一种基于色酮席夫碱的用于铝（III）的比色和开启型荧光化学传感器。
A colorimetric and turn-on fluorescent chemosensor for Al(III) based on a chromone Schiff-base.
作者信息
Fan Long, Li Tian-rong, Wang Bao-dui, Yang Zheng-yin, Liu Chun-jiao
机构信息
College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Jan 24;118:760-4. doi: 10.1016/j.saa.2013.09.062. Epub 2013 Oct 3.
A simple Schiff-base receptor 7-methoxychromone-3-carbaldehyde-(pyridylformyl) hydrazone (MCNH) was prepared. It exhibits an "off-on-type" mode with high sensitivity in the presence of Al(3+). This compound could be used as Al(3+) probe in ethanol and it features visible light excitation (433 nm) and emission (503 nm) profiles. Upon binding of Al(3+), a significant fluorescence enhancement with a turn-on ratio over 800-fold was triggered. However, other metal ions had no such significant effect on the fluorescence. MCNH can also be used as a colorimetric chemosensor for Al(3+), which is easily observed from colorless to yellow-green by the naked-eye. The detection limit of MCNH for Al(3+) was as low as 1.9×10(-7) M.
制备了一种简单的席夫碱受体7-甲氧基色酮-3-甲醛-(吡啶甲酰基)腙(MCNH)。在Al(3+)存在下，它呈现出高灵敏度的“关-开型”模式。该化合物可作为乙醇中Al(3+)的探针，具有可见光激发(433 nm)和发射(503 nm)光谱。与Al(3+)结合后，触发了显著的荧光增强，开启比率超过800倍。然而，其他金属离子对荧光没有如此显著的影响。MCNH还可作为Al(3+)的比色化学传感器，肉眼很容易观察到从无色到黄绿色的变化。MCNH对Al(3+)的检测限低至1.9×10(-7) M。
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