The effects of layered nanoparticles and their properties on the molecular aggregation of organic dyes

Publication date: June 2018Source: Journal of Photochemistry and Photobiology C: Photochemistry Reviews, Volume 35Author(s): Juraj BujdákAbstractThe phenomenon of metachromasia, which is related to molecular aggregation, leads to significant changes in the photophysical properties of dyes. This review summarizes existing knowledge about molecular aggregation in hybrid systems containing inorganic nanoparticles and metachromatic dyes. The history of metachromasia, physical principles of molecular aggregation, and spectral properties of dye aggregates of various structures are briefly presented. The structure, surface properties, and several types of layered nanomaterials are also described. The main part of the review covers the fundamental properties of nanoparticles, metachromatic dyes, and their hybrid systems, that influence the aggregation of dye molecules. The focus is on the colloidal properties and the surface charge effect of nanoparticles. The importance of the surface charge of layered particles is demonstrated by detailed analysis of current research. The relevance of the phenomenon of molecular aggregation for research and application in the context of layered nanoparticles is then summarized.Graphical abstract

Source: Journal of Photochemistry and Photobiology C: Photochemistry Reviews - July 5, 2018 Category: Chemistry Source Type: research