Abstract
Diaza-18-crown-6-ethers appending two pyrenyl (Py-C) or two carbazolyl (Cz-C) groups form 1 : 1 host–guest complexes with methyl viologen chloride (MV2+). These complexes were assembled into monolayers by Langmuir-Blodgett (L-B) technique. The generated assembly involves the general structure of donor-sensitizer-acceptor (Cz-Py-MV2+) in space, although any of the photo- and redox-active components are not covalently bonded. This assembly was transferred on an indiumtin oxide (ITO) glass to fabricate an electrode. The photoinduced voltage of this electrode was measured with a saturated calomel reference electrode in hydroquinone (H2Q) solution to be ca. 168 mV with the light intensity of ca. 218 mW/cm2. This electrode was used as the light electrode to construct a photogalvanic cell with a platinum electrode as the dark electrode. Irradiation of the light electrode resulted in anodic photocurrent. The effects of light intensity, bias voltage, concentration of H2Q and oxygen on the photocurrent were investigated.
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