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Vanadyl Porphyrin: Efficient Spin Probe to Study the Alumina Surface of Supported Catalysts. / Chetkova, Anna G.; Trukhan, Sergey N.; Martyanov, Oleg N.

In: Applied Magnetic Resonance, Vol. 55, No. 10, 10.2024, p. 1293-1306.

Research output: Contribution to journal › Article › peer-review

Harvard

Chetkova, AG, Trukhan, SN & Martyanov, ON 2024, 'Vanadyl Porphyrin: Efficient Spin Probe to Study the Alumina Surface of Supported Catalysts', Applied Magnetic Resonance, vol. 55, no. 10, pp. 1293-1306. https://doi.org/10.1007/s00723-024-01681-9

APA

Chetkova, A. G., Trukhan, S. N., & Martyanov, O. N. (2024). Vanadyl Porphyrin: Efficient Spin Probe to Study the Alumina Surface of Supported Catalysts. Applied Magnetic Resonance, 55(10), 1293-1306. https://doi.org/10.1007/s00723-024-01681-9

Vancouver

Chetkova AG, Trukhan SN, Martyanov ON. Vanadyl Porphyrin: Efficient Spin Probe to Study the Alumina Surface of Supported Catalysts. Applied Magnetic Resonance. 2024 Oct;55(10):1293-1306. doi: 10.1007/s00723-024-01681-9

Author

Chetkova, Anna G. ; Trukhan, Sergey N. ; Martyanov, Oleg N. / Vanadyl Porphyrin: Efficient Spin Probe to Study the Alumina Surface of Supported Catalysts. In: Applied Magnetic Resonance. 2024 ; Vol. 55, No. 10. pp. 1293-1306.

BibTeX

@article{aa22321440794554bf13b2e2602cbbdd,
title = "Vanadyl Porphyrin: Efficient Spin Probe to Study the Alumina Surface of Supported Catalysts",
abstract = "The EPR method and vanadyl tetraphenylporphyrin complex (VOTPP) as a spin probe were employed to study the transformation of the γ-Al2O3 surface during temperature treatment. It has been shown that VOTPP complex is stable at least up to a temperature of 450 °C and ≲ 3 Pa. Four distinct forms of vanadyl complex were identified on the γ-Al2O3 surface, depending on the annealing temperature. The intensity ratio between these forms, exhibiting significantly different spin-Hamiltonian parameters, depend on the degree of surface hydration, which in turn determines the ratio between sites with different acidity on the γ-Al2O3 surface. It has been shown that VOTPP complex demonstrate reversible transitions between different adsorption forms on the alumina surface during dehydration/hydration cycles. The observed phenomenon can be explained by the coordination vanadyl spin probe along the axial axis to the surface centers of different polarity/acidity.",
author = "Chetkova, {Anna G.} and Trukhan, {Sergey N.} and Martyanov, {Oleg N.}",
note = "This research was funded by the Russian Science Foundation (Project No. 24-13-00208, https://rscf.ru/project/24-13-00208/ ).",
year = "2024",
month = oct,
doi = "10.1007/s00723-024-01681-9",
language = "English",
volume = "55",
pages = "1293--1306",
journal = "Applied Magnetic Resonance",
issn = "0937-9347",
publisher = "Springer-Verlag GmbH and Co. KG",
number = "10",

}

RIS

TY - JOUR

T1 - Vanadyl Porphyrin: Efficient Spin Probe to Study the Alumina Surface of Supported Catalysts

AU - Chetkova, Anna G.

AU - Trukhan, Sergey N.

AU - Martyanov, Oleg N.

N1 - This research was funded by the Russian Science Foundation (Project No. 24-13-00208, https://rscf.ru/project/24-13-00208/ ).

PY - 2024/10

Y1 - 2024/10

N2 - The EPR method and vanadyl tetraphenylporphyrin complex (VOTPP) as a spin probe were employed to study the transformation of the γ-Al2O3 surface during temperature treatment. It has been shown that VOTPP complex is stable at least up to a temperature of 450 °C and ≲ 3 Pa. Four distinct forms of vanadyl complex were identified on the γ-Al2O3 surface, depending on the annealing temperature. The intensity ratio between these forms, exhibiting significantly different spin-Hamiltonian parameters, depend on the degree of surface hydration, which in turn determines the ratio between sites with different acidity on the γ-Al2O3 surface. It has been shown that VOTPP complex demonstrate reversible transitions between different adsorption forms on the alumina surface during dehydration/hydration cycles. The observed phenomenon can be explained by the coordination vanadyl spin probe along the axial axis to the surface centers of different polarity/acidity.

AB - The EPR method and vanadyl tetraphenylporphyrin complex (VOTPP) as a spin probe were employed to study the transformation of the γ-Al2O3 surface during temperature treatment. It has been shown that VOTPP complex is stable at least up to a temperature of 450 °C and ≲ 3 Pa. Four distinct forms of vanadyl complex were identified on the γ-Al2O3 surface, depending on the annealing temperature. The intensity ratio between these forms, exhibiting significantly different spin-Hamiltonian parameters, depend on the degree of surface hydration, which in turn determines the ratio between sites with different acidity on the γ-Al2O3 surface. It has been shown that VOTPP complex demonstrate reversible transitions between different adsorption forms on the alumina surface during dehydration/hydration cycles. The observed phenomenon can be explained by the coordination vanadyl spin probe along the axial axis to the surface centers of different polarity/acidity.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85198737219&origin=inward&txGid=f4e60daaa4ac0bb793a6df25d9aa4b96

UR - https://www.mendeley.com/catalogue/57b38f35-29e8-3846-899b-c9626d7f9afa/

U2 - 10.1007/s00723-024-01681-9

DO - 10.1007/s00723-024-01681-9

M3 - Article

VL - 55

SP - 1293

EP - 1306

JO - Applied Magnetic Resonance

JF - Applied Magnetic Resonance

SN - 0937-9347

IS - 10

ER -

ID: 60795479