Luminescence behaviour of stable europium and terbium complexes of tetraaza phosphinates: efficient through-space energy transfer from phenyl to terbium
difficult to induce arbitrary photochemical reactions on specific molecules because of their poor molecular selectivity. Here we report a selective and nontoxic photochemical reaction system utilizing photoactivated mesoporous silica nanoparticles to control biological functions. Methylene blue modification within nanoparticle pores for photosensitization producedsingletoxygen confined to the pore that
New dioxocyclam derivatives bearing two anthracene fluorophores were prepared, and their fluoroionophoric properties toward transition metal ions were investigated. Chemosensor 2 having anthrylacetamide moieties exhibited pronounced Hg2+ and Cu2+-selectivefluoroionophoric properties in aqueous acetonitrile solution over other representative transition metal ions, as well as alkali and alkaline earth metal ions. Chemosensor 2 also exhibited Hg2+ and Cu2+ selectivity under competitive conditions in the presence of physiologically and environmentally important metal ions. The detection limits for the sensing of Hg2+ and Cu2+ ions were 7.8 x 10(-6) and 1.5 x 10(-6) M, respectively, in aqueous 95% acetonitrile solution. (C) 2007 Elsevier Ltd. All rights reserved.
Inducing apoptosis through upregulation of p53: structure–activity exploration of anthraquinone analogs
作者:Abiodun Anifowose、Ayodeji A. Agbowuro、Ravi Tripathi、Wen Lu、Chalet Tan、Xiaoxiao Yang、Binghe Wang
DOI:10.1007/s00044-020-02563-y
日期:2020.7
We previously reported a series of p53-elevating anthraquinone compounds with considerable cytotoxicity for acute lymphoblastic leukemia (ALL) cells. To further develop this class of compounds, we examined the effect of a few key structural features on the anticancer structure–activity relationship (SAR) in ALL cells. The active analogs showed comparable cytotoxicity and upregulation of p53 but did
Luminescence behaviour of stable europium and terbium complexes of tetraaza phosphinates: efficient through-space energy transfer from phenyl to terbium
Anionic and neutral complexes of europium and terbium with tetraaza phosphinate ligands are formed rapidly and are kinetically stable in vivo; the tetrakis(benzylphosphinate) terbium complex luminesces strongly via excitation into the proximate benzyl group involving efficient intramolecular energy transfer.