نتایج جستجو برای: 12 phenylenediamine

تعداد نتایج: 582123  

Journal: :Molecules 2017
Gabriele Micheletti Silvia Bordoni Elena Chugunova Carla Boga

Aromatic substitution reactions between 1,3-diaminobenzene and chloronitrobenzofurazan derivatives have never been reported so far. The aim of the current study was to synthesize novel electron-donor and -acceptor architectures of interest in applied fields and to provide new insights on the nucleophilic behavior of 1,3-diaminobenzenes. The reaction of 1,3-dipiperidinyl-, 1,3-dimorpholinyl-, 1,...

Journal: :Nano letters 2011
V Fatemi M Kamenetska J B Neaton L Venkataraman

The conductance of individual 1,4-benzenediamine (BDA)-Au molecular junctions is measured in different solvent environments using a scanning tunneling microscope based point-contact technique. Solvents are found to increase the conductance of these molecular junctions by as much as 50%. Using first principles calculations, we explain this increase by showing that a shift in the Au contact work ...

Journal: :Chemical communications 2009
Ayellet L Zelikoff Jacob Kopilov Israel Goldberg Geoffrey W Coates Moshe Kol

Phenylenediamine bis(phenolate) binds in the reduced dianionic form to titanium and zirconium alkoxides giving either mononuclear or bridging dinuclear complexes depending on the metal precursors; the fluxional mononuclear titanium complex is found to exhibit extremely high activity in polymerisation of rac-lactide in the melt.

2010
Kaare Engkilde Karsten Buschard Axel Kornerup Hansen Torkil Menné Jeanne Duus Johansen

BACKGROUND Type 1 diabetes is an autoimmune disease, while allergic contact dermatitis although immune mediated, is considered an exposure driven disease that develops due to epicutaneous contact with reactive low-molecular chemicals. The objective of the present study was to experimentally study the effect of contact allergens on the development of diabetes in NOD mice. As the link between con...

A water soluble, Bronsted acid, 5-sulfosalicylic acid as an efficient organocatalyst was used for the synthesis of physiologically active 2-substituted benzimidazole derivatives from o-phenylenediamine and aromatic aldehydes in ethanol at reflux condition. Cost-effectiveness, use of non-hazardous solvents, metal free and commercially available catalyst, single-step, environmentally fri...

Journal: :Organic letters 2013
Cheng Li Chengyi Xiao Yan Li Zhaohui Wang

A series of heterocyclic acene diimides were synthesized effectively based on the condensation of o-phenylenediamine, 1,2-benzenedithiol, and 2-aminothiophenol with 2,3,6,7-tetrabromo-1,4,5,8-naphthalene tetracarboxylic diimide. The diimides exhibit interesting optical and electrical properties with one of them showing a hole mobility up to 0.02 cm(2) V(-1) s(-1).

2013
Heshmatollah Alinezhad Mahmood Tajbakhsh Mohammad Norouzi Saeed Baghery

2-Methylpyridinium trifluoromethanesulfonate ([2-MPyH]OTf) catalyzed synthesis of 1,5benzodiazepine and quinoxaline derivatives in the reaction of between o-phenylenediamine and ketone (synthesis of 1,5-benzodiazepine derivatives) or 1,2-diketone (synthesis of quinoxaline derivatives) in high yields and short time reaction. The catalyst can be separated from the products by a change in the solv...

2011
Pandeng Zhou Hao Liu Shicheng Chen Lucian Lucia Huaiyu Zhan Shiyu Fu

Herein, we synthesized 2,3-diaminophenazine (DAP) from o-phenylenediamine (OP) using fungal laccase as a biocatalyst. The conversion ratio of OP monomer was 85% and the yield of the final purified product, DAP, was 63%. The structure of the main product, DAP, was confirmed by using several spectroscopy techniques (UV-VIS, IR, 2DNMR, and MS).

Journal: :Chemical communications 2006
Jiaobing Wang Xuhong Qian

This communication presents two regioisomeric fluorescent PET Hg(II) sensors RS, which contain a novel o-phenylenediamine based triamide receptor; RS could be used to detect Hg(II) with exclusive selectivity, high fluorescence enhancement, and fast and reversible response in a neutral buffered aqueous solution.

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