Comparison of the crystal and electronic structures of three 2:1 salts of the organic donor molecule BEDT-TTF with pentafluorothiomethylsulfonate anions SF{sub 5}CH{sub 2}SO{sub 3}{sup {minus}}, SF{sub 5}CHFSO{sub 3}{sup {minus}}, and SF{sub 5}CF{sub 2}SO{sub 3}{sup {minus}}

Salts of the donor molecule, bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET), with pentafluorothiomethylsulfonate (SF{sub 5}CX{sub 2}SO{sub 3}{sup {minus}}, X = H or F) anions have been prepared. Three phases, {beta}{double_prime}-(ET){sub 2}SF{sub 5}CH{sub 2}SO{sub 3}{beta}{prime}-(ET){sub 2...

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Veröffentlicht in:Chemistry of materials 2000-02, Vol.12 (2)
Hauptverfasser: Ward, B.H., Schlueter, J.A., Geiser, U.
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description Salts of the donor molecule, bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET), with pentafluorothiomethylsulfonate (SF{sub 5}CX{sub 2}SO{sub 3}{sup {minus}}, X = H or F) anions have been prepared. Three phases, {beta}{double_prime}-(ET){sub 2}SF{sub 5}CH{sub 2}SO{sub 3}{beta}{prime}-(ET){sub 2}SF{sub 5}CF{sub 2}SO{sub 3} and {beta}{double_prime}-(ET){sub 2}SF{sub 5}CHFSO{sub 3} (A,B, and C respectively) were obtained by electrocrystallization with the corresponding LiSF{sub 5}CX{sub 2}SO{sub 3} electrolytes. The structures of these salts were determined by single-crystal X-ray diffraction, and their physical properties were examined by electrical resistivity measurements as well as by ESR and Raman spectroscopy. The A,C and B salts are considerably different in their crystal structures, physical properties, and electronic structures despite the similarity in the structures of SF{sub 5}CX{sub 2}SO{sub 3}{sup {minus}}(X = H,F) anions. The A salt has two kinds of ET donor molecules with considerably different charge densities. The electronic structure of C has both one-dimensional (1D) and two-dimensional (2D) Fermi surfaces which are similar to those found in the organic superconductor A. The ESR data for the B salt indicate that it opens a spin gap below 45 K. The differences in the physical properties of the three salts were analyzed by calculating the HOMO-HOMO interaction energies between nearest-neighbor ET molecules in their donor molecule layers.
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Three phases, {beta}{double_prime}-(ET){sub 2}SF{sub 5}CH{sub 2}SO{sub 3}{beta}{prime}-(ET){sub 2}SF{sub 5}CF{sub 2}SO{sub 3} and {beta}{double_prime}-(ET){sub 2}SF{sub 5}CHFSO{sub 3} (A,B, and C respectively) were obtained by electrocrystallization with the corresponding LiSF{sub 5}CX{sub 2}SO{sub 3} electrolytes. The structures of these salts were determined by single-crystal X-ray diffraction, and their physical properties were examined by electrical resistivity measurements as well as by ESR and Raman spectroscopy. The A,C and B salts are considerably different in their crystal structures, physical properties, and electronic structures despite the similarity in the structures of SF{sub 5}CX{sub 2}SO{sub 3}{sup {minus}}(X = H,F) anions. The A salt has two kinds of ET donor molecules with considerably different charge densities. The electronic structure of C has both one-dimensional (1D) and two-dimensional (2D) Fermi surfaces which are similar to those found in the organic superconductor A. The ESR data for the B salt indicate that it opens a spin gap below 45 K. The differences in the physical properties of the three salts were analyzed by calculating the HOMO-HOMO interaction energies between nearest-neighbor ET molecules in their donor molecule layers.</description><identifier>ISSN: 0897-4756</identifier><identifier>EISSN: 1520-5002</identifier><identifier>DOI: 10.1021/cm990238q</identifier><language>eng</language><publisher>United States</publisher><subject>BEDT-TTF ; CRYSTAL STRUCTURE ; ELECTRONIC STRUCTURE ; MATERIALS SCIENCE ; PHYSICAL PROPERTIES ; SULFONATES</subject><ispartof>Chemistry of materials, 2000-02, Vol.12 (2)</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/20050894$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Ward, B.H.</creatorcontrib><creatorcontrib>Schlueter, J.A.</creatorcontrib><creatorcontrib>Geiser, U.</creatorcontrib><creatorcontrib>Argonne National Lab., IL (US)</creatorcontrib><title>Comparison of the crystal and electronic structures of three 2:1 salts of the organic donor molecule BEDT-TTF with pentafluorothiomethylsulfonate anions SF{sub 5}CH{sub 2}SO{sub 3}{sup {minus}}, SF{sub 5}CHFSO{sub 3}{sup {minus}}, and SF{sub 5}CF{sub 2}SO{sub 3}{sup {minus}}</title><title>Chemistry of materials</title><description>Salts of the donor molecule, bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET), with pentafluorothiomethylsulfonate (SF{sub 5}CX{sub 2}SO{sub 3}{sup {minus}}, X = H or F) anions have been prepared. Three phases, {beta}{double_prime}-(ET){sub 2}SF{sub 5}CH{sub 2}SO{sub 3}{beta}{prime}-(ET){sub 2}SF{sub 5}CF{sub 2}SO{sub 3} and {beta}{double_prime}-(ET){sub 2}SF{sub 5}CHFSO{sub 3} (A,B, and C respectively) were obtained by electrocrystallization with the corresponding LiSF{sub 5}CX{sub 2}SO{sub 3} electrolytes. The structures of these salts were determined by single-crystal X-ray diffraction, and their physical properties were examined by electrical resistivity measurements as well as by ESR and Raman spectroscopy. The A,C and B salts are considerably different in their crystal structures, physical properties, and electronic structures despite the similarity in the structures of SF{sub 5}CX{sub 2}SO{sub 3}{sup {minus}}(X = H,F) anions. The A salt has two kinds of ET donor molecules with considerably different charge densities. The electronic structure of C has both one-dimensional (1D) and two-dimensional (2D) Fermi surfaces which are similar to those found in the organic superconductor A. The ESR data for the B salt indicate that it opens a spin gap below 45 K. 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Three phases, {beta}{double_prime}-(ET){sub 2}SF{sub 5}CH{sub 2}SO{sub 3}{beta}{prime}-(ET){sub 2}SF{sub 5}CF{sub 2}SO{sub 3} and {beta}{double_prime}-(ET){sub 2}SF{sub 5}CHFSO{sub 3} (A,B, and C respectively) were obtained by electrocrystallization with the corresponding LiSF{sub 5}CX{sub 2}SO{sub 3} electrolytes. The structures of these salts were determined by single-crystal X-ray diffraction, and their physical properties were examined by electrical resistivity measurements as well as by ESR and Raman spectroscopy. The A,C and B salts are considerably different in their crystal structures, physical properties, and electronic structures despite the similarity in the structures of SF{sub 5}CX{sub 2}SO{sub 3}{sup {minus}}(X = H,F) anions. The A salt has two kinds of ET donor molecules with considerably different charge densities. The electronic structure of C has both one-dimensional (1D) and two-dimensional (2D) Fermi surfaces which are similar to those found in the organic superconductor A. The ESR data for the B salt indicate that it opens a spin gap below 45 K. The differences in the physical properties of the three salts were analyzed by calculating the HOMO-HOMO interaction energies between nearest-neighbor ET molecules in their donor molecule layers.</abstract><cop>United States</cop><doi>10.1021/cm990238q</doi></addata></record>
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subjects BEDT-TTF
CRYSTAL STRUCTURE
ELECTRONIC STRUCTURE
MATERIALS SCIENCE
PHYSICAL PROPERTIES
SULFONATES
title Comparison of the crystal and electronic structures of three 2:1 salts of the organic donor molecule BEDT-TTF with pentafluorothiomethylsulfonate anions SF{sub 5}CH{sub 2}SO{sub 3}{sup {minus}}, SF{sub 5}CHFSO{sub 3}{sup {minus}}, and SF{sub 5}CF{sub 2}SO{sub 3}{sup {minus}}
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