ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 17(1), P. 1942 - 1952

Published: Dec. 16, 2024

Phenylacetylene derivatives serve as typical monomers for polyaddition reactions. In this study, we present a straightforward one-step protocol synthesizing polyacetylene P0 (undoped), P0.09 (doped with 0.09 mg/mL Fe3+), and carbonized polymer dots CPDs-Fe 0.13 Fe3+) using 4-aminophenylacetylene varying concentrations of Fe3+ via solvothermal addition carbonization (EtOH, 200 °C, 6 h, high-pressure reactor). The resulting P0, P0.09, exhibit green, light red, red luminescence maxima at 514 nm (quantum yield, QY = 20.08%), 623 (QY 8.17%), 645 9.03%), respectively. Structural morphological analyses indicate that altering the doping concentration reaction temperature results in transformation from amorphous, short-conjugated structure to low-crystallinity, fibrous, longer-conjugated finally highly crystalline, elliptical, largest-conjugated CPDs-Fe, These structural changes lead shift emission green CPDs-Fe. Density functional theory (DFT) calculations on substructures reveal coordination Fe3+/Fe2+ elongation alkene chain enhances conjugation interactions, reduces band gap, consequently induces emission. can be incorporated into poly(vinyl alcohol) (PVA) form CPDs-Fe@PVA composite film, which exhibits dual-mode fluorescence room-temperature phosphorescence tunable lifetimes, making it suitable anti-counterfeiting applications based phosphorescence. This study provides strategy converting CPDs tailored photonic properties, offering potential phosphorescence-based technologies.

Language: Английский