Structural evaluation of 6-(10-Mercaptodecoxyl) quinoline self-assembled monolayer on gold by reflectance absorption infrared spectroscopy

• Main Authors: Zhang, Hao-Li, Zhang, Hua, Zhang, Jin, Li, Hu-Lin, Liu, Zhong-Fan
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Materials
• Online Access: https://hdl.handle.net/10356/95577; http://hdl.handle.net/10220/8947
• Institution: Nanyang Technological University

Self-assembled monolayer (SAM) of 6-(10-mercaptodecaoxyl)quinoline (MDQ) on gold was characterized by reflectanceabsorptioninfraredspectroscopy (RA-IR). The molecular orientation of MDQ in the SAM was totally evaluated by comparing the RA-IR spectrum of the SAM with a transmission spectrum of a KBr pellet. It was found that the alkyl chain exhibit a tilting angle of 24±5° and a twisting angle of 50±5°. The results suggested that the quinoline moieties in the SAM form an order layer upon the hydrocarbon chain and do not disturb the packing of the alkyl chains obviously.