1,1'-dihydro-5,5'-bistetrazole-lead coordination polymer and preparation method thereof

A technology of coordination polymer and bitetrazole, which is applied in the field of 1,1'-dihydro-5,5'-bitetrazole-lead coordination polymer and its preparation, can solve the problem of poor catalytic effect and carbon content high, does not meet the requirements of the development of smoke-free low characteristic signal propellants, and achieves the effects of reduced friction sensitivity, mild experimental conditions, and simple and easy preparation methods

Inactive Publication Date: 2016-03-30
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic effect of metals such as cobalt and silver in the coordination polymer is relatively poor.
Ligand 4,4'-azo-1,2,4-triazole has a high carbon content, which does not meet the development requirements of smokeless low characteristic signal propellants

Method used

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  • 1,1'-dihydro-5,5'-bistetrazole-lead coordination polymer and preparation method thereof
  • 1,1'-dihydro-5,5'-bistetrazole-lead coordination polymer and preparation method thereof
  • 1,1'-dihydro-5,5'-bistetrazole-lead coordination polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 0.14g (1mmol) of 1,1'-dihydro-5,5'-bitetrazol in 4ml of DMF / water (1:3) mixed solvent, and filter it into a 50ml beaker. 0.331g (1mmol) of lead nitrate was dissolved in 6ml of water and filtered into the same beaker. Heat to 80°C and hold for 10 hours. Then the temperature was lowered to 30°C at a rate of 3°C / hour. The resulting colorless crystals were collected by suction filtration and dried in the air. The yield was 40%.

Embodiment 2

[0018] Dissolve 0.14g (1mmol) of 1,1'-dihydro-5,5'-bitetrazol in 10ml of water, and filter it into a 20ml stainless steel reactor with Teflon liner. 0.331g (1mmol) of lead nitrate was dissolved in 10ml of water and filtered to the same reaction kettle. After the kettle body was sealed, the temperature was raised to 100° C. and maintained for 48 hours. Then the temperature was lowered to 30°C at a rate of 5°C / hour. The resulting colorless crystals were collected by suction filtration and dried in the air, with a yield of 42%.

Embodiment 3

[0020] Dissolve 0.14g (1mmol) of 1,1'-dihydro-5,5'-bitetrazol in 6ml of acetonitrile / water (1:2) mixed solvent, filter into 20ml of Teflon-lined Stainless steel reactor. 0.331g (1mmol) of lead nitrate was dissolved in 12ml of water and filtered to the same reaction kettle. After the kettle body was sealed, the temperature was raised to 130° C. and maintained for 48 hours. Then the temperature was lowered to 30°C at a rate of 6°C / hour. The resulting colorless crystals were collected by suction filtration and dried in the air, with a yield of 41%.

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Abstract

The invention discloses a coordination polymer and a preparation method thereof. A unit cell of the coordination polymer contains a 1,1'-dihydro-5,5'-bistetrazole ligand, a lead (II) ion and three coordinated water molecules. The preparation method comprises the following steps: dissolving 1,1'-dihydro-5,5'-bistetrazole and lead salt in a solvent, filtering the solution, heating the solid to 60-160 DEG C, maintaining the temperature for 2-48 hours, reducing the temperature to 10-40 DEG C at a rate of 1-10 DEG C per hour, precipitating a colorless crystal and carrying out suction filtration and airing, thus obtaining the coordination polymer. The prepared coordination polymer has higher nitrogen content and can serve as a single-compound explosive or solid propellant burning rate modifier.

Description

technical field [0001] The invention belongs to the field of energetic materials, and in particular relates to a 1,1'-dihydro-5,5'-bitetrazolium-lead coordination polymer and a preparation method thereof. Background technique [0002] Energetic combustion catalysts are generally energetic metal salts or complexes prepared from ligands with energetic groups such as nitro or azido groups or ligands with high nitrogen content. Metal salts and complexes of triazoles or tetrazoles are the most widely studied and applied energetic combustion catalysts. However, the energy of these organometallic salts or complexes is low, and 5-amino-1,2,4-triazole AT and 3-nitro-1,2,4-triazol-5-one NTO metal salts are sensitive to the presence of high question. [0003] In recent years, promising results have been achieved for energetic materials prepared from coordination polymers. Professor Chen Sanping from Northwest University used cobalt nitrate and 5-(4-hydrogen-1,2,4-triazolyl)-1-hydro-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/24C06D5/00
Inventor 郭兆琦蔚红建伍致生李继超郭旺军张杰高潮安忠维
Owner XIAN MODERN CHEM RES INST
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