Thermally induced suppression of interchain interactions in dilute aqueous solutions of conjugated polyelectrolyte rotaxanes and their analogues
We use steady-state and nanosecond time-resolved photoluminescence spectroscopy to investigate the evolution of packing interactions in dilute solutions of a sulfonated poly(diphenylenevinylene) lithium salt and its cyclodextrin-threaded polyrotaxanes as a function of the threading ratio (TR) when i...
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Format: | Journal article |
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AIP Publishing
2017
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author | Tregnago, G Afshar, A McDonnell, SO Anderson, HL Cacialli, F |
author_facet | Tregnago, G Afshar, A McDonnell, SO Anderson, HL Cacialli, F |
author_sort | Tregnago, G |
collection | OXFORD |
description | We use steady-state and nanosecond time-resolved photoluminescence spectroscopy to investigate the evolution of packing interactions in dilute solutions of a sulfonated poly(diphenylenevinylene) lithium salt and its cyclodextrin-threaded polyrotaxanes as a function of the threading ratio (TR) when increasing the temperature from 10 to 40 °C. Contrary to the expectation of a temperature-induced increase of packing and aggregation, supported by previous Raman studies identifying a temperature-induced reduction in the inter-phenyl torsion angles, we find clear spectral (photoluminescence blue-shift and narrowing) and dynamic (shorter lifetimes and reduced weight of the long-lived components) signatures of a reduction of interchain interactions for the polyelectrolytes at higher temperatures with TR up to 1.3. |
first_indexed | 2024-03-07T06:22:34Z |
format | Journal article |
id | oxford-uuid:f32ebf23-3733-42a6-97cf-84faca25a43f |
institution | University of Oxford |
last_indexed | 2024-03-07T06:22:34Z |
publishDate | 2017 |
publisher | AIP Publishing |
record_format | dspace |
spelling | oxford-uuid:f32ebf23-3733-42a6-97cf-84faca25a43f2022-03-27T12:10:03ZThermally induced suppression of interchain interactions in dilute aqueous solutions of conjugated polyelectrolyte rotaxanes and their analoguesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f32ebf23-3733-42a6-97cf-84faca25a43fSymplectic Elements at OxfordAIP Publishing2017Tregnago, GAfshar, AMcDonnell, SOAnderson, HLCacialli, FWe use steady-state and nanosecond time-resolved photoluminescence spectroscopy to investigate the evolution of packing interactions in dilute solutions of a sulfonated poly(diphenylenevinylene) lithium salt and its cyclodextrin-threaded polyrotaxanes as a function of the threading ratio (TR) when increasing the temperature from 10 to 40 °C. Contrary to the expectation of a temperature-induced increase of packing and aggregation, supported by previous Raman studies identifying a temperature-induced reduction in the inter-phenyl torsion angles, we find clear spectral (photoluminescence blue-shift and narrowing) and dynamic (shorter lifetimes and reduced weight of the long-lived components) signatures of a reduction of interchain interactions for the polyelectrolytes at higher temperatures with TR up to 1.3. |
spellingShingle | Tregnago, G Afshar, A McDonnell, SO Anderson, HL Cacialli, F Thermally induced suppression of interchain interactions in dilute aqueous solutions of conjugated polyelectrolyte rotaxanes and their analogues |
title | Thermally induced suppression of interchain interactions in dilute aqueous solutions of conjugated polyelectrolyte rotaxanes and their analogues |
title_full | Thermally induced suppression of interchain interactions in dilute aqueous solutions of conjugated polyelectrolyte rotaxanes and their analogues |
title_fullStr | Thermally induced suppression of interchain interactions in dilute aqueous solutions of conjugated polyelectrolyte rotaxanes and their analogues |
title_full_unstemmed | Thermally induced suppression of interchain interactions in dilute aqueous solutions of conjugated polyelectrolyte rotaxanes and their analogues |
title_short | Thermally induced suppression of interchain interactions in dilute aqueous solutions of conjugated polyelectrolyte rotaxanes and their analogues |
title_sort | thermally induced suppression of interchain interactions in dilute aqueous solutions of conjugated polyelectrolyte rotaxanes and their analogues |
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