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Coordination-based vapochromic behavior of a luminescent Pt(ii) complex with potassium ions
Yasuhiro Shigeta1, Ryota Nanko2, Shogo Amemori1,3,4
1NanoMaterials Research Institute, Kanazawa University Kanazawa 920-1192 Japan y-shigeta@se.kanazawa-u.ac.jp mizuno@se.kanazawa-u.ac.jp.
RSC Advances
|April 28, 2022
Summary
Platinum(II) complexes can act as vapor sensors by changing color and luminescence. This study shows potassium ions can enhance this sensing ability by stabilizing vapor-adsorbed forms, enabling new sensor designs.
Area of Science:
- Coordination Chemistry
- Materials Science
- Chemical Sensing
Background:
- Vapochromic platinum(II) complexes offer potential for vapor sensing applications due to their responsive color and luminescence.
- Designing Pt(ii) complexes with predictable vapochromic behavior is challenging due to the weak interactions typically stabilizing vapor-adsorbed states.
Purpose of the Study:
- To investigate the vapochromic behavior of a platinum(II) complex incorporating potassium ions.
- To explore how potassium ions can enhance vapor stabilization and influence the complex's responsiveness.
Main Methods:
- Synthesis and characterization of a Pt(ii) complex with potassium ions.
- Exposure of the complex to specific organic vapors (N,N-dimethylacetamide and N,N-dimethylformamide).
- Analysis of crystal structure transformations and luminescence spectral changes upon vapor exposure.
Main Results:
- The Pt(ii) complex demonstrated crystal structural transformation and altered luminescence spectra upon exposure to N,N-dimethylacetamide and N,N-dimethylformamide vapors.
- Crystal structure analysis confirmed coordination of vapor molecules to potassium ions, indicating strong stabilization of the vapor-adsorbed form.
- The presence of potassium ions was key to stabilizing the vapor-adsorbed state, overcoming typical limitations.
Conclusions:
- Potassium ions can serve as effective vapor coordination sites, significantly enhancing the vapochromic responsiveness of Pt(ii) complexes.
- This strategy provides a novel approach to designing robust and sensitive Pt(ii)-based vapor sensors.
- The findings open new avenues for developing advanced chemical sensing materials utilizing ion-templated vapor interactions.
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