Dicyanometallate, VII [1] Darstellung und Kristallstruktur von Gadolinium-tris-dicyanoaurat (I), Gd[Au(CN)₂]₃·2,3H₂O / Dicyano Metallates, VII [1] Preparation and Crystal Structure of Gadolinium-tris-dicyanoaurate (I), Gd[Au(CN)₂]₃·2,3H₂O

Abstract

Gadolinium-fm-dicyanoaurate(I), Preparation, Crystal StructureThe title compound has been prepared by adding a stoichiometric amount of gadolinium nitrate hexahydrate to an aqueous solution of potassium dicyanoaurate(I). Single crystals could be obtained by slow evaporation from the saturated solution. The compound crystallizes hexagonally, space group P-62m, with a = 6.6319(6), c = 9.108(2) Ä, c/a = 1.3734 and Z = 1. The structure comprises layers of considerably bent dicyanoaurate groups. The gold atoms form a nearly regular 3.6.3.6 -Kagome net with a layer sequence AA.. and an Au -Au distanceoof 3.316 (2) Hinweise auf einen Kristallwassergehalt der GdVerbindung erhielten wir aus Elementaranalysen, die für mehrere Kristalle stets H-Gehalte von 1 -1,5% ergaben. Das Ergebnis der Kristallstrukturanalyse bestätigte, daß diese H-Gehalte auf strukturell gebundenes Kristallwas ser zurückzuführen sind. StrukturanalyseNach optischer Überprüfung der Kristallqua lität und Durchmusterung einer größeren Zahl von Kristallen der Gd-Verbindung mittels Schwenkund Weißenbergaufnahmen konnte schließlich ein für die Strukturanalyse geeignetes Individuum 0 9 3 9 -5 0 7 5 /9 6 /0 5 0 0 -0 6 9 8 $ 06.00

Ce/Au(CN)2–‐Based Coordination Polymers Containing and Lacking Aurophilic Interactions

“…The structure of CeAu 3 was found to be a member of the isomorphous set Ln[Au(CN) 2 ] 3 · 3H 2 O (Ln = La,13 Pr,14 Nd,15 Sm,34 Eu,23 Gd,23,34 Tb;20 note that the Sm and Gd structures were previously incorrectly described.) CeAu 3 contains a nine‐coordinate cerium centre in a tri‐capped trigonal prismatic geometry.…”

A New Basic Motif in Cyanometallate Coordination Polymers: Structure and Magnetic Behavior of M(μ‐OH2)2[Au(CN)2]2(M=Cu, Ni)

“…A series of complex three-dimensional arrays of Ln[Au(CN) 2 ] 3 ·2,3 H 2 O (Ln= La, Gd, Sm, Eu, Tb, Dy) have also been prepared. [26] Similar to the situation for Prussian Blue and its many analogues, despite an aqueous synthesis, these [Au(CN) 2 ]-based products either do not retain water at all, or the water molecules bind to the metal cation without significantly impacting the basic structural motif.…”

Heterobimetallic lanthanide–gold coordination polymers: structure and emissive properties of isomorphous [nBu4N]2[Ln(NO3)4Au(CN)2] 1-D chains

“…The previously reported Ln[Au(CN) 2 ] 3 •nH 2 O systems have been well studied in this regard. [11][12][13][14][15][16][17][18][19][20][21][22][23][24] Throughout the Ln[Au(CN) 2 ] 3 •nH 2 O series, various optical phenomena have been observed, including the emission resulting from the efficient energy transfer from [Au(CN) 2 ] − to Ln 3+ , which is ultimately quenched at higher temperatures via a non-radiative charge transfer mechanism in the case of Ln = Eu. In the case of Ln = Tb, the energy transfer from [Au(CN) 2 ] − is not as efficient and Tb 3+ -based emission is quenched at higher temperatures.…”