CO2–Hydroquinone Clathrate: Synthesis, Purification, Characterization and Crystal Structure

Jean-Philippe Torre (1) , R. Coupan (1) , M. Chabod (1) , Eve Péré (2) , Stephane Labat (2) , Abdel Khoukh (2) , Ross Brown (2) , Jean-Marc Sotiropoulos (2) , Heinz Gornitzka (3, 4, 5)

1 LFCR - Laboratoire des Fluides Complexes et leurs Réservoirs
2 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
3 LCC - Laboratoire de chimie de coordination
4 Toulouse INP - Institut National Polytechnique (Toulouse)
5 UT3 - Université Toulouse III - Paul Sabatier

Organic clathrate compounds, particularly those formed between hydroquinone (HQ) and gases, are supramolecular entities recently highlighted as promising alternatives for applications such as gas storage and separation processes. This study provides new insights into CO2–HQ clathrate, which is a key structure in some of the proposed future applications of these compounds. We present a novel synthesis and purification of CO2–HQ clathrate monocrystals. Clathrate crystals obtained from a single synthesis and native HQ are characterized and compared using Raman/Fourier transform infrared/NMR spectroscopies, optical microscopy, and thermogravimetric analysis coupled to mass spectrometry. The molecular structure of the clathrate has been resolved by X-ray diffraction analysis, and detailed crystallographic information is presented for the first time.

Mots clés: Crystal Structure; Purification; Synthesis; Characterization

Domaines: Cristallographie

Jean-Philippe Torre, R. Coupan, M. Chabod, Eve Péré, Stephane Labat, et al.. CO2–Hydroquinone Clathrate: Synthesis, Purification, Characterization and Crystal Structure. Crystal Growth & Design, 2016, 16 (9), pp.5330-5338. ⟨10.1021/acs.cgd.6b00834⟩. ⟨hal-01581870⟩