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Updated: Dec 13, 2025

A Salt-Templated Synthesis Method for Porous Platinum-based Macrobeams and Macrotubes
Published on: May 18, 2020
Phase transformation induced mechanochromism in a platinum salt: a tale of two polymorphs
Amie E Norton1, Mahmood Karimi Abdolmaleki1, Jiamin Liang1
1Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, USA. amie.norton@usda.gov.
Abstract:
Red crystals of [Pt(tpy)Cl]NO3·HNO3 show mechanochromic behaviour turning yellow when pressure is applied. The electronic character and spectroscopic signature of the red and yellow polymorphs change as a result of slipping of the molecular stacking planes in the solid state. The slippage alters the PtPt intermolecular distances from a linear stacked motif with <3.5 Å separations in the red polymorph to a less stacked motif of alternating short intradimer and long interdimer interactions in the yellow polymorph.
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