Synthesis of Ligand para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazol-5-yl) benzene by Aldol Condensation Method

Yulian Syahputri (Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Pakuan)
Sutanto Sutanto (Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Pakuan)
Linda Jati Kusumawardani (Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Pakuan)

Helium: Journal of Science and Applied Chemistry
Vol 1, No 1 (2021): Helium: Journal of Science and Applied Chemistry

Synthesis of pyrazoline derivative ligand para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazol-5-yl)benzene has been successfully carried out by aldol condensation method using 2-acetyl pyridine and terephthalaldehyde in ethanol solution. The synthesis results are then reacted with excess phenyl hydrazine. The yield of ligand obtainedwas 63.10% of ayellow solid. The ligand was characterized using 1H-NMR spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, fourier transform infra-red (FTIR) spectroscopy and spectrofluorometer. The characterization with UV-Vis spectrophotometer results shows ligand has a large value of molar absorptivity (ε) at wavelength 236 nm and concentration 5x10-5 M.The results indicates that the ligand has a strong fluorescence intensity. It proved by peak emission at 467.5 nm (I = 4055 a.u).