Transferência de elétron inversa na quimiexcitação da reação peróxi-oxalato usando ativadores facilmente redutíveis

Química Nova

Fernando Heering Bartoloni¹  Luiz Francisco Monteiro Leite Ciscato¹  Felipe Alberto Augusto¹  Wilhelm Josef Baader¹ 

[1] ,Universidade de São Paulo Instituto de Química Departamento de Química FundamentalSão Paulo SP ,Brasil

关键词: chemiluminescence;    electron transfer;    organic peroxides;   

DOI  :  10.1590/S0100-40422010001000010

来源: SciELO

【 摘 要 】

Chemiluminescence properties of the peroxyoxalate reaction in the presence of activators bearing electron withdrawing substituents were studied, to evaluate the possible occurrence of an inverse electron transfer, from the peroxide intermediate to the activator, in its chemiexcitation step. Relative catalytic rate constants and singlet quantum yields were obtained for the peroxyoxalate reaction, using 9-chloro, 9,10-dichloro, 9-cyano and 9,10-dicyanoanthracenes as activators. The linear free-energy correlation of the relative rate constants with the activators' reduction potentials and the dependence of the quantum yields on the released energy confirm, for the first time, the occurrence of this inverse electron transfer.

【 授权许可】

CC BY-NC   
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