Ghost Dog

The single crystal of the extra-large pore zeolite, ITQ-33, was obtained and used to explore its crystal structure details. The ITQ-33 structure was found to be disordered with the columnar periodic building unit, explaining the morphology changes upon the different Si/Ge ratio, and the formation of the hierarchical structure from assembling of ITQ-33 nanofibers

Constructing Concentration and Temperature Controllable Blue-Green Emission in a Single-Component Solid-State Phosphor

Controlling dopant ion concentration and temperature are two effectual methods to achieve color tuning and obtain white photoluminescent phosphors. Research of the emission manipulation by both concentration and temperature remains insufficient. In this work, we utilize the host defect emission and rare-earth ion emission in Y2CaGe4O12:Tb3+ under various temperatures to obtain a series of blue-green emissions widely distributed on the Commission Internationale de L’Eclairage (CIE) map. Concentration and thermal responses of the blue and the green emissions were analyzed and the host to dopant energy transfer shows significant at low doping concentration (<0.5%) and low temperature (<300 K). The overall luminescent behavior suggests the blue and the green emissions could be treated individually. A mathematical description (R2 = 0.982) was given to illustrate the successful controlling of emission by concentration and temperature and several cold white lights were observed at various conditions

Complex Open-Framework Germanate Built by 8‑Coordinated Ge₁₀ Clusters

A novel open-framework germanate |(C₅H₁₄­N₂)₂­(C₅H₁₂­N₂)_0.5(H₂O)_2.5|[Ge_12.5O₂₆(OH)₂] with three-dimensional 10- and 11-ring channels, denoted as SU-67, has been synthesized under hydrothermal conditions using 2-methylpiperazine (MPP) as the structure-directing agent (SDA). The synthesis is intimately related to that of JLG-5, a tubular germanate built from Ge₇ clusters. The influences of synthesis parameters are discussed. A strong influence of the hydrofluoric acid quantity on the resulting cluster building units can be concluded. The framework of SU-67 is based on an elaborate topological pattern of connected Ge₁₀ clusters forming intersecting 10- and 11-ring channels and has a low framework density (12.4 Ge atoms per 1000 ų). We have discovered that the topology of SU-67 is a new 8-connected <b>nce-8-</b><i><b>I</b></i><b>4</b>_<b>1</b><b>/</b><i><b>acd</b></i> net. Strong hydrogen bonding among the organic SDAs, water molecules, and Ge₁₀ clusters resulted in helical networks in SU-67

Complex Open-Framework Germanate Built by 8‑Coordinated Ge₁₀ Clusters

A novel open-framework germanate |(C₅H₁₄­N₂)₂­(C₅H₁₂­N₂)_0.5(H₂O)_2.5|[Ge_12.5O₂₆(OH)₂] with three-dimensional 10- and 11-ring channels, denoted as SU-67, has been synthesized under hydrothermal conditions using 2-methylpiperazine (MPP) as the structure-directing agent (SDA). The synthesis is intimately related to that of JLG-5, a tubular germanate built from Ge₇ clusters. The influences of synthesis parameters are discussed. A strong influence of the hydrofluoric acid quantity on the resulting cluster building units can be concluded. The framework of SU-67 is based on an elaborate topological pattern of connected Ge₁₀ clusters forming intersecting 10- and 11-ring channels and has a low framework density (12.4 Ge atoms per 1000 ų). We have discovered that the topology of SU-67 is a new 8-connected <b>nce-8-</b><i><b>I</b></i><b>4</b>_<b>1</b><b>/</b><i><b>acd</b></i> net. Strong hydrogen bonding among the organic SDAs, water molecules, and Ge₁₀ clusters resulted in helical networks in SU-67

Crystal Growth and Structure Determination of Oxygen-Deficient Sr₆Co₅O₁₅

Large single crystals of oxygen-deficient Sr6Co5O15-δ compounds, i.e., Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36, were obtained by using K2CO3 flux in the presence of additives of transition metal oxides. The single-crystal structure determination shows that the structures of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 crystallize in the space group R3̄ and can be described as one-dimensional face-sharing CoO3 polyhedral chains and Sr cation chains. Unlike the other known 2H-perovskite-related oxides in which the polyhedral chains consist of octahedra (Oh) and trigonal prism (TP), the structure of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 contain Oh and intermediate polyhedra (IP) and can be attributed to a general structure formula A6A‘2B3O15-δ, which is closely related to the known A6A‘B4O15 phases by shifting of a B atom and the O3 triangle along the c axis. Further study on O3 reveals that this oxygen position splits into two independent positions, corresponding to polyhedral geometry of IP and TP, respectively. Therefore, the polyhedral chain in the structure should be more precisely described as a random composite of the 4Oh + TP and 3Oh + 2IP. This model is used to interpret the magnetic properties, although not quantitatively. The 4-D structure analysis was also conducted for both Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 with a commensurate modulated structure in a 4-D superspace group, R3̄m(00γ)0s, γ = p/k = 3/5. By considering the same 4-D superspace group R3̄m(00γ)0s but different t-phases, one can understand the structure relationship between Sr6Co5O14.70 and Sr6Rh5O15

SU-62: Synthesis and Structure Investigation of a Germanate with a Novel Three-Dimensional Net and Interconnected 10- and 14-Ring Channels

A novel 3D open-framework germanate, |N2C4H14|4 [Ge20O41(OH)6]·3H2O (SU-62), was prepared from hydrothermal synthesis using 1,4-diaminobutane as the organic structure directing agent (SDA). The crystal structure was solved by single crystal X-ray diffraction. The framework is built from Ge10(O,OH)27 (Ge10) secondary building units and exhibits an irregular three-dimensional channel system encircled by 10- and 14-rings. The framework of SU-62 has an underlying topology that follows a novel five-coordinated svh-5-I41/amd net, while the pores follow the tsi net. The thermal behavior of SU-62 was studied by thermogravimetric (TG) analysis and in situ X-ray diffraction (XRPD). Crystallographic data: orthorhombic, space group Fdd2, unit cell parameters a = 15.297(3) Å, b = 53.58(1) Å, c = 14.422(3) Å, V = 11821(4) Å3, Z = 8

Crystal Growth and Structure Determination of Oxygen-Deficient Sr₆Co₅O₁₅

Large single crystals of oxygen-deficient Sr6Co5O15-δ compounds, i.e., Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36, were obtained by using K2CO3 flux in the presence of additives of transition metal oxides. The single-crystal structure determination shows that the structures of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 crystallize in the space group R3̄ and can be described as one-dimensional face-sharing CoO3 polyhedral chains and Sr cation chains. Unlike the other known 2H-perovskite-related oxides in which the polyhedral chains consist of octahedra (Oh) and trigonal prism (TP), the structure of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 contain Oh and intermediate polyhedra (IP) and can be attributed to a general structure formula A6A‘2B3O15-δ, which is closely related to the known A6A‘B4O15 phases by shifting of a B atom and the O3 triangle along the c axis. Further study on O3 reveals that this oxygen position splits into two independent positions, corresponding to polyhedral geometry of IP and TP, respectively. Therefore, the polyhedral chain in the structure should be more precisely described as a random composite of the 4Oh + TP and 3Oh + 2IP. This model is used to interpret the magnetic properties, although not quantitatively. The 4-D structure analysis was also conducted for both Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 with a commensurate modulated structure in a 4-D superspace group, R3̄m(00γ)0s, γ = p/k = 3/5. By considering the same 4-D superspace group R3̄m(00γ)0s but different t-phases, one can understand the structure relationship between Sr6Co5O14.70 and Sr6Rh5O15

Crystal Growth and Structure Determination of Oxygen-Deficient Sr₆Co₅O₁₅

Large single crystals of oxygen-deficient Sr6Co5O15-δ compounds, i.e., Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36, were obtained by using K2CO3 flux in the presence of additives of transition metal oxides. The single-crystal structure determination shows that the structures of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 crystallize in the space group R3̄ and can be described as one-dimensional face-sharing CoO3 polyhedral chains and Sr cation chains. Unlike the other known 2H-perovskite-related oxides in which the polyhedral chains consist of octahedra (Oh) and trigonal prism (TP), the structure of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 contain Oh and intermediate polyhedra (IP) and can be attributed to a general structure formula A6A‘2B3O15-δ, which is closely related to the known A6A‘B4O15 phases by shifting of a B atom and the O3 triangle along the c axis. Further study on O3 reveals that this oxygen position splits into two independent positions, corresponding to polyhedral geometry of IP and TP, respectively. Therefore, the polyhedral chain in the structure should be more precisely described as a random composite of the 4Oh + TP and 3Oh + 2IP. This model is used to interpret the magnetic properties, although not quantitatively. The 4-D structure analysis was also conducted for both Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 with a commensurate modulated structure in a 4-D superspace group, R3̄m(00γ)0s, γ = p/k = 3/5. By considering the same 4-D superspace group R3̄m(00γ)0s but different t-phases, one can understand the structure relationship between Sr6Co5O14.70 and Sr6Rh5O15

Crystal Growth and Structure Determination of Oxygen-Deficient Sr₆Co₅O₁₅

Large single crystals of oxygen-deficient Sr6Co5O15-δ compounds, i.e., Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36, were obtained by using K2CO3 flux in the presence of additives of transition metal oxides. The single-crystal structure determination shows that the structures of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 crystallize in the space group R3̄ and can be described as one-dimensional face-sharing CoO3 polyhedral chains and Sr cation chains. Unlike the other known 2H-perovskite-related oxides in which the polyhedral chains consist of octahedra (Oh) and trigonal prism (TP), the structure of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 contain Oh and intermediate polyhedra (IP) and can be attributed to a general structure formula A6A‘2B3O15-δ, which is closely related to the known A6A‘B4O15 phases by shifting of a B atom and the O3 triangle along the c axis. Further study on O3 reveals that this oxygen position splits into two independent positions, corresponding to polyhedral geometry of IP and TP, respectively. Therefore, the polyhedral chain in the structure should be more precisely described as a random composite of the 4Oh + TP and 3Oh + 2IP. This model is used to interpret the magnetic properties, although not quantitatively. The 4-D structure analysis was also conducted for both Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 with a commensurate modulated structure in a 4-D superspace group, R3̄m(00γ)0s, γ = p/k = 3/5. By considering the same 4-D superspace group R3̄m(00γ)0s but different t-phases, one can understand the structure relationship between Sr6Co5O14.70 and Sr6Rh5O15

Crystal Growth and Structure Determination of Oxygen-Deficient Sr₆Co₅O₁₅

Large single crystals of oxygen-deficient Sr6Co5O15-δ compounds, i.e., Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36, were obtained by using K2CO3 flux in the presence of additives of transition metal oxides. The single-crystal structure determination shows that the structures of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 crystallize in the space group R3̄ and can be described as one-dimensional face-sharing CoO3 polyhedral chains and Sr cation chains. Unlike the other known 2H-perovskite-related oxides in which the polyhedral chains consist of octahedra (Oh) and trigonal prism (TP), the structure of Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 contain Oh and intermediate polyhedra (IP) and can be attributed to a general structure formula A6A‘2B3O15-δ, which is closely related to the known A6A‘B4O15 phases by shifting of a B atom and the O3 triangle along the c axis. Further study on O3 reveals that this oxygen position splits into two independent positions, corresponding to polyhedral geometry of IP and TP, respectively. Therefore, the polyhedral chain in the structure should be more precisely described as a random composite of the 4Oh + TP and 3Oh + 2IP. This model is used to interpret the magnetic properties, although not quantitatively. The 4-D structure analysis was also conducted for both Sr6Co5O14.70 and Sr6Co4.9Ni0.1O14.36 with a commensurate modulated structure in a 4-D superspace group, R3̄m(00γ)0s, γ = p/k = 3/5. By considering the same 4-D superspace group R3̄m(00γ)0s but different t-phases, one can understand the structure relationship between Sr6Co5O14.70 and Sr6Rh5O15