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      https://www.ias.ac.in/article/fulltext/jcsc/126/05/1451-1461

    • Keywords

       

      Zn(II)bisporphyrin; coordination polymer; binding constant; surface morphology; structure elucidation

    • Abstract

       

      Highly flexible Zn(II)1,2-bis(meso-octaethylporphyrin)ethane (1) has been used as host in which two porphyrin rings are found to be face-to-face in non-coordinating solvents. Upon addition of one relatively smaller 4,4′-dipyridine (L1) and one extended N,N′-bispyridine-4-yl-methylene ethylenediamine (L2) guest ligands, the syn conformation of 1 is switched to the anti complexes 1·(L1)2 and 1·L2, respectively. Single crystal X-ray structures of all the complexes are reported in which a stable one-dimensional coordination polymer is produced only in 1·L2 that is, to the best of our knowledge, the first structural report of 1D-coordination polymer with porphyrin dimer. Solution structures of the complexes along with binding studies in solution between 1 and L have also been investigated. The morphology of the polymeric complex 1·L2 on silicon wafer surface was examined by Atomic Force Microscopy (AFM) in which the crystalline islands of well defined facets of size ranging from 200-550 nm perimeter and a height of 20-40 nm have been observed.

    • Author Affiliations

       

      Sk Asif Ikbal1 Sanfaori Brahma1 Avinash Dhamija1 Sankar Prasad Rath1

      1. Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
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