نتایج جستجو برای: tetra nitro carbazole

تعداد نتایج: 23828  

2010
Ding-Qiang Lu Jia Chen Wen-Yuan Wu Xiu-Quan Ling Ya-Jun Chang

In the title compound, C(15)H(13)NO(2), all atoms of the carbazole group are coplanar (r.m.s. deviation = 0.005 Å), and the dihedral angle between this plane and C-O-C plane of oxane group is 57.1 (4)°. The crystal packing is stabilized by an N-H⋯O hydrogen bond, resulting in infinite supra-molecular chains along [001].

Journal: :Journal of AOAC International 2001
N B Kyriakidis E Psoma

In the colorimetric determination of pectin by the carbazole method, some of the interfering compounds have been identified but the possible interference of different hydrocolloids is not known. Several hydrocolloids are currently used in the preparation of imitation and adulterated orange juice for cloud stabilization. Hydrocolloids studied were gum arabic, carboxylmethyl cellulose, sodium alg...

Journal: :ACS applied materials & interfaces 2009
Ming-Han Tsai Tung-Huei Ke Hao-Wu Lin Chung-Chih Wu Shih-Feng Chiu Fu-Chuan Fang Yuan-Li Liao Ken-Tsung Wong Yu-Hung Chen Chih-I Wu

Carbazole-based materials adopting the nonconjugated substitution of triphenylsilyl (-SiPh(3)) and trityl (-CPh(3)) side groups are studied as high-triplet-energy, morphologically, and electrochemically stable host materials with tunable carrier-transport properties for organic blue electrophosphorescence. The developed host materials 9-(4-tert-butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole ...

2003
BY GEORGE HOLZMAN ROBERT V. MAcALLISTER CARL NIEMANN

The difficulty of applying classical procedures to the qualitative and quantitative determination of carbohydrate in certain biological materials has led to the development of calorimetric methods in which the carbohydrate-containing material is treated with strong mineral acids, causing t,he formation of substances which will react with compounds such as diphenylamine, resorcinol, orcinol, ind...

Journal: :Journal of the American Chemical Society 2005
Frédérique Loiseau Sebastiano Campagna Ahmed Hameurlaine Wim Dehaen

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 aldehyde carbazole precursors. All the dendrimers contain a porphyrin core and carbazole-based chromophores as branches. The structural formula...

Journal: :journal of the iranian chemical research 0
mohammed bouachrine unité de recherche sur les macromolécules et modélisation, faculté des sciences et techniques, b. p. 509 boutalamine, 5200, errachidia, maroc kenza hasnaoui unité de recherche sur les macromolécules et modélisation, faculté des sciences et techniques, b. p. 509 boutalamine, 5200, errachidia, maroc abdellatif makayssi unité de recherche sur les macromolécules et modélisation, faculté des sciences et techniques, b. p. 509 boutalamine, 5200, errachidia, maroc mohammed hamidi unité de chimie théorique appliquée, faculté des sciences et techniques, b. p. 509 boutalamine, 5200, errachidia, maroc

in this work, we present firstly a study based on the calculation of the local spin densities of radical cations, which is known as a good measure of reactivity for coupling reactions, to obtain a theoretical basis for the one-step formation of poly(3.6-carbazole) and derivatives. then we detail a dft theoretical study of the geometric and electronic properties of oligomers based on carbazole a...

Journal: :Journal of natural products 2003
Yun-Song Wang Hong-Ping He Yue-Mao Shen Xin Hong Xiao-Jiang Hao

Two new carbazole alkaloids named murrayanine (1) and 8,8' '-biskoenigine (2) were isolated from Murraya koenigii. The structure elucidations for 1 and 2 were carried out on the basis of 1D and 2D NMR experiments. Compound 1 was a novel carbazole alkaloid with a rare phenylpropanyl substitution. Compound 2 was a symmetrical dimer of the carbazole alkaloid koenigine and showed antiosteoporotic a...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2005
mansoor keyanpour rad

a new carbazole- containing polymer has been synthesized for further photophysical studies. efficient synthesis of the substituted methyl methacrylate has been accomplished via microwave assisted synthesis of 1 - chloro - 4-carboxy -5,6, 7, 8- tetrahydrocarbazole followed by further steps, such as reduction of the 4-substituted methyl carboxylate, dechlorination of the ring and at last, the rea...

Journal: :Catalysts 2021

Recently, there have been numerous efforts to develop hydrogen-rich organic materials because hydrogen energy is emerging as a renewable source. In this regard, we designed and prepared four new based on N-alkyl-bis(carbazole), 9,9′-(2-methylpropane-1,3-diyl)bis(9H-carbazole) (MBC), 9,9′-(2-ethylpropane-1,3-diyl)bis(9H-carbazole) (EBC), 9,9′-(2-propylpropane-1,3-diyl)bis(9H-carbazole) (PBC), 9,...

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