Two alkynyl functionalized Co（Ⅱ）-MOFs as fluorescent sensors exhibiting selectivity and sensitivity for Fe3+ and nitroaromatic compounds

Two Co(II)-MOFs with different structures were successfully synthesized under the premise of designing two ligands containing alkynyl functional groups. Complexes 1 ([Co(TEPA)(TPT)2/3]·2DMF·H2O) and 2 ([Co(EPA)(TPT)]·1.5DMF·1.5H2O) show excellent luminescence properties. Meanwhile, as fluorescent sensors, complexes 1 and 2 exhibit selectivity and sensitivity for Fe3+ with the Ksv of 1.520 ×104 L/mol and 3.543 ×104 L/mol, which can rapidly detect nitroaromatic compounds in methanol and ethanol, especially for 2,4-NPH through fluorescence quenching with high quenching efficiency. In particular, the Ksv value of complexes 1 and 2 towards 2,4-NPH can reach up to 1.627 ×105 L/mol and 9.600 ×104 L/mol, demonstrating that complexes 1 and 2 are good candidates for the identification and detection of Fe3+and nitroaromatic compounds.

Two Co（Ⅱ）-MOFs with diffe re nt structures were successfully synthesized under the pre mise of designing two ligands containing alkynyl functional groups.Complexes 1([Co（TEPA）（TPT）2/3].2 DMF.H2 O)and 2（[Co（EPA）（TPT）]·1.5 DMF-1.5 H2 O）show excellent luminescence properties.Meanwhile,as fluorescent sensors,complexes 1 and 2 exhibit selectivity and sensitivity for Fe3+with the Ksv of 1.520 × 104 L/mol and3.543 × 104 L/mol,which can rapidly detect nitroaromatic compounds in methanol and ethanol,especially for 2,4-NPH through fluo rescence que nching with high quenching efficiency.In particula r,the Ksv value of complexes 1 and 2 towards 2,4-NPH can reach up to 1.627 × 105 L/mol and 9.600 × 104 L/mol,demonstrating that complexes 1 and 2 are good candidates for the identification and detection of Fe3+and nitroaromatic compounds.