TY - JOUR
T1 - Solid-State Room-Temperature Near-Infrared Photoluminescence of a Stable Organic Radical
AU - Matsuoka, Ryota
AU - Kimura, Shojiro
AU - Kusamoto, Tetsuro
N1 - Funding Information:
The authors acknowledge Dr. Hiroshi Nishihara in Tokyo university of Science, Ms. Lin Shi, and Mr. Hikaru Uchida in the University of Tokyo for the initial preparation of metaPyBTM. The present study was supported by JSPS KAKENHI Grant Numbers JP20H02759 and JP19K15579, and JST PRESTO Grant Number JPMJPR20L4. Emission spectra measurements under a magnetic field were performed at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University (Project No. 20H0029). This work was partly supported by the Nanotechnology Platform Program (Molecule and Material Synthesis) of the MEXT, Japan.
Funding Information:
The authors acknowledge Dr. Hiroshi Nishihara in Tokyo university of Science, Ms. Lin Shi, and Mr. Hikaru Uchida in the University of Tokyo for the initial preparation of metaPyBTM. The present study was supported by JSPS KAKENHI Grant Numbers JP20H02759 and JP19K15579, and JST PRESTO Grant Number JPMJPR20L4. Emission spectra measurements under a magnetic field were performed at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University (Project No. 20H0029). This work was partly supported by the Nanotechnology Platform Program (Molecule and Material Synthesis) of the MEXT, Japan.
Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021
Y1 - 2021
N2 - Luminescent organic radicals often exhibit unique emission properties when isolated in solution or dispersed in host materials. However, luminescent properties of radicals in the fully aggregated pure solid state have rarely been investigated, especially at room temperature. Herein, a luminescent stable organic radical with a 3-pyridyl moiety, the (2,4-dichloro-3-pyridyl)bis(2,4,6-trichlorophenyl)methyl radical (metaPyBTM), was synthesized and characterized. Although the electronic structures and photophysical properties in solution of metaPyBTM and its analogues are similar, metaPyBTM displays distinct near-infrared photoluminescence in the pure crystalline state at room temperature. The solid-state luminescence properties of metaPyBTM depend strongly on temperature and the degree of aggregation. An external magnetic field also modulates the emission spectrum of metaPyBTM in the moderately aggregated state.
AB - Luminescent organic radicals often exhibit unique emission properties when isolated in solution or dispersed in host materials. However, luminescent properties of radicals in the fully aggregated pure solid state have rarely been investigated, especially at room temperature. Herein, a luminescent stable organic radical with a 3-pyridyl moiety, the (2,4-dichloro-3-pyridyl)bis(2,4,6-trichlorophenyl)methyl radical (metaPyBTM), was synthesized and characterized. Although the electronic structures and photophysical properties in solution of metaPyBTM and its analogues are similar, metaPyBTM displays distinct near-infrared photoluminescence in the pure crystalline state at room temperature. The solid-state luminescence properties of metaPyBTM depend strongly on temperature and the degree of aggregation. An external magnetic field also modulates the emission spectrum of metaPyBTM in the moderately aggregated state.
KW - magnetic field
KW - near-infrared luminescence
KW - radicals
KW - solid-state luminescence
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U2 - 10.1002/cptc.202100023
DO - 10.1002/cptc.202100023
M3 - Article
AN - SCOPUS:85104252320
SN - 2367-0932
JO - ChemPhotoChem
JF - ChemPhotoChem
ER -