新型手性聚(甲基)丙烯酸酯类聚合物的合成与表征

合成了含 2个手性中心的 (甲基 )丙烯酸酯单体 ,(2S ,3S) 4′ (2 氯 3 甲基 )戊酰氧基 4 (甲基 )丙稀酰氧己氧基联苯。以偶氮二异丁腈为引发剂 ,通过自由基聚合方法得到了一类新型的手性聚 (甲基 )丙烯酸酯类聚合物。并采用FTIR和1HNMR表征了各反应中间体、单体以及聚合物的结构 ,利用凝胶渗透色谱 (GPC)测定了所合成聚合物的分子量及分子量分布。聚丙烯酸酯类Mn=12 0 0 0 ,Mw=15 6 90 ,d =1 31;聚甲基丙烯酸酯类Mn=2 12 5 5 ,Mw=385 5 4 ,d =1 81。

Polarized Electronic Spectra of Organic/Inorganic Hybrid Materials of Chiral Schiff Base Ni（ll） or Cu（ll） Complexes and Disperse Red 1 or Azobenzene in PMMA Films

We have prepared new chiral Schiff base complexes, and copper（Ⅱ） （2） to investigate steric effect of ligands for 1 and bis（N-R-l-phenylethyl-5- methoxysalicydenaminato） nickel（Ⅱ） （1） 2 and known bis（N-R-l-phenylethyl-3,5-dichlorosalicydenaminato） nickel（Ⅱ） （3） and copper（Ⅱ） （4）. By using two kinds of photochromic dyes, disperse red 1 （DRI） and azobenzene （AZ）, we investigated the efficiency of increasing optical anisotropy of organic/inorganic hybrid materials of 1 through 4＋AZ or DRI＋PMMA in polymethylmethacrylate （PMMA） cast films by Weigert effect （and compared with cis-trans isomerization by alternate UV and visible light for 3 and 4 to previous study）. Gradual increase of optical anisotropy was observed for all the hybrid materials regardless of flexibility of Schiff base complexes, and the degree of dichroism and weak intermolecular interactions were discussed based on polarized absorption electronic spectra.