Abstract
The development of new materials for solar-to-energy conversion should consider stability, ease of fabrication, and beneficial photophysical properties. In this context, a set of novel π-conjugated building blocks, with phospha- and arsaalkenes possessing a unique dithienyl annulated heterofulvenoid core, have been prepared as air- and moisture-stable sensitizers. These compounds unify electron-donor and -acceptor moieties, making them potential candidates for light-harvesting applications. Optical characterization of these systems was performed by steady-state and time-resolved absorption spectroscopy, supported by time-dependent DFT calculations. Tuning of the optical properties of these systems can be achieved by varying the pnictogen element at the bridgehead position, giving a bathochromic shift of ≈40 nm and coordinating the phosphaalkene towards gold AuI centers. The latter results in a ≈2000-fold extension of the ≈10 ps lifetime of uncoordinated systems well into the ns regime.
Original language | English |
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Pages (from-to) | 5673-5677 |
Number of pages | 5 |
Journal | Chemistry - A European Journal |
Volume | 23 |
Issue number | 24 |
DOIs | |
Publication status | Published - 2017 Apr 27 |
Subject classification (UKÄ)
- Physical Chemistry
- Atom and Molecular Physics and Optics
Free keywords
- arsaalkene
- electrochemistry
- main group elements
- phosphaalkene
- pnictogens
- time-resolved spectroscopy