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.Xiang, Xian-Ming; Qian, Dong-Jin; Li, Fu-You; Chen, Hai-Tao; Liu, Hong-Guo; Huang, Wei; Feng, Xu-Sheng researched the compound: 4-(p-Tolyl)-2,2:6,2-terpyridine( cas:89972-77-0 ).Synthetic Route of C22H17N3.They published the article 《Fabrication of europium complexes with 4′-(4-methylphenyl)-2,2′:6′,2”-terpyridine and 4,4′-dinonyl-2,2′-dipyridyl at the air-water interface and their emission properties in Langmuir-Blodgett films》 about this compound( cas:89972-77-0 ) in Colloids and Surfaces, A: Physicochemical and Engineering Aspects. Keywords: europium complex methylphenyl terpyridine Langmuir Blodgett film fluorescence; dinonyl dipyridyl europium complex Langmuir Blodgett film fluorescence. We’ll tell you more about this compound (cas:89972-77-0).
Ternary Eu complexes were formed at the air-H2O interface mediated by monolayers of 4,4′-dinonyl-2,2′-dipyridyl (DNDPy) and 4′-(4-methylphenyl)-2,2′:6′,2”-terpyridine (MPTPy). A saturated Eu(TTA)3 (TTA: theonyltrifluoroacetone) aqueous solution was used as subphase, on the surface of which condensed DNDPy and MPTPy monolayers could be stabilized. The DNDPy-/MPTPy-Eu(TTA)3 layers were transferred onto either hydrophobic or hydrophilic substrate surfaces by Langmuir-Blodgett (LB) method. Fluorescence spectra showed several sharp peaks corresponding to Eu3+ emissions from 5D1 → 7F1 (535 nm) and 5D0 → 7F0,1,2,3 (580, 595, 612 and 650 nm). A relative stronger emission from 5D1 → 7F1 to that from 5D0 → 7F2 was recorded for the LB films of DNDPy-Eu(TTA)3 complex. Compared with that in solution, longer fluorescence lifetime was observed for the complexes in the LB films.
In addition to the literature in the link below, there is a lot of literature about this compound(4-(p-Tolyl)-2,2:6,2-terpyridine)Synthetic Route of C22H17N3, illustrating the importance and wide applicability of this compound(89972-77-0).
Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI