Thymine- and Adenine-Functionalized Polystyrene Form Self-Assembled Structures through Multiple Complementary Hydrogen Bonds

Abstract

Abstract:In this study, we investigated the self-assembly of two homopolymers of the same molecular weight, but containing complementary nucleobases. After employing nitroxide-mediated radical polymerization to synthesize poly(vinylbenzyl chloride), we converted the polymer into poly(vinylbenzyl azide) through a reaction with NaN 3 and then performed click chemistry with propargyl thymine and propargyl adenine to yield the homopolymers, poly(vinylbenzyl triazolylmethyl methylthymine) (PVBT) and poly(vinylbenzyl triazolylmethyl methyladenine) (PVBA), respectively. This PVBT/PVBA blend system exhibited a single glass transition temperature over the entire range of compositions, indicative of a miscible phase arising from the formation of multiple strong complementary hydrogen bonds between the thymine and adenine groups of PVBT and PVBA, respectively; Fourier transform infrared and 1 H nuclear magnetic resonance spectroscopy confirmed the presence of these noncovalent interactions. In addition, dynamic rheology, dynamic light scattering and transmission electron microscopy provided evidence for the formation of supramolecular network structures in these binary PVBT/PVBA blend systems.

Miscibility and Hydrogen Bonding in Blends of Poly(4-vinylphenol)/Poly(vinyl methyl ketone)

“…, attributed to an associated carbonyl, quantitative analysis is relatively complex in this region. In spite of this fact, we attempted to determine the fraction of free and associated carbonyl using adequate curve fitting by the following equation [23][24][25]:…”

Change of Characterization and Film Morphology Based on Acrylic Pressure Sensitive Adhesives by Hydrophilic Derivative Ratio

“…The shoulder peak was identified at 1706 cm −1 from Acryl-10 to Acryl-40 because—as mentioned above—the packing characteristics between chains increased due to the flexible polymer chain. The more tightly packed chains facilitated the interaction between the O–H and C=O group, increasing the ratio of hydrogen bonding between the chains [ 32 ].…”

Mesoporous TiO2Thin Film Formed From a Bioinspired Supramolecular Assembly

“…In previous studies, we reported that the T‐functionalized homopolymer poly(4‐vinylbenzyl triazolylmethyl methylthymine) (PVBT) can form stable micelles through multiple hydrogen bonding in DMF solution; a selective solvent, namely water, led to the formation of core/shell‐structured micelles. This simple method can also be applied to form micelles for templates to prepare porous materials.…”

“…Figure S1 presents a dynamic light scattering (DLS) analysis of the PVBT homopolymer in DMF/H 2 O. DMF is a good solvent for PVBT, while H 2 O is a poor solvent . The micelle solution was prepared through very slow dropwise addition of H 2 O to a solution of PVBT in DMF.…”