The application of 1,3,5-trinitrobenzene as a spin probe for the surface basic sites study of MgAl double oxides by EPR spectroscopy

The application of 1,3,5-trinitrobenzene as a spin probe for the surface basic sites study of MgAl double oxides by EPR spectroscopy Full article

Journal

Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN: 0927-7757

Output data

Year: 2020, Volume: 596, Article number : 124733, Pages count : 9 DOI: 10.1016/j.colsurfa.2020.124733

Tags

Basicity, EPR spectroscopy, MgAl double oxide, Spin probe, 1,3,5-Trinitrobenzene radical anion

Authors

Yurpalov Vyacheslav L. ¹ , Stepanova Liudmila N. ¹ , Drozdov Vladimir A. ¹ , Belskaya Olga B. ^1,2

Affiliations

1	Center of New Chemical Technologies of the Federal Research Center Boreskov Institute of Catalysis of Siberian Branch of the Russian Academy of Sciences, 54 Neftezavodskaya St., Omsk, Russia 644040
2	Department of Chemical Technology, Omsk State Technical University, 11 Mira Av., Omsk, Russia 644050

Funding (1)

Russian Foundation for Basic Research

18-33-00131

In current work the features of 1,3,5-trinitrobenzene (TNB) transformation into paramagnetic products on the surface of aluminum/magnesium oxides calcined at 550°C, as well as MgAl double oxides, were investigated by EPR spectroscopy. It was shown that the increase of basicity (i.e. MgO content) leads to the increase in the concentration of formed radical anions, wherein the presence of acidic sites contributes to their stabilization on the surface. The effect of n-hexane and toluene used as solvents in the transformation of adsorbed TNB radical anions was established, and a new probe EPR technique for using TNB to determine the concentration of the basic sites in MgAl double oxides was proposed. The results of the proposed technique are in good agreement with the data on the basic sites concentration obtained from the adsorption capacity CO2 of the corresponding samples.

Yurpalov V.L. , Stepanova L.N. , Drozdov V.A. , Belskaya O.B.
The application of 1,3,5-trinitrobenzene as a spin probe for the surface basic sites study of MgAl double oxides by EPR spectroscopy
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2020. V.596. 124733 :1-9. DOI: 10.1016/j.colsurfa.2020.124733 WOS Scopus РИНЦ OpenAlex

Submitted:	Dec 30, 2019
Published print:	Mar 1, 2020
Accepted:	Mar 17, 2020
Published online:	Mar 19, 2020

Web of science:	WOS:000531539800002
Scopus:	2-s2.0-85082814880
Elibrary:	43259551
OpenAlex:	W3010725299

DB	Citing
Scopus	2
Web of science	2
OpenAlex	2