5891-21-4Relevant articles and documents
A novel composite electrode material derived from bisferrocenyl-functionalized GO and PANI for high performance supercapacitor
Ahadzadeh, Iraj,Mohammadi, Reza,Payami, Elmira,Teimuri-Mofrad, Reza
, (2020)
A novel bisferrocenyl based epoxy compound was synthesized to be used for further surface modification of graphene oxide (GO). GO surface was firstly modified with ethylenediamine (EDA) as an amine linker and then bisferrocenyl based epoxy compound was covalently grafted to the GO surface through the epoxide ring opening reaction. Afterwards, polyaniline (PANI) nanofibers were physically adsorbed onto the surface of the modified GO to obtain a potentially high-performance nanocomposite for battery-type supercapacitor applications. The surface modification, crystalline structure, morphology, composition, and microstructure of the synthesized nanocomposites were further investigated using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and N2 adsorption/desorption analyses, respectively. Also, the electrochemical behavior of the synthesized nanocomposites was investigated by electrochemical methods of cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), galvanostatic charge-discharge measurement (GCD). The final nanocomposite electrode exhibited a charge storage capacity of 272 mAh g?1, and capacity retention of 89 % over 3000 CV cycles. A high energy density of 69.3 Wh kg?1 and high power density of 6171 W kg?1 were achieved in a symmetrical two-electrode configuration.
(±)-Camphor sulfonic acid assisted IBX based oxidation of 1° and 2° alcohols
Kumar, Kamlesh,Joshi, Penny,Rawat, Diwan S
, (2021/09/02)
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Palladium/Copper-catalyzed Oxidation of Aliphatic Terminal Alkenes to Aldehydes Assisted by p-Benzoquinone
Komori, Saki,Yamaguchi, Yoshiko,Murakami, Yuka,Kataoka, Yasutaka,Ura, Yasuyuki
, p. 3946 - 3955 (2020/07/06)
The development of an anti-Markovnikov Wacker-type oxidation for simple aliphatic alkenes is a significant challenge. Herein, a variety of aldehydes can be selectively obtained from various unbiased aliphatic terminal alkenes using PdCl2(MeCN)2/CuCl in the presence of p-benzoquinone (BQ) under mild reaction conditions. Isomerization of the terminal alkene to the internal alkene was suppressed via slow addition of the starting material to the reaction mixture. In addition to the Pd catalyst, CuCl and BQ were essential in order to obtain the anti-Markovnikov product with high selectivity. Terminal alkenes bearing a halogen substituent afforded their corresponding aldehydes with high anti-Markovnikov selectivity. The halogen acts as a directing group in the reaction. DFT calculations indicate that a μ-chloro Pd(II)?Cu(I) bimetallic species with BQ coordinated to Cu is the catalytically active species in the case of a terminal alkene without a directing group.