Rodriguez Kenneth R, Shah Summit, Williams Shaun M, Teeters-Kennedy Shannon, Coe James V
Department of Chemistry, The Ohio State University, Columbus, Ohio 43210-1173, USA.
J Chem Phys. 2004 Nov 8;121(18):8671-5. doi: 10.1063/1.1814052.
The surface-plasmon-mediated, extraordinary transmission of metallic arrays of subwavelength apertures has been used as the light source for absorption studies of self-assembled monolayers on metal. Enhanced infrared absorption spectra of a sequence of alkanethiol self-assembled monolayers on copper were recorded for carbon chain lengths varying from 8 to 18 atoms. Transition positions and intensities are presented over a large range of the infrared region. The connection between the vibrational modes of the CH(2) wagging progression and the infinite methylene chain is explored using a traditional coupled oscillator approach and a new cluster perspective.
表面等离子体介导的亚波长孔径金属阵列的超常透射已被用作研究金属表面自组装单分子层吸收的光源。记录了一系列碳链长度从8到18个原子的硫醇自组装单分子层在铜表面的增强红外吸收光谱。给出了在大范围红外区域内的跃迁位置和强度。采用传统的耦合振子方法和新的簇观点，探讨了CH(2)摇摆跃迁的振动模式与无限亚甲基链之间的联系。
