Letter reSeArCH
Extended Data Fig. 4 | Comparison of IR, absorption, emission and
Raman spectroscopy of 2 and 5. a, Observed IR spectra of GNRs 2 and 5
(blue and red lines) and IR spectrum of tetramer 10 (black line) predicted
by DFT calculations at the B3LYP/6-31G(d) level of theory. b, UV-vis
absorption spectra of GNRs 2 and 5 (blue and red lines). c, Emission
spectra of GNRs 2 and 5 (blue and red lines) excited at 320 nm. d, Raman
spectra of GNR 5 , obtained by excitation by a 532-nm laser.