Chromatographic analysis of orchid extracts and quantum chemical calculations of individual components interaction with silica
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543.544:582.594.2 (1)
Physicochemical methods of analysis (other than optical methods) (59)
Systematic botany (855)
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KAZAKOVA, Olga, IVANNIKOV, Roman, LAGUTA, Iryna, STAVINSKAYA, Oksana, ANISHCHENKO, Viktor, SEVERINOVSKA, Olga, BUYUN, Ludmila. Chromatographic analysis of orchid extracts and quantum chemical calculations of individual components interaction with silica. In: Chemistry Journal of Moldova, 2020, nr. 1(15), pp. 95-102. ISSN 1857-1727. DOI: https://doi.org/10.19261/cjm.2019.694
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Chemistry Journal of Moldova
Numărul 1(15) / 2020 / ISSN 1857-1727 /ISSNe 2345-1688

Chromatographic analysis of orchid extracts and quantum chemical calculations of individual components interaction with silica

DOI:https://doi.org/10.19261/cjm.2019.694
CZU: 543.544:582.594.2

Pag. 95-102

Kazakova Olga1, Ivannikov Roman2, Laguta Iryna1, Stavinskaya Oksana1, Anishchenko Viktor3, Severinovska Olga1, Buyun Ludmila2
 
1 Chuiko Institute of Surface Chemistry, National Academy of Science of Ukraine,
2 M. M. Gryshko National Botanical Garden of National Academy of Sciences of Ukraine,
3 L. M. Litvinenko Institute of Physical-Organic Chemistry and Coal Chemistry
 
 
Disponibil în IBN: 2 iulie 2020


Rezumat

The aim of the work was to identify the main components of orchid extracts and to study their interaction with silica. Composition of sixteen orchid extracts was investigated by means of high performance liquid chromatography and laser desorption/ionization mass spectrometry; as it was shown in this study, flavonoids and phenolic acids were the main bioactive compounds available in the extracts. The interaction between various phenols and silica silanol groups was studied by quantum chemical method. Results show that the strength of interaction of phenols with silica increased in the following order: ferullic, feruloylquinic and fertaric acids< kaempferol, apingenin<< сhlorogenic and caffeic acids, rhamnetin, quercetin, luteolin, epicatechin gallate. The common feature of compounds characterized by the strongest interaction with silanol groups is the presence of a phenol ring with two neighbouring hydroxyl groups. The hydrogen bonds formed between these groups and silanol groups are much shorter (about 0.17 nm) than those formed by other hydroxyl groups of phenols (up to 0.28 nm).

Cuvinte-cheie
orchid extract, phenolic compound, Fumed silica, quantum chemical calculation