312924-93-9Relevant articles and documents
Assembly and stepwise oxidation of interpenetrated coordination cages based on phenothiazine
Frank, Marina,Hey, Jakob,Balcioglu, Ilker,Chen, Yu-Sheng,Stalke, Dietmar,Suenobu, Tomoyoshi,Fukuzumi, Shunichi,Frauendorf, Holm,Clever, Guido H.
, p. 10102 - 10106 (2013)
A breath of fresh air is sufficient for the eightfold S-monooxygenation of an interpenetrated double cage based on eight phenothiazine ligands and four square-planar-coordinated PdII cations. Besides these two cages, which were both characterized by X-ray crystallography, an eightfold S-dioxygenated double-cage was obtained under harsher oxidation conditions.
Phenothiazine-Based Conjugated Polymers: Synthesis, Electrochemistry, and Light-Emitting Properties
Kong, Xiangxing,Kulkarni, Abhishek P.,Jenekhe, Samson A.
, p. 8992 - 8999 (2003)
Two new phenothiazine-containing conjugated polymers, poly(10-hexylphenothiazine-3,7-diyl) (PHPT) and poly(10-hexylphenothiazine-3,7-diyl-alt-9,9-dihexyl-2,7-fluorene) (PPTF), were synthesized and characterized, and their photophysical, electrochemical, and electroluminescent properties were investigated. The optical band gaps of PHPT and PPTF were 2.69 and 2.76 eV, respectively. Both polymers showed greenish-blue photoluminescence (490 nm) in dilute solutions with a fluorescence quantum yield of 0.40. Identical solid-state and dilute solution absorption and emission spectra were observed, showing that excimers were not formed in PHPT or PPTF thin films. Ionization potentials (HOMO levels) estimated from cyclic voltammetry were 5.0-5.1 eV for the phenothiazine-based polymers, making them good candidates for hole transport materials in devices. Spectroelectrochemistry revealed that the observed multiple oxidation peaks in the cyclic voltammetry of PHPT have associated multiple absorption peaks due to the formation of radical cations (polarons) and dications (bipolarons). Greenish-blue electroluminescence with luminance of up to 320 cd/m2 was observed for the PPTF organic light-emitting diodes. These results show that the phenothiazine ring is an excellent building block for lowering the ionization potential and for impeding π-stacking aggregation and excimer formation in conjugated polymers.
Synthesis and electronic properties of monodisperse oligophenothiazines
Sailer, Markus,Franz, Adam W.,Mueller, Thomas J. J.
, p. 2602 - 2614 (2008)
Starting from N-hexylphenothiazine, a versatile construction kit of brominated and borylated phenothiazines can be easily prepared by a sequence of bromination, bromo-lithium exchange/borylation, and Suzuki coupling. Subsequent Suzuki arylation of the building blocks gives soluble, monodisperse, and structurally well defined oligophenothiazines in good yields. The molecular weights at the peak maximum (Mp), obtained by GPC (gel permeation chromatography), and the actual molecular weights of the oligomer series, obtained by mass spectrometry, show excellent correlation. A QM/MM conformational analysis for the complete series reveals that the obvious butterfly-shaped phenothiazine structure multiplies and significantly reduces the hydrodynamic volume of the oligomers. The electronic properties (absorption and emission spectroscopy and cyclic voltammetry) give reasonable correlations with the chain length. With regard to the emission maxima, the effective conjugation length is already reached with the hexamer. Oligophenothiazines are highly fluorescent, with high fluorescence quantum yields, and are simultaneously highly electroactive, with low oxidation potentials.
Position engineering of cyanoacrylic-acid anchoring group in a dye for DSSC applications
Ding, Yongjie,Fan, Xingli,Gao, Zhiqiang,Jiao, Yunfei,Liu, Shuaishuai,Mi, Baoxiu,Song, Juan
, (2020)
This study provides insights into the molecular tailoring of DSSC dyes via synthesis/investigation of three new organic dyes with the position engineering of the acceptor moiety. Differences in photophysical, electrochemical and photovoltaic properties are found and interpreted in detail. The excitation-spectrum study shows that the population of the intramolecular charge transfer (ICT) is incident-wavelength dependent; and the ICT excitons originate not only from direct ICT band transition but also from π-π* energy transfer, and the degree of the latter depends much on the position of the anchoring group. The transient photoluminescence discloses that the non-injection quenching of the ortho dye is the most severe possibly due to the instability of the excited state resulting from the hurdling of electron delocalization by the large steric hinderance. Large steric hinderance in the ortho dye also results in the least dye loading on TiO2 photoanode. Due to broader/stronger absorption, higher dye loading, high injection efficiency and low charge recombination rate, the para-substituted dye DSSC device achieves the best performance with power conversion efficiency of 6.63%; while the ortho dye based device performs the worst with significant lower of photocurrent and photovoltage compared to the para dye. The dye dependent VOC is explained by combination of dipole moment and dye loading. Particularly, the employing of excitation spectrum as tools to investigate the intrinsic photophysical complicity of dyes with D-π-A structure, which is scarcely reported, is proved to be an effective way.
New phenothiazine dyes containing benzothiadiazole-acceptor for dye-sensitized solar cells
Ding, Yongjie,Gao, Zhiqiang,Jiao, Yunfei,Li, Jianhua,Liu, Shuaishuai,Mi, Baoxiu,Shi, Kaihang,Tan, Yanfang,Xu, Wenjuan
, (2021/07/31)
In this work, we designed and synthesized two new phenothiazine dyes CBPTZ-BTD1 and CBPTZ-BTD2, which employed the electron-accepting moiety of benzothiadiazole (BTD). The structural difference between the two new dyes is due to the presence of an ethynyl unit between BTD and the benzoic acid. With respect to its congener CBPTZ-BTD1, CBPTZ-BTD2 with the insertion of ethynyl group shows a more coplanar molecular skeleton, which endows CBPTZ-BTD2 with a higher dye loading and a strengthened ICT effect, resulting in a red-shifted ICT absorption with a higher molar extinction coefficient. Besides, CBPTZ-BTD2 has a longer electron lifetime in comparation with CBPTZ-BTD1 without the linear ethynyl unit, as reveled by OCVD and EIS measurements. Therefore, CBPTZ-BTD2 exhibits a better photovoltaic performance with an enhanced JSC of 14.04 mA cm?2 and VOC of 0.82 V, leading to an improved PCE of 7.33 %.
Semiconducting Polymer Dots with Dual-Enhanced NIR-IIa Fluorescence for Through-Skull Mouse-Brain Imaging
Zhang, Zhe,Fang, Xiaofeng,Liu, Zhihe,Liu, Haichao,Chen, Dandan,He, Shuqing,Zheng, Jie,Yang, Bing,Qin, Weiping,Zhang, Xuanjun,Wu, Changfeng
, p. 3691 - 3698 (2020/02/04)
Fluorescence probes in the NIR-IIa region show drastically improved imaging owing to the reduced photon scattering and autofluorescence in biological tissues. Now, NIR-IIa polymer dots (Pdots) are developed with a dual fluorescence enhancement mechanism.
Phenothiazine dyes and application thereof in dye-sensitized solar cells
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, (2020/01/25)
The invention belongs to the field of organic photoelectric functional materials and application thereof in solar cells, and relates to phenothiazine dyes and application thereof in dye-sensitized solar cells. The phenothiazine dyes disclosed by the invention have a structural general formula shown in the specification of the invention. The dyes provided by the invention have relatively strong light absorption capability; exciton dissociation and dye regeneration can be effectively carried out; a relatively good intermolecular aggregation form and a relatively good adsorption form can be formed; a dye synthesis method provided by the invention is simple, controllable and low in cost, and higher photoelectric conversion efficiency is obtained when the phenothiazine dyes are applied to dye-sensitized solar cell devices.
HETEROAROMATIC DERIVATIVE COMPOUND FOR ORGANIC ELECTROLUMINESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
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, (2020/12/30)
A compound for an organic electroluminescent device comprises the compound 1. It is thereby possible. The present invention relates to a heterocyclic compound for an organic electroluminescent device and a method for manufacturing the same. Structural 1.
Phenothiazinyl diazosulfide dyes and preparation method thereof and dye-sensitized solar cell employing same
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, (2019/11/04)
The invention provides phenothiazinyl diazosulfide dyes and a preparation method thereof and a dye-sensitized solar cell employing the same. The formula (I) of the molecular structure of the phenothiazinyl diazosulfide dyes is as follows, in which R, Ar1,
Hole transport materials including OLED applications
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, (2015/09/22)
The composition described here comprises at least one hole-transporting compound, wherein the hole-transporting compound comprises a core covalently bonded to at least two arylamine groups, wherein the arylamine group optionally comprises one or more intractability groups. The composition can provide good film formation and stability when coated onto hole injection layers. Solution processing of hole transporting layers of OLEDs can be achieved with the composition described here. Good mobility can be achieved.
