Abstract
In this study, we prepared bio-inspired multiple-hydrogen-bonded blends of a thymine (T)-functionalized PTC-T conjugated polymer, synthesized through Suzuki coupling polymerization, and an adenine (A)-functionalized polystyrene (PVBA) homopolymer, synthesized through free radical polymerization, in each case applying also alkylene–azide click reactions. The resulting PTC-T/PVBA blends displayed a single glass transition temperature at all blend compositions (as determined using differential scanning calorimetry), suggesting that the miscibility arose because of the strong multiple hydrogen bonding between the A and T groups of the PVBA and PTC-T components, respectively. 1H NMR and FTIR spectroscopy provided evidence for such A–T binary hydrogen bonding in the PTC-T/PVBA miscible domains, both in solution and in the solid state. Furthermore, the incorporation of PVBA into PTC-T affected the photophysical properties of the luminescent film: the physically crosslinked structure formed from the multiple hydrogen bonding interactions improved the quantum yield through phase-miscible behavior.
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