2026-04-17T21:25:59Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1363792025-12-05T12:45:24Zcom_2072_1057col_2072_478916col_2072_478917col_2072_478933

00925njm 22002777a 4500 dc Presa i Rodríguez, Andreu author Vázquez Bigas, Guillem author Barrios Moreno, Leoní Alejandra author Roubeau, Olivier author Korrodi-Gregório, Luís author Pérez Tomás, Ricardo E. author Gámez Enamorado, Patrick author 2019-07-03T08:07:20Z 2019-07-03T08:07:20Z 2018-04-02 2019-07-03T08:07:21Z The development of photoactivatable metal complexes with potential anticancer properties is a topical area of current investigation. Photoactivated chemotherapy using coordination compounds is typically based on photochemical processes occurring at the metal center. In the present study, an innovative approach is applied that takes advantage of the remarkable photochemical properties of diarylethenes. Following a proof-of-concept study with two complexes, namely, C1 and C2, a series of additional platinum(II) complexes from dithienylcydopentene-based ligands was designed and prepared. Like C1 and C2, these new coordination compounds exhibit two thermally stable, interconvertible photoisomers that display distinct properties. The photochemical behavior of ligands L3-L7 has been analyzed by H-1 NMR and UV-vis spectroscopies. Subsequently, the corresponding platinum(II) complexes C3-C7 were synthesized and fully characterized, including by single-crystal X-ray diffraction for some of them. Next, the interaction of each photoisomer (i.e., containing the open or closed ligand) of the metal complexes with DNA was examined thoroughly using various techniques, revealing their distinct DNA-binding modes and affinities, as observed for the earlier compounds C1 and C2. The antiproliferative activity of the two forms of the complexes was then assessed with five cancer cell lines and compared with that of C1 and C2, which supported the use of such diarylethene-based systems for the generation of a new class of potential photochemotherapeutic metallodrugs. Ruteni Compostos de coordinació Lligands Ruthenium Coordination compounds Ligands Photoactivation of the cytotoxic properties of platinum(II) complexes through ligand photoswitching