Properties and Exciting Facts About 3,4,7,8-Tetramethyl-1,10-phenanthroline

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Chemistry is traditionally divided into organic and inorganic chemistry. Product Details of 1660-93-1. The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 1660-93-1

Four new luminescent cyclometallated iridium(iii) bis(quinolylbenzaldehyde) diimine complexes [Ir(qba)2(NN)](PF6) (Hqba = 4-(2-quinolyl)benzaldehyde, NN = 2,2?-bipyridine, bpy (1); 1,10-phenanthroline, phen (2); 3,4,7,8-tetramethyl-1,10-phenanthroline, Me 4-phen (3); 4,7-diphenyl-1,10-phenanthroline, Ph2-phen (4)) have been synthesised and characterised, and their electronic absorption, emission and electrochemical properties investigated. The X-ray crystal structures of complexes 1 and 2 have been determined. Upon irradiation, complexes 1-4 exhibited intense and long-lived orange-yellow emission in fluid solutions at 298 K and in alcohol glass at 77 K. The emission has been assigned to a triplet intra-ligand (3IL) excited state associated with the qba ligand, probably with mixing of some triplet metal-to-ligand charge-transfer (3MLCT) (dpi(Ir) ? pi*(qba)) character. Reductive amination reactions of complexes 1-4 with the protein bovine serum albumin (BSA) afforded the bioconjugates 1-BSA-4-BSA, respectively. Upon photoexcitation, these bioconjugates displayed intense and long-lived 3MLCT (dpi(Ir) ? pi*(NC)) emission in aqueous buffer at 298 K. The cross-linked nature of the Ir-BSA bioconjugates has been verified by SDS-PAGE. Additionally, the cytotoxicity of the complexes towards human cervix epithelioid carcinoma (HeLa) cells has been examined by 3-(4,5-dimethyl-2-thiazolyl)-2,5- diphenyltetrazolium bromide (MTT) assays, and the cellular uptake of complex 4 has been investigated by laser-scanning confocal microscopy and flow cytometry.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.category: catalyst-ligand, you can also check out more blogs about1660-93-1

Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI