Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
ACS Appl Mater Interfaces. 2012 Dec;4(12):6935-41. doi: 10.1021/am302069p. Epub 2012 Dec 3.
A self-assembled monolayer (SAM)-based fluorescent film was designed and prepared by chemical immobilization of a novel oligo(p-phenylene- ethynylene) (OPE) with cholic acid moieties at the ends of its side chains (Film 1). As a control, a similar film, Film 2, of which OPE brings no side chains, was also prepared. The structures of the films were characterized by contact angle, XPS, ATR-IR and fluorescence measurements. Fluorescence studies revealed that the emission of Film 1 is sensitive to the presence of trace amount of some inorganic acids in acetone, such as HCl, H(2)SO(4), HNO(3), and H(3)PO(4), etc., whereas the acids as studied showed little effect on the emission of Film 2. The difference in the sensing performances of the two films have been rationalized by considering presence or absence of a possible cavity, a substructure appearing above the OPE adlayer which is something like a dimer of cholic acid (CholA) formed at specific environment.
设计并制备了一种基于自组装单分子层（SAM）的荧光膜，通过化学固定末端带有胆酸部分的新型寡聚（对亚苯基乙炔）（OPE）（膜 1）。作为对照，还制备了具有 OPE 无侧链的类似膜（膜 2）。通过接触角、XPS、ATR-IR 和荧光测量对膜的结构进行了表征。荧光研究表明，膜 1 的发射对丙酮中痕量无机酸（如 HCl、H2SO4、HNO3 和 H3PO4 等）的存在敏感，而所研究的酸对膜 2 的发射几乎没有影响。通过考虑是否存在可能的空腔（OPE 覆盖层上方出现的亚结构，类似于在特定环境中形成的胆酸（CholA）二聚体），对两种膜的传感性能差异进行了合理化解释。
