Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer−π-Dimer Equilibrium

Kohzuma, Takuto; Sugita, Kei; Tani, Yosuke; Metzelaars, Marvin; Kubo, Takashi

doi:https://doi.org/10.1021/acs.orglett.5c01541

Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer−π-Dimer Equilibrium

Kohzuma, Takuto; Sugita, Kei; Tani, Yosuke et al.

Organic Letters, 2025, 27(23), 6019-6024

Number of Access:21（2025-09-04 14:41 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/102455

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Title	Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer−π-Dimer Equilibrium
Creator	CreatorName Kohzuma, Takuto
	CreatorName Sugita, Kei
	NRID 1000000769383 1000000769383 ORCID 0000-0003-1326-5457 0000-0003-1326-5457 researchmap permalink tani-y tani-y Scopus Author ID 55452146800 55452146800 CreatorName Tani, Yosuke
	CreatorName Metzelaars, Marvin
	NRID 1000060324745 1000060324745 ORCID 0000-0001-6809-7396 0000-0001-6809-7396 researchmap permalink read0076571 read0076571 Scopus Author ID 55576439300 55576439300 CreatorName Kubo, Takashi
Description	This document is the Accepted Manuscript version of a Published Work that appeared in final form in Organic Letters, © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.orglett.5c01541
Description	Kohzuma T., Sugita K., Tani Y., et al. Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer−π-Dimer Equilibrium. Organic Letters 27, 6019 (2025); https://doi.org/10.1021/acs.orglett.5c01541.
Abstract	Open-shell organic radicals exhibit exceptional photophysical properties due to their unique electronic structures. Herein, we report the 2,5,8-tribromophenalenyl radical (Br-PLY) as a stable, emissive phenalenyl derivative. Br-PLY shows a monomer−π-dimer equilibrium in solution and emits light from its monomeric radical state. Its high air stability (t1/2 ≈ 40 h) and long-lived emission (τ = 252 ns) demonstrate the potential of phenalenyl radicals as promising luminescent materials beyond trityl-based systems.
Publisher	American Chemical Society
Source Title	Organic Letters
Volume (Issue)	27(23)
Page	6019-6024
Date of Issued	2025-06-13
Language	English
Handle URL	https://hdl.handle.net/11094/102455
PISSN	15237060
eISSN	15237052
Relation.isVersionOf	DOI (Publisher Version) https://doi.org/10.1021/acs.orglett.5c01541
Access Rights	embargoed access
CopyRight	The full-text file will be made open to the public on 13 June 2026 in accordance with the publisher's policy.
oaire:version	Accepted Manuscript
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Organic Letters. 2025, 27(23), p. 6019-6024
DC.title	Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer−π-Dimer Equilibrium
DC.creator	Kohzuma, Takuto
	Sugita, Kei
	Tani, Yosuke
	Metzelaars, Marvin
	Kubo, Takashi
DC.publisher	American Chemical Society
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2025-06-13
DC.identifier	https://doi.org/10.1021/acs.orglett.5c01541
DC.description	This document is the Accepted Manuscript version of a Published Work that appeared in final form in Organic Letters, © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.orglett.5c01541
DC.description	Kohzuma T., Sugita K., Tani Y., et al. Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer−π-Dimer Equilibrium. Organic Letters 27, 6019 (2025); https://doi.org/10.1021/acs.orglett.5c01541.
DCTERMS.abstract	Open-shell organic radicals exhibit exceptional photophysical properties due to their unique electronic structures. Herein, we report the 2,5,8-tribromophenalenyl radical (Br-PLY) as a stable, emissive phenalenyl derivative. Br-PLY shows a monomer−π-dimer equilibrium in solution and emits light from its monomeric radical state. Its high air stability (t1/2 ≈ 40 h) and long-lived emission (τ = 252 ns) demonstrate the potential of phenalenyl radicals as promising luminescent materials beyond trityl-based systems.
DC.rights	The full-text file will be made open to the public on 13 June 2026 in accordance with the publisher's policy.
DC.format	102455
citation_title	Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer−π-Dimer Equilibrium
citation_author	Kohzuma, Takuto
	Sugita, Kei
	Tani, Yosuke
	Metzelaars, Marvin
	Kubo, Takashi
citation_publisher	American Chemical Society
citation_language	English
citation_date	2025-06-13
citation_journal_title	Organic Letters
citation_volume	27
citation_issue	23
citation_firstpage	6019
citation_lastpage	6024
citation_doi	https://doi.org/10.1021/acs.orglett.5c01541
citation_public_url	https://hdl.handle.net/11094/102455

Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer−π-Dimer Equilibrium

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