Shear alignment of fullerenes in nanotubular supramolecular complexes
Supramolecular complexes of C60 and C70 encapsulated within the cavity created by the helical superstructure of syndiotactic poly(methyl methacrylate) (s-PMMA) were aligned by elevated-temperature electrospinning. Using 13C solid-state NMR, encapsulation of C60 within the nanotubular cavity was conf...
| Main Authors: | , , , , , , |
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| Formato: | Journal article |
| Idioma: | English |
| Publicado: |
Elsevier
2015
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| _version_ | 1826306927978610688 |
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| author | Kincer, MR Choudhury, R Srinivasarao, M Beckham, H Briggs, G Porfyrakis, K Bucknall, D |
| author_facet | Kincer, MR Choudhury, R Srinivasarao, M Beckham, H Briggs, G Porfyrakis, K Bucknall, D |
| author_sort | Kincer, MR |
| collection | OXFORD |
| description | Supramolecular complexes of C60 and C70 encapsulated within the cavity created by the helical superstructure of syndiotactic poly(methyl methacrylate) (s-PMMA) were aligned by elevated-temperature electrospinning. Using 13C solid-state NMR, encapsulation of C60 within the nanotubular cavity was confirmed by downfield chemical shifts and significantly shorter spin-spin relaxation times compared to C60 physically mixed with s-PMMA. Thermal analysis revealed a melting endotherm at 180°C for the C60/s-PMMA electrospun fibers that is consistent with formation of the nanotubular supramolecular complex. Based on the syndiotactic content of the s-PMMA and the gravimetrically determined fullerene content in the electrospun fibers, 82% of the nanocavity is filled with C60, dropping to 55% filling with C70. The fibers were macroscopically aligned by electrospinning onto a split collector plate for analysis of molecular alignment. Wide-angle X-ray scattering azimuthal scans revealed high degrees of molecular-level alignment, with an order parameter of 0.70 for the C60/s-PMMA nanopods. |
| first_indexed | 2024-03-07T06:55:20Z |
| format | Journal article |
| id | oxford-uuid:fdf7103f-384f-4059-8129-362c5a3ca02a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:55:20Z |
| publishDate | 2015 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:fdf7103f-384f-4059-8129-362c5a3ca02a2022-03-27T13:32:45ZShear alignment of fullerenes in nanotubular supramolecular complexesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fdf7103f-384f-4059-8129-362c5a3ca02aEnglishSymplectic Elements at OxfordElsevier2015Kincer, MRChoudhury, RSrinivasarao, MBeckham, HBriggs, GPorfyrakis, KBucknall, DSupramolecular complexes of C60 and C70 encapsulated within the cavity created by the helical superstructure of syndiotactic poly(methyl methacrylate) (s-PMMA) were aligned by elevated-temperature electrospinning. Using 13C solid-state NMR, encapsulation of C60 within the nanotubular cavity was confirmed by downfield chemical shifts and significantly shorter spin-spin relaxation times compared to C60 physically mixed with s-PMMA. Thermal analysis revealed a melting endotherm at 180°C for the C60/s-PMMA electrospun fibers that is consistent with formation of the nanotubular supramolecular complex. Based on the syndiotactic content of the s-PMMA and the gravimetrically determined fullerene content in the electrospun fibers, 82% of the nanocavity is filled with C60, dropping to 55% filling with C70. The fibers were macroscopically aligned by electrospinning onto a split collector plate for analysis of molecular alignment. Wide-angle X-ray scattering azimuthal scans revealed high degrees of molecular-level alignment, with an order parameter of 0.70 for the C60/s-PMMA nanopods. |
| spellingShingle | Kincer, MR Choudhury, R Srinivasarao, M Beckham, H Briggs, G Porfyrakis, K Bucknall, D Shear alignment of fullerenes in nanotubular supramolecular complexes |
| title | Shear alignment of fullerenes in nanotubular supramolecular complexes |
| title_full | Shear alignment of fullerenes in nanotubular supramolecular complexes |
| title_fullStr | Shear alignment of fullerenes in nanotubular supramolecular complexes |
| title_full_unstemmed | Shear alignment of fullerenes in nanotubular supramolecular complexes |
| title_short | Shear alignment of fullerenes in nanotubular supramolecular complexes |
| title_sort | shear alignment of fullerenes in nanotubular supramolecular complexes |
| work_keys_str_mv | AT kincermr shearalignmentoffullerenesinnanotubularsupramolecularcomplexes AT choudhuryr shearalignmentoffullerenesinnanotubularsupramolecularcomplexes AT srinivasaraom shearalignmentoffullerenesinnanotubularsupramolecularcomplexes AT beckhamh shearalignmentoffullerenesinnanotubularsupramolecularcomplexes AT briggsg shearalignmentoffullerenesinnanotubularsupramolecularcomplexes AT porfyrakisk shearalignmentoffullerenesinnanotubularsupramolecularcomplexes AT bucknalld shearalignmentoffullerenesinnanotubularsupramolecularcomplexes |