@article{ddcea665c4d2410cad5e47ed38e590e7,
title = "Catalytic effect of different hydroxyl-functionalised ionic liquids together with Zn(II) complex in the synthesis of cyclic carbonates from CO2",
abstract = "Quaternary ammonium salts bearing different alkyl chains and hydroxyl groups were synthesized and tested for the first time as co-catalysts in the cycloaddition reaction between CO2 and propylene oxide. Their synergetic catalytic effect together with the known tetranuclear zinc(II) complex [Zn4(μ3-OH)2 (1κO:2κO-HL)4(κO-HL)2(H2O)4] (1), H2L = 3-(2-carboxyphenyl-hydrazone)pentane-2,4-dione, was investigated at 60 °C and 4 MPa. Results obtained highlight the importance of exploring the hydrogen bonding effect via functionalization with hydroxyl groups but show that the length of the alkyl chains of the ammonium cation is a more relevant factor affecting the reaction kinetic for the system studied.",
keywords = "arylhydrazones of B-diketones, catalysis, CO utilization, epoxides, ionic liquids, organic carbonates, propylene carbonate",
author = "Paninho, {Ana B.} and Andreia Forte and Zakrzewska, {Malgorzata E.} and Mahmudov, {Kamran T.} and Pombeiro, {Armando J. L.} and {da Silva}, {M. F{\'a}tima C. Guedes} and {Nunes da Ponte}, Manuel and Branco, {Lu{\'i}s C.} and Nunes, {Ana V. M.}",
note = "This work was supported by Fundacao para a Ciencia e Tecnologia FCT/MCTESprojects PTDC/EQU-EPQ/31926/2017, UIDB/50006/2020 of the Associate Laboratory for Green Chemistry - LAQV, and UIDB/00100/2020 of the Centro de Quimica Estrutural - CQE. The authors also thanks to the project {"}SunStorage: Harvesting and storage of solar energy{"}, with reference POCI-01-0145-FEDER-016387, funded by European Regional Development Fund (ERDF), through COMPETE 2020Operational Programme for Competitiveness and Internationalisation (OPCI). A.V.M. Nunes is thankful to FCT/MCTES for contract IF/01374/2014. K.T. Mahmudov acknowledges the FCT/MCTES and IST for DL 57/2016 and L 57/2017 Program and for contract IST-ID/85/2018. M.E. Zakrzewska is thankful to FCT/MCTES for the postdoctoral grant SFRH/BPD/122655/2016. The NMR spectrometers at FCT NOVA are part of Rede Nacional de RMN (PTNMR), supported by FCT/MCTES through ROTEIRO/0031/2013 -PINFRA/22161/2016 and co-financed by FEDER through COMPETE 2020, POCI, and PORL and FCT through PIDDAC.",
year = "2021",
month = jan,
doi = "10.1016/j.mcat.2020.111292",
language = "English",
volume = "499",
journal = "Molecular Catalysis",
issn = "2468-8231",
publisher = "Elsevier BV",
}