A series of five-coordinated copper coordination polymers for efficient degradation of organic dyes under visible light irradiation

作者：Shi, Lu-Lu; Zheng, Tian-Rui; Li, Min; Qian, Lin-Lu; Li, Bao-Long^*; Li, Hai-Yan

来源：RSC Advances, 2017, 7(38): 23432-23443.

DOI：10.1039/c7ra03268d

• N-DONOR LIGANDS
• HYBRID MATERIALS
• CRYSTAL-STRUCTURES
• PHOTOCATALYTIC ACTIVITY
• STRUCTURAL VARIABILITY
• LUMINESCENT PROPERTIES
• FRAMEWORKS SYNTHESES
• CONSTRUCTION
• NETWORKS
• ACID

The copper(II) coordination polymers {[Cu-4(OH)(2)(bix)(2)(1,2,4-btc)(2)(H2O)(2)]center dot 3H(2)O} n (1), [Cu-2(bix)(ip)(2)](n) (2), [Cu-2(bix)(Meip)(2)](n) (3), {[Cu-2(bix)(pbda)(2)]center dot H2O}(n) (4) and {[Cu-2(bix)(1.5)(2,5-pydc)(2)(H2O)]center dot 2H(2)O}(n) (5) were synthesized using the hydrothermal method (bix = 1,4-bis(2-methyl-imidazol-1-ylmethyl) benzene, 1,2,4-btc = 1,2,4-benzenetricarboxylate, ip = isophthalate, Meip = 5-methyl-isophthalate, pbda = 1,4-benzenediacatate, 2,5-pydc = 2,5-pyridine-dicarboxylate). 1 exhibits a (3,5)-connected 2D network with the point symbol of (42$ 6)(42$ 67$ 8) based on the [Cu-2(m-OH)] dimer. 2 exhibits the 2-fold interpenetrating three-dimensional pcu network based on the [Cu-2(COO)(4)] dimers. 3 exhibits the 2-fold interpenetrating three-dimensional pcu network based on the [Cu-2(COO)(2)] and [Cu-2(COO) 4] dimers. 4 shows an unusual 6-connected self-catenated 3D network with the point symbol of (4(4)center dot 6(10)center dot 8) based on [Cu-2(COO) 4] dimers. 5 exhibits a (3,4)-connected 2D network with the point symbol of (4(2) center dot 6)(4(2) center dot 6(3) center dot 8). 1-5 are semiconducting in nature, with E-g of 2.21 eV (1), 2.35 eV (2), 2.41 eV (3), 2.13 eV (4), and 2.62 eV (5). 1-5 are highly efficient and universal photocatalysts for the degradation of the organic dyes methylene blue (MB), rhodamine B (RhB) and methyl orange (MO) under visible light irradiation, and are very stable and easily separated from the reaction system for reuse. This work shows that the coordinated unsaturated copper coordination polymers should be very promising photocatalysts for degradation of organic dyes.

• 出版日期2017
• 单位苏州大学