Abstract Four amino acid Schiff base complexes—one with a 3D network structure ({[Cd 2 (PYSA) 2 (H 2 O)]·3H 2 O} n ( 1 )) and the other three with a supramolecular network structure {[Co(PYSA) (H 2 O) 2 ]·H 2 O} n ( 2 ), {([Zn(PYSA)(H 2 O) 2 ]·H 2 O} n ( 3 ), {[Mn(PYSA)(H 2 O) 2 ]·H 2 O} n ( 4 )), (PYSA = (S-2-(pyridine-4-ylmethylamino) succinic acid)—were successfully obtained under hydrothermal conditions. Among the four complexes, photoluminescence analysis revealed that complex 1 exhibited high selectivity and sensitivity in the detection of iron ions. In particular, it was able to qualitatively and quantitatively detect iron ions at low concentrations without interference from other ions. With a Fe 3+ concentration of 0.01 mol/L, the detection limit was 0.81 μM, K sv = 2.46 × 10 4 L/mol. In addition, complex 2 exhibited excellent catalytic performance toward 4-nitrophenol (4-PNP). Graphic abstract Four amino acid Schiff base complexes 1 – 4 were synthesized by a hydrothermal method. Among the four, complex 1 exhibited good fluorescence sensing performance in the detection of Fe 3+ in water. In addition, the catalytic activity of complex 2 for 4-PNP was preliminarily investigated, which showed an ability to reduce 4-PNP to 4-PAP.

中文翻译：

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吡啶-氨基酸构建的过渡金属配合物：荧光传感和催化性能

配合物2对4-硝基苯酚（4-PNP）表现出优异的催化性能。图形摘要 通过水热法合成了四种氨基酸席夫碱复合物 1-4。在这四种中，配合物1在检测水中Fe 3+ 时表现出良好的荧光传感性能。此外，初步研究了配合物2对4-PNP的催化活性，显示了将4-PNP还原为4-PAP的能力。