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Synthesis and Characterization of Cyclopentadithiophene Heterofulvenes : Design Tools for Light-Activated Processes

El Nahhas, Amal LU ; Shameem, Muhammad Anwar ; Chabera, Pavel LU ; Uhlig, Jens LU and Orthaber, Andreas (2017) In Chemistry - A European Journal 23(24). p.5673-5677
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... (More)

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.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
arsaalkene, electrochemistry, main group elements, phosphaalkene, pnictogens, time-resolved spectroscopy
in
Chemistry - A European Journal
volume
23
issue
24
pages
5 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:85017362003
  • pmid:28248442
  • wos:000400044400006
ISSN
0947-6539
DOI
10.1002/chem.201700917
language
English
LU publication?
yes
id
4f457f30-924c-4b5f-a80e-b3e683551c17
date added to LUP
2017-05-05 12:37:05
date last changed
2025-01-07 12:34:53
@article{4f457f30-924c-4b5f-a80e-b3e683551c17,
  abstract     = {{<p>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 Au<sup>I</sup> centers. The latter results in a ≈2000-fold extension of the ≈10 ps lifetime of uncoordinated systems well into the ns regime.</p>}},
  author       = {{El Nahhas, Amal and Shameem, Muhammad Anwar and Chabera, Pavel and Uhlig, Jens and Orthaber, Andreas}},
  issn         = {{0947-6539}},
  keywords     = {{arsaalkene; electrochemistry; main group elements; phosphaalkene; pnictogens; time-resolved spectroscopy}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{24}},
  pages        = {{5673--5677}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Chemistry - A European Journal}},
  title        = {{Synthesis and Characterization of Cyclopentadithiophene Heterofulvenes : Design Tools for Light-Activated Processes}},
  url          = {{http://dx.doi.org/10.1002/chem.201700917}},
  doi          = {{10.1002/chem.201700917}},
  volume       = {{23}},
  year         = {{2017}},
}