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|Title:||Effect of higher nonbenzertoids in optical properties of dihydropyrene-thiophene and dihydropyrene-phenylenevinylene copolymers|
|Source:||Lin, Y., Lai, Y.-H. (2009-04-01). Effect of higher nonbenzertoids in optical properties of dihydropyrene-thiophene and dihydropyrene-phenylenevinylene copolymers. Journal of Polymer Science, Part A: Polymer Chemistry 47 (7) : 1795-1803. ScholarBank@NUS Repository. https://doi.org/10.1002/pola.23279|
|Abstract:||One dihydropyrene-thiophene and a series of three dihydropyrenephenylenevinylene copolymers were synthesized in this work. The core dihydropyrene unit was shown to remain intact in the polymer backbone by 1H NMR studies. Thermal studies indicated higher stability of the dihydropyrene unit in the copolymers compared with the parent molecule, with one of the dihydropyrenephenylenevinylene copolymers exhibited a single-step onset degradation temperature at 400 °C. Extended conjugation effect in the copolymers was evident based on spectroscopic analysis despite a mismatch of macrocyclic dihydropyrene units and small conjugation partners (thiophene and phenylenevinylene). The copolymers exhibited relatively small bandgaps. All four copolymers exhibit blue light emission in photoluminescence studies. Their emission spectra are essentially identical, suggesting that their emission properties were dominated by the dihydropyrene chromophore but independent of the spacer group (thiophene or phenylenevinylene), © 2009 Wiley Periodicals, Inc.|
|Source Title:||Journal of Polymer Science, Part A: Polymer Chemistry|
|Appears in Collections:||Staff Publications|
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