作者:Nozomi Saito、Ryo Terakawa、Masanori Shigeno、Ryo Amemiya、Masahiko Yamaguchi
DOI:10.1021/jo200658q
日期:2011.6.17
oligomers with different side chains were synthesized: (P)-bD-n (n = 2–6) with branched alkyloxycarbonyl side chains; (P)-S-n (n = 2–7) with decylsulfanyl side chains; and (P)-DF-n (n = 4, 6, 8, 10) with alternating decyloxycarbonyl and perfluorooctyl side chains. The double helix formation of these side chain derivatives was compared to that of (P)-D-n with decyloxycarbonyl side chains. CD, UV–vis, and vapor
合成了三个具有不同侧链的乙炔基螺旋烯低聚物:(P)-bD- n(n = 2–6)带有支链烷氧基羰基侧链;(P)-S- n(n = 2–7),带有癸硫基侧链;(P)-DF- n(n=4、6、8、10 ),具有交替的癸氧基羰基和全氟辛基侧链。将这些侧链衍生物的双螺旋形成与具有癸氧基羰基侧链的(P)-D- n的双螺旋形成进行比较。CD,UV-vis和蒸气压渗透压法(VPO)研究表明,(P)-bD- n形成了双螺旋以及(P)-D- n。在不同温度和浓度三氟甲基苯CD研究表明,(的集合体的稳定性P)-bD- 6是相似的(的P)-D- 6。侧链的疏松度对聚集几乎没有影响,这表明芳族部分的π-π相互作用对于双螺旋的形成至关重要。在所有检查的溶剂中,(P)-S- n为无规卷曲,但三氟甲基苯除外。而(P)-D- 7在甲苯中以1×10 –3 M形成双螺旋,而(P)-S-7是随机线圈。该结果表明(P)-S- n的双螺旋形成能力显着低于(P)-D-