Fig. 2: Photophysical properties of multicomponent copolymer at room temperature.
From: Color-tunable ultralong organic room temperature phosphorescence from a multicomponent copolymer
a Excitation–phosphorescence mapping of polymer film PDNA under ambient conditions. The inset displays the phosphorescence spectra of the transparent film recorded at room temperature excited by 254 nm (blue) and 365 nm (yellow). b CIE chromaticity diagram for polymer PDNA with excitation varied from 270 to 370 nm. Inset: long-lived luminescence photographs of polymer film PDNA excited at 270, 290, 310, 330 and 370 nm, respectively. c, d Time-resolved emission spectra of PDNA at room temperature upon excitation at 280 and 360 nm, respectively. e Normalized phosphorescence spectra and the ultralong phosphorescence photographs (inserted images) of multicomponent copolymers with different molar feed ratio of MND:MDP:AA = 1:5:1000 (PDNA-5), 1:10:1000 (PDNA-10), 1:20:1000 (PDNA-20), 1:40:1000 (PDNA-40), and 1:100:1000 (PDNA-100) excited at 254 nm. f Phosphorescence lifetime of PDNA with different molar feed ratios of PDNA-5, PDNA-10, PDNA-20, PDNA-40, and PDNA-100 at 445 (top) and 517 nm (bottom) when excited at 254 and 360 nm at room temperature, respectively.
