|
OALib Journal期刊
ISSN: 2333-9721
费用：99美元
|
|
|
|
L-丙烯酸薄荷酯与2,5-二(4'-己氧基苯基)苯乙烯无规共聚物的合成和旋光性质
DOI: 10.3724/SP.J.1105.2011.10289, PP. 1202-1207
Keywords: 比旋光度,旋光性共聚物,手性传递,自由基聚合,竞聚率
Abstract:
通过自由基共聚合制备了一系列L-丙烯酸薄荷酯(L-MtA)与2,5-二(4'-己氧基苯基)苯乙烯(BHPSt)的共聚物L-MtA(x)-co-BHPSt(1-x).利用UV-Vis和1H-NMR光谱表征了共聚物的组成,根据Kelen-Tüd's(K-T)方法计算得到的L-MtA和BHPSt的竞聚率分别为0.36和2.46,说明两结构单元在聚合物链中倾向于无规排列.当BHPSt含量较少时,共聚物在三联苯侧基的紫外吸收区呈现明显的Cotton效应,说明某种手性结构的形成;而当BHPSt含量足够大时,共聚物具有和光学活性螺旋链聚{(+)-2,5-二[4'-((S)-2-甲基丁氧基)苯基]苯乙烯}(PMBPS)类似的圆二色光谱,说明BHPSt链段能够形成稳定的螺旋构象,且由于L-MtA单元的手性诱导,其旋向在某一方向占优.
| [1] | 1 Green M M, Park J W,Sato T,Teramoto A,Lifson S,Selinger R L B,Selinger J V.Angew Chem Int Ed,1999,38:3138~3154 2 Nakano T,Okamoto Y.Chem Rev,2001,101:4013~4038 3 Fujiki M.Top Curr Chem,2008,284:119~186 4 Majumdar R N,Carlini C,Nocci R,Ciardelli F,Schulz R C.Makromol Chem,1976,177:3619~3623 5 Ciardelli F,Righini C,Zandomeneghi M,Hug W.J Phys Chem,1977,81:1948~1953 6 Chiellini E,Solaro R,Ciardelli F.Makromol Chem,1982,183:103~114 7 Altomare A,Carlini C,Ciardelli F.J Polym Sci Polym Chem Ed,1983,21:1693~1698 8 Altomare A,Carlini C,Ciardelli F,Panattoni M,Solaro R.Conv Ital Sci Macromol,1983,2:87~90 9 Altomare A,Carlini C,Ciardelli F,Panattoni M,Solaro R,Houben J L.Macromolecules,1985,18:729~734 10 Fakhrul-Azam A K M,Kamigaito M,Okamoto Y.J Polym Sci Part A:Polym Chem,2007,45:1304~1315 11 Yu Z,Wan X,Zhang H,Chen X,Zhou Q.Chem Commun,2003:974~975 12 Liu A,Zhi J,Cui J,Wan X,Zhou Q.Macromolecules,2007,40:8233~8243 13 Cui J,Liu A,Cao H,Wan X,Zhou Q.Chem Asia J,2010,5:1139~1145 14 Yu Z,Tu H,Wan X,Chen X,Zhou Q.J Polym Sci Part A:Polym Chem,2003,41:1454~1464 15 Lee-Ruff E,Xi F,Qie J,Jiang H.J Org Chem,1996,61:1547~1550 16 Kelen T,Tüd？s F.J Macromol Sci Chem,1975,9:1~27 17 Wulff G,Zabrocki K,Hohn J.Angew Chem Int Ed,1978,17:535~536 18 Wulff G.Angew Chem,1989,101:22~38
|
Full-Text
|
|
Contact Us
service@oalib.com QQ:3279437679 
WhatsApp +8615387084133
|
|
