84-54-8Relevant articles and documents
Photoinduced electron transfer between 2-methylanthraquinone and triethylamine in an ionic liquid: Time-resolved EPR and transient absorption spectroscopy study
Zhu, Guanglai,Wang, Yu,Fu, Haiying,Xu, Xinsheng,Cui, Zhifeng,Ji, Xuehan,Wu, Guozhong
, p. 148 - 153 (2015)
Photoinduced electron transfer between 2-methylanthraquinone (MeAQ) and triethylamine (TEA) in a room-temperature ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), was investigated by comparing the time-resolved electron paramagnetic resonance (TR-EPR) spectroscopy and the transient absorption spectroscopy. The results of TR-EPR spectroscopy, in which MeAQ was 8 mmol L-1and TEA was 150 mmol L-1, indicated that the transient radical would exist longer time in [bmim][PF6] than in acetonitrile. At the delay time of 8 μs after laser excitation, the TR-EPR signal transformed from an emissive peak into an absorptive peak when the experiment was performed in [bmim][PF6]. The results of the transient absorption spectroscopy, in which MeAQ was 0.1 mmol L-1and TEA was 2.2 mmol L-1, showed that the efficiency and the rate of the photoinduced electron transfer reaction in [bmim][PF6] were obviously lower than that in acetonitrile. It was concluded that various factors, such as concentration, viscosity and local structural transformation of the solution, have an influence on the process of photoinduced electron transfer in [bmim][PF6].
Electroreductive Cleavage of Substituted 9,10-Anthraquinones in 50percent Aqueous THF Buffers: A pH-Dependent Process
Blankespoor, Ronald L.,Hsung, Richard,Schutt, David L.
, p. 3032 - 3035 (1988)
A variety of substituted 9,10-anthraquinones with acetate leaving groups (4a-7a) were reduced at a glassy carbon electrode in 50percent aqueous THF prepared from aqueous buffers at pH 6, 7, and 8.Cyclic voltammograms of these compounds exhibited a single reduction wave with Ep values of -450 to -530 mV (vs Ag/AgCl/0.10 M Cl-) at pH 7.Ep shifted to more negative values with increasing pH (45-50 mV/pH unit) consistent with a 2e-/2H+ reduction process which converts 4a-7a to their corresponding anthrahydroquinones.Constant potential reduction of acetates 4a-7a at -800 mV at pH 6 or 7 gave n values of 2.2-2.4.Air oxidation of the catholytes, a procedure that converts anthrahydroquinones to anthraquinones, led to a 56-89percent recovery of the acetates and 7-32percent yields of the reductive cleavage products 4b-7b.In contrast, electroreduction of 4a-7a at pH 8 gave much higher yields (50-73percent) of 4b-7b with n values of 3.5-3.8.This pH-dependent process suggests that 4a-7a cleave much slower via their intermediate anthrahydroquinones than the conjugate bases of their anthrahydroquinones, which are present in relatively high concentration at higher pH.NaOH titration curves of the anthrahydroquinones of 5a and 5b support this mechanistic picture.
Friedel - gram acylating reaction method based on phthalic anhydride and aromatic alkyl compound
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Paragraph 0043-0045, (2021/09/08)
A part of a substituted alkylbenzene is used as a solvent and a reaction raw material for - gram acylating reaction, a part of a substituted alkylbenzene is dissolved in a reaction raw material phthalic anhydride and a chloroaluminate ionic liquid catalyst, and a residual part of a substituted alkylbenzene is added dropwise - to obtain - (2 - 4' - alkylbenzoyl) benzoic acid intermediate. 2 -position positioning selectivity of the method is higher, and the reaction production cost is low.
Tetracyano-anthraquinone dimethane micromolecular receptor material as well as preparation method and application thereof
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Paragraph 0059; 0066-0068; 0078; 0085-0087, (2020/05/11)
The invention relates to a tetracyano-anthraquinone dimethane micromolecular acceptor material as well as a preparation method and application thereof. The structure of the acceptor material is as shown in a formula I, which is described in the specification. The micromolecular acceptor material has good solubility and stability, the absorption spectrum is well matched with the solar spectrum, andthe micromolecular acceptor material can be used for organic solar cells.