Seidlhofer, Beatrix, Djamil, John, Näther, Christian and Bensch, Wolfgang (2011) From Zero- to Three-Dimensional Thioantimonates: [Ni(aepa)2]3Sb6S12(aepa = C5H15N3=N-(aminoethyl)-1,3-propandiamine), Containing the Unique [Sb6S12]6–Cyclic Anion, [Ni(aepa)2]6(Sb3S6)2(SO4)3·2H2O, with Isolated [Sb3S6]3–anions and [Ni(aepa)2]Sb4S7, Characterized by a Three-Dimensional Network Structure. Crystal Growth & Design, 11 (12). pp. 5554-5560. DOI 10.1021/cg201122e.

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Abstract

The new thioantimonates [Ni(aepa)2]3Sb6S12 (1), [Ni(aepa)2]6(Sb3S6)2(SO4)3·2H2O (2), and [Ni(aepa)2]Sb4S7 (3) (aepa = C5H15N3 = N-(aminoethyl)-1,3-propandiamine) were obtained under solvothermal conditions by slightly varying the reaction conditions. In all compounds the [Ni(aepa)2]2+ complexes were formed in situ during the chemical reactions. Compound 1 features the new unique [Sb6S12]6– cyclic anion composed by vertex-linked SbS3 trigonal pyramids. This [Sb6S12]6– cyclic anion represents the largest isolated thioantimonate(III) anion. In the structure of [Ni(aepa)2]6(Sb3S6)2(SO4)3·2H2O, three SbS3 units are corner-linked to form a Sb3S3 hetero ring adopting a twist conformation. Additionally, the new nickel complex [Ni(aepa)2]2Cl2 was isolated from the same reaction slurry and was structurally characterized. Compound 3 represents a rare example of a three-dimensional thioantimonate(III) network. The [Sb4S7]2– anion contains large Sb14S14 rings with dimension of 6.1 × 16.1 Å2. The structure directing effect of the in situ formed cations is obvious because [Ni(aepa)2]2+ molecules are located in pairs above and below the large rings. The first photocatalytic hydrogen evolution tests exhibit promising results for compound 3.

Document Type:	Article
Research affiliation:	Kiel University > Kiel Marine Science OceanRep > The Future Ocean - Cluster of Excellence Kiel University
Refereed:	Yes
Open Access Journal?:	No
Publisher:	American Chemical Society
Projects:	Future Ocean
Date Deposited:	12 Jun 2018 10:58
Last Modified:	28 Mar 2019 12:40
URI:	https://oceanrep.geomar.de/id/eprint/43351

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