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PreprintCC BY-NC-NDChemRxiv

Adsorption and Separation of Dihydroxybenzenes by Colorimetric Molecular Adsorbing Host•Guest Crystals

  • Melvin Raulin1
  • Eric Merlet2
  • Florian Ferrer3
  • Isabelle Braccini3
  • Didier Siri4
  • Brice Kauffmann5
  • Xinyu Fang6
  • Jérôme Wenger6
  • Alexandre Martinez1
  • Anthony Kermagoret7
  • Yann Ferrand2
  • David Bardelang1
7 affiliations
  1. 1Aix Marseille Univ, CNRS, iSm2, AMUtech
  2. 2Bordeaux Institut National Polytechnique, CBMN (UMR 5248)
  3. 3Aix Marseille Univ, CNRS, Centrale Marseille, FSCM, Spectropole
  4. 4Aix-Marseille Univ, CNRS, ICR, AMUtech
  5. 5Institut Européen de Chimie et Biologie (UAR3033/US001)
  6. 6Aix-Marseille Univ, CNRS, Centrale Med, Institut Fresnel, AMUTech
  7. 7Aix-Marseille Univ, CNRS, CINaM, AMUtech
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Abstract

Hydrogen-bonded Organic Frameworks (HOFs) form a rapidly expanding alternative to Metal Organic Frameworks (MOFs). Among HOFs, the Molecular Adsorbing Host•Guest ( MAHG ) crystals introduced here combine cucurbit[8]uril (CB[8]) macrocycles and a tetraacid derivative of diphenyl-viologen (TETRAC). Despite their non-porous crystalline framework, MAHG crystals enable the diffusion of dihydroxybenzenes (DHB), which tend to localize in specific crystalline sites. The diffusion of DHB inside the permeable crystals is followed by striking color changes related to the formation of charge-transfer (CT) complexes between the electron-rich DHB and the electron-poor viologen units confined within the CB[8] cavities. Kinetic and crystallographic studies indicate the possible separation of DHB mixtures. This work highlights the potential of MAHG crystals for the rapid detection of DHB via colorimetric changes and their separation in water, offering a promising approach for industrial applications dedicated to hydroquinone and catechol production.

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Cite

BibTeXRIS
BibTeX
@misc{raulin2026adsorption,
  title = {{Adsorption and Separation of Dihydroxybenzenes by Colorimetric Molecular Adsorbing Host•Guest Crystals}},
  author = {Melvin Raulin and Eric Merlet and Florian Ferrer and Isabelle Braccini and Didier Siri and Brice Kauffmann and Xinyu Fang and Jérôme Wenger and Alexandre Martinez and Anthony Kermagoret and Yann Ferrand and David Bardelang},
  howpublished = {ChemRxiv},
  year = {2026},
  month = oct,
  doi = {10.26434/chemrxiv-2026-np9zk/v2},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv-2026-np9zk/v2},
  note = {CC BY-NC-ND},
}
RIS
TY  - UNPB
TI  - Adsorption and Separation of Dihydroxybenzenes by Colorimetric Molecular Adsorbing Host•Guest Crystals
AU  - Melvin Raulin
AU  - Eric Merlet
AU  - Florian Ferrer
AU  - Isabelle Braccini
AU  - Didier Siri
AU  - Brice Kauffmann
AU  - Xinyu Fang
AU  - Jérôme Wenger
AU  - Alexandre Martinez
AU  - Anthony Kermagoret
AU  - Yann Ferrand
AU  - David Bardelang
PY  - 2026
DA  - 2026/10/08
PB  - ChemRxiv
DO  - 10.26434/chemrxiv-2026-np9zk/v2
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv-2026-np9zk/v2
AB  - Hydrogen-bonded Organic Frameworks (HOFs) form a rapidly expanding alternative to Metal Organic Frameworks (MOFs). Among HOFs, the Molecular Adsorbing Host•Guest ( MAHG ) crystals introduced here combine cucurbit[8]uril (CB[8]) macrocycles and a tetraacid derivative of diphenyl-viologen (TETRAC). Despite their non-porous crystalline framework, MAHG crystals enable the diffusion of dihydroxybenzenes (DHB), which tend to localize in specific crystalline sites. The diffusion of DHB inside the permeable crystals is followed by striking color changes related to the formation of charge-transfer (CT) complexes between the electron-rich DHB and the electron-poor viologen units confined within the CB[8] cavities. Kinetic and crystallographic studies indicate the possible separation of DHB mixtures. This work highlights the potential of MAHG crystals for the rapid detection of DHB via colorimetric changes and their separation in water, offering a promising approach for industrial applications dedicated to hydroquinone and catechol production.
ER  -