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The Nature of Interactions and UV-Induced Response within α-Zirconium Phosphate Intercalation Compounds with Azobenzenes

1
Department of Mineralogy, Petrography and Geochemistry, Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
2
Polish Academy of Sciences, Institute of Geological Sciences, ul. Senacka 1, 30-063 Kraków, Poland
*
Author to whom correspondence should be addressed.
Materials 2019, 12(9), 1436; https://doi.org/10.3390/ma12091436
Received: 27 March 2019 / Revised: 27 April 2019 / Accepted: 30 April 2019 / Published: 2 May 2019
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Abstract

Azobenzenes immobilization on a solid support enables the usage of their trans-cis isomerization ability for preparation of functional materials. The behavior of azobenzenes in the interlayer space of α-zirconium phosphate (ZrP) upon the UV–Vis irradiation was investigated. Two experimental approaches were performed: (1) co-intercalation of benzylalkylammonium surfactants and azobenzene in the interlayers of ZrP (ZBCnA), and (2) intercalation of p-aminoazobenzene (ZpA). The materials were characterized with XRD, FTIR, UV–Vis, CHN analysis, and the molecular modeling. The molecules in ZBCnA samples were sparsely packed and held by weak hydrophobic interactions. Conversely, the molecules in ZpA sample were strongly H-bonded to the ZrP, well-ordered, and densely packed. These structural features determined the samples’ photoresponsive behavior. Low density of molecules in the ZBCnA samples, allowed the effective, fast, and reversible isomerization of azobenzene. Whereas the ZpA sample did not react to the UV irradiation because of the steric hindrance of tightly packed molecules. View Full-Text
Keywords: α-zirconium phosphate; azobenzenes; intercalation; photoactivity α-zirconium phosphate; azobenzenes; intercalation; photoactivity
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Koteja, A.; Matusik, J.; Luberda-Durnaś, K.; Szczerba, M. The Nature of Interactions and UV-Induced Response within α-Zirconium Phosphate Intercalation Compounds with Azobenzenes. Materials 2019, 12, 1436.

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