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Endohedral clusters count as molecular models for intermetallic compounds - a class of compounds in which bonding principles are scarcely understood. Here we report on soluble cluster anions with the highest charges on a single cluster known so far. The clusters reflect the close analogy between intermetalloid clusters and corresponding coordination polyhedra in intermetallic compounds. While many endohedral Zintl ions have previously been obtained via solution based reactions, we now established Raman spectroscopy as a reliable probe to assign for the first time the presence of discrete, endohedrally filled clusters in intermetallic phases. The ternary precursor alloys with nominal compositions "K5Co1.2Ge9" and "K4Ru3Sn7" exhibit characteristic bonding modes originating from metal atoms in the center of polyhedral clusters, thus revealing that filled clusters are present in these alloys. We report also on the structural characterization of [Co@Ge9]5- (1a) and [Ru@Sn9]6- (2a) obtained from solutions of the respective alloys. Quantum-chemical calculations are in agreement with the formulation of (Co1-)@[Ge9]4- and (Ru2-)@[Sn9]4-, and thus, the latter anion is a very rare example comprising a Ru(-II) species.
This article was published in the following journal.
Name: Angewandte Chemie (International ed. in English)
The quest for stable gas-phase anions in highly negative charge states has been a great challenge. While multiply charged anions are stabilized in solids and liquids by compensating cations and solvat...
Metal-organic frameworks (MOFs) based on edge-transitive 6-c acs nets are well-developed and can be synthesized from trinuclear metal clusters and ditopic ligands, i.e., MOF-235 and MIL-88. The ration...
To understand the effect of magnesium atom doping on boron clusters, here we report the lowest-lying energy structures and electronic properties of neutral and monoanionic magnesium-boron clusters, in...
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The structural diversity of highly connected metal-organic frameworks (MOFs) has long been limited due to the scarcity of highly connected metal clusters and the corresponding available topology. Here...
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A clinical Evaluation to determine metal ion release from 4th generation metal-on-metal hip articulating surfaces in cementless total hip arthroplasty.
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Neutral or negatively charged ligands bonded to metal cations or neutral atoms. The number of ligand atoms to which the metal center is directly bonded is the metal cation's coordination number, and this number is always greater than the regular valence or oxidation number of the metal. A coordination complex can be negative, neutral, or positively charged.
Negatively charged atoms, radicals or groups of atoms which travel to the anode or positive pole during electrolysis.
Antimicrobial peptides that form channels in membranes that are more permeable to anions than cations. They resemble MAGAININS, with their N-terminal region forming a positively charged amphipathic alpha helix, but containing an additional C-terminal segment.
Membrane proteins whose primary function is to facilitate the transport of negatively charged molecules (anions) across a biological membrane.
Characteristics of ELECTRICITY and magnetism such as charged particles and the properties and behavior of charged particles, and other phenomena related to or associated with electromagnetism.
Collaborations in biotechnology
Commercial and academic collaborations are used throughout the biotechnology and pharmaceutical sector to enhance research and product development. Collaborations can take the form of research and evaluation agreements, licensing, partnerships etc. ...