Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Solution-state PL measurements, solid lines correspond to absorption and dashed lines correspond to emission (toluene absorption spectra were only 310 nm because of the solvent cutoff). (b) Absorption in the spectral region of 340–440 nm showing a weak solvent-dependent direct charge transfer transition below the lowest energy ππ* transition.
