Understanding Microwave-Assisted Lignin Solubilization in Protic Ionic Liquids with Multiaromatic Imidazolium Cations

Omar Merino; Gabriela Fundora-Galano; Rafael Luque; Rafael Martínez-Palou

doi:10.1021/acssuschemeng.7b04535

Understanding Microwave-Assisted Lignin Solubilization in Protic Ionic Liquids with Multiaromatic Imidazolium Cations

Omar Merino, Gabriela Fundora-Galano, Rafael Luque, Rafael Martínez-Palou

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

22 Scopus citations

Abstract

The low solubility of lignin in most common solvents remains a significant challenge to be solved for its use and recovery. In this work, 18 novel protic ionic liquids (ILs) containing aromatic-substituted imidazolium cations and methanesulfonate and p-toluenesulfonate anions were synthesized and evaluated for lignin dissolution under microwave irradiation. ILs containing methanesulfonate demonstrated good lignin dissolving capacities, which can facilitate its separation and structural modifications to carry out their recovery under relatively mild and environmentally friendly conditions (few minutes, 90 °C). DFT theoretical calculations provided additional insights into the high lignin dissolution observed for the best performing ILs.

Original language	English
Pages (from-to)	4122-4129
Number of pages	8
Journal	ACS Sustainable Chemistry and Engineering
Volume	6
Issue number	3
DOIs	https://doi.org/10.1021/acssuschemeng.7b04535
State	Published - 5 Mar 2018
Externally published	Yes

Keywords

Ionic liquids
Lignin
Microwave
Multiaromatic cation
Solubilization

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acssuschemeng.7b04535

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title = "Understanding Microwave-Assisted Lignin Solubilization in Protic Ionic Liquids with Multiaromatic Imidazolium Cations",

abstract = "The low solubility of lignin in most common solvents remains a significant challenge to be solved for its use and recovery. In this work, 18 novel protic ionic liquids (ILs) containing aromatic-substituted imidazolium cations and methanesulfonate and p-toluenesulfonate anions were synthesized and evaluated for lignin dissolution under microwave irradiation. ILs containing methanesulfonate demonstrated good lignin dissolving capacities, which can facilitate its separation and structural modifications to carry out their recovery under relatively mild and environmentally friendly conditions (few minutes, 90 °C). DFT theoretical calculations provided additional insights into the high lignin dissolution observed for the best performing ILs.",

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author = "Omar Merino and Gabriela Fundora-Galano and Rafael Luque and Rafael Mart{\'i}nez-Palou",

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T1 - Understanding Microwave-Assisted Lignin Solubilization in Protic Ionic Liquids with Multiaromatic Imidazolium Cations

AU - Merino, Omar

AU - Fundora-Galano, Gabriela

AU - Luque, Rafael

AU - Martínez-Palou, Rafael

PY - 2018/3/5

Y1 - 2018/3/5

N2 - The low solubility of lignin in most common solvents remains a significant challenge to be solved for its use and recovery. In this work, 18 novel protic ionic liquids (ILs) containing aromatic-substituted imidazolium cations and methanesulfonate and p-toluenesulfonate anions were synthesized and evaluated for lignin dissolution under microwave irradiation. ILs containing methanesulfonate demonstrated good lignin dissolving capacities, which can facilitate its separation and structural modifications to carry out their recovery under relatively mild and environmentally friendly conditions (few minutes, 90 °C). DFT theoretical calculations provided additional insights into the high lignin dissolution observed for the best performing ILs.

AB - The low solubility of lignin in most common solvents remains a significant challenge to be solved for its use and recovery. In this work, 18 novel protic ionic liquids (ILs) containing aromatic-substituted imidazolium cations and methanesulfonate and p-toluenesulfonate anions were synthesized and evaluated for lignin dissolution under microwave irradiation. ILs containing methanesulfonate demonstrated good lignin dissolving capacities, which can facilitate its separation and structural modifications to carry out their recovery under relatively mild and environmentally friendly conditions (few minutes, 90 °C). DFT theoretical calculations provided additional insights into the high lignin dissolution observed for the best performing ILs.

KW - Ionic liquids

KW - Lignin

KW - Microwave

KW - Multiaromatic cation

KW - Solubilization

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DO - 10.1021/acssuschemeng.7b04535

M3 - Artículo

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SN - 2168-0485

VL - 6

SP - 4122

EP - 4129

JO - ACS Sustainable Chemistry and Engineering

JF - ACS Sustainable Chemistry and Engineering

IS - 3

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Understanding Microwave-Assisted Lignin Solubilization in Protic Ionic Liquids with Multiaromatic Imidazolium Cations

Abstract

Keywords

UN SDGs

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