Synthesis of 5,5′-azoxybistetrazole via nitration and de-oxygen rearrangement of triazene

Qi Wang; Tian Lu; Chenbin Wang; Guijuan Fan; Hongquan Yin; Fu-Xue Chen

doi:10.1039/c7nj02724a

Synthesis of 5,5′-azoxybistetrazole via nitration and de-oxygen rearrangement of triazene

New Journal of Chemistry ◽

10.1039/c7nj02724a ◽

2017 ◽

Vol 41 (20) ◽

pp. 11512-11516 ◽

Cited By ~ 2

Author(s):

Qi Wang ◽

Tian Lu ◽

Chenbin Wang ◽

Guijuan Fan ◽

Hongquan Yin ◽

...

Keyword(s):

Nitric Acid ◽

Sequential Treatment ◽

Unusual Transformation ◽

Fuming Nitric Acid

An unusual transformation of tetrazole triazene into 5,5′-azoxybistetrazole by a sequential treatment with fuming nitric acid and acetyl anhydride.

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Gallium Arsenide Integrated Circuits Decapsulation Technique Using Mixed Acid Chemistry For Die-Level Failure Analysis

10.31399/asm.cp.istfa2018p0496 ◽

2018 ◽

Author(s):

Harold Jeffrey M. Consigo ◽

Ricardo S. Calanog ◽

Melissa O. Caseria

Keyword(s):

Gallium Arsenide ◽

Sulfuric Acid ◽

Nitric Acid ◽

Integrated Circuits ◽

Failure Analysis ◽

Mixed Acid ◽

Optimum Parameters ◽

Plastic Package ◽

Fuming Nitric Acid ◽

Concentrated Sulfuric Acid

Abstract Gallium Arsenide (GaAs) integrated circuits have become popular these days with superior speed/power products that permit the development of systems that otherwise would have made it impossible or impractical to construct using silicon semiconductors. However, failure analysis remains to be very challenging as GaAs material is easily dissolved when it is reacted with fuming nitric acid used during standard decapsulation process. By utilizing enhanced chemical decapsulation technique with mixture of fuming nitric acid and concentrated sulfuric acid at a low temperature backed with statistical analysis, successful plastic package decapsulation happens to be reproducible mainly for die level failure analysis purposes. The paper aims to develop a chemical decapsulation process with optimum parameters needed to successfully decapsulate plastic molded GaAs integrated circuits for die level failure analysis.

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Synthesis and properties of 1,3-bis(4-nitrophenyl)-1-butene

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19802120 ◽

1980 ◽

Vol 45 (7) ◽

pp. 2120-2124 ◽

Cited By ~ 1

Author(s):

Gabriel Čík ◽

Anton Blažej ◽

Kamil Antoš ◽

Igor Hrušovský

Keyword(s):

Acetic Acid ◽

Nitric Acid ◽

Double Bond ◽

Fuming Nitric Acid

1,3-Bis(4-nitrophenyl)-1-butene was prepared by nitration of 1,3-diphenyl-1-butene (I) with fuming nitric acid in acetic acid. The double bond in I was protected by addition of bromine which was eliminated after the nitration. The UV, IR and 1H- spectra of the synthesized compounds are interpreted.

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Nanocarbon from Rocket Fuel Waste: The Case of Furfuryl Alcohol-Fuming Nitric Acid Hypergolic Pair

Nanomaterials ◽

10.3390/nano11010001 ◽

2020 ◽

Vol 11 (1) ◽

pp. 1

Author(s):

Nikolaos Chalmpes ◽

Athanasios B. Bourlinos ◽

Smita Talande ◽

Aristides Bakandritsos ◽

Dimitrios Moschovas ◽

...

Keyword(s):

Nitric Acid ◽

Furfuryl Alcohol ◽

Materials Science ◽

Ambient Conditions ◽

Materials Synthesis ◽

Rocket Fuel ◽

Carbon Nanosheets ◽

New Synthesis ◽

Fuming Nitric Acid ◽

Liquid Rocket

In hypergolics two substances ignite spontaneously upon contact without external aid. Although the concept mostly applies to rocket fuels and propellants, it is only recently that hypergolics has been recognized from our group as a radically new methodology towards carbon materials synthesis. Comparatively to other preparative methods, hypergolics allows the rapid and spontaneous formation of carbon at ambient conditions in an exothermic manner (e.g., the method releases both carbon and energy at room temperature and atmospheric pressure). In an effort to further build upon the idea of hypergolic synthesis, herein we exploit a classic liquid rocket bipropellant composed of furfuryl alcohol and fuming nitric acid to prepare carbon nanosheets by simply mixing the two reagents at ambient conditions. Furfuryl alcohol served as the carbon source while fuming nitric acid as a strong oxidizer. On ignition the temperature is raised high enough to induce carbonization in a sort of in-situ pyrolytic process. Simultaneously, the released energy was directly converted into useful work, such as heating a liquid to boiling or placing Crookes radiometer into motion. Apart from its value as a new synthesis approach in materials science, carbon from rocket fuel additionally provides a practical way in processing rocket fuel waste or disposed rocket fuels.

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