Three water-stable luminescent Zn(II) coordination polymers for highly sensitive and selective sensing of acetylacetone and Fe3+ ions

abstract

Three water-stable Zn(II) coordination polymers (CPs) including {[Zn-2(L)(TBIP)(1.5)(OH)center dot H2O}(n) (1), [Zn(L)(DBT)](n) (2) and [Zn(L)(0.5)(MIP)](n) (3) (L = 1,4-bis(2-methylbenzimidazol-1-yl) 2 butylene, H2TBIP = 5-tertbutyl isophthalic acid, H2DBT = 2,5-dibromoterephthalic acid and H2MIP = 5-methylisophthalic acid) were hydrothermally synthesized and characterized. 1 shows a rarely (3,4,4)-connected framework with point symbol of (3.8.9.10(2).11)(3.8.9)(3.8(2).9(2).10). 2 features a three-fold interpenetrating dia network. 3 possesses a 2D layer structure with a binodal (3,4)-connected 3,4L83 network. Both 1 and 2 present selective and sensitive detection of acetylacetone (acac) with high quenching efficiency (K-sv) values (2651 M (-1) for 1 and 3923 M -1 for 2) and low detection limit (1.43 mu M for 1 and 0.86 mu M for 2). 1, 2 and 3 could be treated as efficient probes for sensing of Fe3+ ions.

keywords

METAL-ORGANIC FRAMEWORK; CRYSTAL-STRUCTURES; ZN-MOF; LIGANDS; PROBE; ACID; BIS(BENZIMIDAZOLE); FLUORESCENCE; COMPLEXES; LINKERS

subject category

Chemistry

authors

Zhu, H; Fu, LS; Liu, D; Li, YH; Dong, GY

Groups

acknowledgements

The project was supported by the National Natural Science Foundation of China (51474086]). This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement.

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