Synthesis of a Novel Hydrogel Based on a Coordinate Covalent Polymer Network

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

A new type of polymeric inorganic hydrogel is synthesized from the ligand substitution reaction of K2PdCl4 by a cyanometalate such as K3Fe(CN)6 in aqueous solution. These gels typically contain >95% water, as determined by thermogravimetric analysis. The Pd:Fe ratio is 2:1, independent of the stoichiometry employed, and two chloride ligands are displaced per palladium center. Infrared and electrochemical measurements indicate the presence of bridging cyanide ligands (i.e., Fe-CN-Pd), which lead to the formation of polymeric chains. Interchain cross-links are possible by a number of mechanisms. Dynamic oscillatory rheological measurements were performed during the sol-gel process. The effect of the reactant concentration, Pd:Fe ratio, and concentration of spectator ions on the gelation rate is discussed.

Original languageEnglish (US)
Pages (from-to)2661-2665
Number of pages5
JournalJournal of the American Chemical Society
Volume115
Issue number7
DOIs
StatePublished - Apr 1 1993

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Synthesis of a Novel Hydrogel Based on a Coordinate Covalent Polymer Network'. Together they form a unique fingerprint.

  • Cite this