caa a22 4500 465732305 CHVBK 20180323111744.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF02035800 doi (NATIONALLICENCE)springer-10.1007/BF02035800 Pulse radiolysis investigations on the reactions of primary radiolytic species of water with atropine [Elektronische Daten] [H. Mohan, P. Moorthy] On pulse radiolysis of N2O saturated aqueous solutions of atropine, an optical absorption band (λmax at 320 nm,e=2.81·103 dm3·mol−1·cm−1) was observed, which is assigned to the product of reaction of OH radicals with the solute. This absorption decayed following second order kinetics with a rate constant of 4.5·108 dm3·mol−1·s−1. The rate constant for the reaction of OH radicals with atropine as estimated by following the build-up kinetics is 2.7·109 dm3·mol−1·s−1. The H atoms also reacted with this compound to produce a transient absorption band behaving similarly to the one observed in the case of reaction with OH radicals. The transient species formed in both cases is assigned to a radical derived by H atom abstraction by H/OH radicals from the parent compound. This radical was unreactive towards 2-mercaptoethanol. e aq − was found to react with atropine forming a transient band with λmax at 310 nm (ε=3.55·103 dm3·mol−1). Its decay was also second order with a rate constant of 1.64·109 dm3·mol−1·s−1. The bimolecular rate constant for the reaction of e aq − with atropine as estimated from the decay of e aq − absorption at 720 nm is 3.9·109 dm3·mol−1·s−1. Specific one-electron oxidizing and reducing agents (such as Cl 2 − , Tl2+, SO 4 − and (CH3)2COH, CO 2 − , respectively) failed to oxidize or reduce this compound in aqoues solutions. The radical anion of atropine formed by its reaction with e aq − was found to reduce thionine and methyl viologen with bimolecular rate constant of 3.8·109 and 3.2·109 dm3·mol−1·s−1, respectively. Akadémiai Kiadó, 1990 Mohan H. Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut Moorthy P. Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 141/2(1990-08-01), 327-337 0236-5731 141:2<327 1990 141 10967 https://doi.org/10.1007/BF02035800 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02035800 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohan H. Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut NATIONALLICENCE 700 1- Moorthy P. Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay, India aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 141/2(1990-08-01), 327-337 0236-5731 141:2<327 1990 141 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer