A dendrimer bearing two cyclam units linked by an azobenzene moiety, and luminescent naphthalene units at the periphery performs three different functions (light-harvesting, photoisomerization and coordination of metal ions) which can cooperate or interfere depending on the nature of the metal ion. It is thus an example of light controlled molecular tweezers in which Zn(II) coordination allows 100% efficient photosensitization of azobenzene switching, while Cu(II) shuts down azobenzene isomerization.
Photoswitchable metal coordinating tweezers operated by light-harvesting dendrimers / E. Marchi; M. Baroncini; G. Bergamini; J. Van Heyst; F. Vögtle; P. Ceroni. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - STAMPA. - 134:(2012), pp. 15277-15280. [10.1021/ja307522f]
Photoswitchable metal coordinating tweezers operated by light-harvesting dendrimers
MARCHI, ENRICO;BARONCINI, MASSIMO;BERGAMINI, GIACOMO;CERONI, PAOLA
2012
Abstract
A dendrimer bearing two cyclam units linked by an azobenzene moiety, and luminescent naphthalene units at the periphery performs three different functions (light-harvesting, photoisomerization and coordination of metal ions) which can cooperate or interfere depending on the nature of the metal ion. It is thus an example of light controlled molecular tweezers in which Zn(II) coordination allows 100% efficient photosensitization of azobenzene switching, while Cu(II) shuts down azobenzene isomerization.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
