Charge-Transfer Complexation of C with Diphenyltetrathiafulvalene

m 0 7 r m a d s a t p f t u 4,4*-Diphenyltetrathiafulvalene (DPTTF) capped gold nanoarticles of 3to 5-nm diameter have been prepared and their hermal stability has been investigated by variable temperature T–IR spectroscopy. The DPTTF molecules at the cluster surface ndergo charge-transfer complexation with C60 to form Au/ PTTF.C60. Direct evidence of complexation is observed in the -ray photoelectron and infrared spectra of the clusters. The orintational ordering transition of C60 in Au/DPTTF.C60 clusters ccur at a higher temperature than pure C60 indicating increased esistance to orientational disorder due to charge transfer. Varible-temperature infrared spectroscopic studies yield complemenary information. Both FT–IR and mass spectra show that some of he sites on the gold surface are occupied by the phase-transfer eagent used in the cluster preparation. © 1999 Academic Press