The removal of highly radioactive and long-lived 137 Cs + and 90 Sr 2+ from solution is of significance for radionuclide remediation. Herein we prepared a two-dimensionally microporous thiostannate, namely (Me 2 NH 2 ) 4/3 (Me 3 NH) 2/3 Sn 3 S 7 $1.25H 2 O (FJSM-SnS), and systematically investigated its Cs + and Sr 2+ ionexchange performance in different conditions. The structural stabilities and variation, ion-exchange kinetic and isothermal behavior, pH-dependent distribution coefficients (K d ), ion-exchange in simulated groundwater and ion-exchange applied to chromatography have been investigated. The results indicated that the maximum Cs + and Sr 2+ ion-exchange capacities of FJSM-SnS were 408.91 mg g À1 and 65.19 mg g À1 , respectively. In particular, FJSM-SnS showed quick ion-exchange ability and wide pH resistance (0.7-12.7) which make it outstanding among the ion-exchangers. An ion-exchange chromatographic column was firstly studied for chalcogenido ion-exchange materials, that is, a column filled with 3.0 g FJSM-SnS could remove 96-99% of Cs + ion and near 100% of Sr 2+ ion at low ionic concentrations in 900 bed volumes solutions. Furthermore, the title material could be synthesized on a large scale by a facile, one-pot and economical solvothermal method. The relatively low cost but remarkable ion-exchange performance makes it promising for radionuclide remediation. † Electronic supplementary information (ESI) available: Crystallographic data for FJSM-SnS and FJSM-SnS-Cs in CIF format, TG-MS spectra, mass spectra of solution and solvent, PXRD, EDS, the kinetics studies at room temperature, IR and table of data in the simulated groundwater, competitive ion-exchange experiments and the ion-exchange chromatographic column experiment. CCDC 1025383 and 1025384. For ESI and crystallographic data in CIF or other electronic format see

By utilizing different small amine molecules as structure-affecting agents (SAAs) and charge-balancing agents (CBAs), four new M–Sn–Q (M = Zn, Ag; Q = S, Se) compounds with the anionic architectures ranging from a one-dimensional (1D) chain to a three-dimensional (3D) network have been solvothermally synthesized. Compound [(Me)2NH2]2­ZnSn3Se8 (1) features an anionic (4,4) layer of [ZnSn3Se8] n 2n– and represents a rare [ZnSn3Se10] T2 cluster-based two-dimensional Zn–Sn–Se compound directed by organic amine. Compound [NH4]3AgSn3Se8 (2) contains infinite linear anionic chains of [AgSn3Se8] n 3n–. Compound [CH3NH3]2­[H3O]­Ag5Sn4Se12­·C2H5OH (3) exhibits a 3D open-framework structure of [Ag5Sn4Se12] n 3n– with intersecting 3D channels. Compound [CH3NH3]6­Ag12Sn6S21 (4) features a 3D framework structure with 1D channels filled by [CH3NH3]+ cations. The most fascinating structural feature of compound 4 is that a complex 3D [Ag12S17] n 22n– anionic network exists based on the combination of three types of basic building blocks of [AgS2] dumbbells, [AgS3] triangles, and [AgS4] tetrahedra. The thermal stabilities, optical properties of the title compounds 1–4, as well as the theoretical band structure and density of states of compound 4 have been studied. Moreover, compound 3 displayed visible-light-driven photocatalytic activity for the degradation of crystal violet.

The photoinduced properties of the octacoordinated complex K4MoIV(CN)8⋅2 H2O were studied by theoretical calculations, crystallography, and optical and magnetic measurements. The crystal structure recorded at 10 K after blue light irradiation reveals an heptacoordinated Mo(CN)7 species originating from the light‐induced cleavage of one Mo−CN bond, concomitant with the photoinduced formation of a paramagnetic signal. When this complex is heated to 70 K, it returns to its original diamagnetic ground state, demonstrating full reversibility. The photomagnetic properties show a partial conversion into a triplet state possessing significant magnetic anisotropy, which is in agreement with theoretical studies. Inspired by these results, we isolated the new compound [K(crypt‐222)]3[MoIV(CN)7]⋅3 CH3CN using a photochemical pathway, confirming that photodissociation leads to a stable heptacyanomolybdate(IV) species in solution.

Two hybrid organic−inorganic metal halides with room-temperature phosphorescence (RTP) have been designed and synthesized. The aromatic organic ligands in the hybrid structures give rise to the phosphorescent property, while the rigid inorganic frameworks in the hybrid structures enhance the RTP efficiency. Pb 2 (PLA)(H 2 O) 2 Br 2 (PLA, 1,4-phenylenediacetic acid) shows the anti-Kasha's rule RTP, which has been rarely reported before. The twisted intramolecular charge transfer (TICT) in a flexible PLA ligand might be the origination of the anti-Kasha's rule RTP according to the photoluminescence study under the variables of temperature, excitation wavelength, and ligands. A method that combined the calculations from Platon and CrystalExplorer has been built to analyze the packing mode and interaction of the ligands. The compact face-to-face packing of aromatic ligands leads to the highest RTP efficiency in Pb 4 (TPA) 3 Br 2 . Due to the strong covalent bonding, Pb 4 (TPA) 3 Br 2 exhibits superior thermal stability and water resistance, which can serve as an efficient LED underwater.

Among numerous heterometallic chalcogenidoantimonates, relatively a few amine-directed Ge-Sb-S compounds have been synthesized. Presented here are the solvothermal syntheses, crystal structures, and ion-exchange, optical, and photocatalytic properties of two novel amine-directed Ge-Sb-S compounds, namely, [CH3NH3]20Ge10Sb28S72·7H2O (1) and [(CH3CH2CH2)2NH2]3Ge3Sb5S15·0.5(C2H5OH) (2). The structure of 1 features an unprecedented two-dimensional Ge-Sb-S double-layer composed of two twofold rotational symmetry-related thick [Ge8Sb28S72]n(28n-) single layers adhered via vertex-sharing [GeS4] tetrahedra. Compound 2 features a unique [Ge3Sb5S15]n(3n-) slab perforated with large elliptic-like windows. Remarkably, compound 1 exhibited excellent Cs(+) ion-exchange property despite the presence of excess competitive cations, such as Na(+), K(+), Mg(2+), and Ca(2+) ions. In addition, compound 1 displayed visible-light-driven photocatalytic activity for degradation of rhodamine B.

Presented is an inorganic-organic hybrid compound Mn2(api)Sb2S5 (1) with uniaxial NTE behaviour. The NTE of reflects a strong synergistic role of organic and inorganic components, which results from the novel zigzag linkage of interlamellar organic ligands. An "elevator-platform" expansion mechanism was proposed, with implications for future design of sensitive hybrid thermomechanical actuators.

Thin films of the optimally electron-doped TЈ-phase superconductor La 1.89 Ce 0.11 CuO 4±␦ are investigated by dilute Co doping, forming La 1.89 Ce 0.11 ͑Cu 1−x Co x ͒O 4±␦ ͑LCCCO͒ with x = 0.01-0.05. The following results are obtained: for the whole dilute Co doping range, LCCCO thin films show long-range ferromagnetic ordering in the temperature range from 5 to 300 K, which is likely due to the Ruderman-Kittel-Kasuya-Yosida interaction; for very dilute Co doping, x = 0.01 and 0.02, the superconductivity is maintained, and the system shows the coexistence of superconductivity and ferromagnetism in the CuO 2 plane. This may be based on the nature of the charge carriers in electron-doped high-T c cuprate superconductors.

An efficient method for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles has been developed through palladium(0) catalyzed dehydrogenative cyclization ofN-arylidenearoylhydrazides without oxidants and hydrogen acceptors.