Purification of carbon nanotubes grown by thermal CVD
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Keywords:
Nitric acid
Camphor
Carbon fibers
Surface Modification
BET theory
Two novel disubstituted ferrocene, 1,1'-bis(3-pyridylethynyl)ferrocene 1 and 1,1'-bis(4-pyridylethynyl)ferrocene 2, were synthesized and fully characterized by elemental analysis, 1H NMR, 13C NMR, IR, and X-ray crystallography. Compound 1crystallizes in monoclinic, space group Cc, a=17.26Å, b=9.77Å, c=10.85Å, β=105.45; R1 =0.0399, wR2=0.1077, GooF=1.023. The two arms of the ferrocene are parallel, which will play an important role both in the coordination chemistry and electronic communication of the ferrocene.
Monoclinic crystal system
Proton NMR
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Abstract Mössbauer measurements were carried out over the range 80
Atmospheric temperature range
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Objective: To establish a method for determining camphor in compound camphor spirit by highperformance liquid chromatography( HPLC). Methods: HPLC( Agilent 1200) was performed on a Diamonsil C18 column with a mobile phase of methanol0. 2% phosphoric acid( 60: 40) at a flow rate of 1. 0 ml / min and a detection wavelength of 289 nm. Results: Camphor showed a good linear relationship between peak area and concentration within 0. 21. 6 mg / ml( R2 = 0. 9993),and the average recovery rate was 99. 39%. Conclusion: This HPLC method is accurate,simple,and repeatable and can be used for determination of camphor in compound camphor spirit.
Camphor
Phosphoric acid
Linear relationship
Recovery rate
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Impact sensitivity,friction sensitivity and thermal decomposition tests were applied to study the influence of different ferrocene derivatives on the sensitivities of ultra-fine AP/ferrocene mixtures.Experimental results showed that the ferrocene derivatives in this paper increase the impact and friction sensitivities of the ultra-fine AP/ferroceen mixtures.The impact sensitivities of the ultra-fine AP/ferrocene mixtures are not related to the Fe contents of ferrocene catalyst.However,the friction sensitivities of the ultra-fine AP/ferrocen mixtures are positively related to the Fe content of ferrocene catalyst.Some kinds of ferrocene catalysts,such as,SH-F-1,SH-F-2,SH-F-3,GFP and SH-F-5,present a new exothermic peak in DSC curve of ultra-fine AP/ferrocene mixture,show the greater thermal sensitivities.
Exothermic reaction
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Objective: To develop a method for determination of content of camphor in camphor cream. Methods:The content of camphor in camphor cream was determined by UV spectrophotometry .The detection wavelength was (289 ±1) nm. Results: There was a good linear relation between camphor content and Abs in the range of 1. 28 ~ 3. 84mg/mL. The average recovery was 101. 7% with RSD of 0.4%. Conclusion: The method is simple and accurate.
Camphor
Spectrophotometry
Linear relationship
Linear range
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Condensation reaction
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C60cocrystallises with ferrocene to give black C60(ferrocene)2, which contains discrete C60 and ferrocene molecules; the ferrocene does not reduce C60, but the structure appears to be stabilised as a result of weak intermolecular charge-transfer interactions.
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Objective To determine the contents of the camphor in Dongchuang Ointment by GC.Methods Camphor was determined by GC.Results It was showed that Camphor had a good linear relationship in the concentration range of 0.505 5~5.055 mg · mL-1 and the average recovery was up to 98.72% with RSD of 0.65%.Conclusion The methods could be effective for the quality control of Dongchuang ointment.
Camphor
Linear relationship
Linear range
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Abstract Ferrocene (I) reacts with 1‐adamantyl bromide (II) under Friedel‐Crafts conditions to give 1‐(1‐adamantyl)ferrocene (III) or after a prolonged reaction (III), together with 1,1'‐bis‐(1‐adamantyl)ferrocene (IV).
Friedel–Crafts reaction
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The paper has introduced the extracting and refining technology of camphor and camphor oil from trunks,stumps,branchs and leaves of camphor trees.some questions about extraction have also been pointed out.
Camphor
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