Carbazole-based donor-acceptor compounds: highly fluorescent organic nanoparticles.
Carbazole-based donor-acceptor compounds 1,2-dicyano-trans-1,2-bis-4-(carbazolyl)phenylethylene (1) and 1,2-dicyano-trans-1,2-bis-4-(3,6-di-tert-butylcarbazolyl)phenylethylene (2) were synthesized. 1 and 2 show negative solvatochromic absorption behavior, but show both positive and negative solvatochromic behavior in the fluorescence spectra. In a water/THF mixture, 1 as well as 2 aggregate into 50-150 nm nanoparticles. The emission of nanoparticles of the new types of fluorescent organic nanoparticles (FONs) 1 and 2 is much higher than that of either 1 or 2 in solution.
Palayangoda
Sujeewa S
SS
Center for Photochemical Sciences,1 Bowling Green State University, Bowling Green, Ohio 43403, USA.
Cai
Xichen
X
Adhikari
Ravi M
RM
Neckers
Douglas C
DC