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Title: Interaction of photosensitive surfactant with DNA and poly acrylic acid

Abstract

In this paper, we investigate interactions and phase transitions in polyelectrolyte-surfactant complexes formed between a cationic azobenzene-containing surfactant and two types of polyelectrolytes: natural (DNA) or synthetic (PAA: poly acrylic acid). The construction of a phase diagram allowed distancing between four major phases: extended coil conformation, colloidally stable compacted globules, colloidal instability range, and surfactant-stabilized compact state. Investigation on the complexes’ properties in different phases and under irradiation with UV light provides information about the role of the surfactant's hydrophobic trans isomers both in the formation and destruction of DNA and PAA globules as well as in their colloidal stabilization. The trans isomer shows much stronger affinity to the polyelectrolytes than the hydrophilic cis counterpart. There is no need for complete compensation of the polyelectrolyte charges to reach the complete compaction. On contrary to the findings previously reported in the literature, we demonstrate – for the first time – complete polyelectrolyte compaction which occurs already at 20% of DNA (and at 50% of PAA) charge compensation. The trans isomer plays the main role in the compaction. The aggregation between azobenzene units in the photosensitive surfactant is a driving force of this process. The decompaction can be realized during UV light irradiation and is stronglymore » influenced by the interplay between surfactant-surfactant and surfactant-DNA interactions in the compacted globules.« less

Authors:
; ; ;  [1]; ; ; ;  [2]
  1. Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam (Germany)
  2. Physical Chemistry, Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam (Germany)
Publication Date:
OSTI Identifier:
22255196
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 140; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ACRYLIC ACID; DNA; INTERACTIONS; IRRADIATION; ISOMERS; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; STABILIZATION; SURFACTANTS

Citation Formats

Zakrevskyy, Yuriy, Paasche, Jens, Lomadze, Nino, Santer, Svetlana, Cywinski, Piotr, Cywinska, Magdalena, Reich, Oliver, and Löhmannsröben, Hans-Gerd. Interaction of photosensitive surfactant with DNA and poly acrylic acid. United States: N. p., 2014. Web. doi:10.1063/1.4862679.
Zakrevskyy, Yuriy, Paasche, Jens, Lomadze, Nino, Santer, Svetlana, Cywinski, Piotr, Cywinska, Magdalena, Reich, Oliver, & Löhmannsröben, Hans-Gerd. Interaction of photosensitive surfactant with DNA and poly acrylic acid. United States. https://doi.org/10.1063/1.4862679
Zakrevskyy, Yuriy, Paasche, Jens, Lomadze, Nino, Santer, Svetlana, Cywinski, Piotr, Cywinska, Magdalena, Reich, Oliver, and Löhmannsröben, Hans-Gerd. 2014. "Interaction of photosensitive surfactant with DNA and poly acrylic acid". United States. https://doi.org/10.1063/1.4862679.
@article{osti_22255196,
title = {Interaction of photosensitive surfactant with DNA and poly acrylic acid},
author = {Zakrevskyy, Yuriy and Paasche, Jens and Lomadze, Nino and Santer, Svetlana and Cywinski, Piotr and Cywinska, Magdalena and Reich, Oliver and Löhmannsröben, Hans-Gerd},
abstractNote = {In this paper, we investigate interactions and phase transitions in polyelectrolyte-surfactant complexes formed between a cationic azobenzene-containing surfactant and two types of polyelectrolytes: natural (DNA) or synthetic (PAA: poly acrylic acid). The construction of a phase diagram allowed distancing between four major phases: extended coil conformation, colloidally stable compacted globules, colloidal instability range, and surfactant-stabilized compact state. Investigation on the complexes’ properties in different phases and under irradiation with UV light provides information about the role of the surfactant's hydrophobic trans isomers both in the formation and destruction of DNA and PAA globules as well as in their colloidal stabilization. The trans isomer shows much stronger affinity to the polyelectrolytes than the hydrophilic cis counterpart. There is no need for complete compensation of the polyelectrolyte charges to reach the complete compaction. On contrary to the findings previously reported in the literature, we demonstrate – for the first time – complete polyelectrolyte compaction which occurs already at 20% of DNA (and at 50% of PAA) charge compensation. The trans isomer plays the main role in the compaction. The aggregation between azobenzene units in the photosensitive surfactant is a driving force of this process. The decompaction can be realized during UV light irradiation and is strongly influenced by the interplay between surfactant-surfactant and surfactant-DNA interactions in the compacted globules.},
doi = {10.1063/1.4862679},
url = {https://www.osti.gov/biblio/22255196}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 4,
volume = 140,
place = {United States},
year = {Tue Jan 28 00:00:00 EST 2014},
month = {Tue Jan 28 00:00:00 EST 2014}
}