversion behavior. Background technique [0002] Reversible structural transformations that can respond to external stimuli have attracted widespread interest. Such materials have great application value in sensing, molecular capture, molecular devices and other related fields. In particular, materials with reversible single-crystal-to-single-crystal transformation behavior have attracted great attention, because people can easily study and design such materials from the molecular or even atomic level, see: 1) K.Takaoka, M. Kawano, M. Tominaga, M. Fujita, Angew. Chem. Int. Ed. 2005, 44, 2151-2154; 2) S. Kitagawa, K. Uemura, Chem. Soc. Rev. 2005, 34, 109-119; 3) K.Hanson, N.Calin, D.Bugaris, M.Scancella, S.C.Sevov, J.Am.Chem.Soc.2004, 126, 10502-10503; 4) E.Y.Lee, S.Y.Jang, M.P.Suh, J.A...

AI Technical Summary

Problems solved by technology

However, it is very challenging to design and construct such single-crystal conversion materials with special structures and properties, especially those with specific conversion conditions.

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