Effect of the charge state on the photoluminescence spectra of melanin


Steady-state and time-resolved photoluminescence (PL) spectra of natural and synthetic melanin, as well as melanin composites with surfactant, sodium dodecylbenzenesulfonate, and polymethine dye, astraphloxin, have been studied. The melanin molecules having differently charged peripheral groups with terminal O atoms and OH groups mixed with the negatively charged surfactant or positively charged astraphloxin dye feature new PL spectral bands. The kinetics of PL and time-resolved emission spectra for the melanin and the composites were also investigated and discussed in terms of intermolecular complexation, nano-aggregation and formation of chargetransfer states. The studies are aiming to understand the electronic properties of various melanins, particularly natural ones.

Publication DOI: https://doi.org/10.1080/15421406.2018.1542084
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Engineering & Applied Sciences
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis Group in Molecular Crystals and Liquid Crystals on 3/6/2019, available online at: http://www.tandfonline.com/10.1080/15421406.2018.1542084
Uncontrolled Keywords: Photoluminescence,polymethine dye,melanin,CT-states,time resolved emission spectra
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Related URLs: https://www.tan ... 06.2018.1542084 (Publisher URL)
Published Date: 2019-06-03
Authors: Kostetskyi, Anton
Piryatinski, Yuri P.
Verbitsky, Anatoli B.
Lutsyk, Petro ( 0000-0002-7004-1946)
Rozhin, Oleksiy ( 0000-0003-2271-8227)



Version: Accepted Version

Access Restriction: Restricted to Repository staff only until 3 June 2020.

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