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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Main Authors: Tregnago, G, Afshar, A, McDonnell, SO, Anderson, HL, Cacialli, F
Format: Journal article
Published: 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.
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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
work_keys_str_mv AT tregnagog thermallyinducedsuppressionofinterchaininteractionsindiluteaqueoussolutionsofconjugatedpolyelectrolyterotaxanesandtheiranalogues
AT afshara thermallyinducedsuppressionofinterchaininteractionsindiluteaqueoussolutionsofconjugatedpolyelectrolyterotaxanesandtheiranalogues
AT mcdonnellso thermallyinducedsuppressionofinterchaininteractionsindiluteaqueoussolutionsofconjugatedpolyelectrolyterotaxanesandtheiranalogues
AT andersonhl thermallyinducedsuppressionofinterchaininteractionsindiluteaqueoussolutionsofconjugatedpolyelectrolyterotaxanesandtheiranalogues
AT caciallif thermallyinducedsuppressionofinterchaininteractionsindiluteaqueoussolutionsofconjugatedpolyelectrolyterotaxanesandtheiranalogues