TY - JOUR
T1 - Eco-friendly Trifoliate Stable Energetic Zinc Nitrate Coordination Compounds
T2 - Synthesis, Structures, Thermal and Explosive Properties
AU - Tong, Wen Chao
AU - Liu, Jian Chao
AU - Wang, Qian You
AU - Yang, Li
AU - Zhang, Tong Lai
N1 - Publisher Copyright:
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2014/11
Y1 - 2014/11
N2 - Three trifoliate environmental friendly coordination compounds, [Zn(SCZ)3](NO3)2 (1) (SCZ = semicarbazide), [Zn(CHZ)3](NO3)2 (2) (CHZ = carbohydrazide), and [Zn(MCZ)3](NO3)2 ·H2O (3) (MCZ = methyl carbazate), were synthesized by the reaction of zinc nitrate with its corresponding ligands. The products were characterized by elemental analysis and FT-IR spectroscopy. Furthermore, compound 1 and 2 were characterized by X-ray single crystal diffraction. The crystal structures of both 1 and 2 belong to the monoclinic P21/c space group. Remarkably, in all the three compounds, the central zinc cations are six-coordinated with three oxygen atoms of carbonyl groups and three terminal nitrogen atoms of the hydrazine groups from three SCZ / CHZ / MCZ molecules, which can form three five-member (Zn-O-C-N-N) rings and exhibit a distorted octahedron. Thermal stabilities of 1 to 3 were studied by differential scanning calorimetry (DSC) and showed that they are all thermostable. The non-isothermal kinetics parameters were calculated by the Kissinger's method and Ozawa's method, respectively. The energies of combustion, enthalpies of formation, critical temperature of thermal explosion, entropies of activation (ΔS≠), enthalpies of activation (ΔH≠), and free energies of activation (ΔG≠) were measured and calculated. Sensitivity tests revealed that 1-3 are insensitive to mechanical stimuli. The studies of all these three zinc compounds showed that they have potential applications as heat-stable insensitive energetic materials, especially the semicarbazide coordination compound 1, which has higher crystal density.
AB - Three trifoliate environmental friendly coordination compounds, [Zn(SCZ)3](NO3)2 (1) (SCZ = semicarbazide), [Zn(CHZ)3](NO3)2 (2) (CHZ = carbohydrazide), and [Zn(MCZ)3](NO3)2 ·H2O (3) (MCZ = methyl carbazate), were synthesized by the reaction of zinc nitrate with its corresponding ligands. The products were characterized by elemental analysis and FT-IR spectroscopy. Furthermore, compound 1 and 2 were characterized by X-ray single crystal diffraction. The crystal structures of both 1 and 2 belong to the monoclinic P21/c space group. Remarkably, in all the three compounds, the central zinc cations are six-coordinated with three oxygen atoms of carbonyl groups and three terminal nitrogen atoms of the hydrazine groups from three SCZ / CHZ / MCZ molecules, which can form three five-member (Zn-O-C-N-N) rings and exhibit a distorted octahedron. Thermal stabilities of 1 to 3 were studied by differential scanning calorimetry (DSC) and showed that they are all thermostable. The non-isothermal kinetics parameters were calculated by the Kissinger's method and Ozawa's method, respectively. The energies of combustion, enthalpies of formation, critical temperature of thermal explosion, entropies of activation (ΔS≠), enthalpies of activation (ΔH≠), and free energies of activation (ΔG≠) were measured and calculated. Sensitivity tests revealed that 1-3 are insensitive to mechanical stimuli. The studies of all these three zinc compounds showed that they have potential applications as heat-stable insensitive energetic materials, especially the semicarbazide coordination compound 1, which has higher crystal density.
KW - Crystal structure
KW - Explosive properties
KW - Nitrate
KW - Thermal analysis
KW - Zinc
UR - https://www.scopus.com/pages/publications/84941053286
U2 - 10.1002/zaac.201400292
DO - 10.1002/zaac.201400292
M3 - Article
AN - SCOPUS:84941053286
SN - 0044-2313
VL - 640
SP - 2991
EP - 2997
JO - Zeitschrift fur Anorganische und Allgemeine Chemie
JF - Zeitschrift fur Anorganische und Allgemeine Chemie
IS - 14
ER -