Establishment of highly-sensitive spectroelectrochemical reflection measurement system for the characterization of structures and electrochemical functions of organic thin films

建立高灵敏度光谱电化学反射测量系统用于表征有机薄膜的结构和电化学功能

基本信息

批准号：
06555263
负责人：
NAKASHIMA Naotoshi
金额：
$ 3.14万
依托单位：
Nagasaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

Various organic thin films including new designed and synthesized lipid-bilayr films with electronic functions coated on electrode surfaces were characterized from structural and functional viewpoints by using highiy-sensitive spectroelectrochemical reflection measurement system, which was constructed in this work. The new findings obtained are :1.LB and cast films of bilayrs of artificial lipids bearing flavin moieties were successfully assembled on electrode surfaces.2.It was found that alkanethiol self-assembled monolayr (SAM) on a gold electrode serves an ultra-thin medium for the electrode reaction of organic dyes though preventing from the direct contact of the dyes onto the gold surface.3.Characterization of SAM of butylviologenthiol on a gold electrode using polarized reflection measurement revealed that the viologen forms a dimer conformation when being reduced and that the orientation angle of the transition moment of the viologen with respect to surface normal is 75ﾟ.4.Hemin-bidentate imidazole ligand complex deposited on a graphite electrode surface was found to be in 6-coordinated state from the reflection spectral measurements.5.It was confirmed that the constructed reflection measurement system is sensitive enough to measure the reflection spectrum of myoglobin incorporated in a lipid cast film coated on a graphite electrode surface of low reflectivity.

利用本工作构建的高灵敏度光谱电化学反射测量系统，从结构和功能的角度对各种有机薄膜（包括新设计和合成的具有电子功能的脂质双层薄膜）进行了表征，获得的新发现是： 1.LB和带有黄素部分的双层人工脂质的流延膜成功地组装在电极表面上。2.发现金电极上的链烷硫醇自组装单层（SAM）可以发挥作用一种用于有机染料电极反应的超薄介质，同时防止染料直接接触金表面。3.使用偏振反射测量对金电极上丁基紫罗碱硫醇的 SAM 进行表征，表明紫罗碱在以下情况下形成二聚体构象：紫精的跃迁矩相对于表面法线的取向角为75°。4.在石墨电极上沉积高铁血红素-二齿咪唑配体络合物反射光谱测量发现表面处于6配位状态。5.证实所构建的反射测量系统足够灵敏，可以测量石墨电极表面涂覆的脂质流延膜中掺入的肌红蛋白的反射光谱。低反射率。