Crystal Growth of a Promising Nonlinear Optical Material: 2-Amino-5-Nitropyridinium Chloride

X-ray characterization of an organic–inorganic solution grown crystal: case of 2-amino-5-nitropyridinium chloride

“…By comparison with the crystalline quality presented in the Ref. [14], it is verified that the misoriented zone around the seed is reduced in this study.…”

“…The solubility of 2A5NPCl was measured at different temperatures, for HCl concentrations varying from 0.08 to 7.2 M [14]. In fact, for large HCl concentrations, ionization is not complete so that the slope of the solubility curve as a function of temperature decreases with the increase of HCl concentration, allowing to regulate the growth rate.…”

“…Among the family of 2A5NP + salts, 2A5NPCl crystal exhibits a large quadratic nonlinear optical coefficient: d eff ¼ 9:7 pm/V at 1.32 mm [13]. Since the lower limit of the cut-off wavelength (determined at 50% of the transmittance) is 410 nm [14], 2A5NPCl crystal is convenient to generate a blue laser beam by wavelength conversion.…”

“…Crystal growth of 2A5NPCl was achieved by temperature lowering technique [14], which leads to a few cm 3 crystals. Their crystalline quality was examined by X-ray Lang topography [13].…”

Semiorganic NLO material for short-wavelength generation 2-amino-5-nitropyridinium bromide

“…The donor and acceptor groups are linked through conjugated rings, such as benzene or pyridine, that are most often used. Among the various organic molecules, 2-amino-5-nitropyridine (2A5NP) allows for the growth of numerous salts, like 2-amino-5-nitropyridinium chloride (2A5NPCl), 2-amino-5-nitropyridinium bromide (2A5NPBr), 2A5NP dihydrogen phosphate, dihydrogen arsenate and tartrate [6][7][8][9], etc. The 2A5NPBr salt has a high nonlinear optical efficiency, which is close to that of 2-methyl-2, 4-dinitrophenyl amino propanate (d 22 ¼ 29:3 pm=V) (MAP) [10,11].…”