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Controlling the emission in flexibly-linked (N^C^N)platinum dyads.
Eleonora Garoni1, Julien Boixel, Vincent Dorcet
1Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France. Veronique.Guerchais@univ-rennes1.fr.
Dalton Transactions (Cambridge, England : 2003)
|December 5, 2017
Summary
Dinuclear platinum(II) complexes with flexible polyether linkers exhibit tunable emission properties. The linker
Area of Science:
- Coordination Chemistry
- Photophysics
- Materials Science
Background:
- Dinuclear platinum(II) complexes are investigated for their unique photophysical properties.
- The role of linker groups in mediating interactions between metal centers is crucial.
- Understanding self-association and excimer formation is key to controlling emission.
Purpose of the Study:
- To synthesize and characterize dinuclear platinum(II) complexes with polyether linkers.
- To investigate the influence of linker structure on photophysical properties and self-association.
- To explore the potential for tunable emission based on environmental factors.
Main Methods:
- Synthesis and spectroscopic characterization of dinuclear platinum(II) complexes (Pt-2, Pt-3).
- Photophysical property measurements (luminescence, solvatochromism).
- Density Functional Theory (DFT) and Time-Dependent DFT (TD-DFT) calculations.
Main Results:
- Dinuclear complex Pt-2 exhibits tunable emission (green to deep-red) influenced by temperature, solvent, and cation coordination.
- Solvent polarity controls the extended vs. folded arrangement, inducing solvatochromic shifts.
- Complex Pt-3 readily forms a red-shifted emissive excimer with stronger inter-complex interaction than Pt-2.
Conclusions:
- Flexible polyether linkers enable self-association and tunable photophysical behavior in dinuclear Pt(II) complexes.
- The linker's role is critical in modulating emission properties and inter-metal interactions.
- These complexes offer potential for developing stimuli-responsive luminescent materials.
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