So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Haider, Johanna M.; Chavarot, Murielle; Weidner, Steffen; Sadler, Ian; Williams, Rene M.; De Cola, Luisa; Pikramenou, Zoe researched the compound: 4-(p-Tolyl)-2,2:6,2-terpyridine( cas:89972-77-0 ).Name: 4-(p-Tolyl)-2,2:6,2-terpyridine.They published the article 《Metallocyclodextrins as Building Blocks in Noncovalent Assemblies of Photoactive Units for the Study of Photoinduced Intercomponent Processes》 about this compound( cas:89972-77-0 ) in Inorganic Chemistry. Keywords: ruthenium tolylterpyridine functionalized cyclodextrin complex preparation luminescence; biphenylterpyridine terpyridine osmium complex preparation luminescence; electron transfer ruthenium tolylterpyridine functionalized cyclodextrin complex osmium metalloguest; quenching luminescence ruthenium tolylterpyridine functionalized cyclodextrin complex. We’ll tell you more about this compound (cas:89972-77-0).
Cyclodextrin cups were employed to build supramol. systems consisting of metal and organic photoactive/redox-active components; the photoinduced communication between redox-active units assembled in H2O via noncovalent interactions is established. The functionalization of a β-cyclodextrin with a terpyridine unit, ttp-β-CD, is achieved by protection of all but one of the hydroxyl groups by methylation and attachment of the ttp unit on the free primary hydroxyl group. The metalloreceptors [(β-CD-ttp)Ru(ttp)][PF6]2, [(β-CD-ttp)Ru(tpy)][PF6]2, and [Ru(β-CD-ttp)2][PF6]2 were synthesized and fully characterized. The [(β-CD-ttp)Ru(ttp)][PF6]2 metalloreceptor exhibits luminescence in H2O, centered at 640 nm, from the 3MLCT state with a lifetime of 1.9 ns and a quantum yield of Φ = 4.1 × 10-5. Addition of redox-active quinone guests AQS, AQC, and BQ to an aqueous solution of [(β-CD-ttp)Ru(ttp)]2+ results in quenching of the luminescence up to 40%, 20%, and 25%, resp. Measurement of the binding strength indicates that, in saturation conditions, 85% for AQS and 77% for AQC are bound. The luminescence quenching is attributed to an intercomponent electron transfer from the appended Ru center to the quinone guest inside the cavity. Control experiments demonstrate no bimol. quenching at these conditions. A photoactive Os metalloguest, [Os(biptpy)(tpy)][PF6], is designed with a biphenyl hydrophobic tail for insertion in the cyclodextrin cavity. The complex is luminescent at room temperature with an emission band maximum at 730 nm and a lifetime of 116 ns. The Os(III) species are formed for the study of photoinduced electron transfer upon their assembly with the Ru cyclodextrin, [(β-CD-ttp)Ru(ttp)]2+. Time-resolved spectroscopy studies show a short component of 10 ps, attributed to electron transfer from Ru(II) to Os(III) giving an electron transfer rate 9.5 × 109 s-1.
Different reactions of this compound(4-(p-Tolyl)-2,2:6,2-terpyridine)Name: 4-(p-Tolyl)-2,2:6,2-terpyridine require different conditions, so the reaction conditions are very important.
Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI