Effect of the charge state on the photoluminescence spectra of melanin

Anton Kostetskyi, Yuri P. Piryatinski, Anatoli B. Verbitsky, Petro Lutsyk, Oleksiy Rozhin

Research output: Contribution to journalConference article

Abstract

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.
Original languageEnglish
Pages (from-to)41-54
Number of pages14
JournalMolecular Crystals and Liquid Crystals
Volume671
Issue number1
DOIs
Publication statusPublished - 3 Jun 2019
Event1th International Conference on Electronic Processes in Organic and Inorganic Materials (ICEPOM-11) - Ivano-Frankivsk, Ukraine
Duration: 21 May 201825 May 2018

Bibliographical note

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

Keywords

  • CT-states
  • Photoluminescence
  • melanin
  • polymethine dye
  • time resolved emission spectra

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