A series of coordination polymers based on terphenyl tetracarboxylates and bis-pyridyl ligands with water vapor sorption properties. Issue 2 (4th January 2017)

• Record Type: Journal Article
• Authors: Li, Ling; Lv, Lei; Huang, Ru-Dan
• Is Part Of: RSC advances. Volume 7:Issue 2(2017)
• Page Start: 975
• Page End: 984
• Publication Date: 2017-01-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra25319a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Six new coordination polymers have been synthesized based on terphenyl tetracarboxylates (H4 L1, H4 L2) and bis-pyridyl ligands (bpfp, bpe and bpmp). Abstract : Six new coordination polymers, namely, {[Mn2 (L1)(bpfp)(H2 O)2 ]·6H2 O·(CH3 OH)} n (1 ), {[Mn4 (μ3 -O)2 (L1)2 (bpe)2 (H2 O)2 ]·2H2 O} n (2 ), [Ni(HL1)(Hbpmp)(H2 O)2 ] n (3 ), [Co2 (μ2 -OH)(HL1)(bpmp)(H2 O)4 ] n (4 ), {[Co2 (L2)(bpfp)(H2 O)2 ]·4H2 O} n (5 ), {[Co2 (L2)2 (bpe)2 (H2 O)2 ·2H2 O]·(NH4 )4 } n (6 ) (H4 L1 = [1, 1′:4′, 1′′-terphenyl]-2, 2′′, 5, 5′′-tetracarboxylic acid, H4 L2 = [1, 1′:4′, 1′′-terphenyl]-3, 3′′, 5, 5′′-tetracarboxylic acid, bpfp = bis(4-pyridylformyl)piperazine, bpe = 1, 2-bis(pyridin-4-yl)ethane and bpmp = N, N ′-bis(4-pyridyl)piperazine) were synthesized under hydrothermal conditions by terphenyl tetracarboxylates, bis-pyridyl ligands and transition metal salts. These six complexes were characterized by elemental analysis, infrared (IR) spectroscopy, thermogravimetric analysis (TGA), single-crystal X-ray diffraction, powder X-ray diffraction (PXRD) and fluorescence spectroscopy. Complexes1 and5 possess three-dimensional (3D) (4, 6)-connected networks with {4 3 ·6 3 }2 {4 6 ·6 6 ·8 3 } and {4 4 ·6 10 ·8}{4 4 ·6 2 } topologies, respectively. Complexes2–4 and6 feature two-dimensional (2D) networks, which are expanded into 3D supramolecular frameworks via hydrogen bonding interactions. Desorption of lattice water molecules in complexes1 and2 was analyzed, and the values of water vapor uptake are 15.17 mL g −1 and 27.24 mL g −1, respectively.