The control of the morphologies, structures and photoluminescence properties of C70 nano/microcrystals with different trichlorobenzene isomers
Trichlorobenzene isomers with different molecular structures (1,2,3-, 1,2,4- and 1,3,5-trichlorobenzene) were used as shape and luminescence tuners of C70 nano/microcrystals. C70 nano/microcrystals with different morphologies (nano/microrods, nano/microsheet clusters and nano/microballs) were synthesized. C70 nano/microballs fabricated using 1,3,5-trichlorobenzene have a simple cubic (sc) structure, and C70 nano/microcrystals obtained using other solvents have a face-centered-cubic (fcc) structure. Meanwhile, the introduction of different trichlorobenzenes in the C70 nano/microcrystals enhanced their PL intensities to different degrees. In particular, the PL intensities of the C70 nano/microcrystals doped with 1,3,5-trichlorobenzene were most highly enhanced, which is one order of magnitude higher than that for the pristine bulk C70 crystals.