In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Spectroscopic and electrochemical recognition of H2PO-4 based on a ruthenium complex with 2-picolinamide, published in 2021-01-01, which mentions a compound: 1452-77-3, Name is Picolinamide, Molecular C6H6N2O, Product Details of 1452-77-3.
A ruthenium polypyridyl complex 4(PF6) with 2-picolinamide as an anionic NN̂ bidentate ligand is synthesized and characterized, including single-crystal X-ray anal. As an effective anion receptor in CH2Cl2, complex 4(PF6) shows selective spectroscopic and electrochem. recognition towards H2PO-4 over other anions tested (F-, Cl-, Br-, I-, HP2O3-7, HSO-4, AcO- and NO-3). Job’s plot and mass spectral analyses support that an adduct is formed between 4 and H2PO-4 with a 1:2 binding stoichiometry. The absorption spectral titration of 4(PF6) with H2PO-4 yields a global association constant in the order of 108 L2·mol-2 and an optical detection limit of 1.4 x 10-6 mol·L-1. In response to the presence of H2PO-4, the Ru(II/III) redox couple of 4(PF6) displays a “”two-wave behavior”” accompanied by a large neg. shift from +0.74 to +0.45 V vs Ag/AgCl. 1H NMR spectral titration analyses suggest that effective hydrogen-bonding interactions are present between 4 and H2PO-4, which are believed responsible for the observed spectroscopic and electrochem. response of 4(PF6) toward H2PO-4.
As far as I know, this compound(1452-77-3)Product Details of 1452-77-3 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.
Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem