The effect of malonic acid on the physico-chemical characterisation of 4-hydroxy pyridine: A new third order NLO single crystal was written by Subha, M.;Anitha, K.;Jauhar, ROMU.. And the article was included in Journal of Molecular Structure in 2019.HPLC of Formula: 626-64-2 This article mentions the following:
The proton transfer complex of 4-hydroxy pyridinium H malonate (4HPMA) single crystal was grown successfully by slow evaporation solution growth technique (SEST) at ambient temperature Cell parameters and crystal structure of 4HPMA were determined by single crystal x-ray diffraction (SCXRD) method. The UV-visible absorption spectrum reveals that 4HPMA grown crystal exhibits 70% optical transparency at 300-850 nm. Photoluminescence study suggests as-grown crystal has violet emission nature. FTIR and Raman spectral anal. were used to identify the presence of various functional groups. 1H and 13C NMR spectral analyses were used to identify the presence of proton and C. Thermal behavior of grown crystal was identified by Thermogravimetric (TGA) and Differential thermogravimetric analyses (DTA). Third-order nonlinear optical studies were evaluated with nonlinear refractive index (n2), nonlinear absorption coefficient (β) and 3rd-order nonlinear optical susceptibility χ(3) of the grown crystal. Hirshfeld surface analyses were used to predict the existence of all intermol. interactions. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2HPLC of Formula: 626-64-2).
Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.HPLC of Formula: 626-64-2