Published: Jan. 1, 2024

Polymer-based organic room temperature phosphorescence (RTP) materials are of critical importance in light-emitting diodes, displays, and anti-counterfeiting applications. Nevertheless, the development heavy-atom-free that exhibit long RTP lifetimes high quantum yields via a straightforward, cost-effective, environmentally friendly preparation remains significant challenge. In this study, we design construct an sustainable highly efficient hydrogen-bonding network (QA/PAM) employing commercially available quinoline carboxylic acid (QA) derivatives water-soluble polymer polyacrylamide (PAM) with hydrogen bond capacity. By increasing conjugation degree number carboxyl groups QA, can effectively enhance π-π* n-π* transitions, thereby reducing energy gap between S1 T1 states, resulting offering ability to adjust colors from blue green subsequently yellow-green. Particularly, BQDA/PAM-0.3 wt% system shows average lifetime 392.46 ms QY 26.93% under 300 nm excitation at 297 K. Anti-counterfeiting patterns 2D code fabricated by BQDA/PAM solution screen printing be facilely deciphered mobile phone, potential applications optical digital information security for commercial production.

Language: Английский