13290-96-5Relevant articles and documents
Photoactive and physical properties of an azobenzene-containing coordination framework
Caddy, James S.,Faust, Thomas B.,Walton, Ian M.,Cox, Jordan M.,Benedict, Jason B.,Solomon, Marcello B.,Southon, Peter D.,Kepert, Cameron J.,D'Alessandro, Deanna M.
, p. 1171 - 1179 (2017)
A new three-dimensional coordination framework, [Zn4(tbazip)3(bpe)2(OH)2]·bpe·{solvent} (where bpe≤1,2-di(4-pyridyl)ethene) containing the novel photoactive ligand tbazip (tbazip≤5-((4-tert-butyl)phenylazo)isophthalic acid) has been synthesised and crystallographically characterised. The photoactivity of discrete tbazip was investigated and compared with its photoactivity while incorporated within the framework. The effect of isomerisation of the incorporated azobenzene on the chemical and physical properties of the framework were investigated using UV-vis and Raman spectroscopies. The framework is porous only to hydrogen gas at 77K, but displayed an appreciable uptake for CO2 at 195K.
Preparation technology of iopromide intermediate
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Paragraph 0025, (2016/12/26)
The invention provides an iopromide intermediate. A preparation technology of a compound 3-(2,3-dihydroxypropyl formamyl)-5-nitroisophthalic acid comprises the steps that monomethyl 5-nitroisophthalate is reacted with 3-amino propane-1,2-diol in alcohol solvent at appropriate heating temperature on the condition that strong alkali exists to obtain a product, wherein the reaction equation is shown in the specification. According to the preparation technology of the iopromide intermediate, the synthetic technology is good in selectivity, the synthetic route is simple, the product can be obtained through simple filtration, and the yield is high. Therefore, the technology has the advantages of being efficient, rapid and low in cost.
Nonacid nitration of benzenedicarboxylic and naphthalenecarboxylic acid esters
Nose,Suzuki,Suzuki
, p. 4356 - 4360 (2007/10/03)
When treated with nitrogen dioxide in the presence of ozone and a catalytic amount of iron(III) chloride in inert organic solvent at -10 to +5 °C, benzenedicarboxylic acid diesters 1, 4, and 6 underwent smooth nitration to give the corresponding mononitro derivatives 2/3, 5, and 7, respectively, in good yield (kyodai nitration). Naphthalenecarboxylic acid esters 8 and 11 and naphthalene-1,8-dicarboxylic acid diester 16 were similarly nitrated in the absence of catalyst to give the expected nitro compounds 9/10, 12-15, and 17-22, respectively. Different from conventional nitration based on the combined use of concentrated nitric and sulfuric acids, no hydrolytic cleavage of the ester function was observed under these conditions. The isomer distribution has been determined for the nitration of naphthalenecarboxylic acid esters 8, 11, and 16, and spectral data were collected for less common nitro derivatives. A unique changeover of the orientation mode observed in the kyodai nitration of diester 16, from the initial exclusive meta to the final meta/para, has been discussed in terms of the competition between the electrophilic substitution process involving the nitronium ion (NO2+) and the addition-elimination sequence involving the nitrogen trioxide radical (NO3).