Polyurethanes containing platinum in the main chain : Synthesis, structure and mechanofluorochromism

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Hydroxy-tethered platinum(II) complexes were synthesized and used as diol monomers for polyurethane synthesis. Polyurethanes with moderate molecular weights were obtained by the conventional polyaddition with a diisocyanate. The polyurethane containing platinum(II) complex substituted with t-Bu groups was well soluble in common organic solvents including CHCl₃ and tetrahydrofuran. Segmented polyurethanes containing platinum(II) complex moieties were also synthesized using polytetrahydrofuran and 1,4-butanediol. They showed good elastic properties. The non-segmented polyurethane exhibited distinguishable photoluminescence changes upon grinding in the solid state, while the segmented polyurethanes did not.

This research was financially supported by JSPS KAKENHI Grant Number JP21K05203, the Kansai University Fund for Supporting Young Scholars, 2021.

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