Search

In this study, we have synthesized six new coordination polymers (CPs), namely {[Cu 6 (3,5-bip) 6 (H 2 O) 12 (SO 4) 6 ]·3H 2 O} n (1), [Co(3,5-bip) (H 2 O) 3 (SO 4)] n (2), {[Cu(1,3-bit) 2 (H 2 O) 2 ]·2(NO 3)} n (3), {[Cu 2 (1,3-bit) 2 (1,3-bcbb) 2 ]·4(H 2 O)} n (4), [Cu(4,4′-bibp) (H 2 O) (NO 3) 2 ] n (5), [Cu(4,4′-bibp) (4,4′-Hsbdc)] n (6) via solvothermal methods. The structures of these new CPs have been characterized by elemental analysis, FTIR, TG analysis, PXRD and single crystal X-ray diffraction techniques. Meanwhile, the title CPs are explored for adsorption of organic dyes, i.e., anionic dyes (congo red (CR), and methyl orange (MO)) and cationic dye (methylene blue (MB)) considered extensively as water colorants pollutants. Worth noting, complex 3 can adsorb anionic dyes (CR and MO) quickly; complex 6 shows great performance in CR adsorption. Kinetic study reveals that the adsorption process is performed via pseudo-second-order reaction. The dye removal investigations of complexes 3 and 6 support that ions exchange and H-bonding interactions between CPs and target organic dyes are significant factors, heavily affecting dye adsorption. They have excellent potential in wastewater treatment. The first author and corresponding authors made the greatest contribution to this article, while the other authors contributed similarly. Image 1 • Six new coordination polymers (CPs) have been hydrothermally prepared and characterized. • Complexes 3 could selectively adsorbs anionic dyes (CR and MO) quickly from aqueous solution with good repeat-ability. • Complex 6 shows great dye adsorption performance for CR with good repeat-ability in aqueous system. • This work highlights the advantages of 2D CPs as excellent hazardous dye adsorbents. [ABSTRACT FROM AUTHOR]