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The use of b
lends in which a mesogen induces mesomorphism into a non-mesogenic compound hasmade possib
le the se
lf-organization of phtha
locyanine-[60]fu
llerene (Pc-C
60) dyads into
liquid crysta
ls.Pc-C
60 dyads
1,
2, or
3, in which two photoactive units are brought together by a pheny
leneviny
lenespacer, have been synthesized through a Heck reaction that
links 4-viny
lbenza
ldehyde to a monoiodophtha
locyanine precursor, fo
llowed by standard cyc
loaddition of azomethine y
lides-generated from theformy
lPc derivative and
N-methy
lg
lycine-to one of the doub
le bonds of C
60. The mesomorphic andtherma
l properties of different mixtures formed by the
liquid-crysta
lline phtha
locyanine
4 and dyads
1,
2, or
3 were examined using po
larizing optica
l microscopy (POM), differentia
l scanning ca
lorimetry(DSC), and X-ray diffraction (XRD). DSC diagrams of the b
lends show c
lear transitions from the crysta
llinestate to a mesophase, and the measured structura
l parameters obtained from the powder diffractionexperiments are consistent with a discotic hexagona
l co
lumnar (Co
lh) structure. Considering that segregationin domains of separated mo
lecu
les of Pc-C
60 dyad and phtha
locyanine
4 wou
ld prec
lude mesomorphismdue to the mismatch in the co
lumn diameter and to the
lack of mesogenic character of the pure dyads,a predominance of a
lternating stacking is proposed. Additiona
lly, the observed decrease in the ca
lcu
lateddensity of the b
lend mesophases re
lative to the mesophase of pure compound
4 is important evidence inthis direction.