1
|
Erkhova LV, Presniakov IA, Afanasov MI, Lemenovskiy DA, Yu H, Wang L, Danilson M, Koel M. Ferrocene Introduced into 5-Methylresorcinol-Based Organic Aerogels. Polymers (Basel) 2020; 12:E1582. [PMID: 32708747 PMCID: PMC7407292 DOI: 10.3390/polym12071582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/15/2020] [Accepted: 07/15/2020] [Indexed: 11/16/2022] Open
Abstract
The polycondensation sol-gel reaction of 5-methylresocinol and formaldehyde with additional compounds in reaction media is a relatively simple way to produce modified aerogels. In order to obtain aerogels with a large surface area and high porosity, the conditions for gel formation, the solvent exchange process before drying, and the supercritical drying process were optimized. A successful attempt was made to introduce ferrocene units into 5-methylresocinol-formaldehyde-based aerogels. The resulting aerogels are amorphous substrates, and no aggregated ferrocene units were found in their structures. All of the aerogel samples that were obtained are structurally similar despite differences in the original ferrocene units and their initial concentration. It was found that the inclusion limit of ferrocene structural blocks into an aerogel is ~6% wt. The structures of the inclusions in which all of the Fe atoms in the aerogel substrates were present in ferrocene/ferrocenium at an approximate ratio of 60/40 to 55/45 were confirmed by X-ray photoelectron spectroscopy and Mössbauer spectroscopy. Aerogels with ferrocene/ferrocenium inclusions are likely to exhibit reversible redox activity in reactions with gaseous reagents.
Collapse
Affiliation(s)
- Ludmila V. Erkhova
- Department of Chemistry, Moscow State University, Lenin Hills, 1\3, 119991 Moscow, Russia; (L.V.E.); (I.A.P.); (M.I.A.); (D.A.L.)
| | - Igor A. Presniakov
- Department of Chemistry, Moscow State University, Lenin Hills, 1\3, 119991 Moscow, Russia; (L.V.E.); (I.A.P.); (M.I.A.); (D.A.L.)
| | - Michail I. Afanasov
- Department of Chemistry, Moscow State University, Lenin Hills, 1\3, 119991 Moscow, Russia; (L.V.E.); (I.A.P.); (M.I.A.); (D.A.L.)
| | - Dmitry A. Lemenovskiy
- Department of Chemistry, Moscow State University, Lenin Hills, 1\3, 119991 Moscow, Russia; (L.V.E.); (I.A.P.); (M.I.A.); (D.A.L.)
| | - Haojie Yu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; (H.Y.); (L.W.)
| | - Li Wang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; (H.Y.); (L.W.)
| | - Mati Danilson
- Department of Material and Environmental Technology, School of Engineering, Tallinn University of Technology, Ehitajate 5, 19086 Tallinn, Estonia;
| | - Mihkel Koel
- Department of Chemistry and Biotechnology, School of Science; Tallinn University of Technology, Ehitajate 5; 19086 Tallinn, Estonia
| |
Collapse
|