@article{ghaddar_wishart_thompson_whitesell_fox_2002, title={A dendrimer-based electron antenna: Paired electron-transfer reactions in dendrimers with a 4,4 '-bipyridine core and naphthalene peripheral groups}, volume={124}, ISSN={["1520-5126"]}, DOI={10.1021/ja020103c}, abstractNote={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.}, number={28}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, author={Ghaddar, TH and Wishart, JF and Thompson, DW and Whitesell, JK and Fox, MA}, year={2002}, month={Jul}, pages={8285–8289} } @article{ghaddar_whitesell_fox_2001, title={Excimer formation in a naphthalene-labeled dendrimer}, volume={105}, ISSN={["1089-5647"]}, DOI={10.1021/jp010933x}, abstractNote={Steady-state and time-resolved fluorescence measurements were conducted on newly synthesized Frechet-type dendrimers with naphthalene peripheral groups in homogeneous and sodium dodecyl sulfate (SDS) micellar solutions. Intense excimer emission was observed for the third-generation dendrimer 3 but not for the first-generation dendrimer 1a. This different spectroscopic behavior was attributed to the geometry of dendrimer 3, where excimeric interactions between adjacent π-stacked naphthyl groups are present.}, number={37}, journal={JOURNAL OF PHYSICAL CHEMISTRY B}, author={Ghaddar, TH and Whitesell, JK and Fox, MA}, year={2001}, month={Sep}, pages={8729–8731} } @article{ghaddar_wishart_kirby_whitesell_fox_2001, title={Pulse radiolysis studies of dendritic macromolecules with biphenyl peripheral groups and a ruthenium tris-bipyridine core}, volume={123}, ISSN={["1520-5126"]}, DOI={10.1021/ja011615e}, abstractNote={Electron-transfer reactions in Fréchet-type dendrimers with biphenyl peripheral groups and a ruthenium core were investigated by pulse radiolysis techniques. Fast electron-transfer rates found in the two ruthenium dendrimers suggest a very efficient electronic coupling between the peripheral donor groups and the core acceptor.}, number={51}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, author={Ghaddar, TH and Wishart, JF and Kirby, JP and Whitesell, JK and Fox, MA}, year={2001}, month={Dec}, pages={12832–12836} }