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求助把中文摘要翻译成英文（化工类）
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壳聚糖负载钯催化合成对溴苯乙炔的研究 摘要：壳聚 糖 是 自然界迄今所发现的唯一天然碱性多糖，其结构中包含氨基葡萄糖单元和乙酞氨基葡萄糖的生物可降单元，对一些金属离子尤其是过渡金属离子有良好的鳌合作用，其来源广泛，具有很好解性。在自然界中可被壳聚糖酶、溶菌酶和微生物完全生物降解，是一可再生资源和环境友好材料。 本文概述了和聚糖的结构及化学性质，介绍了壳聚糖的化学改性的研究进展；简述了改性壳聚糖在医药、膜分离、工业废水处理、日用化工行业、食品工业等方面的应用；概述了壳聚糖负载各种贵金属催化剂的制备及其研究进展。本论文研究的是壳聚糖负载氯化钯催化合成对溴苯乙炔并对产物进行表征，同时还研究了壳聚糖负载氯化钯催化合成对溴苯乙炔的最佳反应条件。 主要研究内容如下： 制备了壳聚糖负载氯化钯催化剂，并用其催化合成了对溴苯乙炔，用红外光谱仪对产物进行了表征。结果表明实验得到的产物确实是目标产物对溴苯乙炔。同时还研究了反应温度、反应时间、壳聚糖负载氯化钯催化剂、共催化剂CuI和水对反应产率的影响，发现在合成对溴苯乙炔时，反应温度控制在80℃，反应时间控制在12小时，共催化剂CuI物质的量约为化合物Ⅱ的0.01倍时，该偶联反应的产率较高；壳聚糖负载氯化钯催化剂的使用量对该反应影响不是很大；少量的水对该反应几乎没有影响。 只要翻译成英文就可以了！急需！谢谢各位好人！ |
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仅供参考
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Abstract: Chitosan is the natural world found so far the only Trona of polysaccharide, its structure contains glucosamine unit and a B-phthalocyanine glucose can drop the biological unit, a number of metal ions in particular, the transition metal ions is a good Ao Cooperation with its wide array of sources, and has a good solution. In nature can be chitosanase, lysozyme and microbial completely biodegradable, is a renewable resource and environment-friendly materials. This paper outlines the structure and xylanase and chemical nature, the chitosan on the chemical modification of the progress outlined a modified chitosan in medicine, membrane separation, industrial wastewater treatment, daily chemical industry, food industry , And other aspects of the application outlines the various precious metal catalyst chitosan load of preparation and research progress. This paper is chitosan load on the Synthesis of palladium chloride bromophenyl acetylene and products were characterized, but also on the chitosan load PdCl2 Synthesis of acetylene Bromoxynil the best conditions. Main contents are as follows: Preparation of the chitosan load palladium chloride catalyst, and with its catalytic synthesis of the bromophenyl acetylene, using infrared spectrometer on the product was characterized. The experimental results showed that the product is indeed the goal of Bromoxynil acetylene. At the same time also studied the reaction temperature and time, chitosan load palladium chloride catalyst, a total catalyst CuI and water yield on the reaction of the impact, found in the synthesis of acetylene Bromoxynil, the temperature control in 80 ℃, the reaction time Control in 12 hours, a total catalyst CuI material is about 0.01 times the compound Ⅱ, the coupling of the higher yield; chitosan load chloride palladium catalyst in the use of the response to the impact is not great; small amounts of Water almost no impact on the response. |
7楼2008-06-16 15:28:21
huahua840115
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2楼2008-06-15 14:40:34
3楼2008-06-15 15:53:26
| Chitosan is the only kind of naturally occurring basic polysaccharide which has been discovered by hunman so far. Its structure inludes the basic unit of chitosan and biodegradable ethyl phthalein glucosamine unit. So chitosan has chelation on metal ions especially some transition metal ions. Chitosan has extensive sources and good solubility. |
4楼2008-06-16 14:41:04