Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes
Апстракт
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.
Кључне речи:
thin-layer chromatography / CN-modified silica / separation mechanisms / (beta-diketonato)-Co(III) complexes / (beta-ketoiminato)-Cu(II) complexes / alkylxanthato complexesИзвор:
Journal of Planar Chromatography: Modern TLC / Thin Layer Chromatography, 2002, 15, 5, 341-344Издавач:
- Research Inst Medicinal Plants, Budakalasz
DOI: 10.1556/JPC.15.2002.5.4
ISSN: 0933-4173
WoS: 000180118300004
Scopus: 2-s2.0-0842326775
Колекције
Институција/група
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Majstorović, Helena AU - Tešić, Živoslav Lj. AU - Milojković-Opsenica, Dušanka PY - 2002 UR - https://cherry.chem.bg.ac.rs/handle/123456789/519 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 - Research Inst Medicinal Plants, Budakalasz T2 - Journal of Planar Chromatography: Modern TLC / Thin Layer Chromatography T1 - Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes VL - 15 IS - 5 SP - 341 EP - 344 DO - 10.1556/JPC.15.2002.5.4 ER -
@article{ author = "Majstorović, Helena and Tešić, Živoslav Lj. 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 = "Research Inst Medicinal Plants, Budakalasz", journal = "Journal of Planar Chromatography: Modern TLC / Thin Layer Chromatography", title = "Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes", volume = "15", number = "5", pages = "341-344", doi = "10.1556/JPC.15.2002.5.4" }
Majstorović, H., Tešić, Ž. Lj.,& Milojković-Opsenica, D.. (2002). Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes. in Journal of Planar Chromatography: Modern TLC / Thin Layer Chromatography Research Inst Medicinal Plants, Budakalasz., 15(5), 341-344. https://doi.org/10.1556/JPC.15.2002.5.4
Majstorović H, Tešić ŽL, Milojković-Opsenica D. Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes. in Journal of Planar Chromatography: Modern TLC / Thin Layer Chromatography. 2002;15(5):341-344. doi:10.1556/JPC.15.2002.5.4 .
Majstorović, Helena, Tešić, Živoslav Lj., Milojković-Opsenica, Dušanka, "Interpretation of the mechanisms of chromatographic separation on CN-silica. Part I: TLC of metal complexes" in Journal of Planar Chromatography: Modern TLC / Thin Layer Chromatography, 15, no. 5 (2002):341-344, https://doi.org/10.1556/JPC.15.2002.5.4 . .