In:
CrystEngComm, Royal Society of Chemistry (RSC), Vol. 24, No. 4 ( 2022), p. 828-836
Abstract:
Four new Keggin-type polyoxometalate (POM)-based metal–organic complexes constructed from two flexible bis(pyrazine)–bis(amide) ligands N , N ′-bis(2-pyrazinecarboxamide)-1,2-ethane (bpae) and N , N ′-bis(5-methyl-2-pyrazinecarboxamide)-1,2-ethane (bmpae), namely, [Cu 2 (bpae) 2 (H 2 O) 2 (PMo VI 9 Mo V 3 O 39 )]·5.5H 2 O (1), [Cu 2 (bpae) 2 (SiMo 12 O 40 )]·3H 2 O (2), {[Co 2 (bmpae) 2 (H 2 O) 4 ](SiW 12 O 40 )}·1.5H 2 O (3), and [Cu 2 (bmpae) 2 (SiW 12 O 40 )]·8H 2 O (4), have been hydrothermally synthesized and structurally characterized. Complex 1 is a [PMo VI 9 Mo V 3 O 39 ] 4− (PMo 12 )-based 3D coordination framework, which is constructed by three kinds of 1D chains: [Cu(bpae)] n 2 n + , [PMo 12 ] n 4 n − and [Cu(PMo 12 )] n 2 n − chains. Complex 2 shows a 2D structure, which is composed of tridentate [SiMo 12 O 40 ] 4− anions (SiMo 12 ) and [Cu(bpae)] n 2 n + chains. Complex 3 is a 0D structure, which is constructed from [Co 2 (bmpae) 2 ] 4+ binuclear rings and discrete [SiW 12 O 40 ] 4− (SiW 12 ) anions. In 4, the 1D [Cu(bmpae)] n 2 n + chains are connected by the SiW 12 anions to produce a 2D structure. The diverse structures of 1–4 demonstrate that the different metal ions and POMs have pivotal influences on the formation of the final coordination frameworks. In this work, the adsorption performances of 1–4 for the organic dyes gentian violet (GV) and methylene blue (MB) were examined, and 1 possesses good reusability. In addition, 1–4 can be employed as amperometric sensors to identify multiple analytes (BrO 3 − , NO 2 − , Cr( vi ) and Fe( iii ) ions) and possess good selectivity in the presence of some other ions.
Type of Medium:
Online Resource
ISSN:
1466-8033
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2025075-7
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