Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Helical self-assembly-induced singlet-triplet emissive switching in a mechanically sensitive system
Show others and affiliations
2017 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 139, no 2, 785-791 p.Article in journal (Refereed) Published
Abstract [en]

In nanoscience, chirality has shown a significant ability to tune materials' electronic properties, whereas imposing macrochirality into the regulation of singlet-triplet features of organic optoelectronics remains a challenging research topic. Since the tuning for singlet and triplet excited-state properties in a single π-functional molecule connects to its multicolor luminescent application and potential improvement of internal quantum efficiency, we here report that supramolecular chirality can be employed to toggle the singlet and triplet emissions in a welldesigned asterisk-shaped molecule. Employing a hexathiobenzene-based single luminophore as a prototype and functionalizing it with chiral α-lipoiate side groups, we find that helical nanoarchitectures can accordingly form in mixed DMF/H20 solution. On this basis, switching between fluorescence and phosphorescence of the material can be realized upon helical self-assembly and dissociation. Such a behavior can be attributed to a helical-conformation-dependent manipulation of the intersystem crossing. Furthermore, reversible mechanoluminescence of the corresponding solid sample was also observed to rely on an analogous molecular self-assembly alternation. These results can probably provide new visions for the development of next-generation supramolecular chiral functional materials.

Place, publisher, year, edition, pages
American Chemical Society , 2017. Vol. 139, no 2, 785-791 p.
Keyword [en]
Chirality, Electronic properties, Excited states, Functional materials, Molecules, Quantum theory, Stereochemistry, Supramolecular chemistry, Excited-state properties, Functional molecules, Helical conformation, Inter-system crossings, Internal quantum efficiency, Molecular self assembly, Organic optoelectronics, Supramolecular chirality, Self assembly, behavior, dissociation, fluorescence, phosphorescence, vision
National Category
Chemical Sciences Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-216555DOI: 10.1021/jacs.6b10550ISI: 000392459300037Scopus ID: 2-s2.0-85018936993OAI: oai:DiVA.org:kth-216555DiVA: diva2:1155665
Note

QC 20171108

Available from: 2017-11-08 Created: 2017-11-08 Last updated: 2017-11-08Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Authority records BETA

Li, XinÅgren, Hans

Search in DiVA

By author/editor
Li, XinÅgren, Hans
By organisation
Theoretical Chemistry and Biology
In the same journal
Journal of the American Chemical Society
Chemical SciencesChemical Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 24 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf