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Updated: Sep 9, 2025
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Published on: October 31, 2019
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Modulating supramolecular Pt⋯Pt interactions and π-π stacking for high-contrast mechanochromic and vapochromic
Xianchao Du1, Xiang Liu1,2, Qianyun Liu1
1College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, P. R. China. xianchaodu@163.com.
Chemical Communications (Cambridge, England)
|August 29, 2025
Summary
A new platinum(II) complex (Pt-PF) exhibits distinct yellow and red forms. These forms interconvert, showing mechanochromic and vapochromic properties due to changes in platinum-platinum interactions and stacking.
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Photophysics
Background:
- Platinum(II) complexes are investigated for their unique photophysical and structural properties.
- Bis(imidazolyl)pyridine ligands offer versatile coordination environments for metal complexes.
Purpose of the Study:
- To synthesize and characterize a novel platinum(II) complex with bis(imidazolyl)pyridine ligands.
- To investigate the photophysical properties and solid-state transformations of the synthesized complex.
- To explore the mechanochromic and vapochromic behavior of the platinum(II) complex.
Main Methods:
- Synthesis of the platinum(II) complex (Pt-PF).
- Comprehensive photophysical characterization.
- Analysis of structural arrangements and intermolecular interactions (Pt⋯Pt, π-π stacking).
- Investigation of color changes induced by mechanical grinding and vapor exposure (acetonitrile, methanol).
Main Results:
- Two distinct forms of Pt-PF were identified: Y-Pt-PF (yellow) and R-Pt-PF (red).
- A reversible transformation between Y-Pt-PF and R-Pt-PF was observed upon mechanical grinding or exposure to specific solvent vapors.
- The color change is attributed to modulated supramolecular Pt⋯Pt interactions and π-π stacking patterns.
Conclusions:
- The synthesized platinum(II) complex exhibits high-contrast mechanochromic and vapochromic properties.
- The observed transformations are driven by changes in solid-state structure and intermolecular interactions.
- This material holds potential for applications in sensing and responsive materials.
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