Li Junwei, Janout Vaclav, Regen Steven L
Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA.
Langmuir. 2006 Dec 19;22(26):11224-9. doi: 10.1021/la062573g.
Langmuir-Blodgett (LB) monolayers of 5,11,17,23,29,35-hexaformyl-37,38,39,40,41,42-hexakis(1-n-octyloxy)calix[6]arene (2), deposited onto silylated silicon wafers, were cross-linked (i.e., "covalently glued") via Schiff base formation with poly(allylamine). Direct evidence for imine formation was obtained from X-ray photoelectron spectroscopy and from attenuated total reflection IR spectroscopy. These modified surfaces could be removed from the aqueous subphase into air with retention of the assembly and its orientation relative to the surface, as evidenced by atomic force microscopy, water contact angle measurements, and film thickness determinations by ellipsometry. Similar assemblies were also synthesized via a postgluing procedure, in which the substrate containing the LB monolayer was removed from the subphase and rapidly immersed into an aqueous solution containing poly(allylamine). The potential of combining postgluing methods with continuous LB film deposition as a surface modification technique is briefly discussed.
沉积在硅烷化硅片上的5,11,17,23,29,35-六甲酰基-37,38,39,40,41,42-六（1-正辛氧基）杯[6]芳烃（2）的朗缪尔-布洛杰特（LB）单分子层，通过与聚烯丙胺形成席夫碱进行交联（即“共价胶合”）。通过X射线光电子能谱和衰减全反射红外光谱获得了亚胺形成的直接证据。原子力显微镜、水接触角测量以及椭圆偏振法测定膜厚度表明，这些改性表面可以从水亚相中转移到空气中，同时保持组装体及其相对于表面的取向。类似的组装体也通过后胶合程序合成，其中将含有LB单分子层的基底从亚相中取出并迅速浸入含有聚烯丙胺的水溶液中。简要讨论了将后胶合方法与连续LB膜沉积相结合作为一种表面改性技术的潜力。
