id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-280292-90i45kjk	Daescu, Monica	Photoluminescence as a Valuable Tool in the Optical Characterization of Acetaminophen and the Monitoring of Its Photodegradation Reactions	2020-10-07		.txt	text/plain	5165	238	61	The chemical interaction of AC with the NaOH solutions, having the concentration ranging between 0.001 and 0.3 M, induces a gradual enhancement of the photoluminescence excitation (PLE) and PL spectra, when the exposure time of samples at the UV light increases until 140 min, as a result of the formation of p-aminophenol and sodium acetate. According to Figure 2b -e, after 140 min of exposure to UV light, the AC interacted with the NaOH solutions having the concentrations equal to 10 −3 , 10 −2 , 10 −1 and 0.3 M, the intensity of the PL spectra is equal to 6.09 × 10 5 , 3.1 × 10 5 , 7.5 × 10 4 and 2.3 × 10 4 counts/sec, respectively. The interaction of the aqueous solution of Paracetamol with NaOH leads to a shift of the PLE band from 323 nm (Figure 3a ) to 337 nm (Figure 3c ), the subsequent exposure at UV light for 140 min inducing an intensity increase of the PLE band from 2.98 × 10 6 to 1.74 × 10 7 counts/sec.	./cache/cord-280292-90i45kjk.txt	./txt/cord-280292-90i45kjk.txt