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Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids

A series of unsymmetrical 1,3-diaryl-β-diketones 1–6 displaying molecular conformation-dependent fluorescence quantum yields have been synthesized. Crystals with planar molecular conformation such as 1, 2, 3 and 4 are highly fluorescent (φ(f): 39–53%), and the one holding slightly twisted conformati...

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Detalles Bibliográficos
Autores principales: Cheng, Xiao, Li, Feng, Han, Shenghua, Zhang, Yufei, Jiao, Chuanjun, Wei, Jinbei, Ye, Kaiqi, Wang, Yue, Zhang, Hongyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4360484/
https://www.ncbi.nlm.nih.gov/pubmed/25771808
http://dx.doi.org/10.1038/srep09140
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author Cheng, Xiao
Li, Feng
Han, Shenghua
Zhang, Yufei
Jiao, Chuanjun
Wei, Jinbei
Ye, Kaiqi
Wang, Yue
Zhang, Hongyu
author_facet Cheng, Xiao
Li, Feng
Han, Shenghua
Zhang, Yufei
Jiao, Chuanjun
Wei, Jinbei
Ye, Kaiqi
Wang, Yue
Zhang, Hongyu
author_sort Cheng, Xiao
collection PubMed
description A series of unsymmetrical 1,3-diaryl-β-diketones 1–6 displaying molecular conformation-dependent fluorescence quantum yields have been synthesized. Crystals with planar molecular conformation such as 1, 2, 3 and 4 are highly fluorescent (φ(f): 39–53%), and the one holding slightly twisted conformation (5) is moderately luminescent (φ(f) = 17%), while crystal 6 possessing heavily bent structure is completely nonluminous (φ(f) ~ 0). The distinct fluorescence efficiencies are ascribed to their different molecular conformations, since all the crystals hold the same crystal system, space group and crystal packing structures. Additionally, the fluorescent crystals 1–5 display low threshold amplified spontaneous emission (ASE) with small full widths at half-maximum (FWHM: 3–7 nm), indicating their potential as candidates for organic crystal lasing devices.
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spelling pubmed-43604842015-03-19 Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids Cheng, Xiao Li, Feng Han, Shenghua Zhang, Yufei Jiao, Chuanjun Wei, Jinbei Ye, Kaiqi Wang, Yue Zhang, Hongyu Sci Rep Article A series of unsymmetrical 1,3-diaryl-β-diketones 1–6 displaying molecular conformation-dependent fluorescence quantum yields have been synthesized. Crystals with planar molecular conformation such as 1, 2, 3 and 4 are highly fluorescent (φ(f): 39–53%), and the one holding slightly twisted conformation (5) is moderately luminescent (φ(f) = 17%), while crystal 6 possessing heavily bent structure is completely nonluminous (φ(f) ~ 0). The distinct fluorescence efficiencies are ascribed to their different molecular conformations, since all the crystals hold the same crystal system, space group and crystal packing structures. Additionally, the fluorescent crystals 1–5 display low threshold amplified spontaneous emission (ASE) with small full widths at half-maximum (FWHM: 3–7 nm), indicating their potential as candidates for organic crystal lasing devices. Nature Publishing Group 2015-03-16 /pmc/articles/PMC4360484/ /pubmed/25771808 http://dx.doi.org/10.1038/srep09140 Text en Copyright © 2015, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Cheng, Xiao
Li, Feng
Han, Shenghua
Zhang, Yufei
Jiao, Chuanjun
Wei, Jinbei
Ye, Kaiqi
Wang, Yue
Zhang, Hongyu
Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids
title Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids
title_full Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids
title_fullStr Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids
title_full_unstemmed Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids
title_short Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids
title_sort emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: a model perfectly disclosing the effect of molecular conformation on luminescence of organic solids
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4360484/
https://www.ncbi.nlm.nih.gov/pubmed/25771808
http://dx.doi.org/10.1038/srep09140
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