Combined chemical and electrochemical synthesis methods for metal-free polypyrrole actuators

2012 ◽  
Vol 166-167 ◽  
pp. 411-418 ◽  
Author(s):  
Rauno Temmer ◽  
Indrek Must ◽  
Friedrich Kaasik ◽  
Alvo Aabloo ◽  
Tarmo Tamm
Keyword(s):  
Electrochemical Synthesis ◽  
Synthesis Methods ◽  
Metal Free

scholarly journals Metal‐free Electrochemical Synthesis of Sulfonamides Directly from (Hetero)arenes, SO2 and Amines

2020 ◽  
Author(s):  
Stephan P. Blum ◽  
Tarik Karakaya ◽  
Dieter Schollmeyer ◽  
Siegfried R Waldvogel ◽  
Artis Klapars
Keyword(s):  
Electrochemical Synthesis ◽  
Metal Free

Electrochemical Synthesis of Quinazolinones by the Metal-Free and Acceptor-Free Dehydrogenation of 2-Aminobenzamides

Synlett ◽  
2020 ◽  
Vol 31 (18) ◽  
pp. 1795-1799
Author(s):  
Qing-Hu Teng ◽  
Yan-Yan Chen ◽  
Yan Yao ◽  
Xiu-Jin Meng
Keyword(s):  
Electrochemical Synthesis ◽  
Metal Free ◽  
Efficient Approach

An efficient approach has been developed for the construction of quinazolin-4(3H)-ones by the selective anodic dehydrogenative oxidation/cyclization of benzylic chlorides and 2-aminobenzamides. The method features acceptor-free and metal-free dehydrogenation of amines to imines; a subsequent intermolecular addition provides the products in moderate to good yields.

S-Doped three-dimensional graphene (S-3DG): a metal-free electrocatalyst for the electrochemical synthesis of ammonia under ambient conditions

2020 ◽  
Vol 49 (7) ◽  
pp. 2258-2263 ◽  
Author(s):  
Jin Wang ◽  
Shuang Wang ◽  
Jinping Li
Keyword(s):  
Electrochemical Synthesis ◽  
Three Dimensional ◽  
Ambient Conditions ◽  
3D Graphene ◽  
Metal Free ◽  
Electrochemical Synthesis Of Ammonia

3D-graphene provide abundant space for N2, and the carbon–sulfur bonds provides a continuous supply of electrons for N2 reduction. A remarkably large NH3 yield of 38.81 μgNH3 mgcat−1 h−1 and FE of 7.72% for N2 reduction was obtained.

Newly developed electrochemical synthesis of Co-based layered double hydroxides: toward noble metal-free electro-catalysis

2019 ◽  
Vol 7 (18) ◽  
pp. 11241-11249 ◽  
Author(s):  
Elisa Musella ◽  
Isacco Gualandi ◽  
Erika Scavetta ◽  
Arianna Rivalta ◽  
Elisabetta Venuti ◽  
...  
Keyword(s):  
Noble Metal ◽  
Layered Double Hydroxides ◽  
Electrochemical Synthesis ◽  
Metal Free ◽  
Electro Catalysis ◽  
Catalytic Applications ◽  
Double Hydroxides

A novel and reproducible protocol allows the electro-synthesis of LDHs for electro-catalytic applications.

Electrochemical synthesis of enaminones via a decarboxylative coupling reaction

2019 ◽  
Vol 21 (14) ◽  
pp. 3796-3801 ◽  
Author(s):  
Xianqiang Kong ◽  
Yulong Liu ◽  
Long Lin ◽  
Qianjin Chen ◽  
Bo Xu
Keyword(s):  
Electrochemical Synthesis ◽  
Coupling Reaction ◽  
Metal Free ◽  
Redox Catalyst ◽  
Decarboxylative Coupling

Metal-free and oxidant-free n-Bu4NI as a redox catalyst and electrolyte.

scholarly journals Electrochemical Synthesis of Thienoacene Derivatives: Transition‐Metal‐Free Dehydrogenative C−S Coupling Promoted by a Halogen Mediator

2020 ◽  
Vol 59 (20) ◽  
pp. 7803-7807 ◽  
Author(s):  
Koichi Mitsudo ◽  
Ren Matsuo ◽  
Toki Yonezawa ◽  
Haruka Inoue ◽  
Hiroki Mandai ◽  
...  
Keyword(s):  
Transition Metal ◽  
Electrochemical Synthesis ◽  
Metal Free

Electrochemical oxidative synthesis of 1,3,4-thiadiazoles from isothiocyanates and hydrazones

2021 ◽  
Author(s):  
Zhongxiao Ma ◽  
Xiao Hu ◽  
Yanni Li ◽  
Deqiang Liang ◽  
Ying Dong ◽  
...  
Keyword(s):  
Electrochemical Synthesis ◽  
Metal Free

A 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)-catalysed electrochemical synthesis of 2-amino-1,3,4-thiadiazoles from isothiocyanates and hydrazones is presented. This protocol is mild, practical, metal-free and exogenous oxidant-free, and features a broad substrate scope. Extensive mechanistic...

scholarly journals Electrochemical Synthesis of Thienoacene Derivatives: Transition‐Metal‐Free Dehydrogenative C−S Coupling Promoted by a Halogen Mediator

2020 ◽  
Vol 132 (20) ◽  
pp. 7877-7881
Author(s):  
Koichi Mitsudo ◽  
Ren Matsuo ◽  
Toki Yonezawa ◽  
Haruka Inoue ◽  
Hiroki Mandai ◽  
...  
Keyword(s):  
Transition Metal ◽  
Electrochemical Synthesis ◽  
Metal Free

scholarly journals PHOTOELECTROCHEMICAL PROPERTIES OF FILMS BASED ON BISMUTH AND COPPER VANADATES

2021 ◽  
Vol 87 (1) ◽  
pp. 3-12
Author(s):  
Vitaliy Smilyk ◽  
Sergii Fomaniyk ◽  
Gennady Kolbasov ◽  
Igor Rysetskiy ◽  
Michael Danilov
Keyword(s):  
Electrochemical Deposition ◽  
Electrochemical Synthesis ◽  
Amorphous Structure ◽  
Complex Compounds ◽  
Color Contrast ◽  
Synthesis Methods ◽  
Bismuth Tungstate ◽  
X Ray ◽  
Method Of Production ◽  
Ionic Layering

Films of bismuth and nickel tungstates were obtained by chemical and electrochemical synthesis. Bismuth tungstate was obtained by ionic layering and electrochemical deposition. Nickel tungstate (NiWO4) was obtained by combined synthesis methods: 1st - electrochemical synthesis and 2nd - combined electrochemical and thermochemical synthesis. The obtained materials have good adhesion with an optically transparent SnO2 substrate. It is shown that the mechanism of electrochemical formation of Bi2WO6 and NiWO4 films is similar to the processes of WO3 formation as a result of electroreduction of peroxide-complex compounds based on tungstate ions, which were studied in detail in. From the data of coloring kinetics the speed, efficiency and stability of electrochromic material depending on its cycling time are estimated. It is shown that tungstates can cycle for a long time with galvanostatic current change and different potentials. Comparison of electrochromic properties of nickel and bismuth tungstate films obtained by ionic stratification, electrodeposition and combined electrochemical and thermochemical methods showed that polycrystalline films have a lower color contrast compared to films obtained by electrodeposition. Using X-ray phase analysis, it was found that the structure of the obtained materials depended on the method of production. Comparison of X-ray diffraction data for chemically and electrochemically obtained Bi2WO6 showed that the films obtained by electrochemical deposition have more amorphous structure, possibly with inclusions of orthorhombic Bi2WO6 and hexagonal WO3 crystallites, while the films obtained by ionic layering have a layer of polycrystals, indicates the fine-grained obtained crystallites. The studied properties of Bi2WO6 and NiWO4 meet the requirements for electrochromic materials in terms of providing high color contrast in the visible part of the spectrum.

scholarly journals Metal‐free Electrochemical Synthesis of Sulfonamides Directly from (Hetero)arenes, SO2 and Amines

2020 ◽  
Author(s):  
Stephan P. Blum ◽  
Tarik Karakaya ◽  
Dieter Schollmeyer ◽  
Siegfried R Waldvogel ◽  
Artis Klapars
Keyword(s):  
Electrochemical Synthesis ◽  
Metal Free
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