- Phenothiazine Scope: Steric Strain Induced Planarization and Excimer Formation
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Phenothiazine derivatives based on the 10-phenyl-10H-phenothiazine (NAS) chromophore, namely 7-phenyl-7H-benzo[c]phenothiazine (NAS-1) and 12-phenyl-12H-benzo[a]phenothiazine (NAS-2), were designed and synthesized. NAS-1 and NAS-2 are constitutional isomers with different steric strains imposed on the phenothiazine core moiety. In solution, the more-strained NAS-2 possesses a bent structure and undergoes photoinduced structural planarization (PISP). In the crystal, despite the absence of PISP, bent NAS-2 exhibits prominent excimer emission as well as emission mechanochromism, which is not observed in the planar-like NAS and NAS-1. This unconventional observation results from the bent core structure facilitating π–π stacking of the peripheral naphthalene moieties. Two-photon-coupled depth-dependent emission shows spectral differences between the surface and kernel of the NAS-2 crystal, and is believed to be a general phenomenon, at least in part, for materials exhibiting emission mechanochromism.
- Chen, Deng-Gao,Chen, Yi,Wu, Cheng-Ham,Chen, Yi-An,Chen, Meng-Chi,Lin, Jia-An,Huang, Chun-Ying,Su, Jianhua,Tian, He,Chou, Pi-Tai
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Read Online
- Benzophenothiazine-based n-type organic dye as well as preparation method and application thereof
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The invention discloses a benzophenothiazine-based n-type organic dye and a preparation method thereof. The molecule adopts triphenylamine, carbazole, indoline and the like as electron donating groups, benzophenothiazine is used as a pi conjugate bridge or electron donating group, a long carbon chain is introduced to an N atom of phenothiazine, and cyanoacrylic acid is used as an anchoring group. The organic dyehas the characteristics that benzophenothiazine is adopted as a donor and a pi conjugate bridge, so that charge transfer in molecules can be improved, an energy gap can be adjusted, the spectral response range can be improved, the light capture efficiency can be enhanced, the device performance can be improved, and the preparation method can be used for preparing dye-sensitized solar cells.
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Paragraph 0039-0040
(2021/09/01)
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- Fluorene-containing organic compound as well as preparation method and application thereof in OLED (organic light emitting diode) device
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The invention discloses a fluorene-containing organic compound. The organic compound has the structure formula shown in the general formula (1). The compound has higher glass transition temperature and molecular heat stability, proper HOMO and LUMO energy levels and higher Eg, the photoelectric property of an OLED (organic light emitting diode) device can be effectively improved and the service life of the OLED device can be effectively prolonged through structure optimization of the device.
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Paragraph 0123; 0125
(2018/04/21)
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- Radical Route to 1,4-Benzothiazine Derivatives from 2-Aminobenzenethiols and Ketones under Transition-Metal-Free Conditions
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Transition-metal-free radical access to 1,4-benzothiazine derivatives from o-aminobenzenethiols is disclosed. This procedure is available for various ketones including α,β-unsaturated, cyclic, linear, and fluoroalkyl ketones to generate a number of 1,4-benzothiazines, which exist in numerous bioactive and natural molecules, rendering this protocol attractive to both synthetic and medicinal chemistry.
- Lin, Ya-mei,Lu, Guo-ping,Wang, Rong-kang,Yi, Wen-bin
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supporting information
p. 6424 - 6427
(2016/12/23)
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