Two types of lanthanide selenidostannates(IV) first prepared under the same solvothermal conditions

Adamantane-type clusters: compounds with a ubiquitous architecture but a wide variety of compositions and unexpected materials properties

The research into adamantane-type compounds has gained momentum in recent years, yielding remarkable new applications for this class of materials. In particular, organic adamantane derivatives (AdR4) or inorganic adamantane-type compounds of the general formula [(RT)4E6] (R: organic substituent; T: group 14 atom C, Si, Ge, Sn; E: chalcogenide atom S, Se, Te, or CH2) were shown to exhibit strong nonlinear optical (NLO) properties, either second-harmonic generation (SHG) or an unprecedented type of highly-directed white-light generation (WLG) - depending on their respective crystalline or amorphous nature. The (missing) crystallinity, as well as the maximum wavelengths of the optical transitions, are controlled by the clusters' elemental composition and by the nature of the organic groups R. Very recently, it has been additionally shown that cluster cores with increased inhomogeneity, like the one in compounds [RSi{CH2Sn(E)R'}3], not only affect the chemical properties, such as increased robustness and reversible melting behaviour, but that such 'cluster glasses' form a conceptually new basis for their use in light conversion devices. These findings are likely only the tip of the iceberg, as beside elemental combinations including group 14 and group 16 elements, many more adamantane-type clusters (on the one hand) and related architectures representing extensions of adamantane-type clusters (on the other hand) are known, but have not yet been addressed in terms of their opto-electronic properties. In this review, we therefore present a survey of all known classes of adanmantane-type compounds and their respective synthetic access as well as their optical properties, if reported.

Facile solvothermal preparation of an organic hybrid dysprosium selenidoantimonate for an efficient oxygen evolution reaction

To overcome the issue of the sluggish kinetics in the oxygen evolution reaction (OER), the development of an efficient OER electrocatalyst with high intrinsic activity is very desirable for green hydrogen energy utilization from electrochemical water splitting. Herein, a facile and feasible solvothermal reaction of Sb, Se, DyCl3 and triethylenetetramine (teta) at 170 °C for 7 days achieved a new organic hybrid dysprosium selenidoantimonate [Dy(teta)2][SbSe4] (SbSe-1), which comprises discrete [SbSe4]3- and [Dy(teta)2]3+ ions. SbSe-1 was utilized in combination with acetylene black (AB), Ni nanoparticles and the porous Ni foam (NF) support to fabricate a Ni/SbSe-1@AB/NF electrode as an efficient anodic electrocatalyst, showing excellent OER electrocatalytic performance with a low overpotential of 269 mV at 10 mA cm-2. Although some antimony chalcogenides are used as electrocatalysts for the water splitting, organic hybrid lanthanide chalcogenidoantimonates applied as OER electrocatalysts have not emerged. Therefore, SbSe-1 offers the first example of an organic hybrid lanthanide chalcogenido-antimonate as an OER electrocatalyst.

One-Dimensional Selenidostannates Based on an Infrequent Tetrameric Cluster [Sn4Se12] Exhibiting Electro-Catalytic Properties

The discovery of low-cost and efficient electro-catalytic materials for hydrogen evolution reaction (HER) is very desirable in hydrogen energy technology. Here, a new type of one-dimensional (1-D) organic hybrid selenidostannate [Ni(en)₃]_n[Sn₂Se₅]_n (SnSe-1, en = ethylenediamine) with an in situ [Ni(en)₃]²⁺ complex was achieved by the solvothermal reaction of Sn, Se, and NiCl₂·6H₂O in a mixed solvent of en and triethanolamine at 160 °C for 10 days. The crystal structure of SnSe-1 contains a unique 1-D [Sn₂Se₅^2-]_n chain built up from the sharing-edge connection of a hitherto-unknown tetrameric [Sn₄Se₁₂] cluster, which is separated by discrete [Ni(en)₃]²⁺ complexes. SnSe-1 is first combined with Ni nanoparticles supported on conductive porous Ni foam (NF) to constitute a Ni/SnSe-1/NF electrode as the HER electro-catalyst, displaying superior electro-catalytic activity in near-neutral conditions.

An Organic Hybrid Indium-Telluride Incorporating Binuclear Complexes [In2(ea)4]2+ with a Bridging Oxygen Donor

The new organic hybrid indium-telluride [In₂(ea)₂Te₂]_n (1; Hea = ethanolamine) exhibits a new type of one-dimensional polymeric chain based on the linkages of dinuclear [In₂(ea)₄]²⁺ and [In₂Te₄]^2- units, which offers the first example of an indium-telluride framework incorporating binuclear complexes [In₂(ea)₄]²⁺ with a bridging O donor. 1 shows a distinctive photocurrent response and photocatalytic properties under visible-light illumination.

Structural Diversity of F-Element Monophthalocyanine Complexes

The preparation and structural characterization of a series of lanthanide and uranium(IV) phthalocyanine halide complexes were achieved by reaction of the corresponding metal halide with Li₂ Pc. A preliminary survey of their reactivity includes ring reduction of Li(THF)₄ [PcUCl₃ ] with KC₈ leading to the first structurally characterized Pc^4- actinide complex, hydrolysis of PcDyCl(DMSO) to PcDyOH(H₂ O)₃ and preparation of a unique trimeric triangular Li(PcDy)₃ (OH)₄ (H₂ O) cluster.

A Series of Lanthanide Selenidogermanates: The First Coexistence of Three Types of Selenidogermanate Units in the Same Architecture

A series of lanthanide selenidogermanates, (H₂peha)[Ln₂(μ-OH)₂(tepa)₂Cl₂]{[Ln₂(μ-OH)₂(tepa)₂Cl]₂(μ-Ge₂Se₆)}[Ge₂Se₆]Cl₂ [Ln = Y (1a) and Er (1b); peha = pentaethylenexamine, tepa = tetraethylenepentamine], [Sm₂(μ-OH)₂(tepa)₂(μ-Ge₂Se₆)]_n (2), [Ho₂(μ-OH)₂(tepa)₂(μ-Ge₂Se₆)]_n (3), and [Ce₄(tepa)₄(μ-GeSe₄)(μ-GeSe₅)(μ-Ge₂Se₆)]_n (4), were made under solvothermal conditions. Compounds 1a and 1b contain a protonated H₂peha²⁺ ion, the complex cation [Ln₂(μ-OH)₂(tepa)₂Cl₂]²⁺, a [Ge₂Se₆]^4- anion, free Cl^- ions, and a {[Ln₂(μ-OH)₂(tepa)₂Cl]₂(μ-Ge₂Se₆)}²⁺ cation constructed by two unsaturated [Ln₂(μ-OH)₂(tepa)₂Cl]³⁺ groups connecting via the trans terminal Se atoms of the [Ge₂Se₆]^4- anion, which provides the first example of an organic decorated lanthanide selenidogermanate cation. Both compounds 2 and 3 contain one-dimensional chains [Ln₂(μ-OH)₂(tepa)₂(μ-Ge₂Se₆)]_n constructed by a combination of unsaturated complex cations [Ln₂(μ-OH)₂(tepa)₂]⁴⁺ and [Ge₂Se₆]^4- anions, but their stacking patterns of neutral chains are different. Compound 4 contains one-dimensional chain [Ce₄(tepa)₄(μ-GeSe₄)(μ-GeSe₅)(μ-Ge₂Se₆)]_n, where three different selenidogermanate units acting as bridging ligands connect unsaturated [Ce(tepa)]³⁺ ions. Compound 4 represents the first example of the coexistence of three different selenidogermanate anions in the same architecture. Their optical properties are studied, and the magnetic properties of compounds 1b and 2-4 are also investigated.

A series of new hybrid selenidostannates with metal complexes prepared in alkylol amines

A series of new hybrid selenidostannates were synthesized in alkylol amines, whose zinc selenidostannate with a photocurrent response represents the first example of the hybrid chalcogenidostannate incorporating rare tetrahedral metal complexes.

A novel 2-D Mn selenidostannate(iv) incorporating high-nuclear Mn clusters with spin canting behavior

A solvothermal reaction of SnCl₄·5H₂O, Mn and Se in ethanolamine (Hea) yielded a novel 2-D Mn selenidostannate(iv) [Mn₇(ea)₆(SnSe₄)₂]_n (1), which not only provides the first example of the incorporation of a hepta-nuclear Mn cluster [Mn₇(ea)₆]⁸⁺ into a selenidostannate(iv) framework, but also shows unusual spin canting behavior.

Lanthanide(III) complexes with μ-SnSe4 and μ-Sn2Se6 linkers: solvothermal syntheses and properties of new Ln(III) selenidostannates decorated with linear polyamine

New lanthanide-selenidostannate complexes [{La(peha)(Cl)}{La(peha)(NO3)}(μ-1κ2:2κ2-SnSe4)] (1), [H2trien][{La(trien)2}2(μ-1κ:2κ-Sn2Se6)][Sn2Se6]·H2O (2) and [{Ln(tepa)(μ-OH)}2(μ-1κ:2κ-Sn2Se6)] n ·nH2O (Ln=Sm(3), Eu(4)) were prepared by solvothermal methods in pentaethylenehexamine (peha), triethylenetetramine (trien) and tetraethylenepentamine (tepa), respectively. Acting as a tetradentate chelating and bridging ligand, μ-1κ2:2κ2-SnSe4, the tetrahedral SnSe4 unit joins {La(peha)(Cl)}2+ and {La(peha)(NO3)}2+ complex fragments to generate the neutral coordination compound 1. The tetradentate μ-1κ2:2κ2 bridge in 1 represents a new coordination mode for the SnSe4 tetrahedron. In 2, dinuclear [Sn2Se6]4− anions are formed of SnSe4 tetrahedra via edge-sharing. One [Sn2Se6]4− anion acts as a bidentate bridging ligand in a μ-1κ:2κ coordination mode to join two {La(trien)2}3+ units, and the other [Sn2Se6]4− anion exists as a free charge compensating ion. In 3 and 4, the [Sn2Se6]4− anion connects binuclear [{Ln(tepa)(μ-OH)}2]2+ (Ln=Sm, Eu) units with a bidentate μ-1κ:2κ mode, giving neutral coordination polymers [{Ln(tepa)(μ-OH)}2(μ-1κ:2κ-Sn2Se6)] n . The La(2)3+ ion in 1 is in a 10-fold coordination environment of LaN6O2Se2, whereas the La(1)3+ ions in 1 and 2 are in 9-fold coordinated environments forming polyhedra LaN6ClSe2 and LaN8Se, respectively. The Sm3+ and Eu3+ ions in 3 and 4 are both in an 8-fold coordination environment of LnN5O2Se. Compounds 1−4 exhibit optical band gaps between 2.21 and 2.42 eV. Their thermal stabilities were investigated by thermogravimetric analyses.

A series of lanthanide glutarates: lanthanide contraction effect on crystal frameworks of lanthanide glutarates

Although some 3-D lanthanide glutarates have been reported, they exhibit a very robust structural type, whose structure is not changed by different Ln³⁺ ions, but compound 3 shows a new structural type.

Structural transformation of selenidostannates from 1D to 0D and 2D via a stepwise amine-templated assembly strategy

An interesting structural transformation of multidimensional selenidostannates induced through a stepwise amine-templated assembly strategy.

The first examples of 1-D organic hybrid lanthanoid thioarsenates based on two [As(V)S4](3-) linkage modes

A series of new 1-D organic hybrid lanthanoid thioarsenates [Ln(dap)2]2(μ-η(1):η(1):η(1):η(1)-AsS4)(μ-η(1):η(1)-As(V)S4)]n {Ln = Ce (Ia), Pr (Ib), Nd (Ic), and Sm (Id); dap = diaminopropane} have been prepared under solvothermal conditions and structurally characterized. Compounds Ia-d contain two [As(V)S4](3-) linkage modes, namely μ-η(1):η(1):η(1):η(1)-As(V)S4 and μ-η(1):η(1)-As(V)S4, which are linked alternately with [Ln(dap)2](3+) groups into 1-D neutral chains [Ln(dap)2]2(μ-η(1):η(1):η(1):η(1)-As(V)S4)(μ-η(1):η(1)-As(V)S4)]n, which represent the first examples of 1-D organic hybrid lanthanoid thioarsenates based on two [As(V)S4](3-) linkage modes. To learn more about the influence of lanthanide contraction on the formation of lanthanoid thioarsenates, five organic hybrid lanthanoid thioarsenates [Ln(dap)3As(V)S4] [Ln = Tb (IIa), Dy (IIb), Ho (IIIc), and Er (IIId)] and [Er(dien)2As(V)S4] (III, dien = diethylenetriamine) are also provided. Both II and III contain neutral lanthanide-centred complexes, where the tetrahedral anion [As(V)S4](3-) acts as a chelating ligand to the complex [Ln(dap)3](3+)/[Er(dien)2](3+) cation. Their optical properties have been characterized by UV-vis spectra, and the density functional theory calculation of Ia has been performed.

A series of lanthanoid selenidoantimonates(v): rare examples of lanthanoid selenidoantimonates based on dinuclear lanthanide complexes

This work provides rare examples of lanthanoid selenidoantimonates based on dinuclear lanthanide complexes.