A bis(C60)-bis(phthalocyanine) nanoconjugate: synthesis and photoinduced charge transfer.
A novel dimeric phthalocyanine-C60 nanoconjugate, consisting of a bisphthalocyanine core to which two fullerenes are attached, has been prepared. The synthetic strategy implemented the preparation of a diformyl butadiynyl-bridged bisphthalocynaninato-zinc(II) complex by means of palladium-catalyzed cross-coupling reactions and subsequent dipolar cycloaddition reactions. Photophysical experiments confirm that an intramolecular electron transfer, namely, from the photoexcited ZnPc moiety to the electron-accepting C60 unit, governs the overall photoreactivity of the nanoconjugate. Through-space charge-transfer interactions facilitated by the close proximity of the ZnPc and the C60 moieties play a decisive role in determining the lifetimes of the charge-separated state which range from 10(-10) to 10(-9) seconds.
Kahnt
Axel
A
Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany.
Quintiliani
Maurizio
M
Vázquez
Purificación
P
Guldi
Dirk M
DM
Torres
Tomás
T
D000042:Absorption; D004579:Electron Transport; D037741:Fullerenes / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D008958:Models, Molecular; D008968:Molecular Conformation; D053758:Nanoparticles / Q000737:chemistry*; D010777:Photochemistry; D013050:Spectrometry, Fluorescence
D037741:Fullerenes; D007211:Indoles; D054833:Isoindoles; C069837:fullerene C60; C013647:phthalocyanine