Photoelectron-transfer catalysis: its connections with thermal and electrochemical analogs

Physico-chemical treatment methods for the removal of microcystins (cyanobacterial hepatotoxins) from potable waters

“…13 They found that the toxin disappeared with little difficulty and was dependent on the free chlorine dose. Following a 30 minute treatment 99% toxin removal was observed for free chlorine concentration of 2.8 mg dm 23 , while only 35% destruction was achieved at a level of 0.7 mg dm 23 with contact time of 60 minutes. Several reaction products were observed by HPLC one of which was identified as a dihydroxy-microcystin.…”

“…19 It should be noted however that a number of other reports have suggested a solution structure where the ADDA group is not bent in such a fashion. 23,24 This suggests that the geometry is not appropriate for an internal cycloaddition. However, Bagu found that the ADDA side chain is sufficiently flexible 23 that in principle it could momentarily position itself favourably for the cycloaddition to occur.…”

Diels-Alder reaction between indoles and cyclohexadienes photocatalyzed by a (thia)pyrylium salt

“…The efficiency of the subsequent processes can depend on spin multiplicity. 16 Triplets are usually longer-lived, which allows the partners to diffuse and react. Moreover, back electron transfer is slow within the triplet radical ion pairs, facilitating cage escape.…”

Eficiência fotodinâmica dos fenotiazínicos em mitocôndrias e células tumorais

“…AM é conhecido por reagir com coenzimas reduzidas (NADH e NADPH) em solução, formando a espécie reduzida de AM (leuco AM) e coenzimas oxidadas. Essa reação é estimulada pela excitação eletrônica do AM devido a um aumento na afinidade por elétrons da sua espécie excitada (9,23 …”