Issue 8, 2017

Spectral and photochemical properties of hybrid organic–inorganic nanosystems based on CdS quantum dots and merocyanine ligands

Abstract

The spectral and photochemical properties of hybrid organic–inorganic nanosystems (HNSs) were investigated. HNS consisted of CdS quantum dots (QDs) functionalized with ligands containing the isothiouronium anchor group linked by a polymethylene chain with photochromic merocyanine (MC). The HNS synthesis was carried out via a microwave-assisted one-pot technique. Energy transfer from the QDs to MC in the HNS was observed and resulted in QD fluorescence quenching and MC sensitization. Compared to the free MC, transcis photoisomerization of MC in the HNS was suppressed and its photodestruction was accelerated. In addition, upon HNS photolysis by visible light with energy higher than the threshold, the photosensitized destruction of the QDs (which did not absorb the applied light) occurred. The observed effects were proposed to be caused by MC adsorption on QDs surface, which leads to the restriction of the MC photoisomerization and population of the surface electron trap states of the QDs.

Graphical abstract: Spectral and photochemical properties of hybrid organic–inorganic nanosystems based on CdS quantum dots and merocyanine ligands

Supplementary files

Article information

Article type
Paper
Submitted
07 Apr 2017
Accepted
30 May 2017
First published
31 May 2017
This article is Open Access
Creative Commons BY license

Photochem. Photobiol. Sci., 2017,16, 1252-1259

Spectral and photochemical properties of hybrid organic–inorganic nanosystems based on CdS quantum dots and merocyanine ligands

O. V. Chashchikhin and M. F. Budyka, Photochem. Photobiol. Sci., 2017, 16, 1252 DOI: 10.1039/C7PP00137A

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