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Vol. 38 No. 2 (2026): Vol 38 Issue 2, 2026

Copyright (c) 2026 Priya Vimal, V. Gayathri

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Polymer Immobilised Mn(II) Complex as Efficient Catalyst for High-Value Fuel Production from Hydrodeoxygenation of Bisphenol A

https://doi.org/10.14233/ajchem.2026.35111
Priya Vimal
Department of Studies and Research in Chemistry, Dr. Manmohan Singh Bengaluru City University, Dr. Ambedkar Veedhi Road, Jnana Jyothi Central College Campus, Bengaluru-560001, India
https://orcid.org/0009-0008-1967-6867
V. Gayathri
Department of Studies and Research in Chemistry, Dr. Manmohan Singh Bengaluru City University, Dr. Ambedkar Veedhi Road, Jnana Jyothi Central College Campus, Bengaluru-560001, India
https://orcid.org/0000-0001-6207-6463

Corresponding Author(s) : V. Gayathri

gayathritvr@yahoo.co.in

Asian Journal of Chemistry, Vol. 38 No. 2 (2026): Vol 38 Issue 2, 2026

Abstract

A polymer-supported manganese(II) complex, PS-[Mn(L-H)(Cl)2], along with its unsupported analogue [Mn(L-H2)2(Cl)2], was synthesised and systematically characterised using elemental analysis, FT-IR, UV-Vis diffuse reflectance spectroscopy, EDAX, magnetic susceptibility measurements and thermogravimetric analysis. Spectroscopic and magnetic data indicated a tetrahedral geometry for the polymer-supported complex and an octahedral environment for the unsupported analogue, with the ligand coordinating in a bidentate chelating mode. The catalytic performance of both complexes was evaluated in the selective hydrodeoxygenation of substituted phenols, with 4,4'-(propane-2,2-diyl)diphenol (BPA) employed as a model substrate. Reaction parameters such as solvent, temperature, catalyst loading, hydrogen pressure, reaction time and substrate concentration were systematically optimised. The polymer-supported catalyst exhibited superior activity, achieving up to 99% BPA conversion with high selectivity toward propane-2,2-diyldicyclohexane under mild conditions, while the unsupported complex showed lower activity and poor recyclability. The enhanced catalytic performance is attributed to effective metal immobilisation, improved accessibility of active sites and the heterogeneous nature of the supported system. Catalyst reusability studies confirmed stable performance over multiple cycles with negligible manganese leaching, supported by ICP-OES analysis and hot filtration tests. A plausible reaction pathway for BPA hydrodeoxygenation was proposed based on control experiments and product distribution.

Keywords

Polymer supported catalyst Hydrodeoxygenation Heterogeneous complex Jet fuel
(1)
Vimal, P.; Gayathri, V. Polymer Immobilised Mn(II) Complex As Efficient Catalyst for High-Value Fuel Production from Hydrodeoxygenation of Bisphenol A. ajc 2026, 38, 552-560.
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