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Synthesis and Surface Active Properties of cyanuric Chloride-based Branched Surfactant

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China Detergent & Cosmetics 2019年第2期4卷 52-57页

作者： Lv Jinge Lu Chunbin Yuan Cuili Han Jianwei Wang Limin Shanghai Key Laboratory of Functional Materials Chemistry and Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology

A series of novel branched sodium carboxylate surfactants were synthesized from cyanuric chloride, behera amine, alcohol amine and 1,4-Bis (3-aminopropyl) piperazine through seven steps, and the total yield is about 25%. The chemical structures of target products were confirmed by 1H NMR, 13C NMR, FT-IR and ESI-MS. Their critical micelle concentrations (CMC) were also determined by surface tension tests in the aqueous solutions at 22 ℃. The results showed that the CMC value of multi-carboxylate anionic surfactants decreased with the increase of hydroxyl. Additionally, the branched structure of end group can reduce surface tension more than straight-chain type, which was determined by γCMC. The decomposition temperature of the target compound was 250 ℃, which was also tested by TG/DTA curve.

关键词： cyanuric chloride surfactant branched compounds surface tension

Biodegradation of Melamine and cyanuric Acid by a Newly-Isolated <i>Microbacterium</i>Strain

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Advances in Microbiology 2012年第3期2卷 303-309页

作者： Naofumi Shiomi Maiko Ako School of Human Sciences Kobe College Nishinomiya Japan

We searched for a superior melamine-degrading bacterium for the bioremediation of melamine. cyanuric acid, which is a by-product produced during the biodegradation of melamine, shows strong nephrotoxicity. Therefore, the melamine-degrading bacterium is also required to show a high ability to degrade cyanuric acid. We selected a melamine-degrading strain (MEL1) among ten cyanuric acid-degrading bacteria isolated from the soil. The species of MEL1 strain was Microbacterium esteramaticum or was extremely similar to that species, and the enzymatic activity of the melamine deaminase in the MEL1 strain was similar to that in the NRRLB-12227 strain. The ability of the MEL1 strain to degrade cyanuric acid was higher than its ability to degrade melamine, and therefore, the accumulation of by-products (ammeline, ammelide and cyanuric acid) during the degradation of melamine was minimal. These results suggest that the MEL1 strain is useful for the bioremediation of melamine.

关键词： Melamine cyanuric Acid Melamine Deaminase Microbacterium

Synthesis of a Fluorophore with Improved Optical Brightness

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International Journal of Organic Chemistry 2013年第4期3卷 256-261页

作者： Macduff Okuom Mark Wilson Jordan Groathouse Junsik Lee Dave Symonsbergen Casey Gustafson Mitch Trauernicht Homar Barcena Cassie Reicks Sharmin Sikich Raychelle Burks Andrea Holmes Chemistry Department Doane College Crete USA Novel Chemical Solutions Crete USA

The synthesis and characterization of a novel fluorophore(1), with potential application as an optical brightener are reported. This compound was prepared by reacting 4,4-diaminostilbene-2,2-disulfonic acid with cyanuric chloride in the presence of Na2CO3 followed by the addition of trityl aniline. Solution and solid state fluorescence demonstrated a strong blue/purple emission centered at 450 nm. 1H-NMR spectroscopy, mass spectrometry analysis, elemental analysis, and DOSY-NMR were used for the characterization of the fluorophore.

关键词： Optical Brightener Fluorophore Diaminostilbene cyanuric Chloride Optical Brightness

Investigations on the Degradation of Triazine Herbicides in Water by Photo-Fenton Process

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American Journal of Analytical Chemistry 2014年第8期5卷 500-517页

作者： Sondos Dbira Ahmed Bedoui Nasr Bensalah Department of Chemistry and Earth Sciences College of Arts and Sciences Qatar University Doha Qatar Department of Chemistry Faculty of Sciences of Gabes University of Gabes Gabes Tunisia

In this work, the degradation of 2-chloro-4,6-diamino-1,3,5-triazine in aqueous solutions by photo-Fenton process has been investigated. The preliminary results have shown that the degradation of 2-chloro-4,6-diamino-1,3,5-triazine by photo-Fenton process is more rapid and more effective than Fenton and UV/H2O2 processes. The effects of certain experimental parameters on kinetics and efficiency of the degradation of 2-chloro-4,6,-diamino-1,3,5-triazine by photo-Fenton process, have been evaluated. Under optimal conditions, photo-Fenton process achieved more than 90% of chloride release and about 30% of nitrate formation. The results of total organic carbon (TOC) and total Kjeldahl nitrogen (TKN) analyses have shown that no carbon dioxide and ammonia are formed during photo-Fenton treatment of aqueous solutions containing 40 mg/L triazine. These results indicate that only substituent groups of triazine ring are released;however, nitrogen atoms of triazine ring remain unaffected. A simple mechanism of degradation of 2-chloro-4,6-diamino-1,3,5-triazine has been proposed. The degradation starts by a rapid release of chlorine atoms as chloride ions to form 2-hydroxy-4,6-diamino-1,3,5-triazine. The amino groups of 2-hydroxy-4,6-diamino-1,3,5-triazine undergo are oxidized into nitro groups by hydroxyl radicals to form 2-hydroxy-4,6-dinitro-1,3,5-triazine which undergoes a slow release of nitro groups and their substitution with hydroxyl groups to form cyanuric acid and nitrate ions. The degradation of cyanuric acid by photo-Fenton process has also been investigated. The results of TOC and TKN analyzes show that no carbon dioxide is formed during the treatment.

关键词： Photo-Fenton Process Hydroxyl Radicals s-Triazine Herbicides Degradation cyanuric Acid

A 100% Water Mobile Phase HPLC-PDA Analysis of Meamine and Related Analogues

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American Journal of Analytical Chemistry 2012年第4期3卷 295-299页

作者： Naoto Furusawa Graduate School of Human Life Science Osaka City University Osaka Japan

This paper describes a reserved-phase high performance liquid chromatographic method for detecting melamine (MEL) and related analogues, cyanuric acid (CYA), ammeline (AML), and ammelide (AMD), using a 100% water mobile phase. Chromatographic separation was performed an Inertsil? ODS-4 (250 × 4.6 mm, 5 μm) with a water mobile phase and a photodiode-array detector. The monitoring wavelength was adjusted to 210 nm which represents an average maximum for all the analytes. The total run time was < 8 min. The method shows high stability, significant linearity and satisfactory sensitivity. The detection limits were established in the range 23 - 46 ng.mL–1. An inexpensive and harmless method for the simultaneous detection of MEL, CYA, AML, and AMD was developed and may be further applied to the quantification in foods.

关键词： Melamine cyanuric acid Ammeline Ammelide High-Performance Liquid Chromatography 100% Water Mobile Phase

宠物食品中三聚氰胺及三聚氰酸的液相色谱串联质谱法分析

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分析测试学报 2008年第S1期27卷 203-206页

作者：栾伟安捷伦科技(上海)有限公司上海200131

A rapid and sensitive LC-MS/MS method was established to analyze melamine and cyanuric acid in pet food and its ingredients.HILIC mechanism was utilized to separate small highly polar compounds such as melamine and cyanuric acid.In comparison with US FDA recognized GCMS and LC methods,it turned out that the current technique is superior with easy sample preparation,and the sensitivity and selectivity was found satisfactory.The LOD was 50 ng·L-1 for melamine and 1 μg·L-1 for cyanuric acid,respectively.

关键词： melamine cyanuric acid HILIC pet food LC-MS/MS