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Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes

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Authors
Majstorović, Helena
Tešić, Živoslav
Milojković-Opsenica, Dušanka
Article (Published version)
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Abstract
The chromatographic behavior of four mixed tris(beta-diketonato) complexes of the type [Co(acac)(3-n)(phacphac)(n)] (n = 0-3), three (beta-ketoiminato)-Cu(II) complexes, two tris(alkylxanthato)-Co(III) complexes, and five bis(alkylxanthato)-Ni(II) complexes has been studied on thin layers of CN-silica gel with fifteen mobile phases, thirteen of which resulted in normal-phase systems. Linear relationships were established between the R, values of tris(beta-diketonato) complexes and the amount [% nu/nu] of acetone in hexane-acetone mobile phases, and between the R-M values of these complexes and the number of acac ligands substituted by phacphac ligands. The results obtained were compared with previously observed chromatographic behavior of the same substances on thin layers of silica gel and polyacrylonitrile. The corresponding separation mechanisms were also considered. It was assumed that under conditions of normal-phase chromatography with solvents of low polarity the retention behav...ior of complexes containing aromatic rings in the molecule is mainly determined by donor-acceptor interactions of the cyano groups of the adsorbent with the pi-electron systems of the substances being separated.

Keywords:
thin-layer chromatography / separation mechanisms / CN-modified silica / alkylxanthato complexes / (beta-ketoiminato)-Cu(II) complexes / (beta-diketonato)-Co(III) complexes
Source:
JPC-Journal of Planar Chromatography-Modern TLC, 2002, 15, 5, 341-344
Publisher:
  • Springer Heidelberg, Heidelberg

DOI: 10.1556/JPC.15.2002.5.4

ISSN: 0933-4173

WoS: 000180118300004

Scopus: 2-s2.0-0842326775
[ Google Scholar ]
5
6
URI
https://intam.institut-tamis.rs/handle/123456789/136
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Istraživačko razvojni institut TAMIŠ
TY  - JOUR
AU  - Majstorović, Helena
AU  - Tešić, Živoslav
AU  - Milojković-Opsenica, Dušanka
PY  - 2002
UR  - https://intam.institut-tamis.rs/handle/123456789/136
AB  - The chromatographic behavior of four mixed tris(beta-diketonato) complexes of the type [Co(acac)(3-n)(phacphac)(n)] (n = 0-3), three (beta-ketoiminato)-Cu(II) complexes, two tris(alkylxanthato)-Co(III) complexes, and five bis(alkylxanthato)-Ni(II) complexes has been studied on thin layers of CN-silica gel with fifteen mobile phases, thirteen of which resulted in normal-phase systems. Linear relationships were established between the R, values of tris(beta-diketonato) complexes and the amount [% nu/nu] of acetone in hexane-acetone mobile phases, and between the R-M values of these complexes and the number of acac ligands substituted by phacphac ligands. The results obtained were compared with previously observed chromatographic behavior of the same substances on thin layers of silica gel and polyacrylonitrile. The corresponding separation mechanisms were also considered. It was assumed that under conditions of normal-phase chromatography with solvents of low polarity the retention behavior of complexes containing aromatic rings in the molecule is mainly determined by donor-acceptor interactions of the cyano groups of the adsorbent with the pi-electron systems of the substances being separated.
PB  - Springer Heidelberg, Heidelberg
T2  - JPC-Journal of Planar Chromatography-Modern TLC
T1  - Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes
EP  - 344
IS  - 5
SP  - 341
VL  - 15
DO  - 10.1556/JPC.15.2002.5.4
UR  - conv_144
ER  - 
@article{
author = "Majstorović, Helena and Tešić, Živoslav and Milojković-Opsenica, Dušanka",
year = "2002",
abstract = "The chromatographic behavior of four mixed tris(beta-diketonato) complexes of the type [Co(acac)(3-n)(phacphac)(n)] (n = 0-3), three (beta-ketoiminato)-Cu(II) complexes, two tris(alkylxanthato)-Co(III) complexes, and five bis(alkylxanthato)-Ni(II) complexes has been studied on thin layers of CN-silica gel with fifteen mobile phases, thirteen of which resulted in normal-phase systems. Linear relationships were established between the R, values of tris(beta-diketonato) complexes and the amount [% nu/nu] of acetone in hexane-acetone mobile phases, and between the R-M values of these complexes and the number of acac ligands substituted by phacphac ligands. The results obtained were compared with previously observed chromatographic behavior of the same substances on thin layers of silica gel and polyacrylonitrile. The corresponding separation mechanisms were also considered. It was assumed that under conditions of normal-phase chromatography with solvents of low polarity the retention behavior of complexes containing aromatic rings in the molecule is mainly determined by donor-acceptor interactions of the cyano groups of the adsorbent with the pi-electron systems of the substances being separated.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "JPC-Journal of Planar Chromatography-Modern TLC",
title = "Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes",
pages = "344-341",
number = "5",
volume = "15",
doi = "10.1556/JPC.15.2002.5.4",
url = "conv_144"
}
Majstorović, H., Tešić, Ž.,& Milojković-Opsenica, D.. (2002). Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes. in JPC-Journal of Planar Chromatography-Modern TLC
Springer Heidelberg, Heidelberg., 15(5), 341-344.
https://doi.org/10.1556/JPC.15.2002.5.4
conv_144
Majstorović H, Tešić Ž, Milojković-Opsenica D. Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes. in JPC-Journal of Planar Chromatography-Modern TLC. 2002;15(5):341-344.
doi:10.1556/JPC.15.2002.5.4
conv_144 .
Majstorović, Helena, Tešić, Živoslav, Milojković-Opsenica, Dušanka, "Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes" in JPC-Journal of Planar Chromatography-Modern TLC, 15, no. 5 (2002):341-344,
https://doi.org/10.1556/JPC.15.2002.5.4 .,
conv_144 .

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