{Sn[Zn₄Sn₄S₁₇]}⁶⁻: A Robust Open Framework Based on Metal‐Linked Penta‐Supertetrahedral [Zn₄Sn₄S₁₇]¹⁰⁻ Clusters with Ion‐Exchange Properties

Abstract

Like zeolites, K6Sn[Zn4Sn4S17] (see structure) has remarkable ion‐exchange properties and forms CsK5Sn[Zn4Sn4S17] and RbK5Sn[Zn4Sn4S17] in the presence of the Cs+ and Rb+ ions, respectively. These compounds have an open framework comprising [Zn4Sn4S17]10− clusters linked by Sn4+ centers and are remarkably stable. One‐fifth of the K+ ions play an important templating role in stabilizing the framework. Zn blue, Sn red, S yellow, K orange.

Heavy‐Metal‐Ion Capture, Ion‐Exchange, and Exceptional Acid Stability of the Open‐Framework Chalcogenide (NH4)4In12Se20

“…Similar selectivity against these alkali cations was also observed for K 6 Sn[Zn 4 Sn 4 S 17 ] and it appears to be a characteristic property of small pore frameworks. [6] This is a useful feature that Table 2. Calculated formulae based on EDS and % H, N analyses for the products of the ion-exchange reactions between 1 and various cations as well as band-gap energies for these materials.…”

“…In general, three-dimensional open-framework chalcogenides are very flexible because 1) are built by corner-sharing or metal-linked clusters and thus, have cavities with relatively thin walls [2,3,6] and 2) the metal-chalcogen-metal angles (100-1158) are relatively small [compared to Al-O-Si angles ( % 160-1808) in zeolites], thus allowing expansion of the framework. For example, K 6 Sn[Zn 4 Sn 4 S 17 ], a three-dimensional chalcogenide framework with three different kinds of pores, displays ion-exchange properties that are not consistent with its pore window size and thus, these properties were explained on the basis of a possible "breathing action" of the framework.…”

“…For example, K 6 Sn[Zn 4 Sn 4 S 17 ], a three-dimensional chalcogenide framework with three different kinds of pores, displays ion-exchange properties that are not consistent with its pore window size and thus, these properties were explained on the basis of a possible "breathing action" of the framework. [6,17] Heavy-metal-ion-exchange and remediation properties of (NH 4 ) 4 In 12 Se 20 : Compound 1 showed ion-exchange capacity for heavy-metal ions (like Ag + , Hg 2 + , and Pb 2 + ). Ion-exchange reactions employing exactly one equivalent of Ag or 0.5 equivalenst of Hg or Pb yielded almost pure exchanged products.…”

Syntheses, structures and magnetic properties of two new heterometallic complexes constructed from a tripodal ligand N-(carbamoylmethyl)iminodiacetato(2−) (ADA)

“…Compounds 1 and 2 are isostructural and crystallize in the triclinic system, space group P ı. ADA ligand acts as chelating and bridging functions featuring a novel hexadentate binding mode. Magnetic measurements show that there is weak ferromagnetic interactions between the adjacent Ni(II) ions in 1.Crystal engineering of coordination polymers is a very active research field, the potentiality of these compounds as functional materials as well as their flexibility in aspects such as composition and topology being very appealing [1][2][3][4][5]. It is well known that organic ligands play crucial roles in the design and construction of desirable frameworks.…”

“…Crystal engineering of coordination polymers is a very active research field, the potentiality of these compounds as functional materials as well as their flexibility in aspects such as composition and topology being very appealing [1][2][3][4][5]. It is well known that organic ligands play crucial roles in the design and construction of desirable frameworks.…”