%0 Journal Article %T Photo-oxidation of tertiary amides, main degradation products of large malonamides %+ Laboratoire de Génie de l'Environnement Industriel (LGEI) %+ CEA/DEN, Service d'étude des systèmes de confinement, CEA Valrho-Marcoule %A Delavente, Franck %A Guillot, Jean-Michel %A Thomas, Olivier %A Berthon, Laurence %A Nicol, Christine %< avec comité de lecture %@ 1010-6030 %J Journal of Photochemistry and Photobiology A: Chemistry %I Elsevier %V 162 %N 1 %P 81-88 %8 2004-02 %D 2004 %R 10.1016/S1010-6030(03)00314-9 %K Photodegradation %K Tertiary amide %K Diamide %K Oxidation %Z Engineering Sciences [physics]Journal articles %X Photo-oxidation of large malonamides N,N′-dimethyl, N,N′-dibutyl, tetradecyl malonamide (DMDBTDMA) and N,N′-dimethyl, N,N′-dibutyl, dodecylethoxy malonamide (DMDBDDEMA)—potential extractants for minor actinides in nuclear fuel reprocessing—leads mainly to the corresponding monoamides: N-butyl N-methyl hexadecanamide (BMHDA) and N-butyl N-methyl dodecyl oxy butanamide (BMDDOBA), respectively. The evolution of these main photoproducts was monitored during the degradation of malonamide solutions, and also pure monoamide solutions. Irradiation, for 1 h, with a low mercury pressure lamp can destroy BMHDA when diluted to 0.075 mol l−1 in n-dodecane. The two monoamides only differ by an ether bond and the weakness introduced by such a function in an alkyl chain is shown by slightly faster degradation. The relative weakness of BMDDOBA is independent of oxidant addition. Global degradation can be monitored by GC/FID or UV detection at 200 nm. %G English %L hal-03518988 %U https://imt-mines-ales.hal.science/hal-03518988 %~ CEA %~ INSTITUT-TELECOM %~ EM-ALES %~ AGROPOLIS %~ INSTITUTS-TELECOM