Abstract: Asimple UV-visible, circular dichroism thin-layer spectroelectrochemical cell with long optical path has been designed and characterized. The cell with 10 mm quartz cuvette as the optical window, two pieces of 5 mm×10 mm×15 mm teflon as the electrode supporters and a glassy carbon slide as the working electrode has an adjustable thickness of thin-layer. We have carried out the optical and electrochemical experiments of characterization with K₃Fe(CN)s and tyrosine working system, which show the cell has a very good thin-layer electrochemistry character and fast spectroelectrochemistry response. The cell can also be used in circular dichroism electrochemistry study.

Key words: UV-visible spectroscopy. Circular dichroism, Long optical path thin-layer cell, Ty-rosine, Spectroelectrochermstry