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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (5): 420-424. 上一篇    下一篇

研究论文

2,4-二硝基咪唑铅配合物Pb(DNI)2(H2O)4的热分解

张 伟* 樊学忠 刘子如 李吉祯 任晓宁
陈智群 王晓红

  

  1. (西安近代化学研究所 西安 710065)

  • 投稿日期:2008-08-04 修回日期:2008-10-25 发布日期:2009-03-14
  • 通讯作者: 张伟

Thermal Decomposition of Lead(II) Salt of 2,4-Dinitroimidazole

Zhang, Wei* Fan, Xuezhong Liu, Ziru Li, Jizhen Ren, Xiaoning
Chen, Zhiqun Wang, Xiaohong
  

  1. (Xi’an Modern Chemistry Research Institute, P.O. Box 18, Xi’an 710065)
  • Received:2008-08-04 Revised:2008-10-25 Published:2009-03-14
  • Contact: Zhang, Wei

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1383

被引次数

13 | 5

应用TG, TG-DSC-FTIR-MS联用技术和热裂解原位RSFT-IR技术研究了2,4-二硝基咪唑铅(PDNI)的热分解机理. 结果表明, PDNI在102 ℃附近脱除分子内配位水, 生成Pb(DNI)2; 在284 ℃附近C—NO2断裂, 生成NO2, 咪唑环开环, 伴随发生强烈的氧化放热反应, 生成CO2, N2O和铅盐与咪唑残余基团形成的复杂混合物或多聚烃类化合物; 在300～400 ℃范围内, PDNI继续缓慢分解, 生成CO2, N2O和Pb[NCO]2; 升温至410 ℃以上, PDNI分解生成CO和Pb[CN]2.

关键词: 2,4-二硝基咪唑铅, 热分解, TG, DSC, MS, FTIR

The mechanism of thermal decomposition of the lead(II) salt of 2,4-dinitroimidazole (PDNI) was studied by means of TG, simultaneous TG-DSC-FTIR-MS and thermolysis in situ rapid-scan FTIR. The results indicate that the coordinated H2O is firstly escaped from PDNI molecules at the temperature of approximately 102 ℃; NO2 is produced as C—NO2 bond is broken, the imidazole ring is ruptured with simultaneous strong exothermic process at the temperature of approximately 289 ℃, the gaseous and condensed products of PDNI consist of CO2, N2O, NO2 and complex mixtures of lead(II) salt of poly unsaturated hydrocarbon from imidazole residual; CO2, N2O and Pb[NCO]2 are produced as PDNI continuously slowly decomposes in the temperature range of 300 to 400 ℃; CO and Pb[CN]2 are finally produced as temperature increases to higher than 410 ℃.

Key words: lead(II) salt of 2,4-dinitroimidazole, thermal decomposition, TG, DSC, MS, FTIR