Title: Supramolecular organization of dye molecules in zeolite L channels : synthesis, properties, and composite materials
Authors : Cao, Pengpeng
Khorev, Oleg
Devaux, André
Sägesser, Lucie
Kunzmann, Andreas
Ecker, Achim
Häner, Robert
Brühwiler, Dominik
Calzaferri, Gion
Belser, Peter
Published in : Chemistry : a European Journal
Volume(Issue) : 22
Issue : 12
Pages : 4046
Pages to: 4060
Publisher / Ed. Institution : Wiley-VCH
Issue Date: 2016
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : ZeoFRET; Dye; Fluorescence; Zeolite
Subject (DDC) : 540: Chemistry
Abstract: Sequential insertion of different dyes into the 1D channels of zeolite L (ZL) leads to supramolecular sandwich structures and allows the formation of sophisticated antenna composites for light harvesting, transport, and trapping. The synthesis and properties of dye molecules, host materials, composites, and composites embedded in polymer matrices, including two- and three-color antenna systems, are described. Perylene diimide (PDI) dyes are an important class of chromophores and are of great interest for the synthesis of artificial antenna systems. They are especially well suited to advancing our understanding of the structure-transport relationship in ZL because their core fits tightly through the 12-ring channel opening. The substituents at both ends of the PDIs can be varied to a large extent without influencing their electronic absorption and fluorescence spectra. The intercalation/insertion of 17 PDIs, 2 terrylenes, and 1 quaterrylene into ZL are compared and their interactions with the inner surface of the ZL nanochannels discussed. ZL crystals of about 500 nm in size have been used because they meet the criteria that must be respected for the preparation of antenna composites for light harvesting, transport, and trapping. The photostability of dyes is considerably improved by inserting them into the ZL channels because the guests are protected by being confined. Plugging the channel entrances, so that the guests cannot escape into the environment is a prerequisite for achieving long-term stability of composites embedded in an organic matrix. Successful methods to achieve this goal are described. Finally, the embedding of dye-ZL composites in polymer matrices, while maintaining optical transparency, is reported. These results facilitate the rational design of advanced dye-zeolite composite materials and provide powerful tools for further developing and understanding artificial antenna systems, which are among the most fascinating subjects of current photochemistry and photophysics.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.1002/chem.201504404
ISSN: 0947-6539
URI: https://digitalcollection.zhaw.ch/handle/11475/2603
Published as part of the ZHAW project : Langzeitstabilität von eingebetteten ZeoFRET-Komposita
Appears in Collections:Publikationen Life Sciences und Facility Management

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