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Four different emissions from a Pt(Bodipy)(PEt3)2(S-Pyrene) dyad
Peter Irmler1, Franciska S Gogesch, Christopher B Larsen
1Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany. rainer.winter@uni-konstanz.de.
Dalton Transactions (Cambridge, England : 2003)
|December 20, 2018
Summary
This study introduces a novel platinum-containing dyad, BPtSPyr, which exhibits four distinct light emissions. These emissions originate from various states, including near-infrared phosphorescence, offering potential applications in optoelectronics.
Area of Science:
- Photochemistry and Photophysics
- Materials Science
- Coordination Chemistry
Background:
- Boron-dipyrromethene (bodipy) and pyrene derivatives are widely studied fluorophores.
- Platinum complexes are known for their phosphorescent properties, useful in various applications.
- Dyads combining different chromophores can lead to unique photophysical behaviors.
Purpose of the Study:
- To synthesize and characterize a novel platinum-containing dyad, BPtSPyr, integrating bodipy and mercaptopyrene.
- To investigate the photophysical properties and emission characteristics of the BPtSPyr dyad.
- To explore the potential of this dyad for applications in areas requiring specific light emission profiles.
Main Methods:
- Synthesis of the platinum(II) complex featuring bodipy and mercaptopyrene ligands.
- Photoluminescence spectroscopy (fluorescence and phosphorescence) at room temperature and 77 K.
- Quantum yield measurements for phosphorescence.
Main Results:
- The BPtSPyr dyad displayed four distinct emission types.
- Intense near-infrared phosphorescence (up to 15% quantum yield) was observed, attributed to a charge-transfer state.
- Additional fluorescence and phosphorescence emissions from the bodipy ligand (1ππ* and 3ππ* states) were detected at room temperature.
- Phosphorescence from both pyrene and bodipy 3ππ* states was observed in a glassy matrix at 77 K.
Conclusions:
- The Pt(bodipy)-(mercaptopyrene) dyad exhibits complex photophysical behavior with multiple emission pathways.
- The observed near-infrared phosphorescence suggests potential for applications in sensing or imaging.
- Temperature-dependent emission studies reveal distinct excited states contributing to the overall luminescence.
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