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- W2028796175 abstract "Abstract Oxovanadium(IV) complexes [VO(N‐N‐N)(N‐N)](NO 3 ) 2 ( 1 – 4 ) of (4′‐phenyl)‐2,2′:6′,2″‐terpyridine (ph‐tpy in 1 and 2 ) or (4′‐pyrenyl)‐2,2′:6′,2″‐terpyridine (py‐tpy in 3 and 4 ) having N‐N as 1,10‐phenanthroline (phen in 1 and 3 ) or dipyrido[3,2‐ a :2′,3′‐ c ]phenazine (dppz in 2 and 4 ) are prepared and characterized. The crystal structure of 1 has VO 2+ group in VN 5 O coordination geometry. The terpyridine ligand coordinates in a meridional binding mode. The phen ligand displays a chelating mode of binding with an N‐donor site trans to the vanadyl oxo group. The complexes show a d‐d band in the range of 710–770 nm in aqueous DMF (4:1 v/v). The complexes exhibit an irreversible V IV /V III redox response near –1.0 V vs. SCE in aqueous DMF/0.1 M KCl. The complexes bind to CT DNA giving K b values within 3.5 × 10 5 to 1.2 × 10 6 M –1 . The complexes show poor chemical nuclease activity in dark. Complexes 2 – 4 show photonuclease activity in UV‐A light of 365 nm forming 1 O 2 and · OH. Complex 4 shows DNA photocleavage activity at near‐IR light of 785 nm forming · OH radicals. Complexes 2 and 4 show significant photocytotoxicity in HeLa cancer cells. Uptake of the complexes in HeLa cells, studied by fluorescence imaging, show predominantly cytosolic localization inside the cells." @default.
- W2028796175 created "2016-06-24" @default.
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- W2028796175 date "2011-02-04" @default.
- W2028796175 modified "2023-09-26" @default.
- W2028796175 title "Terpyridine Oxovanadium(IV) Complexes of Phenanthroline Bases for Cellular Imaging and Photocytotoxicity in HeLa Cells" @default.
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- W2028796175 doi "https://doi.org/10.1002/ejic.201001097" @default.
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