In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Terpyridine Zn(II), Ru(III), and Ir(III) Complexes: The Relevant Role of the Nature of the Metal Ion and of the Ancillary Ligands on the Second-Order Nonlinear Response of Terpyridines Carrying Electron Donor or Electron Acceptor Groups, published in 2005-11-28, which mentions a compound: 89972-77-0, mainly applied to transition metal terpyridine complex preparation NLO; terpyridine derivative preparation complexation transition metal hyperpolarizability; geometry optical aminphenylterpyridine, Related Products of 89972-77-0.
Coordination of 4′-(C6H4-p-X)-2,2′:6′,2”-terpyridines [X = NO2, NBu2, (E)-CH:CHC6H4-p-NBu2, (E,E)-(CH:CH)2C6H4-p-NMe2] to Zn(II), Ru(III), and Ir(III) metal centers induces a significant enhancement of the absolute value of the 2nd-order nonlinear optical (NLO) response of the terpyridine, measured by both elec. field induced 2nd harmonic generation and solvatochromic methods. By varying the nature of the metal center, the enhanced 2nd-order NLO response shifts from pos. to neg. Such a shift is controlled by electronic charge-transfer transitions, such as metal-to-ligand or ligand-to-metal transitions, in addition to the intraligand charge transfer. The enhancement generated by coordination is also controlled by the chelation effect and by fine-tuning of the ancillary ligands.
Although many compounds look similar to this compound(89972-77-0)Related Products of 89972-77-0, numerous studies have shown that this compound(SMILES:CC1=CC=C(C2=CC(C3=NC=CC=C3)=NC(C4=NC=CC=C4)=C2)C=C1), has unique advantages. If you want to know more about similar compounds, you can read my other articles.
Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI