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Abstract
This work demonstrates the efficient photocleavage of DNA induced by a terbium complex. Mechanistic studies and DNA groove binding dependence were performed to better understand the photo-cleavage reaction, suggesting the presence of oxygen and carbon-centered radicals in the strand scission event. Furthermore, kinetic analyses were also achieved. The DNA photocleavage promoted by the title complex proceeds with a kobs of ~ 10.2 h− 1, a reaction rate useful in molecular biology practices, with a t1/2 of 4 min. This complex emerges as a new example of lanthanide compound with DNA cleavage ability by a non-hydrolytic mechanism.
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