TY - JOUR
T1 - Synthesis and photoinduced intramolecular processes of fulleropyrrolidine- oligothienylenevinylene-ferrocene triads
AU - Oswald, Frédéric
AU - Islam, D. M.Shafiqul
AU - Araki, Yasuyuki
AU - Troiani, Vincent
AU - De La Cruz, Pilar
AU - Moreno, Andrés
AU - Ito, Osamu
AU - Langa, Fernando
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Two new triads based on N-methylfulleropyrolidine, oligothienylenevinylenes (nTV) and ferrocene (Fc), namely C60-nTV-Fc (n = 2, 4) have been synthesized. A HOMOLUMO gap as low as 1.09-1.11 eV was experimentally determined by cyclic voltammetry. In both polar and nonpolar solvents, photoinduced charge-separation (CS) processes in C60-nTV-Fc predominantly take place from the singlet excited states of C60 and nTV; this result was indicated by steady and time-resolved emission spectroscopy. In the case of C60-4TV-Fc, the CS state was indicated by the nanosecond transient absorption spectra. In C60-2TV-Fc, although the CS process was also confirmed by the fluorescence quenching in nonpolar and polar solvents, the lifetimes of the CS states were shorter than those of C60-4TV-Fc. It was revealed that the introduction of Fc donor moiety at the end of the longer nTV chain in the C60-nTV dyad systems effectively increases the CS efficiency and the lifetimes of CS states.
AB - Two new triads based on N-methylfulleropyrolidine, oligothienylenevinylenes (nTV) and ferrocene (Fc), namely C60-nTV-Fc (n = 2, 4) have been synthesized. A HOMOLUMO gap as low as 1.09-1.11 eV was experimentally determined by cyclic voltammetry. In both polar and nonpolar solvents, photoinduced charge-separation (CS) processes in C60-nTV-Fc predominantly take place from the singlet excited states of C60 and nTV; this result was indicated by steady and time-resolved emission spectroscopy. In the case of C60-4TV-Fc, the CS state was indicated by the nanosecond transient absorption spectra. In C60-2TV-Fc, although the CS process was also confirmed by the fluorescence quenching in nonpolar and polar solvents, the lifetimes of the CS states were shorter than those of C60-4TV-Fc. It was revealed that the introduction of Fc donor moiety at the end of the longer nTV chain in the C60-nTV dyad systems effectively increases the CS efficiency and the lifetimes of CS states.
KW - Electron transfer
KW - Ferrocene
KW - Fullerenes
KW - Oligothienylenevinylenes
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U2 - 10.1002/chem.200601889
DO - 10.1002/chem.200601889
M3 - Article
C2 - 17295368
AN - SCOPUS:34250335566
SN - 0947-6539
VL - 13
SP - 3924
EP - 3933
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 14
ER -