Offene Metallcarboxylat‐Architekturen

Abstract

Alumosilicate und Metallphosphate sind die wichtigsten Beispiele für anorganische Materialien mit offenen Gerüsten. In den letzten Jahren stieß zu dieser Gruppe die Familie der Metallcarboxylate, zu der nicht nur Mono‐ und Dicarboxylate von Übergangs‐, Seltenerd‐ und Hauptgruppenmetallen, sondern auch eine Vielzahl von Hybridstrukturen zählen. Einige Carboxylate weisen neuartige magnetische Eigenschaften und Adsorptionseigenschaften auf. Mithilfe von Dicarboxylaten und verwandten Verbindungen kann man effektiv neue poröse Hybridstrukturen erhalten. In einigen dieser Strukturen verbrücken die Dicarboxylateinheiten zwei anorganische Einheiten. Bemerkenswert sind auch die neuen Hybridnanokomposite, in denen Gitter aus Cadmiumoxalat als Wirte für aufgeweitete Alkalimetallhalogenidstrukturen dienen. In diesem Aufsatz beschreiben wir die Synthesen, Strukturen und Eigenschaften von Metallcarboxylaten mit verschiedenartigen offenen Gerüsten.

“Design” in Chemical Synthesis—An Illusion?

“…Some subfields of inorganic molecular chemistry can come quite close to this state of the art in those cases in which a particular target configuration can be realized by specific reaction routes based on well-understood procedures, for example, employing electronic or steric effects and the use of reaction steps with high directionality such as salt eliminations. [15] Currently, the field of "coordination polymers" [16,17] (a term coined already in 1964 [18] ) is burgeoning worldwide [8,19,20] and boasts truly spectacular results [21,22] (e.g. Figure 1 in Ref.…”

Synthesis, Crystal Structure, Magnetic, Thermal and Fluorescent Properties of [Co(H2O)4(nia)2](suc)·(H2suc)

“…Metal carboxylates are particularly interesting since they not only form open-framework structures, but also because the carboxylate group may act as a linker between inorganic moieties [1]. α, ω-Alkane-dicarboxylates, such as succinate [suc 2− , (C 4 H 4 O 4 ) 2− ], have conformational freedom, and they can give novel frameworks, with for instance bidentate and monodentate linking modes, cis-cis, trans-trans and cis-trans orientation etc.…”

“…It is known that the presence of infinite M-O-M connectivities in metal dicarboxylate structures enables the electronic and magnetic exchange in one, two 0932-0776 / 10 / 0600-0695 $ 06.00 c 2010 Verlag der Zeitschrift für Naturforschung, Tübingen · http://znaturforsch.com or three dimensions [1], but the M-O-C-O-M pathway also needs to be taken into account for weak coupling [16]. Furthermore, it has ben reported that magnetic exchange interactions through hydrogen bonds are also possible [17].…”

Spectroscopic Characterization of Solvent‐Mediated Folding in Dicarboxylate Dianions

“…For example, they are used as antitumor drugs [1] and as building blocks for metal-organic framework materials, [2] and they are found in aerosol particles comprising photochemical smog.[3] Isolated dicarboxylate dianions are stable in the gas phase and serve as model systems for multiply charged anions. [4,5] The presence of two charge centers separated by a hydrophobic, aliphatic chain also makes them ideal for studying charge screening and solventmediated effects.…”