Molecular Self-Assembly at Metal-Electrolyte Interfaces

International Journal of Molecular Sciences

Thanh Hai Phan¹ 

[1] Institute of Physical and Theoretical Chemistry, University of Bonn, Wegelerstr, 12, D-53115 Bonn, Germany

关键词: self-assembly;    porphyrin;    viologen;    cyclic voltammogram;    scanning tunneling microscopy;    X-ray photoelectron spectroscopy;   

DOI  :  10.3390/ijms14034498

来源: mdpi

【 摘 要 】

The self-assembly of molecular layers has become an important strategy in modern design of functional materials. However, in particular, large organic molecules may no longer be sufficiently volatile to be deposited by vapor deposition. In this case, deposition from solution may be a promising route; in ionic form, these molecules may even be soluble in water. In this contribution, we present and discuss results on the electrochemical deposition of viologen- and porphyrin molecules as well as their co-adsorption on chloride modified Cu(100) and Cu(111) single crystal electrode surfaces from aqueous acidic solutions. Using in situ techniques like cyclic voltametry and high resolution scanning tunneling microscopy, as well as ex-situ photoelectron spectroscopy data the highly ordered self-assembled organic layers are characterized with respect to their electrochemical behavior, lateral order and inner conformation as well as phase transitions thereof as a function of their redox-state and the symmetry of the substrate. As a result, detailed structure models are derived and are discussed in terms of the prevailing interactions.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.