Mukherjee Soma, Talukder Shrabani
Department of Environmental Science, University of Kalyani, Nadia, Kalyani, 741235, West Bengal, India.
J Fluoresc. 2016 May;26(3):1021-8. doi: 10.1007/s10895-016-1790-7. Epub 2016 Apr 1.
A new Schiff-base, HL luminescent chemosensor of 1-amino pyrene and 8-hydroxy quinoline-2-carboxaldehyde was synthesized which demonstrates selective fluorimetric detection of Fe(3+) in aqueous medium with detection limit of 2.52 × 10(-8) M. The receptor shows selective 'turn-on' response towards Fe(3+) over other metal ions. This gradual 'turn-on' fluorescence response for Fe(3+) may be induced via CHEF (chelation-enhanced fluorescence) through close proximity of pyrene rings. The stoichiometry and binding property of HL with Fe(3+) was examined by emission studies. In presence of Fe(3+), HL also exhibits reversible change in emission pattern with EDTA and thus offers an interesting property of molecular 'INHIBIT' logic gate with Fe(3+) and EDTA as chemical inputs.
合成了一种新型的席夫碱HL发光化学传感器，它由1-氨基芘和8-羟基喹啉-2-甲醛组成，在水介质中能对Fe(3+)进行选择性荧光检测，检测限为2.52×10(-8) M。该受体对Fe(3+)表现出相对于其他金属离子的选择性“开启”响应。Fe(3+)的这种逐渐“开启”的荧光响应可能是通过芘环的紧密接近经由CHEF（螯合增强荧光）诱导的。通过发射研究考察了HL与Fe(3+)的化学计量关系和结合性质。在Fe(3+)存在下，HL与EDTA也表现出发射模式的可逆变化，因此提供了一种以Fe(3+)和EDTA作为化学输入的有趣的分子“抑制”逻辑门特性。
