Search: onr:"swepub:oai:DiVA.org:liu-200365" >
The interplay of in...
The interplay of intersystem crossing and internal conversion in quadrupolar tetraarylpyrrolo[3,2-b]pyrroles
-
- Gorski, Krzysztof (author)
- Polish Acad Sci, Poland
-
- Kusy, Damian (author)
- Polish Acad Sci, Poland
-
- Ozaki, Shuhei (author)
- Natl Inst Adv Ind Sci & Technol, Japan; Kwansei Gakuin Univ, Japan
-
show more...
-
- Banasiewicz, Marzena (author)
- Polish Acad Sci, Poland
-
- Valiev, Rashid (author)
- Univ Helsinki, Finland
-
- Sahoo, Smruti Ranjan (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
-
- Kamada, Kenji (author)
- Natl Inst Adv Ind Sci & Technol, Japan; Kwansei Gakuin Univ, Japan
-
- Baryshnikov, Glib (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Bohdan Khmelnytsky Natl Univ, Ukraine
-
- Gryko, Daniel T. (author)
- Polish Acad Sci, Poland
-
show less...
-
(creator_code:org_t)
- 2024
- 2024
- English.
-
In: Journal of Materials Chemistry C. - : ROYAL SOC CHEMISTRY. - 2050-7526 .- 2050-7534.
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- Adding nitro groups to aromatic compounds usually quenches their fluorescence via intersystem crossing (ISC) or internal conversion (IC). Herein, we investigated centrosymmetric 1,4-dihydropyrrolo[3,2-b]pyrroles linked to variously substituted nitro-heteroaryls. A 1,4-orientation of the nitro substituent versus the electron rich 1,4-dihydropyrrolo[3,2-b]pyrrole core invokes a strong fluorescence in non-polar solvents and intense two-photon absorption while a 1,3-orientation of push-pull substituents results in a dramatic hypsochromic shift of absorption, weak, bathochromically shifted emission and weak two-photon absorption. The combined experimental and computational study indicates that the primary responsible factors are: (1) the difference in electron density distribution in the LUMO; (2) the difference in mu 10. IC is a dominant mechanism of non-radiative dissipation of energy in all these dyes but as long as the distribution of electron density within the HOMO and LUMO is delocalized on the 1,4-dihydropyrrolo[3,2-b]pyrrole core as well as on the nitroaromatic moieties its rate is slower than the fluorescence rate in non-polar solvents.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database