UNIGE document Scientific Article
previous document  unige:126803  next document
add to browser collection
Title

Tuning symmetry breaking charge separation in perylene bichromophores by conformational control

Authors
Tajkhorshid, Emad
Published in Chemical Science. 2019, vol. 10, no. 45, p. 10629-10639
Abstract Understanding structure–property relationships in multichromophoric molecular architectures is a crucial step in establishing new design principles in organic electronics as well as to fully understand how nature exploits solar energy. Here, we study the excited state dynamics of three bichromophores consisting of two perylene chromophores linked to three different crown-ether backbones, using stationary and ultrafast electronic spectroscopy combined with molecular dynamics simulations. The conformational space available to the bichromophores depends on the structure and geometry of the crown-ether and can be significantly changed upon cation binding, strongly affecting the excited-state dynamics. We show that, depending on the conformational restrictions and the local environment, the nature of the excited state varies greatly, going from an excimer to a symmetry-broken charge separated state. These results can be rationalised in terms of a structure–property relationship that includes the effect of the local environment.
Identifiers
Full text
Structures
Research groups Groupe Vauthey
Groupe Lacour
Citation
(ISO format)
ASTER, Alexander et al. Tuning symmetry breaking charge separation in perylene bichromophores by conformational control. In: Chemical Science, 2019, vol. 10, n° 45, p. 10629-10639. doi: 10.1039/C9SC03913A https://archive-ouverte.unige.ch/unige:126803

127 hits

51 downloads

Update

Deposited on : 2019-11-22

Export document
Format :
Citation style :