The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.
Photoinduced Charge Shifts and Electron Transfer in Viologen–Tetraphenylborate Complexes: Push–Pull Character of the Exciplex
Abstract
Viologen-tetraarylborate ion-pair complexes were prepared and investigated by steady-state and time-resolved spectroscopic techniques such as fluorescence and femtosecond transient absorption. The results highlight a charge transfer transition that leads to changes in the viologen structure in the excited singlet state. Femtosecond transient absorption reveals the formation of excited-state absorption and stimulated emission bands assigned to the planar (k obs 12 s -1 ) and twisted (k obs ∼ 10 10 s -1 ) structures between two pyridinium groups in the viologen ion. An efficient photoinduced electron transfer from the tetraphenylborate anionic moiety to the viologen dication was observed less than 1 μs after excitation. This is a consequence of the push-pull character of the electron donor twisted viologen structure, which helps formation of the borate triplet state. The borate triplet state is deactivated further via a second electron transfer process, generating viologen cation radical (V •+ ).
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In the citing paper
“This property often derives from a photocatalyzed electron transfer reaction from the borate anion to the viologen dication.”
From Inverse photochromism in viologen–tetraarylborate ion-pair complexes: optical write/microwave erase switching in polymer matrices (2022) · cites this paper as [7]
In the citing paper
“After excitation in the charge transfer band of the complex, the singlet excited state is populated and the formation and/or deactivation (e.g. fluorescence process) of the PSC state may be followed by ultrafast transient absorption experiments.2,7,22–24”
From Inverse photochromism in viologen–tetraarylborate ion-pair complexes: optical write/microwave erase switching in polymer matrices (2022) · cites this paper as [7]
In the citing paper
“This same phenyl radical adduct was previously characterized by Santos and co-workers for 1a:2a and 1b:2a compounds.7”
From Inverse photochromism in viologen–tetraarylborate ion-pair complexes: optical write/microwave erase switching in polymer matrices (2022) · cites this paper as [7]
In the citing paper
“ET to the FCS is facile when the PSC singlet excited state has enough energy to form a singlet radical pair state (1FCS*) that may evolve to a triplet radical pair state (3FCS*) by intersystem crossing.2,7,22–24”
From Inverse photochromism in viologen–tetraarylborate ion-pair complexes: optical write/microwave erase switching in polymer matrices (2022) · cites this paper as [7]
In the citing paper
“After irradiation of the complex in solution, the original complexed structure is lost, producing triphenyl borane and other products.7”
From Inverse photochromism in viologen–tetraarylborate ion-pair complexes: optical write/microwave erase switching in polymer matrices (2022) · cites this paper as [7]
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Metadata
- Authors
- Santos, W. G., Budkina, D. S., Deflon, V. M., Tarnovsky, A. N., Cardoso, D. R., & Forbes, M. D. E.
- Affiliations
- Bowling Green State University (US)
- Universidade de São Paulo (BR)
- Corresponding author
- Cardoso, Daniel R.
- Forbes, Malcolm D. E.
- ORCID
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-05-30
- Volume
- 139
- Issue
- 23
- Pages
- 7681-7684
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2615306269
- Cited by
- 58
- References
- 30
- Citations by year
- 2026: 5 · 2025: 9 · 2024: 5 · 2023: 8 · 2022: 2 · 2021: 7 · 2020: 2 · 2019: 14 · 2018: 4 · 2017: 2
- FWCI
- 4.43
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Division of Chemistry (CHE-0923360, CHE-1464817)
- Funda??o de Amparo ? Pesquisa do Estado de S?o Paulo (2011/5155-7, 2012/19823-4, 2015/13756-1)
- Division of Materials Research (DMR-1006761)
- Topics
- Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
- Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
- Physical Sciences › Chemistry › Organic Chemistry › Organoboron and organosilicon chemistry
- Keywords
- viologen, tetraphenylborate, photoinduced electron transfer, charge transfer, exciplex, excited-state absorption, stimulated emission, twisted intramolecular charge transfer, radical cations, ion-pair complex, femtosecond transient absorption, fluorescence
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