Synthesis Of Cruciform Amphiphilic An-OPE Molecules And Their Thin Film Property Characterization

Two types of cruciform amphiphilic oligo (phenylene ethynylene)(OPE) molecules (An-OPE1 and An-OPE2) have been synthesized and their corresponding well-structured films fabricated by Langmuir-Blodgett (LB) technique were characterized in this paper. Combined with LB technique, we focus our work on the study of structure growth and energy transfer model of these two types of molecules using ultraviolet (UV) spectroscopy and fluorescence (FL) spectroscopy.This paper consists of four paragraphs as follows:Chapter 1: This chapter is divided into two parts. The concept of molecular devices and molecular wires is introduced, and the research background such as research development is reviewed and summarized in the first part. In the second part, the LB technique is introduced.Chapter 2: A series of routine characterization techniques and instruments used in this paper are introduced, such as ultraviolet (UV) spectroscopy, fluorescence (FL) spectroscopy, and LB technique.Chapter 3: The cruciform amphiphilic organic molecule An-OPEs is synthesized by Sonogashira reaction, and its well-defined LB films were fabricated. We built the structure growth and energy transfer model of organic molecules by investigating the optical properties of LB films.Chapter 4: A series of dendrimer molecules were synthesized, which are the "shell" of "core-shell" molecules and can be used to decrease the interaction among OPE molecules.