Oligothiophenes Nano-organized on a Cyclotetrasiloxane Scaffold as a Model of a Silica-Bound Monolayer: Evidence for Intramolecular Excimer Formation
Excimer formation in a new class of terthiophene‐based fluorophores covalently bonded to a cyclotetrasiloxane scaffold has been demonstrated and the photophysical process ruling it has been investigated in detail and modeled theoretically. In contrast to the conventional systems in which long‐living...
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Published in | Chemistry : a European journal Vol. 15; no. 46; pp. 12791 - 12798 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
23.11.2009
WILEY‐VCH Verlag Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | Excimer formation in a new class of terthiophene‐based fluorophores covalently bonded to a cyclotetrasiloxane scaffold has been demonstrated and the photophysical process ruling it has been investigated in detail and modeled theoretically. In contrast to the conventional systems in which long‐living fluorophores such as pyrene are linked in the same molecule, an excimer is formed only when two terthiophene‐based branches nano‐organized on the same cyclotetrasiloxane scaffold are close enough together when excitation takes place. In such a case, excimer formation is extremely efficient, and the new bound excited states are quite stable.
What excitement! Excimer formation in a new class of terthiophene‐based fluorophores covalently bonded to a cyclotetrasiloxane scaffold has been demonstrated and the photophysical process ruling it has been investigated and modeled theoretically. In contrast to the classical systems, an excimer is formed only when two branches of the same cyclotetrasiloxane scaffold are close enough together when the excitation takes place (see scheme). |
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Bibliography: | ark:/67375/WNG-TD1G9NJN-W Fondazione Cariplo European Commission - No. MRTN-CT-2006-035884 ArticleID:CHEM200901307 CNR-INSTM PROMO 2006 MUR istex:FFB6F829957BE490CBE4D20D976BA35674EECE99 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0947-6539 1521-3765 |
DOI: | 10.1002/chem.200901307 |