Charge–Transfer Fluorescence and Room-Temperature Phosphorescence from a Bisamide-Based Derivative

The development of organic luminescent materials with bimodal emissions of both fluorescence and room-temperature phosphorescent (RTP) remains a challenge. The investigation of the relationship between fluorescence and RTP performance is especially rare. In this work, we obtained an organic luminesc...

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Autores principales:	Chengjian Li, Chaozheng Zhuo, Jingwei Sun, Mi Ouyang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	charge-transfer photoluminescence molecular interactions Crystallography QD901-999
Acceso en línea:	https://doaj.org/article/5aa5ea4606154dd8b35067f85ba435f3
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spelling	oai:doaj.org-article:5aa5ea4606154dd8b35067f85ba435f32021-11-25T17:19:00ZCharge–Transfer Fluorescence and Room-Temperature Phosphorescence from a Bisamide-Based Derivative10.3390/cryst111113702073-4352https://doaj.org/article/5aa5ea4606154dd8b35067f85ba435f32021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1370https://doaj.org/toc/2073-4352The development of organic luminescent materials with bimodal emissions of both fluorescence and room-temperature phosphorescent (RTP) remains a challenge. The investigation of the relationship between fluorescence and RTP performance is especially rare. In this work, we obtained an organic luminescent molecule, 1,4-phenylenebis((9H-carbazol-9-yl)methanone) (PBCM), which exhibits bimodal emissions of cyan fluorescence and yellow RTP in its crystalline state through adopting an electron donor–acceptor–donor (D–A–D) structure. The charge–transfer (CT) effects in the bimodal luminescent properties of PBCM, as well as the single-crystal structures and thermal properties, were investigated. It was found that the CT effect in the singlet states effectively reduces the ∆E<sub>st</sub> and promotes the ISC processes, resulting in an efficient phosphorescence of PBCM at room temperature. In addition, many strong intermolecular interactions are formed between the donor and acceptor parts of adjacent molecules, leading to the rigid configurations and compact packing of molecules in crystals, which was also confirmed to facilitate the efficient bimodal emissions of PBCM.Chengjian LiChaozheng ZhuoJingwei SunMi OuyangMDPI AGarticlecharge-transferphotoluminescencemolecular interactionsCrystallographyQD901-999ENCrystals, Vol 11, Iss 1370, p 1370 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	charge-transfer photoluminescence molecular interactions Crystallography QD901-999
spellingShingle	charge-transfer photoluminescence molecular interactions Crystallography QD901-999 Chengjian Li Chaozheng Zhuo Jingwei Sun Mi Ouyang Charge–Transfer Fluorescence and Room-Temperature Phosphorescence from a Bisamide-Based Derivative
description	The development of organic luminescent materials with bimodal emissions of both fluorescence and room-temperature phosphorescent (RTP) remains a challenge. The investigation of the relationship between fluorescence and RTP performance is especially rare. In this work, we obtained an organic luminescent molecule, 1,4-phenylenebis((9H-carbazol-9-yl)methanone) (PBCM), which exhibits bimodal emissions of cyan fluorescence and yellow RTP in its crystalline state through adopting an electron donor–acceptor–donor (D–A–D) structure. The charge–transfer (CT) effects in the bimodal luminescent properties of PBCM, as well as the single-crystal structures and thermal properties, were investigated. It was found that the CT effect in the singlet states effectively reduces the ∆E<sub>st</sub> and promotes the ISC processes, resulting in an efficient phosphorescence of PBCM at room temperature. In addition, many strong intermolecular interactions are formed between the donor and acceptor parts of adjacent molecules, leading to the rigid configurations and compact packing of molecules in crystals, which was also confirmed to facilitate the efficient bimodal emissions of PBCM.
format	article
author	Chengjian Li Chaozheng Zhuo Jingwei Sun Mi Ouyang
author_facet	Chengjian Li Chaozheng Zhuo Jingwei Sun Mi Ouyang
author_sort	Chengjian Li
title	Charge–Transfer Fluorescence and Room-Temperature Phosphorescence from a Bisamide-Based Derivative
title_short	Charge–Transfer Fluorescence and Room-Temperature Phosphorescence from a Bisamide-Based Derivative
title_full	Charge–Transfer Fluorescence and Room-Temperature Phosphorescence from a Bisamide-Based Derivative
title_fullStr	Charge–Transfer Fluorescence and Room-Temperature Phosphorescence from a Bisamide-Based Derivative
title_full_unstemmed	Charge–Transfer Fluorescence and Room-Temperature Phosphorescence from a Bisamide-Based Derivative
title_sort	charge–transfer fluorescence and room-temperature phosphorescence from a bisamide-based derivative
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5aa5ea4606154dd8b35067f85ba435f3
work_keys_str_mv	AT chengjianli chargetransferfluorescenceandroomtemperaturephosphorescencefromabisamidebasedderivative AT chaozhengzhuo chargetransferfluorescenceandroomtemperaturephosphorescencefromabisamidebasedderivative AT jingweisun chargetransferfluorescenceandroomtemperaturephosphorescencefromabisamidebasedderivative AT miouyang chargetransferfluorescenceandroomtemperaturephosphorescencefromabisamidebasedderivative
_version_	1718412531189415936

Charge–Transfer Fluorescence and Room-Temperature Phosphorescence from a Bisamide-Based Derivative

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