Akademik Veri Yönetim Sistemi
Applied Materials Today, cilt.44, 2025 (SCI-Expanded, Scopus)
One of the most important problems of peroxide-based explosives is their determination in intact form without preliminary conversion to H2O2. We have overcome this difficulty by developing an innovative approach for directly determining intact triacetone triperoxide (TATP) for the first time. Herein, nitrogen- and oxygen-doped carbon quantum dots (APT-CDs; Ascorbic acid-Polyethyleneimine-Triethylenetetramine Carbon quantum Dots) with high quantum yield (66.8 %) were synthesized via microwave-assisted method. The fluorescence of APT-CDs, which exhibits blue-fluorescence, is quenched in the presence of acetone by photoinduced electron transfer (PET) and hydrogen-bonding mechanisms. By adding intact TATP in the critical concentration range to an acetone solution of APT-CDs at quenched fluorescence, a significant portion of the initial fluorescence is recovered. The recovered fluorescence can be monitored both by spectrofluorometry and smartphone-application. TATP forms molecular aggregates as a result of noncovalent interactions with acetone molecules that interact (via H-bonding) with APT-CDs at ground-state, thereby interrupting the interaction of a certain part of acetone molecules with carbon dots. This method provides a TATP detection limit (LOD) of 0.18 nmol L-1 (0.75 nmol L-1 for smartphone-application). TATP determination occurs with high recoveries (94.2 %–105.7 %), and possible interferents do not have a significant effect on TATP determination.