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A Heterometallo‐Supramolecular Polymer with Cu I and Fe II Ions Introduced Alternately
Author(s) -
Hossain Md. Delwar,
Zhang Jian,
Pandey Rakesh K.,
Sato Takashi,
Higuchi Masayoshi
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402468
Subject(s) - chemistry , terpyridine , electrochromism , redox , supramolecular chemistry , metal ions in aqueous solution , metal , cyclic voltammetry , inorganic chemistry , oxidation state , electrochemistry , polymer , titration , ion , supporting electrolyte , ligand (biochemistry) , crystallography , crystal structure , electrode , organic chemistry , biochemistry , receptor
A new heterometallo‐supramolecular polymer with alternating Cu I and Fe II ions (polyCuFe) was synthesized by simple 0.5:0.5:1 complexation of Cu I and Fe II salts with an unsymmetrical ditopic ligand ( L1 ) bearing phenanthroline and terpyridine moieties as the metal coordination sites. Selective complexation was confirmed by UV/Vis spectroscopic titration experiments, and the alternate alignment of the two metal ions in polyCuFe was supported by ESI‐MS data. Cyclic voltammetry of a polyCuFe film showed two reversible redox waves at 0.29 and 0.78 V vs. Ag/Ag + based on the redox of Cu I /Cu II and Fe II /Fe III , respectively. Each oxidation state was successfully observed by acquisition of XPS spectra. A solid‐state display device was fabricated using the polymer film and a gel electrolyte. The device showed multi‐colour electrochromic behaviour by changing an applied potential, based on the different redox potentials of the two metal ions.