174278-67-2Relevant academic research and scientific papers
Energy transfer processes in novel subphthalocyanine-fullerene ensembles
Gonzalez-Rodriguez, David,Torres, Tomas,Guldi, Dirk M.,Rivera, Jose,Echegoyen, Luis
, p. 335 - 338 (2002)
(Image Presented) A series of subphthalocyanine-C60 dyads in which the two subunits are placed at different distances have been prepared and their electrochemical properties measured. Photophysical measurements reveal energy transfer events fol
Microwave-assisted functionalization of carbon nanostructures in ionic liquids
Guryanov, Ivan,Toma, Francesca Maria,Montellano Lopez, Alejandro,Carraro, Mauro,Da Ros, Tatiana,Angelini, Guido,D'Aurizio, Eleonora,Fontana, Antonella,Maggini, Michele,Prato, Maurizio,Bonchio, Marcella
, p. 12837 - 12845 (2009)
The effect of microwave (MW) irradiation and ionic liquids (IL) on the cycloaddition of azomethine ylides to [60]fullerene has been investigated by screening the reaction protocol with regard to the IL medium composition, the applied MW power, and the sim
Design, synthesis and photophysical studies of phenylethynyl-bridged phthalocyanine-fullerene dyads
Arero, Jaro,Kodis, Gerdenis,Schmitz, Robert A.,Mendez-Hernandez, Dalvin D.,Moore, Thomas A.,Moore, Ana L.,Gust, Devens
, p. 934 - 945 (2015/09/02)
A zinc and a free base phthalocyanine-fulleropyrrolidine dyad in which the chromophores are linked by a phenylethynyl group have been prepared using a new synthetic route, and their photoelectrochemical properties have been investigated. The zinc dyad is
Fullerene-fluorescein-anthracene hybrids: A model for artificial photosynthesis and solar energy conversion
Jing, Bingwen,Zhu, Daoben
, p. 221 - 224 (2007/10/03)
Two novel C60-fluorescein-anthracene hybrids have been synthesized. Fluorescence quenching in the hybrids indicates an energy transfer from the excited state of anthracene to fluorescein and photoinduced intramolecular electron transfer from the excited state of fluorescein to the C60 moiety.
Solvent-free reactions of fullerenes and N-alkylglycines with and without aldehydes under high-speed vibration milling
Wang, Guan-Wu,Zhang, Ting-Hu,Hao, Er-Hong,Jiao, Li-Juan,Murata, Yasujiro,Komatsu, Koichi
, p. 55 - 60 (2007/10/03)
The solvent-free reactions of fullerenes and N-alkylglycines with and without aldehydes (RCHO) 2a-e under high-speed vibration milling (HSVM) conditions have been investigated. Fulleropyrrolidines 4a-e (C60(CH2N(CH3)CHR), R=H (4a), C6H5 (4b), p-NO2-C6H4 (4c), p-CH3O-C6H4 (4d), p-(CH3)2N-C6H4 (4e)) were obtained in moderate yields from reactions of C60 with aldehydes 2a-e and N-methylglycine (Prato reaction). In all these solvent-free reactions, 4a was found to be formed besides 4b-e, indicating that fullerenes can react with N-substituted glycines in the absence of aldehyde to give fulleropyrrolidines. For this novel reaction, a possible reaction mechanism involving an electron transfer process has been proposed. Intrigued by this observation, the dependence of the yield on the reagent ratio for the reaction of C60 with paraformaldehyde and/or N-methylglycine was examined to search the optimal conditions. The reaction of C70 with paraformaldehyde and/or N-methylglycine under HSVM conditions was also studied and was found to give the positional isomers of [70]fulleropyrrolidines.
Linear free-energy relationship for electron-transfer processes of pyrrolidinofullerenes with tetrakis(dimethylamino)ethylene in ground and excited states
Luo, Chuping,Fujitsuka, Mamoru,Huang, Chun-Hui,Ito, Osamu
, p. 2923 - 2928 (2007/10/03)
Systematic studies of electron-transfer processes in the ground states and excited triplet states of pyrrolidinofullerenes {C60(C3H6N)R [R = H (1), p-C6H4NO2 (2), p-C6H4CHO (3), p-C6H5 (4), p-C6H4Me (5), p- C6H4NMe2 (6)]} with tetrakis(dimethylamino)ethylene (TDAE) have been carried out by steady-state and transient absorption measurements in the visible-NIR region. Analyses of the equilibria of the electron-transfer processes in the ground states indicate that free ion radicals are produced in polar solvents. Photoinduced electron-transfer processes via (T)(C60(C3H6N)R)* were observed by applying a perturbation to the equilibria of the electron-transfer reactions in the ground states by laser flash photolysis. Based on the relationship of the thermodynamic data and kinetic data, the electron-transfer rate constants in the ground states (k(et)/(G)) can be evaluated. The k(et)/(G) values are affected by the substituents to a smaller extent compared with the equilibrium constants (K) in polar solvents; α = 0.6 in Δ log k(et)/(G) = α Δ log K. This α value indicates that the activation energies of forward electron transfer in the ground states vary moderately with the thermodynamic stabilities of (C60(C3H6N)R).-. Electron-transfer rate constants via (T)(C60(C3H6N)R)* which are close to the diffusion-controlled limit, do not show a large substituent effect (α = 0), because of their highly exothermic processes. Such a linear free-energy relationship can be extended to other systems such as (T)(C60(C3H6N)R)*/N,N-dimethylaniline, from which valuable information for electron-transfer processes can be obtained.
