Toward an iron(II) spin-crossover grafted phosphazene polymer

Ross J. Davidson, Eric W. Ainscough, Andrew M. Brodie, Geoffrey B. Jameson, Mark R. Waterland, Harry R. Allcock, Mark D. Hindenlang, Boujemaa Moubaraki, Keith S. Murray, Keith C. Gordon, Raphael Horvath, Guy N L Jameson

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Abstract

Two new cyclotriphosphazene ligands with pendant 2,2′:6′, 2″-terpyridine (Terpy) moieties, namely, (pentaphenoxy){4-[2,6-bis(2- pyridyl)]pyridoxy}cyclotriphosphazene (L 1), (pentaphenoxy){4-[2,6- terpyridin-4-yl]phenoxy}cyclotriphosphazene (L 2), and their respective polymeric analogues, L 1P and L 2P, were synthesized. These ligands were used to form iron(II) complexes with an Fe IITerpy 2 core. Variable-temperature resonance Raman, UV-visible, and Mössbauer spectroscopies with magnetic measurements aided by density functional theory calculations were used to understand the physical characteristics of the complexes. By a comparison of measurements, the polymers were shown to behave in the same way as the cyclotriphosphazene analogues. The results showed that spin crossover (SCO) can be induced to start at high temperatures by extending the spacer length of the ligand to that in L 2 and L 2P; this combination provides a route to forming a malleable SCO material.

Original languageEnglish (US)
Pages (from-to)8307-8316
Number of pages10
JournalInorganic Chemistry
Volume51
Issue number15
DOIs
StatePublished - Aug 6 2012

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All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Davidson, R. J., Ainscough, E. W., Brodie, A. M., Jameson, G. B., Waterland, M. R., Allcock, H. R., Hindenlang, M. D., Moubaraki, B., Murray, K. S., Gordon, K. C., Horvath, R., & Jameson, G. N. L. (2012). Toward an iron(II) spin-crossover grafted phosphazene polymer. Inorganic Chemistry, 51(15), 8307-8316. https://doi.org/10.1021/ic300853f