A behavioural difference between an iron(II) grafted polyphosphazene and its small molecule cyclophosphazene analogue

• An Fe(II)-cyclotriphosphazene and its polyphosphazene analogue are synthesised.
• The Fe(II)-cyclotriphosphazene is high spin at all measurable temperatures.
• Its polyphosphazene analogue remains low spin.

Mössbauer and electronic absorbance spectroscopy along with variable temperature magnetic moment measurements demonstrate that a cyclotriphosphazene substituted with an iron(II)-bis-2,6-di(1H-pyrazoly-yl)pyridine moiety (1) and its polyphosphazene analogue (2) differ significantly in magnetic behaviour.

A cyclotriphosphazene substituted with an iron(II)-bis-2,6-di(1H-pyrazoly-yl)pyridine moiety and its polyphosphazene analogue differ significantly in magnetic behaviour.Figure optionsDownload as PowerPoint slide