Reinvestigating the synthesis and properties of high energetic MOFs based on 5,5′-bistetrazole-1,1′-diolate (BTO2−) and some transition metal cations (Pb2+, Cu2+ and Ag+)

• Published in: Inorganica Chimica Acta Vol. 553; p. 121520
• Main Authors: Fakhraian, Hossein, Nassimi, Akbar, Javadi, Nabi
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2023
• Subjects: Friction sensibility; H2BTO; High explosive; Hydrothermal; Impact sensitivity; Insensitive; MOF; Insensitive; MOF; High explosive; Friction sensibility; Impact sensitivity; H2BTO; Hydrothermal
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2023.121520

[Display omitted] •The synthesis of H2BTO from glyoxal following a four steps method has been detailed (with an overall yield form glyoxal 68%).•MOFs based on this ligand and Pb2+, Cu2+, and Ag+ have been prepared via hydrothermal method using cylindrical glass pressure vessel.•The results of ACP-AES analysis were conform to the structure of MOFs as [Pb(BTO)(H2O)2]n, [Cu(BTO)(H2O)2]n and [Ag(HBTO)]n.•MOF based on BTO2− and Cu2+ showing the density of 2.44 g/cm3, detonation temperature of 280–285 °C, impact sensitivity of 6.7 J and friction sensitivity of >360 N seem to be interesting as high energetic insensitive MOF.•Two other MOFs ([Pb(BTO)(H2O)2]n and [Ag(HBTO)]n) despite high density and appropriate thermal stability (ρ = 3.73 and 3.86 g/cm3 and TDet (or TDec) of 310–315 and 320–325 °C respectively) are more sensitive toward the impact and friction compared to H2BTO. 5,5′-Bistetrazole-1,1′-diole (H2BTO), as a high energetic compound, is the precursor for the synthesis of insensitive high explosive (TKX-50, ABTOX and …). It is also considered as an attracting high nitrogen content ligand to prepare high energetic MOFs. Herein, H2BTO has been synthesized following a four steps method from glyoxal with an overall yield of 68%. Then, MOFs based on this ligand and Pb2+, Cu2+, and Ag+ have been prepared via hydrothermal method in a cylindrical glass pressure vessel at 130 °C. ICP-AES analysis confirms the composition of the produced MOFs as [Pb(BTO)(H2O)2]n, [Cu(BTO)(H2O)2]n and [Ag(HBTO)]n that, compared to the ligand precursor (H2BTO), are more dense and thermal stable but are more sensitive toward impact. Among these three MOFs, [Cu(BTO)(H2O)2]n present promising sensitivity properties (friction sensitivity >360 N and impact sensitivity of 28 J).