Clathrate Ices—Recent Results
نویسندگان
چکیده
منابع مشابه
Clathrate hydrates in nature.
Scientific knowledge of natural clathrate hydrates has grown enormously over the past decade, with spectacular new findings of large exposures of complex hydrates on the sea floor, the development of new tools for examining the solid phase in situ, significant progress in modeling natural hydrate systems, and the discovery of exotic hydrates associated with sea floor venting of liquid CO2. Majo...
متن کاملPolymorphism in Br2 clathrate hydrates.
The structure and composition of bromine clathrate hydrate has been controversial for more than 170 years due to the large variation of its observed stoichiometries. Several different crystal structures were proposed before 1997 when Udachin et al. (Udachin, K. A.; Enright, G. D.; Ratcliffe, C. I.; Ripmeester, J. A. J. Am. Chem. Soc. 1997, 119, 11481) concluded that Br2 forms only the tetragona...
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The crystal engineering design of new clathrate hosts that employ intermolecular attractive forces much weaker than hydrogen bonding and coordination complexation remains problematic. One approach has been to prepare a series of V-shaped molecules with C2symmetry, a small degree of conformational freedom, and protruding halogen atoms. This design has been highly successful (95%), but little pre...
متن کاملDesorption kinetics of a xanthenol-dioxane clathrate.
The host xanthenol compound forms a 1:1 clathrate with dioxane, namely 9-(1-naphthyl)-9H-xanthen-9-ol-1,4-dioxane, C23H16O2.C4H8O2. The structure of this clathrate is reported, along with a study of the kinetics of desolvation and the determination of an activation energy. The guest molecules are stabilized by O(host)-H...O(guest) hydrogen bonds [O-H = 0.968 (2) A, O...O = 2.7532 (13) A and O-H...
متن کاملEarth Abundant Element Type I Clathrate Phases
Earth abundant element clathrate phases are of interest for a number of applications ranging from photovoltaics to thermoelectrics. Silicon-containing type I clathrate is a framework structure with the stoichiometry A8-xSi46 (A = guest atom such as alkali metal) that can be tuned by alloying and doping with other elements. The type I clathrate framework can be described as being composed of two...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1978
ISSN: 0022-1430,1727-5652
DOI: 10.1017/s0022143000033281