Attributes | Values |
---|
rdf:type
| |
Description
| - A series of six keto-hydrazone dyes was prepared by azo coupling of diazotised substituted 2- aminophenols 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 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 electronic structure of a ligand in the complex, based on TD DFT calculations.
- A series of six keto-hydrazone dyes was prepared by azo coupling of diazotised substituted 2- aminophenols 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 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 electronic structure of a ligand in the complex, based on TD DFT calculations. (en)
|
Title
| - Synthesis and spectral properties of new hydrazone dyes and their Co(III) azo complexes
- Synthesis and spectral properties of new hydrazone dyes and their Co(III) azo complexes (en)
|
skos:prefLabel
| - Synthesis and spectral properties of new hydrazone dyes and their Co(III) azo complexes
- Synthesis and spectral properties of new hydrazone dyes and their Co(III) azo complexes (en)
|
skos:notation
| - RIV/62690094:18470/13:50001336!RIV14-MSM-18470___
|
http://linked.open...avai/riv/aktivita
| |
http://linked.open...avai/riv/aktivity
| |
http://linked.open...iv/cisloPeriodika
| |
http://linked.open...vai/riv/dodaniDat
| |
http://linked.open...aciTvurceVysledku
| |
http://linked.open.../riv/druhVysledku
| |
http://linked.open...iv/duvernostUdaju
| |
http://linked.open...titaPredkladatele
| |
http://linked.open...dnocenehoVysledku
| |
http://linked.open...ai/riv/idVysledku
| - RIV/62690094:18470/13:50001336
|
http://linked.open...riv/jazykVysledku
| |
http://linked.open.../riv/klicovaSlova
| - DFT; fluorescence spectra; absorption spectra; metal-azo komplex; pyrrolinone; Hydrazone (en)
|
http://linked.open.../riv/klicoveSlovo
| |
http://linked.open...odStatuVydavatele
| |
http://linked.open...ontrolniKodProRIV
| |
http://linked.open...i/riv/nazevZdroje
| |
http://linked.open...in/vavai/riv/obor
| |
http://linked.open...ichTvurcuVysledku
| |
http://linked.open...cetTvurcuVysledku
| |
http://linked.open...vavai/riv/projekt
| |
http://linked.open...UplatneniVysledku
| |
http://linked.open...v/svazekPeriodika
| |
http://linked.open...iv/tvurceVysledku
| - Lyčka, Antonín
- Mervat, Elsedik
- Oldřich, Machalický
- Radim, Hrdina
- Stanislav, Luňák
- Tarek, Aysha
|
http://linked.open...ain/vavai/riv/wos
| |
issn
| |
number of pages
| |
http://bibframe.org/vocab/doi
| - 10.1016/j.dyepig.2013.04.012
|
http://localhost/t...ganizacniJednotka
| |