Coupling a dendrimer and a fullerene chromophore: a study of excited state properties of C61(poly(aryl)acetylene)2

Photochemical and Photophysical Properties of C60 Dendrimers Studied by Laser Flash Photolysis

“…[15][16][17] Although a number of fullerodendrimers have been synthesized, studies on their photophysical properties are limited. 7,11,14 The photochemical bimolecular processes of fullerodendrimers such as photoinduced electron transfer have not been disclosed, to our knowledge. In fullerodendrimers having the fullerene moiety as a core, the steric effect of the surrounding dendron group will operate so that the fullerene moieties are separated from each other.…”

Cycloadditions

“…The electronic absorption spectra of C 60 and [5,6] and [6,6] methano-bridged cycloadducts (monoadducts) exhibit almost the same features in the UV region, consisting of three dominant bands at 325, 259 and 219 nm [103,106,108,126,129,154]. In the visible region, however, the spectra of the ring-closed 1,2-bridged adducts differ significantly from those of C 60 and the open 1,6-bridged isomers (Figure 4.7) [129].…”

“…Due to the higher similarity between the π-systems of [5,6]methanofullerene and C 60 the potential shift in the ring-opened isomer is not as pronounced as in the ringclosed isomer [116]. Some representative examples are derivatives functionalized with electroactive moieties such as π-extended TTF [124], quinone or anthraquinone [119,120], acetylene dendrimers [125,126], metal complexes [127,128], porphyrin [153], aniline [121] or DMAP [123]. Charge-transfer properties have been examined in various methanofullerenes.…”

Organofullerene Materials

“…An important field where the cyclopropanation reaction finds growing application is the construction of dendrimers possessing fullerenes either as functional cores [26][27][28][29][30][31][32][33] or branches [34][35][36][37][38]. Dendrimers can serve as building blocks for the construction of organized materials with nanosize precision due to the well-defined three-dimensional structure they possess.…”