Synthesis of [60]fullerene–coumarin polyads

Nucleophilic cyclopropanation of [60]fullerene by the addition–elimination mechanism

“…Therefore, studies aimed at the synthesis of new covalentbound fullerene-coumarin diads 250, 251 (ref. 131) and 252, 253, 132 as well as studies of their photophysical properties ( Fig. 14) are quite timely.…”

Synthesis of novel coumarin and benzocoumarin derivatives and their biological and photophysical studies

“…Herein, luminescence spectra (excitation and emission) for the prepared benzocoumarin derivatives have been recorded on a double monocromator Fluorolog 1902 insturment from Spex. The source was a 400 W Hg-Xe high pressure lamp using 1 cm [46][47][48][49][50] quartz cell in 2-methyltetrahydrofuran solvent at room temperature. Fluorescence quantum yield for the studied compounds determined in reference to 9,10-diphenylanthracene [47].…”

“…The source was a 400 W Hg-Xe high pressure lamp using 1 cm [46][47][48][49][50] quartz cell in 2-methyltetrahydrofuran solvent at room temperature. Fluorescence quantum yield for the studied compounds determined in reference to 9,10-diphenylanthracene [47]. Solutions of the recorded samples were prepared under an Ar atmosphere to avoid any possible quenching by atmospheric O 2 .…”

Investigation of PCBM Concentration on the Performance of Small Organic Solar Cell

“…Novel iminocoumarin dyes having carboxyl and hydroxyl anchoring groups onto the dyes skeletons have been designed and synthesized by Kandavelu et al [13] for the application of dye-sensitized nanocrystalline TiO 2 solar cells. Fullerene-(C 60 -) based donor-acceptor polyads were synthesized by Brites et al [14], in which C 60 as an acceptor material was covalently linked to some of coumarin dyes as donor materials, towards practical applications such as photovoltaic devices for solar energy conversion. When selecting donor and acceptor material pair for photovoltaic application, one needs to consider their energy levels.…”