"Ion-imprinting" strategy towards metal sulfide scavenger enables the highly selective capture of radiocesium.

Highly selective capture of radiocesium is an urgent need for environmental radioactive contamination remediation and spent fuel disposal. Herein, a strategy is proposed for construction of "inorganic ion-imprinted adsorbents" with ion recognition-separation capabilities, and a metal sulfide CsGaSnS·HO (FJSM-CGTS) with "imprinting effect" on Cs is prepared. We show that the K activation product of FJSM-CGTS, CsKGaSnS·HO (FJMS-KCGTS), can reach adsorption equilibrium for Cs within 5 min, with a maximum adsorption capacity of 246.

(CHN)(NH)HInSnS: a layered metal sulfide based on supertetrahedral T2 clusters with photoelectric response and ion exchange properties.

A new layered metal sulfide, namely (CHN)(NH)HInSnS (1, CHN = -(2-aminoethyl) piperazine), has been solvothermally synthesized and characterized. Compound 1 crystallizes in the monoclinic space group 2/. Its structure features a two-dimensional layer of {InSnS} with the (4,4) topology net, which is formed by interlinking supertetrahedral T2 clusters as secondary building units.

New group IIIA metal phosphate-oxalates containing dimethylammonium cations with proton conductivity.

Three new group IIIA metal phosphate-oxalate (MPO) compounds, namely [(CH)NH][M(HPO)(HPO)(CO)] (M = Al (1), Ga (2)) and [(CH)NH][In(HPO)(HPO)(CO)]·HO (3), have been synthesized. Their crystal structures feature an anionic layer with the topology net. In particular, 1 displays a proton conductivity () of 9.

Efficient Co-Adsorption and Highly Selective Separation of Cs and Sr with a K -Activated Niobium Germanate by the pH Control.

Cs and Sr are hazardous to ecological environment and human health due to their strong radioactivity, long half-life, and high mobility. However, effective adsorption and separation of Cs and Sr from acidic radioactive wastewater is challenging due to stability issues of material and the strong competition of protons. Herein, a K -activated niobium germanate (K-NGH-1) presents efficient Cs /Sr coadsorption and highly selective Cs /Sr separation, respectively, under different acidity conditions.

High-capacity recovery of Cs ions by facilely synthesized layered vanadyl oxalatophosphates with the clear insight into remediation mechanism.

Radiocesium remediation is of great significance for the sustainable development of nuclear energy and ecological protection. It is very challenging for the effective recovery of Cs from aqueous solutions due to its strong radioactivity, solubility and mobility. Herein, the efficient recovery of Cs ions has been achieved by three layered vanadyl oxalatophosphates, namely (NH)[(VO)(HPO)CO]·5 HO (NVPC), Na[(VO)(HPO)CO]·2 HO (SVPC), and K[(VO)(HPO)(PO)(CO)]·4.

Highly Efficient Uptake of Cs by Robust Layered Metal-Organic Frameworks with a Distinctive Ion Exchange Mechanism.

Cs with strong radioactivity and a long half-life is highly hazardous to human health and the environment. The efficient removal of Cs from complex solutions is still challenging because of its high solubility and easy mobility and the influence of interfering ions. It is highly desirable to develop effective scavengers for radiocesium remediation.

Comparing the reliability of relative bird abundance indices from standardized surveys and community science data at finer resolutions.

Biodiversity loss is a global ecological crisis that is both a driver of and response to environmental change. Understanding the connections between species declines and other components of human-natural systems extends across the physical, life, and social sciences. From an analysis perspective, this requires integration of data from different scientific domains, which often have heterogeneous scales and resolutions.

Critical Risk Indicators (CRIs) for the electric power grid: a survey and discussion of interconnected effects.

The electric power grid is a critical societal resource connecting multiple infrastructural domains such as agriculture, transportation, and manufacturing. The electrical grid as an infrastructure is shaped by human activity and public policy in terms of demand and supply requirements. Further, the grid is subject to changes and stresses due to diverse factors including solar weather, climate, hydrology, and ecology.

Layered Thiostannates with Distinct Arrangements of Mixed Cations for the Selective Capture of Cs, Sr, and Eu Ions.

The selective capture of radioactive cesium, strontium, and lanthanides from liquid nuclear waste is of great significance to environmental remediation and human health. Herein, the rapid and selective removal of Cs, Sr, and Eu ions is achieved by two metal sulfides (FJSM-SnS-2 and FJSM-SnS-3). Both structures feature [SnS] layers with the mixed cations of [CHNH] and [Bmmim] (1-butyl-2,3-dimethylimidazolium) as templates.

Robust and Flexible Thioantimonate Materials for Cs Remediation with Distinctive Structural Transformation: A Clear Insight into the Ion-Exchange Mechanism.

It is imperative yet challenging to efficiently sequester the Cs ion from aqueous solutions because of its highly environmental mobility and extremely high radiotoxicity. The systematical clarification for underlying mechanism of Cs removal and elution at the molecular level is rare. Here, efficient Cs capture is achieved by a thioantimonate [MeNH]SbS (FJSM-SbS) with high capacity, fast kinetics, wide pH durability, excellent β and γ radiation resistances, and facile elution.

The Uptake of Hazardous Metal Ions into a High-Nuclearity Cluster-Based Compound with Structural Transformation and Proton Conduction.

The discovery of novel high-nuclearity oxo-clusters considerably promotes the development of cluster science. We report a high-nuclearity oxo-cluster-based compound with acid/alkali-resistance and radiation stabilities, namely, (HO)[CdSbO(l-tta)(l-Htta)(HO)]·29HO (FJSM-CA; l-Htta = l-tartaric acid), which features a two-dimensionally anionic layer based on the largest Sb-oxo-clusters with 28-metal-ion-core [CdSbO]. It is challenging to efficiently capture Sr, Ba (analogue of Ra), and [UO] ions from aqueous solutions due to their high water solubility and environmental mobility, while it is unprecedented that a novel Sb-oxo-cluster-based framework material FJSM-CA can efficiently remove these hazardous ions accompanied with intriguing structural transformations.

Unexpected Roles of Alkali-Metal Cations in the Assembly of Low-Valent Uranium Sulfate Molecular Complexes.

The directing effect of coordinating ligands in the formation of uranium molecular complexes has been well established, but the role of counterions in metal-ligand interactions remains ambiguous and requires further investigation. In this work, we describe the targeted isolation, through the choice of alkali-metal ions, of a family of tetravalent uranium sulfates, showing the influence of the overall topology and, unexpectedly, the U nuclearity upon the inclusion of such countercations. Analyses of the structures of uranium(IV) oxo/hydroxosulfate oligomeric species isolated from consistent synthetic conditions reveal that the incorporation of Na and Rb promotes the crystallization of 0D discrete clusters with a hexanuclear [UO(OH)(HO)] core, whereas the larger Cs ion allows for the isolation of a 2D-layered oligomer with a less condensed trinuclear [U(O)] center.

Fast and Selective Removal of Aqueous Uranium by a K-Activated Robust Zeolitic Sulfide with Wide pH Resistance.

For the nuclear industry, uranium is not only an important strategic resource but also a serious global contaminant with radiotoxicity and high chemotoxicity. It is very important to efficiently capture uranium from complex aqueous solutions for further treatment and disposal of nuclear wastes. Herein, we first demonstrate the suitability of a three-dimensional (3D) water-stable K-exchanged zeolitic sulfide, namely K@GaSnS-1, for the remediation of radioactive and toxic uranium by ion exchange.

Fast and Effective Decontamination of Aqueous Mercury by a Highly Stable Zeolitic-like Chalcogenide.

Highly efficient and effective removal of mercury from water, especially at very low ionic concentration, remains a grand challenge for ecosystem protection and human health. Herein, we present the synthesis, crystal structure, and mercury uptake performance of a new heterometallic chalcogenidometalate, namely, [TAEAH][TAEAH]GaSnS·HO (GaSnS-1; TAEA = Tris(2-aminoethyl)amine). GaSnS-1 features a three-dimensional (3D) zeolite-typed (RWY) framework structure of [GaSnS] that is constructed by corner-sharing of supertetrahedral [GaSnS] T2 clusters.

Efficient Removal of [UO], Cs, and Sr Ions by Radiation-Resistant Gallium Thioantimonates.

Unconventional ion exchangers can achieve efficient removal of [UO], Cs, and Sr ions from complex aqueous solutions and are of great interest for environmental remediation. We report two new gallium thioantimonates, [MeNH][GaSbS]·HO (FJSM-GAS-1) and [EtNH][GaSbS]·HO (FJSM-GAS-2), which present excellent ion exchange properties for [UO], Cs, and Sr ions. They exhibit high ion exchange capacities for [UO], Cs, and Sr ions ( q = 196 mg/g, q = 164 mg/g, and q = 80 mg/g for FJSM-GAS-1, q = 144 mg/g for FJSM-GAS-2) and short equilibrium times for [UO] ion exchange (5 min for FJSM-GAS-1 and 15 min for FJSM-GAS-2, respectively).

[CH NH ] Ga SbS S O H: A Three-Dimensionally Open-Framework Heterometallic Chalcogenidoantimonate Exhibiting Ni Ion-Exchange Property.

An open-framework chalcogenidoantimonate, namely, [CH NH ] Ga SbS S O H (1), has been solvothermally synthesized and structurally characterized. Interestingly, 1 showed Ni ion-exchange properties and wide pH resistance, with a maximum exchange capacity of 76.9 mg g .

Layered ASnS·1.25HO (A = Organic Cation) as Efficient Ion-Exchanger for Rare Earth Element Recovery.

Exploring new ion-exchangers for the recovery of rare earth elements (REEs) and recycling is worthwhile for the high-tech industry and an eco-friendly sustainable economy. The efficient enrichment of low concentration REE from complex aqueous solutions containing large excess of competitive ions is challenging. Here we present a chalcogenide example as a superior REE ion-exchanger efficiently removing them from very complex aqueous solutions, (MeNH)(MeNH) SnS·1.

[CHNH]AgSnSnS: An Open-Framework Mixed-Valent Chalcogenidostannate.

An open-framework chalcogenidostannate, namely, [CHNH]AgSnSnS (1), has been solvothermally synthesized and structurally characterized, which represents the first organically templated three-dimensional (3D) Ag-Sn-S compound containing the mixed valence of Sn(IV)/Sn(II) and displays visible-light-driven photocatalytic activity for degradation of crystal violet (CV).

Efficient Removal and Recovery of Uranium by a Layered Organic-Inorganic Hybrid Thiostannate.

Uranium is important in the nuclear fuel cycle both as an energy source and as radioactive waste. It is of vital importance to recover uranium from nuclear waste solutions for further treatment and disposal. Herein we present the first chalcogenide example, (Me2NH2)1.

Synthesis, Structure, Band Gap, and Near-Infrared Photosensitivity of a New Chalcogenide Crystal, (NH4)4Ag12Sn7Se22.

A new chalcogenide crystal, (NH4)4Ag12Sn7Se22 (FJSM-STS), has been solvothermally synthesized. The crystal structure, which is composed of arrays of [Sn3Se9]n(6n-) chains interconnecting [SnAg6Se10]n(10n-) and [Ag3Se4]n(5n-) layers, is unprecedented among the reported A/Ag/Sn/Q (A = cation; Q = S, Se, and Te) compounds. Optical absorption together with theoretical calculations of the band structure indicate a direct band gap of 1.

[Effects of storage time on quality of Desmodium styracifolium seeds].

The dynamic changes of germination percentage, germination potential, thousand-seed weight, antioxidase activity in Desmodium styracifolium seeds with different storage time were tested, and electrical conductivity, contents of soluble sugar, soluble protein, starch in seed leach liquor were also determined in order to reveal the mechanism of seed deterioration. The results as the following. (1) The germination percentage, germination potential and thousand-seed weight of D.

Combination of Metal Coordination Tetrahedra and Asymmetric Coordination Geometries of Sb(III) in the Organically Directed Chalcogenidometalates: Structural Diversity and Ion-exchange Properties.

Chalcogenidometalates exhibit rich and diverse structures and properties applicable to ion exchange, thermoelectrics, photocatalysis, nonlinear optics, and so on. This personal account summarizes our recent progress in constructing chalcogenidometalates by combining metal coordination tetrahedra and the asymmetric coordination geometries of Sb(3+) in the presence of organic species (typically organic amines and metal-organic amine complexes), which has been demonstrated as an effective strategy for synthesizing chalcogenidometalates with diversified structures and interesting properties. The linkage modes of asymmetric SbQn (n = 3, 4) geometries and group 13 (or 14) metal coordination tetrahedra are analyzed, and the secondary building units (SBUs), with different compositions and architectures, are clarified.