Hydrogel-Embedded Model Photocatalytic System Investigated by Raman and IR Spectroscopy Assisted by Density Functional Theory Calculations and Two-Dimensional Correlation Analysis
Geitner R, Goetz S, Stach R, Siegmann M, Krebs P, Zechel S, Schreyer K, Winter A, Hager MD, Schubert US, Gräfe S, Dietzek B, Mizaikoff B, Schmitt M, Popp J (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 122
Pages Range: 2677-2687
Journal Issue: 10
Abstract
The presented study reports the synthesis and the vibrational spectroscopic characterization of different matrix-embedded model photocatalysts. The goal of the study is to investigate the interaction of a polymer matrix with photosensitizing dyes and metal complexes for potential future photocatalytic applications. The synthesis focuses on a new rhodamine B derivate and a Pt(II) terpyridine complex, which both contain a polymerizable methacrylate moiety and an acid labile acylhydrazone group. The methacrylate moieties are afterward utilized to synthesize functional model hydrogels mainly consisting of poly(ethylene glycol) methacrylate units. The pH-dependent and temperature-dependent behavior of the hydrogels is investigated by means of Raman and IR spectroscopy assisted by density functional theory calculations and two-dimensional correlation spectroscopy. The spectroscopic results reveal that the Pt(II) terpyridine complex can be released from the polymer matrix by cleaving the C=N bond in an acid environment. The same behavior could not be observed in the case of the rhodamine B dye although it features a comparable C=N bond. The temperature-dependent study shows that the water evaporation has a significant influence neither on the molecular structure of the hydrogel nor on the model photocatalytic moieties.
Involved external institutions
Germany (DE)How to cite
APA:
Geitner, R., Goetz, S., Stach, R., Siegmann, M., Krebs, P., Zechel, S.,... Popp, J. (2018). Hydrogel-Embedded Model Photocatalytic System Investigated by Raman and IR Spectroscopy Assisted by Density Functional Theory Calculations and Two-Dimensional Correlation Analysis. Journal of Physical Chemistry A, 122(10), 2677-2687. https://doi.org/10.1021/acs.jpca.7b12648
MLA:
Geitner, Robert, et al. "Hydrogel-Embedded Model Photocatalytic System Investigated by Raman and IR Spectroscopy Assisted by Density Functional Theory Calculations and Two-Dimensional Correlation Analysis." Journal of Physical Chemistry A 122.10 (2018): 2677-2687.
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