Synthesis and spectral properties of new hydrazone dyes and their Co(III) azo complexes

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F13%3A39896173" target="_blank" >RIV/00216275:25310/13:39896173 - isvavai.cz</a>
Alternative codes found
RIV/62690094:18470/13:50001336
Result on the web
<a href="http://dx.doi.org/10.1016/j.dyepig.2013.04.012" target="_blank" >http://dx.doi.org/10.1016/j.dyepig.2013.04.012</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.dyepig.2013.04.012" target="_blank" >10.1016/j.dyepig.2013.04.012</a>

Result language
angličtina
Original language name
Synthesis and spectral properties of new hydrazone dyes and their Co(III) azo complexes
Original language description
A series of six keto-hydrazone dyes was prepared by azo coupling of diazotised substituted 2aminophenols with pyrrolinone esters. All keto-hydrazone compounds were found as a mixtures of E and Z isomers by 1H NMR. Irrespective to the position of nitro substituent on the phenol ring, all compounds fluoresce strongly only in solvent glass at 77 K except of 4-nitro derivatives which also weakly fluoresce in solution and in solid-state at room temperature. Using these hydrazones as tridentate O-N-O' ligands, six symmetrical 2:1 octahedral Co(III) complexes were prepared. Multinuclear NMR combined with 15N labelled hydrazone derivative proved that the starting mixture of hydrazone isomers was converted exclusively to E-azo configuration in complexes with coordinated nitrogen atoms coming solely from phenolic residues. The considerably different effect of 4- and 5-nitrophenol substituents on absorption spectra of the ligands and complexes was ascribed to prevailing azo character of an electr
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CC - Organic chemistry
OECD FORD branch
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Project
<a href="/en/project/EE2.3.30.0021" target="_blank" >EE2.3.30.0021: Strenthening of Research and Development Teams at the University of Pardubice</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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