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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/62690094:18470/13:50001336

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CC - Organická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/EE2.3.30.0021" target="_blank" >EE2.3.30.0021: Posílení excelentních týmů výzkumu a vývoje na Univerzitě Pardubice</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Dyes and Pigments

ISSN

0143-7208

e-ISSN

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Svazek periodika

98

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

547-556

Kód UT WoS článku

000321169000031

EID výsledku v databázi Scopus

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