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Issue 24, 2016
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Tuning of the electronic and photophysical properties of ladder-type quaterphenyl by selective methylene-bridge fluorination

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Abstract

The photophysics (spectral positions, band shapes, fluorescence quantum yields and lifetimes) of a series of fluorinated ladder type quaterphenyls L4P and L4P-Fn (n = 2, 4, 6) depend strongly on the degree and position of fluorine, despite the fact that substitution is not performed in the rings but only in methylene-bridges. This is driven by subtle differences in the molecular orbitals (MOs) participating in the electronic transitions, and in the vibronic pattern of the S0 and S1 electronic states as revealed by (TD)DFT calculations. Solid state spectra for n = 0, 2, 4 are similar to those of solution due to small intermolecular interactions as revealed by combined X-ray and (TD)DFT analysis.

Graphical abstract: Tuning of the electronic and photophysical properties of ladder-type quaterphenyl by selective methylene-bridge fluorination

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Supplementary files

Article information


Submitted
29 Mar 2016
Accepted
22 May 2016
First published
24 May 2016

Phys. Chem. Chem. Phys., 2016,18, 16501-16508
Article type
Paper

Tuning of the electronic and photophysical properties of ladder-type quaterphenyl by selective methylene-bridge fluorination

B. Dänekamp, B. Kobin, S. Bhattacharyya, S. Hecht, B. Milián-Medina and J. Gierschner, Phys. Chem. Chem. Phys., 2016, 18, 16501
DOI: 10.1039/C6CP02045C

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