Self-Assembled Supramolecular Films Derived from Marine Deoxyribonucleic Acid (DNA)−Cationic Surfactant Complexes:  Large-Scale Preparation and Optical and Thermal Properties

Abstract

Series of polyelectrolyte−surfactant complexes, DNA−cationic surfactant complexes (cetyltrimethylammonium, cetylpyridinium, and cetylbenzyldimethylammonium), and their self-assembled bulk film materials were prepared on a large scale. Circular dichroism (CD) analysis indicated that the right-handed double helix structure of DNA was retained in these bulk film materials. TGA analysis suggested that 4 molecules of water were required to retain the B-type conformation of the DNA helix in the self-assembled bulk film materials. In addition, it revealed that DNA and the DNA−surfactant complex film materials were thermostable up to as high as 180 °C. Thermodynamical analysis indicated that these film materials were thermo-extensive over a temperature range from 100 to 148 °C. The DNA conformation in the supramolecular complex films can be reversibly tuned by changing the environmental humidity. Film formation was found to occur by self-assembly and self-organization with evaporation of solvent molecules. Various functional dyes such as laser dye, NLO dye, and photochromic dye could easily be incorporated in the self-assembled supramolecular complex films as adducts. Studies of the induced CD spectra demonstrated that 4[4-(dimethylamino)styryl]-1-dococylpyridinium (DMASDPB) could orient on the chiral nanotemplates of DNA in the self-assembled films. UV−vis analysis indicated that these film materials have high transparency from 300 to about 1000 nm. These self-assembled functional-dye-containing DNA−surfactant complex materials, with good processability for multilayer integration into large-area devices, will have promising applications in molecular optical and molecular optoelectronic fields.

Recent Advances for Flame Retardancy of Textiles Based on Phosphorus Chemistry

“…Finally, the high price of DNA with respect to standard chemical FRs is being overcome, as large scale extraction and purification processes have been developed [70].…”

Enhanced emission efficiency in organic light-emitting diodes using deoxyribonucleic acid complex as an electron blocking layer

“…This allows the formation of thin films by casting or spin coating. We have utilized the reaction 9 with cetyltrimethylammonium ͑CTMA͒ to form a DNA-CTMA complex from which thin films were produced. This process has been utilized in investigations of DNA-CTMA as an electro-optical material.…”

Optical, electro-optic and optoelectronic properties of natural and chemically modified DNAs

“…The term 'conformational gating' 21,22 was coined by Barton's group to describe this phenomenon. Figure 2 compares the electronic spectra of three different DNA À Q þ compositions 19 with that of natural DNA or DNA À Na þ , both in solution and in solid form. Although the details of their absorption spectra are not the same, their absorption positions are more or less similar.…”

“…Steckl et al 18 wrote an interesting article entitled 'DNA as an optical material.' Figures 1 and 2 compare the UV-Vis absorption spectra of natural salmon sperm DNA 16 and DNA À Q þ complexes 19 in solution and in solid films.…”