Letteratura scientifica selezionata sul tema "Clathrate compounds"

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Articoli di riviste sul tema "Clathrate compounds"

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Celli, Milva, Daniele Colognesi, Alessandra Giannasi, Lorenzo Ulivi, Marco Zoppi, Victoria Garcia Sakai, and Aníbal Javier Ramírez-Cuesta. "Simple and Binary Hydrogen Clathrate Hydrates: Synthesis and Microscopic Characterization through Neutron and Raman Scattering." Advances in Science and Technology 72 (October 2010): 196–204. http://dx.doi.org/10.4028/www.scientific.net/ast.72.196.

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The search for efficient hydrogen-storage materials has led to an increasing interest in hydrogen clathrate hydrates, since it has been demonstrated that an appreciable amount of molecular hydrogen can be stored in the water cages and released at melting. Different synthetic routes have been followed to maximize the quantity of trapped hydrogen and to speed up the kinetics of the clathrate formation. Here, we describe two different synthetic routes for the production of hydrogen clathrate hydrates. Then we present the results of inelastic neutron scattering and Raman light scattering experimen
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Li, De Cong, and Hai Rong Wang. "Structural and Electrical Transport Properties of the Type-I Clathrate Phase Ba8Ga16InxGe30-x." Advanced Materials Research 833 (November 2013): 343–48. http://dx.doi.org/10.4028/www.scientific.net/amr.833.343.

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Thermoelectric (TE) devices are increasingly being seen as having the potential to make important contributions to reducing greenhouse gas emissions and providing cleaner forms of energy. A number of articles have been devoted to the thermoelectric properties of materials. From the search for novel and effective thermoelectric materials the clathrate structures has emerged as one of the most promising candidates for achieving very high thermoelectric figure of merit: ZT= α2σT/κ, where α, T, σ and κ are the Seebeck coefficient, absolute temperature, electrical conductivity, and total thermal co
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Momma, Koichi. "Clathrate compounds of silica." Journal of Physics: Condensed Matter 26, no. 10 (February 19, 2014): 103203. http://dx.doi.org/10.1088/0953-8984/26/10/103203.

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Tsapko, Yu L. "Discussion problems of humus nature." Fundamental and Applied Soil Science 16, no. 3-4 (October 25, 2015): 83–89. http://dx.doi.org/10.15421/041521.

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The article is based on a generalization of the author's prior research and review of scientific sources, discussion questions about the nature of humus are put and in particular the latest structural views on the structure of humus are given. Is emphasized that despite the long experience of studying soil humus question its structural buildings has not been studied. Nowadays the scientific community there are a number of different and often antagonistic hypotheses on which the structure of humus is significantly different. Based on the features of genetic connection between fulvic and humic a
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Huang, Yingying, Chongqin Zhu, Lu Wang, Xiaoxiao Cao, Yan Su, Xue Jiang, Sheng Meng, Jijun Zhao, and Xiao Cheng Zeng. "A new phase diagram of water under negative pressure: The rise of the lowest-density clathrate s-III." Science Advances 2, no. 2 (February 2016): e1501010. http://dx.doi.org/10.1126/sciadv.1501010.

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Ice and ice clathrate are not only omnipresent across polar regions of Earth or under terrestrial oceans but also ubiquitous in the solar system such as on comets, asteroids, or icy moons of the giant planets. Depending on the surrounding environment (temperature and pressure), ice alone exhibits an exceptionally rich and complicated phase diagram with 17 known crystalline polymorphs. Water molecules also form clathrate compounds with inclusion of guest molecules, such as cubic structure I (s-I), cubic structure II (s-II), hexagonal structure H (s-H), tetragonal structure T (s-T), and tetragon
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Belosludov, V. R., O. S. Subbotin, D. S. Krupskii, O. V. Prokuda, R. V. Belosludov, and Y. Kawazoe. "Microscopic model of clathrate compounds." Journal of Physics: Conference Series 29 (January 1, 2006): 1–7. http://dx.doi.org/10.1088/1742-6596/29/1/001.

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Nagao, Jiro. "C151 Research on Clathrate Compounds." Proceedings of the Thermal Engineering Conference 2006 (2006): 103–4. http://dx.doi.org/10.1299/jsmeted.2006.103.

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Bock, Hans, Norbert Nagel, and Peter Eller. "Wechselwirkungen in Molekülkristallen, 153 [1 - 3]. Wirt/Gast-Einschlußverbindungen von N,N'-Ditosyl-p-phenylendiamin-Derivaten: Die Kristallstrukturen von N,N'-Di(4-ethyl-benzosulfuryl)-p-phenylendiamin und seinen Aggregaten mit Aceton und Cyclopentanon / Interactions in Molecular Crystals, 153 [1 - 3]. Host/Guest-Inclusion Compounds of N,N'-Ditosyl-p-phenylenediamine Derivatives: The Crystal Structures of N,N'-Di(4-ethyl-benzosulfuryl)-p-phenylenediamine and its Aggregates with Acetone and Cyclopentanone." Zeitschrift für Naturforschung B 54, no. 4 (April 1, 1999): 491–500. http://dx.doi.org/10.1515/znb-1999-0413.

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A class of novel inclusion compounds based on the hydrogen-bonded host lattice of N,N′- ditosyl-p-phenylenediamine is the starting point for the investigation of derivatives such as N,N′- di(4-ethyl-benzosulfuryl)-p-phenylenediamine. Structures of both the guest-free compound and of its clathrates with acetone as well as cyclopentanone suggest a considerable enthalpy of formation contribution from the conformational change of the sulfonamide backbone on adaption of the guest molecules. The host channels of the N,N′-ditosyl-p-phenylenediamine inclusion compounds are compared to those of the eth
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Yan, X., E. Bauer, P. Rogl, and S. Paschen. "Influence of Sn on the structural and thermoelectric properties of the type-I clathrates Ba8Cu5Si6Ge35-xSnx (0 ≤ x ≤ 0.6)." MRS Proceedings 1490 (2013): 19–26. http://dx.doi.org/10.1557/opl.2013.23.

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ABSTRACTOn the search for cost-competitive thermoelectric clathrates we have investigated the influence of Sn substitutions for Ge on the structural and thermoelectric properties of the type-I clathrate Ba8Cu5Si6Ge35. The solid solubility of Sn was found to be limited to 0.6 atoms per unit cell. A series of compounds with the nominal compositions Ba8Cu5Si6Ge35-xSnx (x = 0.2, 0.4, 0.6) was synthesized in a high-frequency furnace. The samples were annealed, and subsequently ball milled and hot pressed. The hot pressed samples were characterized by X-ray powder diffraction, energy-dispersive X-ra
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Iskineyeva, A. S., A. K. Mustafayeva, R. E. Bakirova, S. D. Fazylov та O. A. Nurkenov. "COMBINED IN SILICO AND EXPERIMENTAL INVESTIGATIONS OF VITAMIN D3 ENCAPSULATION BY STARCH β-OLIGOSACCHARIDE". HERALD OF SCIENCE OF S SEIFULLIN KAZAKH AGRO TECHNICAL RESEARCH UNIVERSITY, № 1(116) (13 березня 2023): 317–26. http://dx.doi.org/10.51452/kazatu.2023.1(116).1327.

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The relevance of the research lies in the need to develop methods for encapsulating fat-soluble vitamins with natural oligosaccharides to increase their water solubility and use in the production of functional foods. The production ofnanostructured encapsulated vitamins is a new innovative direction in the food industry. This article presents the results of theoretical and experimental studies on the production of a clathrate complex of fat-soluble vitamin D3 (ViD3, cholecalciferol) with β-cyclodextrin (β-CD). The interaction of fat-soluble ViD3 with β-oligosaccharide was carried out by microw
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Tesi sul tema "Clathrate compounds"

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Nohako, Kanyisa. "Immunosensors developed on clathrate platform compounds." Thesis, University of the Western Cape, 2013. http://hdl.handle.net/11394/4428.

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Philosophiae Doctor - PhD<br>Organic noncyclic compounds were used in the development of immunosensor for rapid fish species detection. Flourene derivatives show unique chemical and physical properties because they contain a rigid planar biphenyl unit, and the facile substitution at C9 position of the flourene can improve the solubility and processability of materials containing flourene without significantly increasing of steric interactions in the compounds backbone. 9-(4- methoxyphenyl)-9H-xanthen-9-ol is bulky, rigid and has an hydroxyl moiety that may act as a hydrogen – bond donor, as we
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Bentien, Anders [Verfasser]. "Transport and magnetic properties of rare-earth containing clathrates and clathrate-like compounds / Anders Bentien." Aachen : Shaker, 2005. http://d-nb.info/1181619599/34.

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Harvey, Grant Andrew. "Structure and reactivity of diol host-guest compounds." Master's thesis, University of Cape Town, 1990. http://hdl.handle.net/11427/17286.

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Includes bibliographical references.<br>The crystal structures of trans-9, 10-dihydroxy-9, 10-diphenyl-9, 10- dihydroanthracene with various guest molecules have been determined by X-ray diffraction. The guests were 2-butanone, 4-vinylpyridine, 4-methylpyridine and 2-methylpyridine. The host to guest ratios were determined by microanalysis and density measurements. The change of the overall host lattice structure upon guest release was studied by X-ray powder diffraction. The thermal characteristics of the compounds were studied using thermogravimetric analysis and differential scanning calori
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Lavelle, Laurence. "Selective criteria in Werner clathrates." Thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/23608.

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We have elucidated the structures of a series of Werner Clathrates with systematically changing guest molecules. The host is the inorganic coordination compound bis(isothiocyanato)tetra(4-vinylpyridine)nickel(II), [Ni(NCS)2(4-ViPy)4]. The guests are mixtures of tetrahydrofuran and the cyclic hydrocarbons: cyclohexane, cyclohexene, 1,3-cYclohexadiene, 1,4-cyclohexadiene and benzene. Host to guest ratios were elucidated by density and proton nuclear magnetic resonance spectroscopy. The thermal characteristics of the compounds were analysed by thermogravimetric analysis and differen.tial thermal
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Dahn, Douglas Charles. "Low temperature specific heat of LixNbS2 intercalation compounds." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25563.

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This thesis describes a study of the low temperature specific heat of LiⅹNbS₂, where x is between 0 and 1. Samples were prepared by intercalating lithium into niobium disulfide in electrochemical cells. Structural data obtained by x-ray diffraction are presented. These, together with electrochemical measurements, show that staged phases exist for some values of x. The electronic specific heat of LiⅹNbS₂, is consistent with complete charge transfer from the intercalated lithium to the bands of the NbS2 host. The lattice specific heat also shows large changes as a function of x. A discussion of
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Sayed, Amina. "Synergistic effects in clathrate selectivity." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/747.

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Thesis (MTech (Chemistry))-- Cape Peninsula University Technology, 2012<br>The inclusion behaviour of a series of hydroxyl hosts with a variety of liquid guests has been investigated. The host 9-(4-methoxyphenyl)-9H-xanthen-9-ol (A1), C20H16O3, forms inclusion compounds with aniline (ANI), 3-picoline (3PIC), morpholine (MORPH), Nmethylacetamide (NMA) and N-methylformamide (NMF). Their structures have been elucidated and correlated with their thermal behaviour. The inclusion compounds A1ANI and A1MORPH were successfully solved in space group P21/c, whereas A13PIC was solved in 𝑃ī. Non
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Peek, Mary Elizabeth. "Crystal structures of DNA*bis-intercalator complexes." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/27122.

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Jin, Pei-Wen. "Synthesis and Structure of Polynitro- and Polymenthylpolycyclic "Cage" Monomers and Polymers." Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc332109/.

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The objective of this study was to synthesize and characterize new energetic polycyclic "cage" compounds. As part of a program involved in the synthesis of new polynitropolycyclic compounds, 2,6-dinitro-5-methoxy- 7-carbomethoxypentacyclo[5. 3 .0 . 0* • * . CP • i ° . 0* •8]decane has been synthesized. This is a model system which can be used to study (1) the effect of nitro substitution on the photolability of carbon-carbon double bonds and (2) to develop methods for avoiding Haller-Bauer cleavage in cage /3-keto esters when synthesizing polynitro-substituted cage compounds.
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Taylor, Michael William. "Structures of Werner clathrates." Doctoral thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/22139.

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This work is predominantly devoted to the 4-phenylpyridine ligand and the role that it plays in the formation of a series of inorganic coordination complexes termed Werner Clathrates. The synthesis and characterization by single crystal X-ray diffraction techniques are reported for 18 structures, the majority of which, upon crystallization, have the ability to include solvent or guest molecules within the host framework. The compounds are divided into four broad classes with the host complex of each as follows: Class A [Ni(NCS)₂(4-PhPy)₄]; Class B [NiCl₂(4-PhPy)₄]; Class c [Ni(NCS)₂(4-MePy)₂(4
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Moore, Madeleine Henrietta. "Structure-activity relationships in Werner clathrates." Doctoral thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/17038.

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Includes bibliographical references.<br>The synthesis and characterization of a series of inorganic coordination compounds which, upon crystallization, have the ability to include solvent or guest molecules spatially within the lattice are reported. The compounds have the following general formula: [NiX2B4] - where X is isothiocyanate or bromine and B is 4-ethylpyridine, 4-vinylpiridine or 3,5-dimethylpyridine; [NiX2B2]n - where X is isothiocyanate, B is 2-aminopyridine and n indicates it is a polymer; [NiX2AB2]2 - where X is isothiocyanate, B is 3-aminopyridine (two of these four ligands in t
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Libri sul tema "Clathrate compounds"

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L, Atwood J., Davies J. E. D, and MacNicol D. D, eds. Inclusion compounds. Oxford: Oxford University Press, 1991.

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Sloan, E. Dendy. Clathrate hydrates of natural gases. 3rd ed. Boca Raton, FL: CRC Press/Taylor & Francis, 2007.

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Sloan, E. Dendy. Clathrate hydrates of natural gases. New York: M. Dekker, 1990.

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Sloan, E. Dendy. Clathrate hydrates of natural gases. 2nd ed. New York: Marcel Dekker, 1998.

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International Seminar on Inclusion Compounds (9th 2003 Novosibirsk, Russia). IXth International Seminar on Inclusion Compounds, (ISIC-9): Dedicated to the memory of Professor Yu.A. Dyadin: program, abstracts, list of participants. Edited by Di︠a︡din I︠U︡ A, Rodionova T. V, and Institut neorganicheskoĭ khimii (Rossiĭskai︠a︡ akademii︠a︡ nauk). Novosibirsk: In-t neorganicheskoĭ khimii, 2003.

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E, Weber, and Gerdil R, eds. Molecular inclusion and molecular recognition: Clathrates I. Berlin: Springer-Verlag, 1987.

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United States. National Aeronautics and Space Administration., ed. Graphite intercalation compounds prepared from graphite fluoride. [Washington, DC]: National Aeronautics and Space Administration, 1994.

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H, Moore Marla, and United States. National Aeronautics and Space Administration., eds. Far-infrared investigations of a methanol clathrate hydrate: Implications for astronomical observations. [Washington, DC: National Aeronautics and Space Administration, 1992.

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Donald, Kucera, and United States. National Aeronautics and Space Administration., eds. Graphite intercalation compound with iodine as the major intercalant. [Washington, DC: National Aeronautics and Space Administration, 1992.

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H, Moore Marla, and United States. National Aeronautics and Space Administration., eds. Far-infrared investigations of a methanol clathrate hydrate: Implications for astronomical observations. [Washington, DC: National Aeronautics and Space Administration, 1992.

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Capitoli di libri sul tema "Clathrate compounds"

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Dyadin, Yu A. "Constitution and Stability of Clathrate Hydrates." In Crystallography of Supramolecular Compounds, 223–41. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1692-0_13.

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Zubkus, Vladimir E., Evaldas E. Tornau, and Vladimir R. Belosludov. "Theoretic Physicochemical Problems of Clathrate Compounds." In Advances in Chemical Physics, 269–359. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470141380.ch4.

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Yamanaka, Shoji, Hitoshi Kawaji, and Mitsuo Ishikawa. "Preparation and Superconductivity of New Silicon Clathrate Compounds." In Advances in Superconductivity VIII, 419–24. Tokyo: Springer Japan, 1996. http://dx.doi.org/10.1007/978-4-431-66871-8_91.

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Yoshida, Noboru, Akitoshi Seiyama, and Masatoshi Fujimoto. "Thermodynamic Parameters for the Molecular Inclusion Reactions of Some AZO Compounds with α-Cyclodextrin." In Clathrate Compounds, Molecular Inclusion Phenomena, and Cyclodextrins, 573–81. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-009-5376-5_61.

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Harata, K., K. Uekama, M. Otagiri, and F. Hirayama. "Crystal Structures of Cyclodextrin Complexes with Chiral Molecules." In Clathrate Compounds, Molecular Inclusion Phenomena, and Cyclodextrins, 583–94. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-009-5376-5_62.

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Kim, Chang Oh, Jin Heung Kim, and Nak Kyu Chung. "A Study on Supercooling Characteristics of Clathrate Compounds with Concentration of TMA." In Materials Science Forum, 645–48. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-431-6.645.

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Yamanaka, Shoji. "High Pressure Synthesis of Superconducting Silicon Clathrates and Related Compounds." In The Physics and Chemistry of Inorganic Clathrates, 193–226. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-9127-4_7.

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Kim, Chang Oh, Jin Heung Kim, and Nak Kyu Chung. "A Study on the Cooling Characteristics of TMA Clathrate Compound with Additives." In Experimental Mechanics in Nano and Biotechnology, 1275–78. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-415-4.1275.

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Ripmeeste, J. A., and C. I. Ratcliffe. "Solid state Nmr studies of inclusion compounds." In Inclusion Compounds, 37–89. Oxford University PressOxford, 1991. http://dx.doi.org/10.1093/oso/9780198552932.003.0002.

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Abstract In the last review of solid state NMR as applied to clathrates,1 the emphasis was on clathrate hydrate work, with smaller contributions from studies on quinol and other clathrates. This time again clathrate hydrates are prominent, as these materials are perhaps the simplest and best understood of the clathrates. Since much work has been carried out on the channel inclusion compounds (urea, thiourea, cyclopho’ Sphazene, deoxycholic acid) these are also reviewed. For the sake of completeness, earlier work on these materials has also been summarized. Other host materials reviewed include cyclodextrins, tri-o-thymotide, and Dianin’s compound.
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Atwood, Jerry L. "Inclusion (Clathrate) Compounds." In Encyclopedia of Physical Science and Technology, 717–29. Elsevier, 2003. http://dx.doi.org/10.1016/b0-12-227410-5/00334-3.

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Atti di convegni sul tema "Clathrate compounds"

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Sakamoto, Hirokazu. "NMR studies of silicon clathrate compounds." In NANONETWORK MATERIALS: Fullerenes, Nanotubes, and Related Systems. AIP, 2001. http://dx.doi.org/10.1063/1.1420161.

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Ryan, J. C., D. V. Plant, C. L. Adler та N. M. Lawandy. "Optical properties of β-quinol clathrates in the far infrared". У OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.thdd3.

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Clathrate compounds are ideal systems for the study of quantum confined atoms and molecules. Experimental and theoretical studies of β-quinol clathrates with a variety of guest atoms and molecules have been performed. A harmonic potential with quartic perturbation has been used to model the β-quinol cage seen by the guest atom or molecule to explain comparable far-infrared transition probabilities from quantized states of the clathrate cage for noble gas atoms and simple homonuclear and heteronuclear diatomics.1 Predictions of overtone absorption cross section and third-order nonlinear suscept
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Kweon, G., G. Beadie, and N. M. Lawandy. "Pyroelectric detection of light beams using a phase transition in guest–host compounds." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.mhh7.

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Because of their relative ease of fabrication, β-quinol clath-rates are one of the most studied among non- stoichiometric inclusion compounds. (quinol)3(CH3OH) x with x close to 1 has shown1 spontaneous polarization at a critical temperature near 66 K accompanying induced voltage across the sample. During the phase transition, the enclathrated methanol undergoes a sudden cooperative re-orientation during which the angle between the methanol C–O bond and the crystallographic C-axis changes discontinuously. This produces a large pyroelectric coefficient for high occupancy methanol clathrates, wh
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Anno, H., H. Fukushima, K. Koga, K. Okita, and K. Matsubara. "Effect of Guest Substitution on Thermoelectric Properties of Clathrate Compounds." In 2006 25th International Conference on Thermoelectrics. IEEE, 2006. http://dx.doi.org/10.1109/ict.2006.331264.

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Bobev, Svilen, John Meyers, Veronika Fritsch, and Yuki Yamasaki. "Synthesis and structural characterization of novel clathrate-II compounds of silicon." In 2006 25th International Conference on Thermoelectrics. IEEE, 2006. http://dx.doi.org/10.1109/ict.2006.331267.

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Anno, H., K. Suzuki, K. Koga, and K. Matsubara. "Effect of Au substitution on thermoelectric properties of silicon clathrate compounds." In 2007 26th International Conference on Thermoelectrics (ICT 2007). IEEE, 2007. http://dx.doi.org/10.1109/ict.2007.4569465.

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Watanabe, T., T. Moriyasu, H. Okamura, K. Suekuni, T. Onimaru, T. Takabatake, and T. Kohmoto. "Spatial and temporal dynamics of thermal and carrier diffusions in clathrate compounds." In 2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR). IEEE, 2013. http://dx.doi.org/10.1109/cleopr.2013.6600587.

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Anno, H., M. Hokazono, H. Takakura, and K. Matsubara. "Thermoelectric properties of BasAu/sub x/Ge/sub 46-x/ clathrate compounds." In ICT 2005. 24th International Conference on Thermoelectrics, 2005. IEEE, 2005. http://dx.doi.org/10.1109/ict.2005.1519898.

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Jung-Hwan Kim, Norihiko L. Okamoto, Kyosuke Kishida, Katsushi Tanaka, and Haruyuki Inui. "Crystal structure and atomic vibration of Ba-Ge based type-III clathrate compounds." In 2007 26th International Conference on Thermoelectrics (ICT 2007). IEEE, 2007. http://dx.doi.org/10.1109/ict.2007.4569462.

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Watanabe, T., T. Moriyasu, H. Okamura, K. Suekuni, T. Onimaru, T. Takabatake, and T. Kohmoto. "Direct Observation of the Spatial and Temporal Dynamics of Thermal Diffusion in Clathrate Compounds." In CLEO: Applications and Technology. Washington, D.C.: OSA, 2012. http://dx.doi.org/10.1364/cleo_at.2012.jw2a.13.

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