Micellar effect on the photophysics of heteroleptic ruthenium(II)–phenanthrolinedisulfonato complexes

Abstract

Luminescent heteroleptic ruthenium(II) complexes of type RuLn X(3-n) [L = 1,10-phenanthroline (phen), X = 4,7 diphenyl phenanthroline disulfonate, (dpsphen) n = 0,1,2,3] were synthesized and their photophysical properties investigated in homogeneous and cationic (CTAB), anionic (SDS) and nonionic (Triton X-100) micelles. The luminescent quantum yield and lifetime of the complexes were found to increase in the presence of micellar media and on the introduction of a disulfonate ligand into the coordination sphere. Both electrostatic and hydrophobic interactions play an important role in the micellar media. Thus, by changing the nature of the ligands and the medium, we were able to tune the photophysical properties of Ru(II) complexes.

Ru(ii) polypyridyl complex-incorporated and folate-conjugated vehicle for cancer cell imaging and photoinduced inactivation

“…This shift was attributed to the encapsulation of f-LPs, resulting in the change in the environment for the ruthenium(II) complexes. 36,37 The fluorescence microscopy results showed that f-LP-Ru was mono-dispersed and single particle luminescence was visible (Fig. 3b).…”

Heteroleptic Ruthenium(II) Complexes with Bathophenanthroline and Bathophenanthroline Disulfonate Disodium Salt as Fluorescent Dyes for In-Gel Protein Staining

“…Therefore, we prepared Ru II heteroleptic complexes with different overall charge by varying the number of BP and BPS ligands. Despite their potential interest in proteomic applications, heteroleptic metal complexes with BPS have been scarcely described in the literature. ,− To ascertain the structure of Ru complexes, full assignment of their 1 H/ 13 C/ 15 N NMR spectra has been performed along with high-resolution mass spectrometry (MS) and MALDI-TOF/TOF tandem mass spectrometry (MS/MS) studies. The stability of the complexes in solution was investigated by electrochemistry.…”