Article (Scientific journals)
Influence of Supramolecular Organization on Energy Transfer Properties in Chiral Oligo(p-phenylene vinylene) Porphyrin Assemblies
Hoeben, F.J.M.; Wolffs, M.; Zhang, J. et al.
2007In Journal of the American Chemical Society, 129 (31), p. 9819-9828
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Abstract :
[en] A comparative study on oligo(p-phenylene vinylene) (OPV)-appended porphyrins containing all trans-vinylene (either hydrophilic or lipophilic) or amide linkages (lipophilic) is presented. The type of supramolecular arrangement obtained in organic solvents proves to be strongly dependent on the nature of the covalent connection. In the case of all trans-vinylene linkages, a J-type intermolecular packing is obtained and the assemblies are only of moderate stability. Conversely, the supramolecular structures obtained from the amide-linked system display an H-type stacking arrangement of enhanced stability and chirality as a consequence of intermolecular hydrogen bonding along the stack direction, favorably interlocking the stacked building blocks. Interestingly, the observed differences in stability and organization are qualitatively illustrated by monitoring the sequential energy transfer process in both types of assemblies. Efficient intramolecular energy transfer from the OPVs (donors) to the respective porphyrin cores is followed by energy transfer from Zn-porphyrin (donor) to free-base porphyrin (acceptor) in both systems. However, the improved intermolecular organization for the amide-linked system increases the energy transfer efficiency along the stack direction. In addition, the water-soluble (OPV)-appended porphyrin system forms highly stable assemblies in an aqueous environment. Nevertheless, the poor energy transfer efficiency along the stack direction reveals a relative lack of organization in these assemblies.
Disciplines :
Chemistry
Physics
Author, co-author :
Hoeben, F.J.M.
Wolffs, M.
Zhang, J.
De Feyter, S.
Leclère, Philippe  ;  Université de Mons > Faculté des Sciences > Chimie des matériaux nouveaux
Schenning, A.P.H.J.
Meijer, E.W.
Language :
English
Title :
Influence of Supramolecular Organization on Energy Transfer Properties in Chiral Oligo(p-phenylene vinylene) Porphyrin Assemblies
Publication date :
08 August 2007
Journal title :
Journal of the American Chemical Society
ISSN :
0002-7863
Publisher :
American Chemical Society, United States - District of Columbia
Volume :
129
Issue :
31
Pages :
9819-9828
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 13 juillet 2007
Available on ORBi UMONS :
since 10 June 2010

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