Novel organic NLO material bis(N-phenylbiguanidium(1+)) oxalate – A combined X-ray diffraction, DSC and vibrational spectroscopic study of its unique polymorphism
作者:Irena Matulková、Ivana Císařová、Přemysl Vaněk、Petr Němec、Ivan Němec
DOI:10.1016/j.saa.2016.07.023
日期:2017.1
Z = 4, R = 0.0420 for 2396 observed reflections). The cooling of the centrosymmetric phase (II) leads to the formation of bis(N-phenylbiguanidium(1+)) oxalate (III) (a = 6.1083(2) Å, b = 11.3178(5) Å, c = 14.9947(5) Å, β = 93.151(2)°, V = 1035.05(8) Å3, Z = 4, R = 0.0345 for 2367 observed reflections and a temperature of 110 K), which also belongs to the monoclinic space group P21/n. The crystal structures
报道了草酸双(N-苯基双胍(1+))的三个多态性修饰,并讨论了它们的表征。从313 K水溶液获得的非中心对称双(N-苯基双胍(1+))草酸酯(I)属于单斜空间群Cc(a = 6.2560(2)Å,b = 18.6920( 3)埃,c ^ = 18.2980(5),β = 96.249(1)°,V = 2127.0(1)埃3,ž = 4,- [R = 0.0314为4738米观察到的反射)。中心对称bis(N草酸-苯基双胍(1+)草酸酯(II)是从298 K的水溶液中获得的,属于单斜晶空间群P 2 1 / n(a = 6.1335(3)Å,b = 11.7862(6)Å,c = 14.5962(8)埃,β = 95.728(2)°,V = 1049.90(9)埃3,ž = 4,- [R = 0.0420为2396观察到的反射)。中心对称相(II)的冷却导致生成草酸