A new porous titanium(IV) squarate metal-organic framework (MOF), denoted as IEF-11, having a never reported titanium secondary building unit, is successfully synthesized and fully characterized. IEF-11 not only exhibits permanent porosity but also an outstanding chemical stability. Further, consequence of combining the photoactive Ti(IV) electroactive squarate, presents relevant optoelectronic properties, applied here to photocatalytic overall water splitting reaction. Remarkably,...

Two novel three-dimensional metal–organic frameworks (MOFs) based on the photoactive pyrene tetraphosphonate ligand and copper (denoted as IEF-8 IEF-9) have been hydrothermally synthesized fully characterized (XRD, FTIR, TGA, SEM, XPS, etc.). Their crystal structures were unveiled by single-crystal X-ray diffraction. Remarkably, these materials exhibit coordinatively unsaturated (II) sites, free −PO3H2 −PO3H acidic groups, good thermal chemical stability. Further, their optoelectronic...

The multicomponent mixed-metal Cu(II)/Mo(VI) oxides/1,3-bis(1,2,4-triazol-4-yl)adamantane (tr2ad) system was thoroughly studied employing a compositional diagram approach. concept allowed us to prepare three layered copper-molybdate hybrid solids [Cu(II)2(tr2ad)4](Mo8O26) (1), [Cu4(II)(μ4-O)(tr2ad)2(MoO4)3]·7.5H2O (2), and [Cu(I)2(tr2ad)2](Mo2O7)·H2O (3), elucidate the relationship between initial reagent concentration/stoichiometry stability of resultant structural motifs. Compounds 1 2...

Unusual reversible dehydration-hydration process of a stable bismuth-based hybrid perovskite with good optoelectronic properties and exceptional stability.

Inorganic semiconductors are extensively considered to be among the most promising materials convert solar light into electricity or chemical energy owing their efficiency in separation of photoinduced electron/hole. Bismuth oxides, and, particular, those built up [Bi2O2]2+ layers, show an efficient charge thus, high photocatalytic activities. To explore a possible synergetic effect bismuth metallic nodes combined with electron-rich linker squarate, Bi2O2(C4O4) IEF-3 (an IMDEA Energy...

The structure of π-Ti₂O(PO₄)₂·2H₂O was determined by the SR-PXRD method. proton conductivity chitosan/π-TiP membranes reached 4.5 × 10⁻³ S cm⁻¹ at 95%-RH.

The novel 2D bismuth–camphorate IEF‐1, formulated as [Bi(L)(HL)] (where H 2 L = camphoric acid), has been successfully isolated large single crystals and easily scaled up by hydrothermal synthesis. crystalline structure of IEF‐1 was unveiled single‐crystal X‐ray diffraction, in the monoclinic space group P 1 , fully characterized using several standard solid‐state techniques. material is thermally stable to ca. 240 °C without any visible structural change. In addition, study nonlinear...

The crystal structure of the K6.4Nb28.2Ta8.1O94 pseudo-tetragonal tungsten bronze-type oxide was determined using a combination X-ray powder diffraction, neutron diffraction and transmission electron microscopy techniques, including high angle annular dark field scanning (HAADF-STEM), bright STEM (ABF-STEM) energy-dispersive compositional mapping (STEM-EDX). compound crystallizes in space group Pbam with unit cell parameters = 37.468(9) Å, b 12.493(3) c 3.95333(15) Å. consists corner sharing...

A one-pot reaction of a copper source (metallic powder Cu0 or Cu2+ salts) and bpy (bpy = 2,2'-bipyridine) in the presence (NH4)2HPO4 (NH4)6Mo7O24·4H2O yields heterometallic hybrid compounds general type {[Cu(bpy)n(H2O)m]p[P2MoxOy]}. The structures exhibit number phosphomolybdate POMs including not only common Strandberg anion [P2Mo5O23]6- but also its unprecedented bi- trilacunary derivatives [P2Mo3O18]8- [P2Mo2O15]8-. structural determinants metal (copper vs salts), counterion salts,...

Tungstate bronze (TB) related borate–phosphate K5Ta8BP4O34 is afforded from boron-enriched potassium–molybdate flux. It was found to crystallize [space group P2/c (no. 13), a = 1384.36(5), b 640.99(2), c 2054.75(8) pm, β 125.007(2)°, V 1493.44(9) × 106 pm3] isotypically with the K5MIV2Nb6P5O34 (M Ti, Zr) of compounds. Revealed by X-ray structural analysis, occupational disorder boron and phosphorus atoms over two crystallographically distinct positions explained decrease tetrahedral...

The structure of photocatalytic and photoluminescent binary vanadate the general formula “CaZnV₂O₇” has been investigated using X-ray powder diffraction.

Aliovalent K0.92In0.46Nb0.54OPO4 (KINP, potassium indium niobium oxide phosphate) features a chain structure involving corner-sharing [MO6] octa­hedra (M = In/Nb), which allows this compound to be recognized as member of the KTiOPO4 (KTP) family. However, its crystallization in polar space group P41 belonging 4/m Laue generates own subclass KTP-related compounds. The unit cell contains 18 symmetry-independent atoms occupying general positions. cis–cis principle octa­hedral arrangement is...

The successful application of molybdate flux for the crystal growth complex tantalum oxide, verbi causa kalitantite, was shown at a submillimetre scale. structure determined via X-ray single refinements (space group Rc, = 627.32(2) pm, c 3685.75(13) V 1256.11(7) pm3 × 10−6, Z 6) to be an α-U3O8-type layered compound presenting general formula Mx(Nb,Ta)3n+1O8n+3 (where n 1 in case M being Na, Ca or Ag and 2 when is La–Eu, Y Bi), thus corroborating earlier studies. Experimental evaluations...

Abstract Potassium‐containing zirconium(IV)/titanium(IV) tantalum(V) oxides, K 3 TiTa 7 O 21 ( 1 ) and ZrTa 2 ), of Nb 8 ‐type compounds are afforded from potassium‐molybdate flux. Both crystallize in the hexagonal space group P 6 / mcm (no. 193) with a = 908.69(2), c 1202.83(7) pm 1.324 Z 2) for 913.30(3), 1219.21(6) 1.335 , respectively. The Structural motif [ M Ta ] 3– Ti 4+ or Zr consists edge‐shared ,Ta) 24 ‐units that similar to corner‐sharing 27 units synthetic soro ‐silicate Si 13...

Besides the well-known pyrotechnic applications of insensitive high energy compounds such as s-tetrazine, they are promising materials for relevant (e.g., electrochemical storage, photocatalysis). Bis-3,5-diamino-1,2,4-triazolyl-1,2,4,5-tetrazine (BDTT) is a nitrogen-rich conjugated heterocyclic compound (nitrogen ≈ 71 wt %), inert to ignition and mechanical stimuli thermally stable up 370 °C. The solvent-free crystalline structure this density (named IEF-12 IMDEA framework) reported here...

The asymmetric unit of the title compound, dipotassium bis[hexaaquanickel(II)] tris(μ(2)-methylenediphosphonato)tripalladium(II) hexahydrate, K(2)[Ni(H(2)O)(6)](2)[Pd(3){CH(2)(PO(3))(2)}(3)]·6H(2)O, consists half a {[Pd{CH(2)(PO(3))(2)}](3)}(6-) anion [one Pd atom (4e) and methylene C occupy positions on twofold axis] in rare 'handbell-like' arrangement, with K(+) [Ni(H(2)O)(6)](2+) cations to form neutral complex, completed by three solvent water molecules. units exhibit close Pd···Pd...

The complex phosphate tricaesium calcium iron bis(diphosphate), Cs(3)CaFe(P(2)O(7))(2), has been prepared by the flux method. Isolated [FeO(5)] and [CaO(6)] polyhedra are linked two types of P(2)O(7) groups into a three-dimensional framework. latter is penetrated hexagonal channels along axis where three Cs atoms located. Calculations caesium Voronoi-Dirichlet give coordination schemes for as [8 + 3], [9 1] 4]. structure includes features both two- frameworks double pyrophosphates.

The crystal lattice of piezoelectric semiconductor Sr₂Nb₂V₂O₁₁adopts<italic>Cc</italic>ordering due to<italic>Γ</italic>₂⁻mode distortion.

A new complex phosphate K 1.84 Fe 1.42 Nb 0.58 (PO 4 ) 3 has been synthesized by the self-flux technique. The X-ray single crystal structure and magnetic properties were studied. compound crystallizes in cubic system with space group P2 1 (a = 9.9404(10) Å belongs to langbeinite type. contains [M 2 P O 18 ] building units. “Closed” fragments 8 9 60 provide for location of two potassium atoms. Antiferromagnetic interactions detected at low temperatures which originate from superexchange...