320575-24-4Relevant academic research and scientific papers
Novel fluorescent stilbene analogs involving a carbazole moiety
Sigalov,Ben-Asuly,Shapiro,Ellern,Khodorkovsky
, p. 8573 - 8576 (2000)
The synthesis of a series of novel efficient TPA chromophores involving a carbazole moiety from N-(p-formyl)phenylcarbazole precursors and their linear absorption and fluorescent properties are described. (C) 2000 Published by Elsevier Science Ltd.
Dendrimers made of porphyrin cores and carbazole chromophores as peripheral units. Absorption spectra, luminescence properties, and oxidation behavior
Loiseau, Frederique,Campagna, Sebastiane,Hameurlaine, Ahmed,Dehaen, Wim
, p. 11352 - 11363 (2005)
Luminescent and redox-active porphyrin-based dendrimers of first and second generation have been synthesized, and their absorption spectra, photophysical properties, and oxidation behavior have been investigated, together with those of the corresponding a
Zinc-porphyrin dyes with different meso-Aryl substituents for dye-sensitized solar cells: Experimental and theoretical studies
Sirithip, Kanokkorn,Prachumrak, Narid,Rattanawan, Rattanawalee,Keawin, Tinnagon,Sudyoadsuk, Taweesak,Namuangruk, Supawadee,Jungsuttiwong, Siriporn,Promarak, Vinich
, p. 882 - 893 (2015)
A series of new zinc-porphyrin dyes that contain different meso substituents (phenyl, carbazole phenyl, and carbazole thiophenyl groups) and bithiophenyl cyanoacrylic acid as the π-conjugated anchoring moiety were designed, synthesized, and characterized
meso-borneol- andmeso-carbazole-substituted porphyrins: multifunctional chromophores with tunable electronic structures and antitumor activities
Fu, Bo,Dong, Xinyi,Yu, Xiaoxiao,Zhang, Zhen,Sun, Lei,Zhu, Weihua,Liang, Xu,Xu, Haijun
, p. 2141 - 2146 (2021/02/05)
Herein, a series of fiveC2symmetric H2porphyrins withmeso-borneol andmeso-carbazole units have been synthesized and isolated. An analysis of the electronic structures was carried out by spectroscopic investigations and electrochemica
Cyclohexadienone core 3,6-di-tert-butylcarbazole decorated triazole bridged dendrimers: synthesis, photophysical and electrochemical properties and application as an additive in dye-sensitized solar cells
Babu, Janakiraman,Ganesan, Shanmugam,Kumar, Kaliamurthy Ashok,Karuppusamy, Masiyappan,Pandurangan, Arumugam,Rajakumar, Perumal
, p. 4036 - 4048 (2019/03/08)
Cyclohexadienone core 3,6-di-tert-butylcarbazole decorated triazole bridged dendrimers are synthesised up to the second generation using click chemistry via a convergent approach. The molar extinction coefficient and the intensity of the emission band inc
Simply Structured Near-Infrared Emitters with a Multicyano Linear Acceptor for Solution-Processed Organic Light-Emitting Diodes
Zhao, Bingjie,Xie, Guohua,Wang, Huiqin,Han, Chunmiao,Xu, Hui
supporting information, p. 1010 - 1017 (2019/01/09)
Near-infrared (NIR) organic light-emitting diodes (OLEDs) show great potential in a variety of applications including sensors, night vision, and information security. Despite the superiority of thermally activated delayed fluorescence (TADF) in 100 % exci
Mitochondrion-targeted viscosity determination fluorescent probe as well as preparation method and application thereof
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Paragraph 0024; 0027, (2017/09/26)
The invention synthesizes a mitochondrion-targeted viscosity fluorescent probe which takes carbazole as a fluorophore and a positive nitrogen ion as a mitochondrion positioning group by virtue of molecular design. The invention also provides a simple prep
Pyridine derivatives; New efficient additives in bromide/tribromide electrolyte for dye sensitized solar cells
Bagheri, Omid,Dehghani, Hossein,Afrooz, Malihe
, p. 86191 - 86198 (2015/11/03)
In this work, two new inexpensive pyridine derivatives, propyl isonicotinate (PIN) and isopropyl isonicotinate (IPIN), have been synthesized through a simple and low cost method and for the first time, they have been applied as effective additives in bromide/tribromide electrolyte in dye sensitized solar cells (DSSCs). Although the iodide/triiodide redox shuttle shows remarkable performance in DSSCs, but bromide/tribromide couple has a more positive redox potential in comparison to this couple. Therefore, it is good idea to design dyes whose HOMO and LUMO levels match with the redox potential of bromide/tribromide and the conduction band (CB) of TiO2, respectively. We have synthesized 3-(4-carbazole-9-yl-phenyl)-2-cyano-acrylic acid (TC301) and 2-cyano-3-(4-(3,6-di-tert-butyl-9H-carbazole-9-yl)phenyl) acrylic acid (TC302) as two carbazole dyes and applied them with modified electrolyte in DSSCs. The influence of PIN and IPIN additives in bromide/tribromide redox electrolyte on the DSSC performances is investigated. In comparison to electrolyte without additive, adding 0.5 M of these additives to the electrolyte solution leads to an increase in the open circuit voltage (Voc) and short current density (Jsc), consequently the energy conversion efficiency (η) improves. Electrochemical impedance spectroscopy show that the enhancement in Voc is due to increasing electron density in the CB of TiO2 so that a shift in the Fermi level (EF) occurs. It leads to a suppression in electron recombination that has beneficial effect on the Voc. Furthermore, cyclic voltammetry results reveal that PIN and IPIN has similar effect mechanisms to 4-tert-butylpyridine (TBP) additive in the DSSCs. Our findings show that TBP can be replaced with PIN and IPIN in the DSSCs.
Structure and photovoltaic properties of (E)-2-cyano-3-[4-(diphenylamino) phenyl] acrylic acid substituted by tert-butyl groups
Ono, Katsuhiko,Yamaguchi, Tomoya,Tomura, Masaaki
supporting information; experimental part, p. 864 - 866 (2011/01/09)
(E)-3-{ 4-[Bis(4-tert-butylphenyl)amino]phenyl ) -2-cyanoacrylic acid and its related compounds were synthesized by the Knoevenagel condensation of the corresponding 4-aminobenzaldehydes with cyanoacetic acid. Cyclic voltammetry measurements showed that t
Tuning the HOMO energy levels of organic dyes for dye-sensitized solar cells based on Br-/Br3- electrolytes
Teng, Chao,Yang, Xichuan,Li, Shifeng,Cheng, Ming,Hagfeldt, Anders,Wu, Li-Zhu,Sun, Licheng
supporting information; experimental part, p. 13127 - 13138 (2011/02/24)
A series of novel metal-free organic dyes TC301-TC310 with relatively high HOMO levels were synthesized and applied in dye-sensitized solar cells (DSCs) based on electrolytes that contain Br-/Br3- and I-/I3-. The effects of additive Li+ ions and the HOMO levels of the dyes have an important influence on properties of the dyes and performance of DSCs. The addition of Li+ ions in electrolytes can broaden the absorption spectra of the dyes on TiO2 films and shift both the LUMO levels of the dyes and the conduction band of TiO2, thus leading to the increase of Jsc and the decrease of Voc. Upon using Br-/Br3- instead of I-/I3-, a large increase of Voc is attributed to the enlarged energy difference between the redox potentials of electrolyte and the Fermi level of TiO2, as well as the suppressed electron recombination. Incident photon to current efficiency (IPCE) action spectra, electrochemical impedance spectra, and nanosecond laser transient absorption reveal that both the electron collection yields and the dye regeneration yields (Φr) depend on the potential difference (the driving forces) between the oxidized dyes and the Br-/Br 3- redox couple. For the dyes for which the HOMO levels are more positive than the redox potential of Br-/Br3 - sufficient driving forces lead to the longer effective electron-diffusion lengths and almost the same efficient dye regenerations, whereas for the dyes for which the HOMO levels are similar to the redox potential of Br-/Br3-, insufficient driving forces lead to shorter effective electron-diffusion lengths and inefficient dye regenerations. A new middleman: The Br-/Br3- redox mediator was proved to be a promising alternative to I-/I 3- for application in dye-sensitized solar cells (see graphic). Studies show that the energy gap between the HOMO level of the dye and the potential of the Br-/Br3- redox mediator influences their charge-transfer processes and solar-energy conversion efficiency.
