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Clathrate hydrates with hydrogen-bonding guests
Physical Chemistry Chemical Physics, 2009Clathrate hydrates (CHs) are inclusion compounds in which "tetrahedrally" bonded H(2)O forms a crystalline host lattice composed of a periodic array of cages. The structure is stabilized by guest particles which occupy the cages and interact with cage walls via van der Waals interactions.
Monreal, I. Abrrey +5 more
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Hydrogen in Porous Tetrahydrofuran Clathrate Hydrate
ChemPhysChem, 2008AbstractThe lack of practical methods for hydrogen storage is still a major bottleneck in the realization of an energy economy based on hydrogen as energy carrier. Storage within solid‐state clathrate hydrates,– and in the clathrate hydrate of tetrahydrofuran (THF), has been recently reported., In the latter case, stabilization by THF is claimed to ...
Mulder, FM +3 more
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Hydrophobic Hydration and the Formation of a Clathrate Hydrate
Physical Review Letters, 1998We report a direct comparison of the local structure of the hydrophobic hydration of krypton in both the liquid and solid states by the extended x-ray absorption fine structure spectroscopy technique. The evolution of an ordered hydration shell of the nonpolar gas moiety is followed as the liquid to solid phase transition progresses. The formation of a
D. T. BOWRON +3 more
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A complex clathrate hydrate structure showing bimodal guest hydration
Nature, 1999Interactions between hydrophobic groups in water, as well as biomolecular hydration more generally, are intimately connected to the structure of liquid water around hydrophobic solutes. Such considerations have focused interest on clathrate hydrates: crystals in which a hydrogen-bonded network of water molecules encages hydrophobic guest molecules with
K A, Udachin, J A, Ripmeester
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A Clathrate Hydrate of Formaldehyde
The Journal of Physical Chemistry, 1996Clathrate hydrates, crystalline ices with voids suitable for guest molecules, occur naturally on earth with hydrocarbons, CO2, O2, N2, and H2S as guests and have been proposed to occur in extraterrestrial environments as well. Here we report a clathrate hydrate of formaldehyde prepared by vapor deposition of water vapor and formaldehyde generated by ...
J. A. Ripmeester, L. Ding, D. D. Klug
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Thermodynamic studies of clathrate hydrates
Journal of Thermal Analysis, 1989Thermodynamic studies of clathrate hydrates, mainly of structures I and II, are considered in this review which is based on 147 references. There are two main subjects. The first is the host lattice energy and the guest-host interaction energy, both of these quantities being related to the enthalpy of dissociation and composition of the hydrates.
Osamu Yamamuro, Hiroshi Suga
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The Clathrate Hydrates of Gases
2011The second chapter introduces the reader to the world of gas hydrates. Starting with the simplest overview, and including more advanced details, the chapter answers what gas hydrates are, where they are found, and man’s progression of knowledge of these materials from their discovery to the current state of the art.
Carlo Giavarini, Keith Hester
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Clathrate hydrates of triisoamylbutylammonium iodide
Russian Journal of Inorganic Chemistry, 2007The phase diagram of the (i-C5H11)3C4H9NI−H2O system is reported. Triisoamylbutylammonium iodide forms polyhydrates with hydration numbers of 36 (mp 12.5°C) and 32 (mp 13.2°C) and a dihydrate. Crystals of both polyhdrates have been isolated, and their compositions have been determined.
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Nucleation Mechanisms of Clathrate Hydrates
2006A simple universal model of formation of clathrate crystal nuclei in solution is suggested. The model is applicable equally to all clathrate materials: gas hydrates, cage zeolites (clathrasils) and clathrate compounds of semiconductor elements. The basic feature of the model is joining of polyhedral cage precursors, formed around guest molecules, by ...
A. A. Pomeransky +2 more
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