Near-IR Photoresponse of Ruthenium Dipyrrinate Terpyridine Sensitizers in the Dye-Sensitized Solar Cells
作者:Guocan Li、Aswani Yella、Douglas G. Brown、Serge I. Gorelsky、Mohammad K. Nazeeruddin、Michael Grätzel、Curtis P. Berlinguette、Michael Shatruk
DOI:10.1021/ic5006538
日期:2014.6.2
Coordination of bidentate 5-pentafluorophenyldipyrrinate (pfpdp) or 5-(2-thienyl)dipyrrinate (2-tdp) to a Ru-II center bearing 2,2':6',2 ''-terpyridine-4,4',4 ''-tricarboxylate (tctpy) and a NCS- ligand results in strongly light-absorbing complexes [Ru(tctpy)(L)(NCS)] (L = pfpdp or 2-tdp). Anchored to a mesoporous TiO2 electrode, these complexes afford a photoaction spectral response at wavelengths of up to 950 nm, one of the most red-shifted values reported to date for molecular dyes in the dye-sensitized solar cell (DSSC).
Synthesis, characterization, DNA binding and cytotoxicity of fluoro-dipyrrin based arene ruthenium(II) complexes
Synthesis of four new arene ruthenium(II) complexes [(eta(6)-C10H14)RuCl(MFPdpm)] (1); [(eta(6)-C12H18)Ru-Cl (MFPdpm)] (2); [(eta(6)-C10H14)RuCl(PFPdpm)] (3) and [(eta(6)-C12H18)RuCl(PFPdpm)] (4) containing dipyrrin ligands 5-(4-fluoro)phenyldipyrromethene (MFPdpm) and 5-(penta-fluoro)phenyldipyrromethene (PFPdpm) have been described. The ligands and complexes have been thoroughly characterized by elemental analyses, spectroscopic studies (ESI-MS, IR, H-1, C-13 NMR, UV-Vis) and structure of the representative complex 4 determined by X-ray single crystal analyses. DNA binding activities of 1-4 have been investigated by UV-Vis and fluorescence spectroscopy and their binding through the minor groove of DNA has been established by molecular docking studies. The complexes 1-4 exhibit significant cytotoxicity toward human lung cancer cell line (A549). Cytotoxicity, morphological changes, and apoptosis studies have been evaluated through MIT assay, Hoechst 333421131 staining, and cell cycle analysis by fluorescence activated cell sorting (FACS). In vitro antitumor activity and cytotoxicity of the complexes lie in the order 4 > 3 > 2 > 1. (C) 2016 Elsevier B.V. All rights reserved.