XPS Study of the [Ir(COD)Cl]2–L–SiO2 Catalytic System Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2025, Volume: 66, Number: 2, Pages: 248-256 Pages count : 9 DOI: 10.1134/s002315842560004x | ||||
| Tags | X-ray photoelectron spectroscopy, organometallic iridium complex, single-site supported catalyst, selective hydrogenation, pairwise addition of parahydrogen to unsaturated gaseous substrates | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | FWUR-2024-0032 |
Abstract:
The X-ray photoelectron spectroscopy (XPS) and nuclear magnetic resonance (NMR) spectroscopy were used to study the features of anchoring of the [Ir2(COD)2Cl2] complex on the surface of modified silica gel L–SiO2 (where L is NC5H5–CH2–CH2–, N(CH3)2–CH2–CH2–CH2–, NH2–C3H6–) depending on the nature of the linker and the conditions of preparation of the systems. The catalytic activity was tested in reactions of gas-phase selective hydrogenation of propylene with parahydrogen (p-H2). According to the XPS data, a single-site iridium catalyst is prepared in all cases. Analysis of the XPS spectra indicates the possibility of anchoring the complex through one of the iridium atoms while preserving the dimer. It was shown that at different durations of interaction of the iridium complex solution with modified NH2–C3H6–silica gel approximately the same amount of the complex is anchored, but the nature of the complex coordination changes. For the sample obtained by long-term interaction of the complex solution with the modified support (24 h), a high increase in the NMR signal was observed at 60°C, while in the case of the sample prepared by short-term interaction (1 h), the signal increased with a rise in temperature to 80°C.
Cite:
Nartova A.V.
, Donskikh K.G.
, Kvon R.I.
, Kovtunova L.M.
, Dmitrachkov A.M.
, Skovpin I.V.
, Koptyug I.V.
, Bukhtiyarov V.I.
XPS Study of the [Ir(COD)Cl]2–L–SiO2 Catalytic System
Kinetics and Catalysis. 2025. V.66. N2. P.248-256. DOI: 10.1134/s002315842560004x WOS Scopus AN OpenAlex
XPS Study of the [Ir(COD)Cl]2–L–SiO2 Catalytic System
Kinetics and Catalysis. 2025. V.66. N2. P.248-256. DOI: 10.1134/s002315842560004x WOS Scopus AN OpenAlex
Dates:
| Submitted: | Dec 18, 2024 |
| Accepted: | Apr 9, 2025 |
| Published online: | Aug 5, 2025 |
Identifiers:
| Web of science: | WOS:001544860300003 |
| Scopus: | 2-s2.0-105012630199 |
| Chemical Abstracts: | 2025:2004777 |
| OpenAlex: | W4412956437 |
Citing:
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