Morphology Analysis of Mixed CuTTBPc/Transfer Promoter Layers at the Air/Water Interface by Brewster Angle Microscopy.

• Main Authors: Wan-Yu Wu, 吳婉鈺
• Other Authors: Chien-Hsiang Chang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/74814805613845367445

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 94 === This study investigated the influence of transfer promoter addition on the layer morphology of copper (II)2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine （CuTTBPc）at the air/water interface. Due to the strong interactions between CuTTBPc molecules, the aggregation of CuTTBPc molecules at the interface is difficult to be avoided even by changing the spreading solvent or decreasing the CuTTBPc surface density. However, experimental results demonstrated that by the addition of arachidic acid, the extent of CuTTBPc molecule aggregation at the air/water interface could be reduced, improving the CuTTBPc layer homogeneity. When 1-eicosanol was added with a mol% of 20 or 50 as the transfer promoter, BAM images of the mixed CuTTBPc/1-eicosanol layers were similar to those of a CuTTBPc layer. It appears that CuTTBPc may control the mixed layer morphology probably because of the self-aggregation of 1-eicosanol molecules. With the presence of 20mol% 1-octadecanol in a CuTTBPc layer, the formation of inhomogeneous bright network structures was inhibited. When the concentration of 1-eicosanol in a mixed layer was increased to 50mol%, the homogeneity of the mixed layer could be improved. If 1-hexadecanol was used as the transfer promoter, part of CuTTBPc molecules would self-aggregate to form bright domains distributing in the mixed layer, probably because 1-hexadecanol controlled the mixed layer behavior. By comparing the mixed layer morphology of CuTTBPc with various transfer promoters at the air/water interface, one can find that with the presence of arachidic acid, it is easy to obtain a mixed layer with homogeneous structures and formation of irregular aggregates is barely detected. If a long-chain alcohol is used as the transfer promoter, both the concentration and hydrocarbon chain length have to be considered in order to obtain a homogeneous mixed layer.