TY - JOUR
T1 - Thermal decomposition of 4-amino-1,2,4-triazolium nitrate under infrared laser heating
AU - Li, Jianquan
AU - Litzinger, Thomas A.
N1 - Funding Information:
This work is supported by the U.S. Air Force Office of Scientific Research under Contract No. F49620-03-1-0211, with Dr. Michael Berman serving as the program manager. The authors wish to thank Drs. Hawkins and Drake of Edwards AFB for providing the 4-ATAN material.
PY - 2007/3/15
Y1 - 2007/3/15
N2 - The objective of this work is to study the behavior of an ionic liquid, 1-H-4-amino-1,2,4-triazolium nitrate, during thermal decomposition driven by an infrared laser (10.6 μm). The focus was to understand the initial decomposition reactions and subsequent reactions that lead to ring decomposition and eventually to ignition. A triple quadrupole mass spectrometer with molecular beam sampling was used to obtain gaseous decomposition species of the sample. The principal mass peaks that may contain multiple masses were analyzed through tandem mass techniques. The experiments were conducted at a laser heat flux of 100 W/cm2 in helium at 1 atm. To assist in interpreting the data, three other materials were also tested, 4-amino-1,2,4-triazolium hydrochloride, 4-amino-1,2,4-triazole, and 1-H-1,2,4-triazole. The results show that the most probable route to initiate the decomposition of the 1-H-4-amino-1,2,4-triazolium nitrate is through proton transfer from N1 site to the nitrate forming a neutral pair, nitric acid and amino-triazole. Subsequent reactions involve decomposition of the neutral pair and their interactions.
AB - The objective of this work is to study the behavior of an ionic liquid, 1-H-4-amino-1,2,4-triazolium nitrate, during thermal decomposition driven by an infrared laser (10.6 μm). The focus was to understand the initial decomposition reactions and subsequent reactions that lead to ring decomposition and eventually to ignition. A triple quadrupole mass spectrometer with molecular beam sampling was used to obtain gaseous decomposition species of the sample. The principal mass peaks that may contain multiple masses were analyzed through tandem mass techniques. The experiments were conducted at a laser heat flux of 100 W/cm2 in helium at 1 atm. To assist in interpreting the data, three other materials were also tested, 4-amino-1,2,4-triazolium hydrochloride, 4-amino-1,2,4-triazole, and 1-H-1,2,4-triazole. The results show that the most probable route to initiate the decomposition of the 1-H-4-amino-1,2,4-triazolium nitrate is through proton transfer from N1 site to the nitrate forming a neutral pair, nitric acid and amino-triazole. Subsequent reactions involve decomposition of the neutral pair and their interactions.
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U2 - 10.1016/j.tca.2007.01.013
DO - 10.1016/j.tca.2007.01.013
M3 - Article
AN - SCOPUS:33847112861
SN - 0040-6031
VL - 454
SP - 116
EP - 127
JO - Thermochimica Acta
JF - Thermochimica Acta
IS - 2
ER -