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Kobin B, Behren S, Braun-Cula B, et al. Photochemical Degradation of Various Bridge-Substituted Fluorene-Based Materials. J Phys Chem A. 2016;120(28):5474-80doi: 10.1021/acs.jpca.6b02127.
Kobin, B., Behren, S., Braun-Cula, B., & Hecht, S. (2016). Photochemical Degradation of Various Bridge-Substituted Fluorene-Based Materials. The journal of physical chemistry. A, 120(28), 5474-80. https://doi.org/10.1021/acs.jpca.6b02127
Kobin, Björn, et al. "Photochemical Degradation of Various Bridge-Substituted Fluorene-Based Materials." The journal of physical chemistry. A vol. 120,28 (2016): 5474-80. doi: https://doi.org/10.1021/acs.jpca.6b02127
Kobin B, Behren S, Braun-Cula B, Hecht S. Photochemical Degradation of Various Bridge-Substituted Fluorene-Based Materials. J Phys Chem A. 2016 Jul 21;120(28):5474-80. doi: 10.1021/acs.jpca.6b02127. Epub 2016 Jul 12. PMID: 27404657.
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J Phys Chem A. 2016 Jul 21;120(28):5474-80. doi: 10.1021/acs.jpca.6b02127. Epub 2016 Jul 12.

Photochemical Degradation of Various Bridge-Substituted Fluorene-Based Materials.

The journal of physical chemistry. A

Björn Kobin, Sandra Behren, Beatrice Braun-Cula, Stefan Hecht

Affiliations

  1. Department of Chemistry & IRIS Adlershof, Humboldt-Universität zu Berlin , 12489 Berlin, Germany.

PMID: 27404657 DOI: 10.1021/acs.jpca.6b02127

Abstract

Photochemical degradation is an important issue to be overcome in advancing the lifetime of fluorene-containing conjugated polymers. In order to optimize the inertness of the materials, a quantitative measure for the efficiency of degradation is needed. Here, we introduce a method to measure a relative quantum yield of the photochemical degradation by monitoring the kinetics of the process by means of UV/vis spectroscopy and liquid chromatography (LC) techniques. This method is employed to a set of differently substituted 2,7-diphenylfluorenes, serving as model compounds for polyfluorene materials. Our measurements show that the quantum yield changes by orders of magnitude upon varying the bridge substituents and that altered kinetics indicate changing degradation mechanisms.

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