Journal article
Luminescent Zn(II) Coordination Polymers for Highly Selective Sensing of Cr(III) and Cr(VI) in Water
Inorganic Chemistry, Vol.56(8), pp.4669-4678
2017
Abstract
Three photoluminescent zinc coordination polymers (CPs), {[Zn2 (tpeb) 2 (2,5-tdc)(2,5-Htdc) 2 ].2H2O } n (1) , {[Zn2 (tpeb) 2 (1,4-ndc)(1,4-Hndc) 2 ].2.6H2O } n (2), and {[Zn2(tpeb)2(2,3-ndc)2].H2O}n (3) (tpeb = 1,3,5-tri-4-pyridyl-1,2- ethenylbenzene, 2,5-tdc = 2,5-thiophenedicarboxylic acid, 1,4-ndc = 1,4-naphthalenedicarboxylic acid, and 2,3-ndc = 2,3-naphthalenedicarboxylic acid) were prepared from reactions of Zn(NO3)2.6H2O with tpeb and 2,5-H2tdc, 1,4-H2ndc, or 2,3-H2ndc under solvothermal conditions. Compound 1 has a two-dimensional (2D) grid-like network formed from bridging 1D [Zn(tpeb)]n chains via 2,5-tdc dianions. 2 and 3 possess similar one-dimensional (1D) double-chain structures derived from bridging the [Zn(tpeb)]n chains via pairs of 1,4-ndc or 2,3-ndc ligands. The solid-state, visible emission by 1-3 was quenched by Cr3+, CrO4 2-, and Cr2O7 2- ions in water with detection limits by the most responsive complex 3 of 0.88 ppb for Cr3+ and 2.623 ppb for Cr2O7 2- (pH = 3) or 1.734 ppb for CrO4 2- (pH = 12). These values are well below the permissible limits set by the USEPA and European Union and the lowest so far reported for any bi/ trifunctional CPs sensors. The mechanism of Cr3+ luminescence quenching involves irreversible coordination to free pyridyl sites in the CP framework, while the Cr6+ quenching involves reversible overlap of the absorption bands of the analytes with those of the excitation and/or emission bands for 3.
Details
- Title
- Luminescent Zn(II) Coordination Polymers for Highly Selective Sensing of Cr(III) and Cr(VI) in Water
- Authors
- Tian-Yi Gu (Author) - Soochow University, ChinaMing Dai (Author) - Soochow University, ChinaDavid James Young (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringZhi-Gang Ren (Author) - Shanghai Institute of Organic Chemistry, ChinaJian-Ping Lang (Author) - Soochow University, China
- Publication details
- Inorganic Chemistry, Vol.56(8), pp.4669-4678
- Publisher
- American Chemical Society
- Date published
- 2017
- DOI
- 10.1021/acs.inorgchem.7b00311
- ISSN
- 0020-1669
- Organisation Unit
- University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99450922202621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Chemistry, Inorganic & Nuclear