TY - JOUR
T1 - Adjusting the Coordination Configuration by Changing Electrostatic Potential
T2 - Introducing N/O/S Heteroatoms Based on the Electronic Effect
AU - Zhang, Chao
AU - Wang, Tingwei
AU - Li, Shaoqun
AU - Lu, Zujia
AU - Xu, Meiqi
AU - Li, Cong
AU - Yu, Qiyao
AU - Zhang, Jianguo
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024
Y1 - 2024
N2 - Energetic coordination compounds (ECCs) have demonstrated unique advantages in regulating the physicochemical properties of energetic materials through the design of organic ligands. The fundamental approach involves altering the electron cloud density distribution of organic ligands to modify the characteristics of coordination sites and, thus, achieve new coordination configurations. In this study, Mulliken charge distribution and surface electrostatic potential analysis were used to elucidate the effects of pyridinic N, pyrrolic N, oxazolic O, and thiazolic S on the electron cloud density of carbohydrazide groups through the induction effect and conjugate effect. Furthermore, three AgClO4-based ECCs were synthesized based on 1H-imidazole-4-carbohydrazide, oxazole-4-carbohydrazide, and thiazole-4-carbohydrazide. Single-crystal X-ray diffraction analysis revealed that [Ag(IZ-4-CA)ClO4]n has a one-dimensional (1D) chain structure, while Ag2(OZCA)2(ClO4)2 and Ag2(SZCA)2(ClO4)2 exhibit zero-dimensional structures. The 1D structure, with good planarity, results in [Ag(IZ-4-CA)ClO4]n having lower mechanical sensitivity (IS = 21 J, FS = 80 N). The introduction of oxazolic O enhances oxygen balance (OB), leading to a higher predicted detonation velocity and pressure for Ag2(OZCA)2(ClO4)2 (D = 6.4 km s-1, P = 23.6 GPa). Although the introduction of thiazolic S is unfavorable for improving oxygen balance, Ag2(SZCA)2(ClO4)2 exhibits the highest initial decomposition temperature among the three, at 232 °C. Additionally, initiation tests demonstrated that three ECCs can successfully detonate cyclotrimethylenetrinitramine (RDX), indicating good initiation capabilities.
AB - Energetic coordination compounds (ECCs) have demonstrated unique advantages in regulating the physicochemical properties of energetic materials through the design of organic ligands. The fundamental approach involves altering the electron cloud density distribution of organic ligands to modify the characteristics of coordination sites and, thus, achieve new coordination configurations. In this study, Mulliken charge distribution and surface electrostatic potential analysis were used to elucidate the effects of pyridinic N, pyrrolic N, oxazolic O, and thiazolic S on the electron cloud density of carbohydrazide groups through the induction effect and conjugate effect. Furthermore, three AgClO4-based ECCs were synthesized based on 1H-imidazole-4-carbohydrazide, oxazole-4-carbohydrazide, and thiazole-4-carbohydrazide. Single-crystal X-ray diffraction analysis revealed that [Ag(IZ-4-CA)ClO4]n has a one-dimensional (1D) chain structure, while Ag2(OZCA)2(ClO4)2 and Ag2(SZCA)2(ClO4)2 exhibit zero-dimensional structures. The 1D structure, with good planarity, results in [Ag(IZ-4-CA)ClO4]n having lower mechanical sensitivity (IS = 21 J, FS = 80 N). The introduction of oxazolic O enhances oxygen balance (OB), leading to a higher predicted detonation velocity and pressure for Ag2(OZCA)2(ClO4)2 (D = 6.4 km s-1, P = 23.6 GPa). Although the introduction of thiazolic S is unfavorable for improving oxygen balance, Ag2(SZCA)2(ClO4)2 exhibits the highest initial decomposition temperature among the three, at 232 °C. Additionally, initiation tests demonstrated that three ECCs can successfully detonate cyclotrimethylenetrinitramine (RDX), indicating good initiation capabilities.
UR - http://www.scopus.com/inward/record.url?scp=85209734660&partnerID=8YFLogxK
U2 - 10.1021/acs.joc.4c02287
DO - 10.1021/acs.joc.4c02287
M3 - Article
AN - SCOPUS:85209734660
SN - 0022-3263
JO - Journal of Organic Chemistry
JF - Journal of Organic Chemistry
ER -