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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
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
John Wiley & Sons
external identifiers
  • scopus:85017362003
  • 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
2018-01-07 12:02:00
@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},
  keyword      = {arsaalkene,electrochemistry,main group elements,phosphaalkene,pnictogens,time-resolved spectroscopy},
  language     = {eng},
  month        = {04},
  number       = {24},
  pages        = {5673--5677},
  publisher    = {John Wiley & Sons},
  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},
  volume       = {23},
  year         = {2017},
}