66127-01-3Relevant articles and documents
Photobiological activity of Ru(ll) dyads based on (Pyren-1 -yl)ethynyl derivatives of 1, 10-Phenanthroline
Monro, Susan,Scott, John,Chouai, Abdellatif,Lincoln, Richard,Zong, Ruifa,Thummel, Randolph P.,McFarland, Sherri A.
body text, p. 2889 - 2900 (2010/05/15)
Several mononuclear Ru(ll) dyads possessing 1, 10-phenanthrollne-appended pyrenylethynylene llgands were synthesized, characterized, and evaluated for their potential in photobiologlcal applications such as photodynamlc therapy (PDT). These complexes interact with DNA via intercalation and photocleave DNA in vitro at submlcromolar concentrations when irradiated with visible light (λirr ≥ 400 nm). Such properties are remarkably sensitive to the position of the ethynylpyrenyl substituent on the 1, 10-phenanthroline ring, with 3-substitutlon showing the strongest binding under all conditions and causing the most deleterious DNA damage. Both dyads photocleave DNA under hypoxic conditions, and this photoactlvity translates well to cytotoxicity and photocytotoxlcity models using human leukemia cells, where the 5- and 3-substituted dyads show photocytotoxiclty at 5-10μM and 10-20μM, respectively, with minimal, or essentially no, dark toxicity at these concentrations. This lack of dark cytotoxicity at concentrations where significant photoactlvity Is observed emphasizes that agents with strong intercalating units, previously thought to be too toxic for phototherapeutic applications, should not be excluded from the arsenal of potential photochemotherapeutic agents under investigation.
Liquid-crystalline phenanthrolines
Bousquet,Bruce
, p. 1769 - 1771 (2007/10/03)
The synthesis and mesomorphism of the first liquid-crystalline phenanthrolines are reported.