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Electrostatic complex of didodecyldimethylammonium and DNA: Langmuir monolayer, Langmuir–Blodgett film and dye recognition at air/water interface

Hou, Xueliang, Sun, Lu, Xu, Miao, Wu, Lixin and Shen, Jiacong 2004, Electrostatic complex of didodecyldimethylammonium and DNA: Langmuir monolayer, Langmuir–Blodgett film and dye recognition at air/water interface, Colloids and surfaces B : biointerfaces, vol. 33, no. 3-4, pp. 157-163, doi: 10.1016/j.colsurfb.2003.10.001.

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Title Electrostatic complex of didodecyldimethylammonium and DNA: Langmuir monolayer, Langmuir–Blodgett film and dye recognition at air/water interface
Author(s) Hou, Xueliang
Sun, LuORCID iD for Sun, Lu orcid.org/0000-0003-2999-1250
Xu, Miao
Wu, Lixin
Shen, Jiacong
Journal name Colloids and surfaces B : biointerfaces
Volume number 33
Issue number 3-4
Start page 157
End page 163
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, Netherlands
Publication date 2004-02
ISSN 0927-7765
Summary DNA–didodecyldimethylammonium (DNA–DDDA) electrostatic complex was prepared and characterized through Fourier transformation infrared (FT-IR), 1H NMR and circular dichroism (CD) spectroscopy. When the dye molecule aqueous solutions were used as the subphase, the interaction between three dye molecules, acridine orange (AO), ethidium bromide (EB) and 5,10,15,20-tetrakis(4-N-methylpyridyl)porphine tetra(p-toluenesulfonate) (TMPyP) and the complex at air/solution interface were investigated through the surface pressure–area (π–A) isotherms, Brewster angle microscopy and UV-Vis spectroscopy, respectively. Our investigation indicates that the interaction capabilities of the three dyes to DNA–DDDA complex are different and present an order of TMPyP>AO>EB. For the interaction forms, we believe that TMPyP intercalates into the double helix of DNA, and AO adsorbs onto the surface of the DNA. As for EB, the measured signal is too weak to give a definite interaction form in the present experiment.
Language eng
DOI 10.1016/j.colsurfb.2003.10.001
Field of Research 060101 Analytical Biochemistry
HERDC Research category C1.1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30026253

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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