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Dispersion of Single‐Walled Carbon Nanotubes with Poly(Pyridinium Salt)s Containing Various Rigid Aromatic Moieties |
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| Authors: | Tae Soo Jo Haesook Han Pradip K Bhowmik Longzhou Ma |
| Institution: | 1. Department of Chemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154, USA;2. Harry Reid Center for Environmental Studies, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Las Vegas, NV 89154‐4003, USA |
| Abstract: | Dispersions of single‐walled carbon nanotubes (SWNTs) with several poly(pyridinium salt)s containing various aromatic diamine moieties are prepared via a non‐covalent coagulation in DMSO. The interactions between SWNTs and polymers are characterized with various spectroscopic techniques. The 1H NMR spectra suggest that strong interactions exist. The UV?Vis absorption spectra are independent of the incorporation of SWNTs. The resulting composites display high quenching efficiency in the photoluminescent properties; and transmission electron microscopy studies reveal the well‐dispersed SWNTs in the ionic polymer matrices. The enhanced thermal stability of the composites is determined by thermogravimetric analysis. The fully grown lyotropic LC properties of the poly(pyridinium salt)s are disrupted by the introduction of SWNTs. |
| Keywords: | liquid‐crystalline polymers luminescence Raman spectroscopy single‐walled carbon nanotubes UV– Vis spectroscopy |