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A Dendrimer-Based Electron Antenna: Paired Electron-Transfer Reactions in Dendrimers with a 4,4‘-Bipyridine Core and Naphthalene Peripheral Groups
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Abstract
Paired electron transfers (ET) induced by the absorption of two photons by synthetic dendrimers are observed in first-, second-, and third-generation dendrimers comprised of a viologen-like core and an array of naphthalene peripheral groups. Flash photolysis and transient absorption techniques show that the yield of photoinduced double ET depends on laser intensity in the two largest dendrimers, NBV2+2 and NBV3+2. Their photochemical behavior thus requires an unusual multiphoton kinetic scheme. These dendrimers constitute the first synthetic models capable of multiple electron redox events deriving from a defined molecular architecture, thus mimicking natural light-collecting antenna systems.
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This article has been cited by 21 ACS Journal articles (5 most recent appear below).
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Photo- and Electrochemical Redox Behavior of Cyclometalated Ru(II) Complexes Having a 3-Phenylbenzo[b][1,6]naphthyridine Ligand
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Sumanta Kumar Padhi and Koji TanakaInorganic Chemistry2011 50 (21), 10718-10723Cyclometalated Ru(II) complexes having a 3-phenylbenzo[b][1,6]naphthyridine (phbn) ligand have been synthesized and characterized by spectroscopic methods. The photo- and electrochemical redox behavior of the complexes are demonstrated. Complex [Ru(phbn)(...
Preparation, Characterization, and Electrochemical Properties of a New Series of Hybrid Dendrimers Containing a Viologen Core and Fréchet and Newkome Dendrons
Papri Bhattacharya and Angel E. KaiferThe Journal of Organic Chemistry2008 73 (15), 5693-5698Preparation, Characterization, and Electrochemical Properties of a New Series of Hybrid Dendrimers Containing a Viologen Core and Fréchet and Newkome Dendrons
Papri Bhattacharya and Angel E. KaiferThe Journal of Organic Chemistry2008 73 (15), 5693-5698Five new 4,4′-bipyridinium (viologen) core dendrimers containing a Fréchet (Fn, n = 1−3, first to third generation) and a Newkome (Nn, n = 1−3) dendron linked to each of the termini of the viologen residue were prepared and characterized. These ...
Structural Induced Control of Energy Transfer within Zn(II)−Porphyrin Dendrimers
Jane Larsen, Ben Brüggemann, Tony Khoury, Joseph Sly, Maxwell J. Crossley, Villy Sundström, and Eva ÅkessonThe Journal of Physical Chemistry A2007 111 (42), 10589-10597Structural Induced Control of Energy Transfer within Zn(II)−Porphyrin Dendrimers
Jane Larsen, Ben Brüggemann, Tony Khoury, Joseph Sly, Maxwell J. Crossley, Villy Sundström, and Eva ÅkessonThe Journal of Physical Chemistry A2007 111 (42), 10589-10597We report on a study of singlet−singlet annihilation kinetics in a series of Zn(II)−porphyrin-appended dendrimers, where the energy transfer efficiency is significantly improved by extending the molecular chain that connects the light-harvesting ...
Photocurrent Generation in Layer-By-Layer Assembled Dendrimers with Ruthenium Tris-bipyridine Peripheral Groups and a Viologen-like Core
Manal Abi Saab, Rouba Abdel-Malak, James F. Wishart, and Tarek H. GhaddarLangmuir2007 23 (21), 10807-10815Photocurrent Generation in Layer-By-Layer Assembled Dendrimers with Ruthenium Tris-bipyridine Peripheral Groups and a Viologen-like Core
Manal Abi Saab, Rouba Abdel-Malak, James F. Wishart, and Tarek H. GhaddarLangmuir2007 23 (21), 10807-10815The photophysical and photoelectrochemical properties of first- and second-generation dendrimers with ruthenium tris-bipyridine peripheral groups and a tri-viologen like core (Ru3V3 and Ru6V3) were investigated in solution and when embedded within ...
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- Published In Issue July 17, 2002
- Received January 22, 2002
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