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lxhlxh052c木蟲(chóng) (著名寫(xiě)手)
小木蟲(chóng)之無(wú)蟲(chóng)
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[交流]
幫幫忙啊，急用�。。�
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超支化分子是近年來(lái)發(fā)展起來(lái)的一類新型有機(jī)高分子，由于分子內(nèi)空穴、可修飾的表面端基及良好的溶解性，已成為主客體化學(xué)研究的熱點(diǎn)之一，并在藥物釋放、催化劑、纖維染色、傳感器等方面顯示出了良好的應(yīng)用前景[3]。Victor等[4]在研究樹(shù)枝狀包裹型催化劑的同時(shí)，描述了一種通過(guò)靜電力自組裝樹(shù)枝狀大分子的結(jié)構(gòu)，這種具有稠密的疏水性外圍基團(tuán)的大分子，能溶解于非極性溶劑，并能將水溶性的有機(jī)分子通過(guò)與樹(shù)枝狀大分子結(jié)合，從水相轉(zhuǎn)移到非極性溶劑中去。Sunder[5]報(bào)道超支化分子可以成功地將不溶于氯仿等有機(jī)溶劑的水溶性小分子染料捕捉到聚合物的孔穴中，實(shí)現(xiàn)對(duì)小分子染料的裝載。目前用于裝載小分子的超支化聚合物主要有Poly(glyc-erols[5]、Poly(ester amide) [6]和Poly(ethyleneimine) [7]等。 本文以十二胺為原料，與丙烯酸甲酯、乙二胺分別進(jìn)行邁克爾加成反應(yīng)和酰胺化縮合反應(yīng)，合成了一種一端具有長(zhǎng)鏈烷基，另一端具有低支化結(jié)構(gòu)的超支化有機(jī)物R12-1.0G，在對(duì)產(chǎn)物進(jìn)行結(jié)構(gòu)表征的同時(shí)，將其與月桂酸進(jìn)行靜電力自組裝，得到了具有疏水性外圍的自組裝大分子，在以自組裝大分子為宿主，研究了月桂酸與甲苯的質(zhì)量比、R12-1.0G濃度對(duì)染料剛果紅的相轉(zhuǎn)移行為的影響規(guī)律。由于超支化分子的合成無(wú)需純化，工藝簡(jiǎn)單，自組裝分子無(wú)需合成，所以這類有機(jī)物在處理含染料廢水方面具有潛在的應(yīng)用前景[8]。 求高手幫忙，真的著急用，要不然也不用來(lái)這求助了，謝謝了，最好專業(yè)一點(diǎn)�。。� |
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lxhlxh052c
木蟲(chóng) (著名寫(xiě)手)
小木蟲(chóng)之無(wú)蟲(chóng)
- 應(yīng)助: 21 (小學(xué)生)
- 貴賓: 0.025
- 金幣: 1043.8
- 散金: 2700
- 紅花: 26
- 沙發(fā): 10
- 帖子: 1915
- 在線: 618.7小時(shí)
- 蟲(chóng)號(hào): 759932
- 注冊(cè): 2009-04-29
- 性別: GG
- 專業(yè): 化學(xué)動(dòng)力學(xué)
3樓2010-05-06 08:34:49
lxhlxh052c(金幣+10, 翻譯EPI+1): 2010-05-06 08:34:58
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Recently developed hyperbranched molecules compose a novel type of organic polymers, which form a hot host-guest study focus due to their intramolecular cavity, modifiable surfactant end-groups and good solubility. Hyperbranched molecules have shown potentials in applications such as medicinal release, catalysis, fiber dying, sensor etc. Vitor et al. describe a self-assembled structure formed via electro-static interactions in their study on dendrimeric encapsulated catalysts. The macromolecules, densely packed hydrophobic groups at periphery, can dissolve in non-polar solvent, and can extract organic molecules from water phase to non-polar phase by combining the organic molecules with their dendrimeric structures. Sunder has reported that hyperbranched molecules can successfully capture small molecules, which are water soluable but insoluable in organic solvents (e.g. Chloroform etc.) , into their cavities. By this way, hyperbranched molecules can load small molecular dyes. Currently, small molecule loading hyperbranched molecules are mainly Poly(glyc-erols[5]、Poly(ester amide) [6], Poly(ethyleneimine) [7], etc. In this work, dodeca-amine is used as the starting material, reacting with methyl acrylate through Michael addition and ethylenediamine through amide condensation, respectively. The product, hyperbranched molecule R12-1.0G, has chain alkanes at one terminal and hypobranched structure at the other end. The structured is characterizated. Furthermore, it self-assembles with lauric acid by eletro-static interactions, which forms peripherally hydrophobic self-assembled macromolecules. The macromolecules are used as hosts to study phase transition of the Congo red under the influences of the mass ratio of lauric acid over toluene and concentration of R12-1.0G. As hyperbranched molecules do not require purification, easy to synthesize and can self-assemble, they are promising organic materials in dye-containing waste water treatment. [ Last edited by c111999 on 2010-5-6 at 04:48 ] |
2樓2010-05-06 04:43:30
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