From 1D chain to 3D network: Syntheses, structures, and properties of K2MnSn2Se6, K2MnSnSe4, and K2Ag2SnSe4

Xuean Chen, Xiaoying Huang, Aihua Fu, Jing Li, Li Dan Zhang, Hong You Guo

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Abstract

K2MnSn2Se6 (I), K2MnSnSe4 (II), and K2Ag2SnSe4 (III) were prepared by molten-salt (alkali-metal polyselenide flux) reactions at intermediate temperature (400-520 °C). Their crystal structures were determined by single-crystal X-ray diffraction techniques. Crystal data for I: space group P4/ncc, a = 8.167(1), c = 19.724(4) Å, Z = 4, R1/wR2 = 0.0435/0.0722 for 592 observed reflections and 29 variables; crystal data for II: space group P4n2, a = 10.574(1), c = 8.301(2) Å, Z = 2, R1/wR2 = 0.0339/0.0939 for 1208 observed reflections and 40 parameters; crystal data for III: space group P2/c, a = 7.575(2), b = 5.920(1), c = 12.148(2) Å, β = 113.56(3)°, Z = 2, R1/wR2 = 0.0595/0.1135 for 1098 observed reflections and 45 parameters. The crystal structure of I consists of infinite 1[MnSn2Se6]2- anionic chains containing [Sn2Se6 4-] units linked by tetrahedrally coordinated Mn2+ ions, with the K+ cations situated between the chains. II contains a three-dimensional framework formed by corner- and edge-sharing SnSe4 and MnSe4 tetrahedra, with large channels hosting the K+ cations. III is a layered compound containing 2∞[Ag2SnSe4]2- anionic layers separated by K+ counterions. The anionic layer is formed by parallel SiS2-type 1∞[AgSe2]3- chains cross-linked by tetrahedral SnSe4 via bridging selenium atoms of the chains. The results from differential scanning calorimetry (DSC) measurements show that I is stable up to 590 °C, II decomposes at about 243 °C, and III melts congruently at about 510 °C. I, II, and III are semiconductors with estimated band gaps of 2.0, 1.7, and 1.8 eV, respectively.

Original languageEnglish
Pages (from-to)2385-2391
Number of pages7
JournalChemistry of Materials
Volume12
Issue number8
DOIs
Publication statusPublished - 2000

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Crystals
Cations
Crystal structure
Positive ions
Alkali Metals
Selenium
Alkali metals
Molten materials
Differential scanning calorimetry
Energy gap
Salts
Single crystals
Ions
Semiconductor materials
Fluxes
X ray diffraction
Atoms
Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Materials Chemistry

Cite this

From 1D chain to 3D network : Syntheses, structures, and properties of K2MnSn2Se6, K2MnSnSe4, and K2Ag2SnSe4. / Chen, Xuean; Huang, Xiaoying; Fu, Aihua; Li, Jing; Zhang, Li Dan; Guo, Hong You.

In: Chemistry of Materials, Vol. 12, No. 8, 2000, p. 2385-2391.

Research output: Contribution to journalArticle

Chen, Xuean ; Huang, Xiaoying ; Fu, Aihua ; Li, Jing ; Zhang, Li Dan ; Guo, Hong You. / From 1D chain to 3D network : Syntheses, structures, and properties of K2MnSn2Se6, K2MnSnSe4, and K2Ag2SnSe4. In: Chemistry of Materials. 2000 ; Vol. 12, No. 8. pp. 2385-2391.
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abstract = "K2MnSn2Se6 (I), K2MnSnSe4 (II), and K2Ag2SnSe4 (III) were prepared by molten-salt (alkali-metal polyselenide flux) reactions at intermediate temperature (400-520 °C). Their crystal structures were determined by single-crystal X-ray diffraction techniques. Crystal data for I: space group P4/ncc, a = 8.167(1), c = 19.724(4) {\AA}, Z = 4, R1/wR2 = 0.0435/0.0722 for 592 observed reflections and 29 variables; crystal data for II: space group P4n2, a = 10.574(1), c = 8.301(2) {\AA}, Z = 2, R1/wR2 = 0.0339/0.0939 for 1208 observed reflections and 40 parameters; crystal data for III: space group P2/c, a = 7.575(2), b = 5.920(1), c = 12.148(2) {\AA}, β = 113.56(3)°, Z = 2, R1/wR2 = 0.0595/0.1135 for 1098 observed reflections and 45 parameters. The crystal structure of I consists of infinite 1[MnSn2Se6]2- anionic chains containing [Sn2Se6 4-] units linked by tetrahedrally coordinated Mn2+ ions, with the K+ cations situated between the chains. II contains a three-dimensional framework formed by corner- and edge-sharing SnSe4 and MnSe4 tetrahedra, with large channels hosting the K+ cations. III is a layered compound containing 2∞[Ag2SnSe4]2- anionic layers separated by K+ counterions. The anionic layer is formed by parallel SiS2-type 1∞[AgSe2]3- chains cross-linked by tetrahedral SnSe4 via bridging selenium atoms of the chains. The results from differential scanning calorimetry (DSC) measurements show that I is stable up to 590 °C, II decomposes at about 243 °C, and III melts congruently at about 510 °C. I, II, and III are semiconductors with estimated band gaps of 2.0, 1.7, and 1.8 eV, respectively.",
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T2 - Syntheses, structures, and properties of K2MnSn2Se6, K2MnSnSe4, and K2Ag2SnSe4

AU - Chen, Xuean

AU - Huang, Xiaoying

AU - Fu, Aihua

AU - Li, Jing

AU - Zhang, Li Dan

AU - Guo, Hong You

PY - 2000

Y1 - 2000

N2 - K2MnSn2Se6 (I), K2MnSnSe4 (II), and K2Ag2SnSe4 (III) were prepared by molten-salt (alkali-metal polyselenide flux) reactions at intermediate temperature (400-520 °C). Their crystal structures were determined by single-crystal X-ray diffraction techniques. Crystal data for I: space group P4/ncc, a = 8.167(1), c = 19.724(4) Å, Z = 4, R1/wR2 = 0.0435/0.0722 for 592 observed reflections and 29 variables; crystal data for II: space group P4n2, a = 10.574(1), c = 8.301(2) Å, Z = 2, R1/wR2 = 0.0339/0.0939 for 1208 observed reflections and 40 parameters; crystal data for III: space group P2/c, a = 7.575(2), b = 5.920(1), c = 12.148(2) Å, β = 113.56(3)°, Z = 2, R1/wR2 = 0.0595/0.1135 for 1098 observed reflections and 45 parameters. The crystal structure of I consists of infinite 1[MnSn2Se6]2- anionic chains containing [Sn2Se6 4-] units linked by tetrahedrally coordinated Mn2+ ions, with the K+ cations situated between the chains. II contains a three-dimensional framework formed by corner- and edge-sharing SnSe4 and MnSe4 tetrahedra, with large channels hosting the K+ cations. III is a layered compound containing 2∞[Ag2SnSe4]2- anionic layers separated by K+ counterions. The anionic layer is formed by parallel SiS2-type 1∞[AgSe2]3- chains cross-linked by tetrahedral SnSe4 via bridging selenium atoms of the chains. The results from differential scanning calorimetry (DSC) measurements show that I is stable up to 590 °C, II decomposes at about 243 °C, and III melts congruently at about 510 °C. I, II, and III are semiconductors with estimated band gaps of 2.0, 1.7, and 1.8 eV, respectively.

AB - K2MnSn2Se6 (I), K2MnSnSe4 (II), and K2Ag2SnSe4 (III) were prepared by molten-salt (alkali-metal polyselenide flux) reactions at intermediate temperature (400-520 °C). Their crystal structures were determined by single-crystal X-ray diffraction techniques. Crystal data for I: space group P4/ncc, a = 8.167(1), c = 19.724(4) Å, Z = 4, R1/wR2 = 0.0435/0.0722 for 592 observed reflections and 29 variables; crystal data for II: space group P4n2, a = 10.574(1), c = 8.301(2) Å, Z = 2, R1/wR2 = 0.0339/0.0939 for 1208 observed reflections and 40 parameters; crystal data for III: space group P2/c, a = 7.575(2), b = 5.920(1), c = 12.148(2) Å, β = 113.56(3)°, Z = 2, R1/wR2 = 0.0595/0.1135 for 1098 observed reflections and 45 parameters. The crystal structure of I consists of infinite 1[MnSn2Se6]2- anionic chains containing [Sn2Se6 4-] units linked by tetrahedrally coordinated Mn2+ ions, with the K+ cations situated between the chains. II contains a three-dimensional framework formed by corner- and edge-sharing SnSe4 and MnSe4 tetrahedra, with large channels hosting the K+ cations. III is a layered compound containing 2∞[Ag2SnSe4]2- anionic layers separated by K+ counterions. The anionic layer is formed by parallel SiS2-type 1∞[AgSe2]3- chains cross-linked by tetrahedral SnSe4 via bridging selenium atoms of the chains. The results from differential scanning calorimetry (DSC) measurements show that I is stable up to 590 °C, II decomposes at about 243 °C, and III melts congruently at about 510 °C. I, II, and III are semiconductors with estimated band gaps of 2.0, 1.7, and 1.8 eV, respectively.

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