Fig. 2: Preparation and RTP emission of P-Lig and P-Lig/RhB.
From: Photocured room temperature phosphorescent materials from lignosulfonate
a ESR spectra of lignosulfonate in ionic liquid upon UV irradiation for 0 min (blue line), 5 min (red line) and 15 min (black line) in the presence of DMPO; b Conversion of double bonds of P-Lig upon UV irradiation(λexc.= 320 nm, λcollected = 510 nm, delay time = 10 ms); c Images of P-Lig (left) and P-Lig/RhB (right); d Standard (black line) and delayed (red line) emission spectra of P-Lig upon excitation with 320 nm light, Inset: the images of P-Lig in daylight (left), P-Lig upon excitation with a UV light source (middle) and P-Lig after switching off the UV light source (right), the delay time for the measurements was 10 ms; e RTP intensity (blue line) and lifetime (red line) of P-Lig obtained by different photocuring durations (λexc.= 320 nm, λcollected = 510 nm, delay time = 10 ms); f Standard (blue line) and delayed (red line) emission spectra of P-Lig/RhB upon excitation with 320 nm light, Inset: the images of P-Lig/RhB in daylight (left), P-Lig/RhB upon excitation with a UV light source (middle) and P-Lig/RhB after switching off the UV light source (right), the delay time for the measurements was 10 ms.
