Article (Scientific journals)
A Conjugated Thiophene-Based Rotaxane: Synthesis, Spectroscopy, and Modeling
Zalewski, L.; Wykes, Michael; Brovelli, S. et al.
2010In Chemistry, 16 (13), p. 3933-3941
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Abstract :
[en] A dithiophene rotaxane 1 subsetbeta-CD and its shape-persistent corresponding dumbbell 1 were synthesized and fully characterized. 2D NOESY experiments, supported by molecular dynamics calculations, revealed a very mobile macrocycle (beta-CD). Steady-state and time-resolved photoluminescence experiments in solution were employed to elucidate the excited-state dynamics for both systems and to explore the effect of cyclodextrin encapsulation. The photoluminescence (PL) spectrum of 1 subsetbeta-CD was found to be blueshifted with respect to the dumbbell 1 (2.81 and 2.78 eV, respectively). Additionally, in contrast to previous observations, neither PL spectra nor the decay kinetics of both threaded and unthreaded systems showed changes upon increasing the concentration or changing the polarity of the solutions, thereby providing evidence for a lack of tendency toward aggregation of the unthreaded backbone.
Disciplines :
Physics
Author, co-author :
Zalewski, L.
Wykes, Michael
Brovelli, S.
Bonini, M.
Breiner, T.
Kastler, M.
Dötz, F.
Beljonne, David ;  Université de Mons > Faculté des Sciences > Service de Chimie des matériaux nouveaux
Anderson, H.L.
Cacialli, F.
Samori, P.
Language :
English
Title :
A Conjugated Thiophene-Based Rotaxane: Synthesis, Spectroscopy, and Modeling
Publication date :
06 April 2010
Journal title :
Chemistry
ISSN :
0947-6539
Publisher :
John Wiley & Sons, United Kingdom
Volume :
16
Issue :
13
Pages :
3933-3941
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S817 - Chimie des matériaux nouveaux
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Commentary :
Publié en ligne le 26 mars 2010 Lecture en ligne: http://onlinelibrary.wiley.com/doi/10.1002/chem.200903353/pdf
Available on ORBi UMONS :
since 10 June 2010

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