| abstract |
Use of a compound selected from a list of compounds (a) to (i), (aa) and (cc) in the authentication of a product by detecting the resonance of the compound in the range of 0.1 to 10 THz, where the Compounds are selected from: a) N, N '- (pyridine-2,6-diyl) dipropionamide (PrDAP); b) N, N '- (pyridine-2,6-diyl) bis (4- (hexyloxy) benzamide) (C6OPhDAP); c) N- (6-propionamidopyridin-2-yl) benzamide (Pr-PhDAP); d) N- (6-benzamidopyridin-2-yl) -4-nitrobenzamide (4-NO2Ph-PhDAP); e) N- (6- (3-phenylureido) pyridin-2-yl) benzamide (PhU-PhAP); f) 4-fluoro-N- (6-propionamidopyridin-2-yl) benzamide (4-FPh-PrDAP); g) 4-chloro-N- (6-propionamidopyridin-2-yl) benzamide (4-ClPh-PrDAP); h) 4-bromo-N- (6-propionamidopyridin-2-yl) benzamide (4-BrPh-PrDAP); i) 4-iodo-N- (6-propionamidopyridin-2-yl) benzamide (4-IPh-PrDAP); aa) 4-nitro-N- (6-propionamidopyridin-2-yl) benzamide (4-NO2Ph-PrDAP); cc) N, N '- (pyridine-2,6-diyl) bis (thiophene-2-carboxamide) (Th-DAP). |