Fig. 3
From: Enabling long-lived organic room temperature phosphorescence in polymers by subunit interlocking

Photoluminescence investigation of polymers with different ion linkers in solid state under ambient conditions. a Chemical structures of PSSLi, PSSK, PSSRb, and PSSNH4 polymers. b Steady-state photoluminescence (dash lines) and phosphorescence (solid lines) spectra of PSSLi, PSSK, PSSRb, and PSSNH4 polymers, respectively. c Photographs of PSSLi, PSSK, PSSRb, and PSSNH4 polymers taken before (left) and after (right) turn-off of a 365 nm UV lamp. d Lifetime profiles of the phosphorescence emission bands at 550 nm for PSSLi, PSSK, PSSRb, and PSSNH4 polymers excited by 365 nm