TY - JOUR
T1 - C60 dimers connected through pleiadene bridges
T2 - Fullerenes talking to each other
AU - Sastre-Santos, Ángela
AU - Parejo, Concepción
AU - Martín-Gomis, Luis
AU - Ohkubo, Kei
AU - Fernández-Lázaro, Fernando
AU - Fukuzumi, Shunichi
PY - 2011/2/7
Y1 - 2011/2/7
N2 - New C60 dimers 1, 2 and 3 that differ in the distance between the two balls, connected through pleiadene bridges have been synthesized. Different synthetic strategies have been used to prepare C60 dimers 1-3. A diastereoisomeric mixture was obtained for C60 dimer 1, which was separated by column chromatography and characterized by NMR. By CV measurements, no interaction between the two balls was found in the ground state in any type of C60 dimer. By reduction with dimeric benzylnicotinamide [(BNA)2], a two electron reductant, the interaction between both C60 units has been analyzed using electron paramagnetic resonance (EPR). For C60 dimer 3, upon addition of 1 equivalent (BNA)2 no electronic interaction in the C 60--C60- was observed due to the long distance between the C60 balls (20 Å). However, for C 60 dimer 1, where the distance between radicals is shorter, 10 Å, the electronic interaction in the di(radical anion), C 60--C60- in the presence of 1 equivalent of (BNA)2 was observed by EPR, corresponding to a triplet biradical.
AB - New C60 dimers 1, 2 and 3 that differ in the distance between the two balls, connected through pleiadene bridges have been synthesized. Different synthetic strategies have been used to prepare C60 dimers 1-3. A diastereoisomeric mixture was obtained for C60 dimer 1, which was separated by column chromatography and characterized by NMR. By CV measurements, no interaction between the two balls was found in the ground state in any type of C60 dimer. By reduction with dimeric benzylnicotinamide [(BNA)2], a two electron reductant, the interaction between both C60 units has been analyzed using electron paramagnetic resonance (EPR). For C60 dimer 3, upon addition of 1 equivalent (BNA)2 no electronic interaction in the C 60--C60- was observed due to the long distance between the C60 balls (20 Å). However, for C 60 dimer 1, where the distance between radicals is shorter, 10 Å, the electronic interaction in the di(radical anion), C 60--C60- in the presence of 1 equivalent of (BNA)2 was observed by EPR, corresponding to a triplet biradical.
UR - http://www.scopus.com/inward/record.url?scp=78751511136&partnerID=8YFLogxK
U2 - 10.1039/c0jm02635b
DO - 10.1039/c0jm02635b
M3 - Article
AN - SCOPUS:78751511136
SN - 0959-9428
VL - 21
SP - 1509
EP - 1515
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
IS - 5
ER -