Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Solid State Chemistry called A series of lanthanide complexes with 2-fluorobenzoic acid and 5,5′-dimethyl-2,2′-bipyridine: Synthesis, supramolecular structures, spectroscopy and thermal behaviour, Author is Du, Dan-Dan; Ren, Ning; Zhang, Jian-Jun, which mentions a compound: 1762-34-1, SMILESS is CC1=CN=C(C=C1)C1=NC=C(C)C=C1, Molecular C12H12N2, Name: 5,5′-Dimethyl-2,2′-bipyridine.
A family of lanthanide-based self-assembling complexes constructed from 2-fluorobenzoic acid and 5,5′-dimethyl-2,2′-bipyridine have been successfully fabricated via conventional synthesis, namely, [Ln(2-FBA)3(5,5′-DM-2,2′-bipy)]2 (2-FBA = 2-fluorobenzoate, 5,5′-DM-2,2′-bipy = 5,5′-dimethyl-2,2′-bipyridine, Ln = La (1), Pr (2), Nd (3), Sm (4), Gd (5), Dy (6), Ho (7), Er (8)). The obtained complexes are investigated by elemental anal., IR spectra, Raman spectra and single-crystal x-ray diffraction. Crystallog. results exhibit that each Ln3+ ion of them is located in a distorted Muffin coordination sphere finished by seven oxygen atoms of 2-FBA ligands and two nitrogen atoms of 5,5′-DM-2,2′-bipy ligand. Interestingly, although complexes 1-6 and 7-8 have the same formula unit, the differences in hydrogen bond interactions lead to different supramol. structures. Besides, the thermal decomposition mechanism of the complexes has been studied by TG/DSC-FTIR technol. The results show that these complexes are thermally stable up to 450 K. In addition, complexes 4 and 6 both exhibit the characteristic fluorescence of lanthanide ions, i.e., complex 4 exhibits characteristic 4G5/2→6HJ/2 (J = 5, 7, 9) transitions, and complex 6 shows characteristic 4F9/2→6HJ/2 (J = 15, 13) transitions.
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