CdII -Organic Frameworks Fabricated with a N-Rich Ligand and Flexible Dicarboxylates: Structural Diversity and Multi-Responsive Luminescent Sensing for Toxic Anions and Ethylenediamine.
Chem Asian J
; 14(23): 4420-4428, 2019 Dec 02.
Article
em En
| MEDLINE
| ID: mdl-31709758
ABSTRACT
Three metal-organic frameworks {[Cd(L)(glu)]â
3 H2 O}∞ (1), {[Cd2 (L)2 (adi)2 ]â
5 H2 O}∞ (2) and {[Cd(L)(sub)]â
3 H2 Oâ
DMA }∞ (3) (L=pyridine-3,5-bis(5-azabenzimidazole), H2 glu=glutaric acid, H2 adi=adipic acid and H2 sub=suberic acid) were obtained under solvothermal conditions. Complexâ
1 shows a 2D (4,4) network constructing of Cd2 -glu and Cd-L chains. Complexâ
2 presents a 2-fold interpenetrating 3D framework with pcu topology. Complexâ
3 is a 3D framework with cds topology. Three complexes with versatile structures were obtained by changing aliphatic dicarboxylate ligands with different lengths based on a N-rich ligand. Moreover, the fluorescence measurements indicate that complex 1 is a good multifunctional chemosensor for the detection of Cr2 O7 2- and MnO4 - anions by fluorescence quenching effect, and ethylenediamine by fluorescence enhancement effect, with detection limits of 1.196â
ppm, 0.551â
ppm and 64.572â
ppm, respectively. Both complexesâ
2 and 3 can selectively sense Cr2 O7 2- anion with detection limits of 1.126â
ppm for 2 and 0.831â
ppm for 3 by a fluorescence quenching effect.
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MEDLINE
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En
Revista:
Chem Asian J
Ano de publicação:
2019
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Article