国产日产欧美精品-亚洲国产综合久久精品-色综合色国产热无码一-亚洲欧美日本国产,免费观看一区二区三区_在线观看片A免费不卡观看_亚洲а∨天堂久久精品_99久无码中文字幕一本久道

產(chǎn)品展廳收藏該商鋪

您好 登錄 注冊(cè)

當(dāng)前位置:
美國布魯克海文儀器公司>資料下載>測(cè)量應(yīng)用案例-77-200SM

資料下載

測(cè)量應(yīng)用案例-77-200SM

閱讀:279          發(fā)布時(shí)間:2015-9-11
提 供 商 美國布魯克海文儀器公司 資料大小 0K
資料圖片 下載次數(shù) 2次
資料類型 瀏覽次數(shù) 279次
免費(fèi)下載    
 文獻(xiàn)名: “Sergeants and soldiers rule” in helical substituted polyacetylene-derived copolymer nanoparticles
 
作者: Biao Zhao, Chunni Chen, Huajun Huang, Jianping Deng
 
摘要:This article reports on the catalytic emulsion copolymerizations of chiral/achiral substituted acetylene monomers. An achiral N-propargylamide monomer underwent copolymerizations separay with two enantiopure monomers of chiral N-propargylsulfamide in the presence of (nbd)Rh+B−(C6H5)4 as catalyst and with Triton X-100 as emulsifier. The obtained (co)polymer emulsions demonstrated high stability and optical activity. Transmission electron microscopy (TEM) and gel permeation chromatography (GPC) techniques in combination demonstrated the successful formation of nanoparticles (100?300 nm in diameter) constructed by copolymers. Circular dichroism and UV-vis absorption spectra showed that the (co)polymer chains in the nanoparticles adopted helical structures of a predominant helicity, which enabled the copolymer nanoparticles to show optical activity. Compared to the corresponding nanoparticles of the homopolymers, the nanoparticles constructed by the copolymers exhibited blue shifts in circular dichroism (CD) and UV-vis spectra. The present study demonstrated that the copolymers prepared via emulsion polymerization approach followed the “sergeants and soldiers rule.”
 
關(guān)鍵詞:Emulsion polymerization;Helical polymer;Optical activity;Sergeants and soldiers rule
 

收藏該商鋪

請(qǐng) 登錄 后再收藏

提示

您的留言已提交成功!我們將在第一時(shí)間回復(fù)您~

對(duì)比框

產(chǎn)品對(duì)比 產(chǎn)品對(duì)比 聯(lián)系電話 二維碼 意見反饋 在線交流

掃一掃訪問手機(jī)商鋪
010-62081908
在線留言
措勤县| 富民县| 顺义区| 中超| 平山县| 建昌县| 丹寨县| 彭州市| 天等县| 阿拉尔市| 永城市| 达日县| 和硕县| 二手房| 西盟| 开江县| 蒲江县| 兖州市| 唐山市| 九龙县| 平谷区| 惠来县| 岱山县| 油尖旺区| 灵山县| 舒城县| 平和县| 通城县| 邻水| 黔西县| 大竹县| 怀仁县| 临高县| 铜山县| 屏东县| 绥宁县| 那坡县| 荔波县| 赤壁市| 大港区| 扶风县|