Identification and formation mechanism of the transient ion fragments produced in laser-induced dissociation of 1, 1-diamino-2, 2-dinitroethylene. (6th September 2018)

• Record Type: Journal Article
• Authors: Zhang, Wei; Bao, Lirong; Jiang, Kexin; Shi, Anran; Shen, Ruiqi; Ye, Yinghua
• Is Part Of: Laser and particle beams. Volume 36:Number 3(2018)
• Page Start: 308
• Page End: 312
• Publication Date: 2018-09-06
• Subjects: dissociation mechanism, -- FOX-7, -- TOFMS, -- ion fragments, -- laser dissociation; Laser beams -- Periodicals; Particle beams -- Periodicals; 535.5
• DOI: 10.1017/S0263034618000290
• Languages: English
• ISSNs: 0263-0346

Abstract

Abstract: Detailed knowledge of dissociation behavior and dissociation products is necessary to understand the stability, sensitivity, and the reactive mechanism of explosives under laser initiation. A time-of-flight mass spectrometer was utilized to detect the transient products of 1, 1-diamino-2, 2-dinitroethylene (FOX-7) produced under 532 nm pulse laser ablation, the possible attribution of intermediate ion fragments were confirmed. The laser fluence threshold for detectable fragments is about 3.6 J/cm 2 . The peak intensities of main ions (CN, CNO/C2 H4 N, NO2, C2 N2 O, HCN, C2 NH2, etc.) increase with the increasing of laser fluence, and reach the maximum at 11.5 J/cm 2 . Moreover, time-depend changes of ion intensity indicate that the type and degree of reactions are different in different periods. According to the molecular structure of FOX-7 and the intermediate ions, the laser-induced dissociation mechanisms were proposed to illustrate the cause of the fragments which might throw some light on the laser initiation of FOX-7.