A new compound, [（NH2）2C=NH2]＋N（NO2）2-（GDN）, was prepared by mixing ammonium dinitramide （ADN） and guanidine hydrochloride in water. The thermal behavior of GDN was studied under the non-isothermal conditions...A new compound, [（NH2）2C=NH2]＋N（NO2）2-（GDN）, was prepared by mixing ammonium dinitramide （ADN） and guanidine hydrochloride in water. The thermal behavior of GDN was studied under the non-isothermal conditions with DSC and TG/DTG methods. The apparent activation energy（E） and pre-exponential constant（A） of the exothermic decomposition stage of GDN were 118.75 kJ/mol and 10^10.86 s^-1, respectively. The critical temperature of the thermal explosion（Tb） of GDN was 164.09 ℃. The specific heat capacity of GDN was determined with the Micro-DSC method and the theoretical calculation method, and the standard molar specific heat capacity was 234.76 J·mol^-1·K^-1 at 298.15 K. The adiabatic time-to-explosion of GDN was also calculated to be a certain value between 404.80 and 454.95 s.展开更多
Two complexes of α methacrylate copper(Ⅱ) with imidazole, Cu[CH 2C(CH 3)COO] 2· (imH) 2(1) and Cu 2[CH 2C(CH 3)COO] 4(imH) 2(2) were prepared and characterized. The single crystal X ray diffra...Two complexes of α methacrylate copper(Ⅱ) with imidazole, Cu[CH 2C(CH 3)COO] 2· (imH) 2(1) and Cu 2[CH 2C(CH 3)COO] 4(imH) 2(2) were prepared and characterized. The single crystal X ray diffraction study of complex 1 showed that the copper(Ⅱ) atom in the symmetric centre of the square planar environment was coordinated by two monodentate α methacrylate groups and two imidazole ligands that were in trans position with each other. Each molecular unit is linked with four neighbouring units by means of hydrogen bond interactions, forming a two dimensional supermolecular compound( d N…O =0 278 1 nm). Complex 1 crystallizes in monoclinic, space group P2 1/n with a =1 023 94(12) nm, b =0 842 94(8) nm, c =1 079 35(10) nm, β=117 231(7)°, Z =2. The forming mechanism of the complexes was discussed.展开更多
基金Supported by the National Natural Science Foundation of China(No.20803058)Xi’an Scientific and Technical Plan Foundation, China(No.YF07106).
文摘A new compound, [（NH2）2C=NH2]＋N（NO2）2-（GDN）, was prepared by mixing ammonium dinitramide （ADN） and guanidine hydrochloride in water. The thermal behavior of GDN was studied under the non-isothermal conditions with DSC and TG/DTG methods. The apparent activation energy（E） and pre-exponential constant（A） of the exothermic decomposition stage of GDN were 118.75 kJ/mol and 10^10.86 s^-1, respectively. The critical temperature of the thermal explosion（Tb） of GDN was 164.09 ℃. The specific heat capacity of GDN was determined with the Micro-DSC method and the theoretical calculation method, and the standard molar specific heat capacity was 234.76 J·mol^-1·K^-1 at 298.15 K. The adiabatic time-to-explosion of GDN was also calculated to be a certain value between 404.80 and 454.95 s.
文摘Two complexes of α methacrylate copper(Ⅱ) with imidazole, Cu[CH 2C(CH 3)COO] 2· (imH) 2(1) and Cu 2[CH 2C(CH 3)COO] 4(imH) 2(2) were prepared and characterized. The single crystal X ray diffraction study of complex 1 showed that the copper(Ⅱ) atom in the symmetric centre of the square planar environment was coordinated by two monodentate α methacrylate groups and two imidazole ligands that were in trans position with each other. Each molecular unit is linked with four neighbouring units by means of hydrogen bond interactions, forming a two dimensional supermolecular compound( d N…O =0 278 1 nm). Complex 1 crystallizes in monoclinic, space group P2 1/n with a =1 023 94(12) nm, b =0 842 94(8) nm, c =1 079 35(10) nm, β=117 231(7)°, Z =2. The forming mechanism of the complexes was discussed.
