Synthesis of the first Zn6-hexagon sandwich-tungstoantimonate via rearrangement of a non-lacunary Krebs-type polyoxotungstate12. Issue 44 (18th October 2018)

• Record Type: Journal Article
• Authors: Tanuhadi, Elias; Roller, Alexander; Giester, Gerald; Kampatsikas, Ioannis; Rompel, Annette
• Is Part Of: Dalton transactions. Volume 47:Issue 44(2018)
• Page Start: 15651
• Page End: 15655
• Publication Date: 2018-10-18
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c8dt02787k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : For the first time, the Krebs-POM archetype was used as a non-lacunary precursor expanding the rarely reported hexagon sandwich-POM family. Abstract : A novel synthetic pathway to obtain the first Zn6 hexagon tungstoantimonate [(Zn(H2 O))6 ( B -α-SbW9 O33 )2 ] 6− ([Zn6 -α-SbW9 ] (1 )) via rearrangement of a non-lacunary Krebs-POM precursor (C12 N4 H11 )4 K4 [(Mn(H2 O)3 )2 ((Mn0.5 W0.5 )O2 )2 ( B -β-SbW9 O33 )2 ] ([Mn-β-SbW9 ]) has been developed. Addition of ortho -phenylenediamine (opda) in order to optimize the synthesis of [Mn-β-SbW9 ] led to the crystallization of a novel Krebs-type Zn-POM (C12 N4 H11 )4 Na5 [((Zn0 .8 W0.2 )(H2 O)3 )2 ((Zn0.2 W0.8 )O2 )2 ( B -β-SbW9 O33 )2 ] ([(Zn/W)2 -β-SbW9 ] (2 )) comprising four disordered Zn-centers after replacement of MnCl2 with ZnCl2 . The compounds were characterized in the solid state by single-crystal and powder X-ray diffraction (XRD), IR spectroscopy, thermogravimetric analysis (TGA) and elemental analysis and in solution by UV-vis spectroscopy and ESI-mass spectrometry. The Krebs-POM archetype and the Zn6 hexagon tungstoantimonate have been investigated towards their interactions with Human Serum Albumin (HSA) as a model protein using SDS-PAGE and trypthophan fluorescence quenching.