Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan.
Department of Biology, National Changhua University of Education, Changhua 50058, Taiwan.
Sensors (Basel). 2019 Feb 1;19(3):623. doi: 10.3390/s19030623.
The solubilized form of aluminum, Al, is present under acid soil conditions and toxic to both animals and plants. Detecting and quantifying Al is vital for both chemistry and biology. A new Schiff-based fluorescent turn-on sensor (probe ) for the selective detection of the Al ion was synthesized by coupling 2-hydroxy-1-naphthaldehyde and 2-aminoisoindoline-1,3-dione, and the structure was characterized by nuclear magnetic resonance spectra. The probe exhibited an excellent selective and sensitive response to the Al ion over other metal ions in DMSO-H₂O (1:9 v/v). Fluorescence quantification revealed that probe was promising for the detection and accumulation of Al. Treating rice seedlings with Al at 25⁻200 μM inhibited their growth. Al treatment produced reactive oxygen species in rice roots. Practical applications of the fluorescent probe for the quantification of Al in water samples and rice seedlings are demonstrated. Detecting the Al ion with the probe is easy and a potential alternative to existing analytical methods. The method can be used for detecting the Al content of aqueous solution and plant systems. The novel fluorescent probe has good potential for monitoring Al content in the environment and biological systems.
在酸性土壤条件下，铝以溶解形式存在，对动物和植物都具有毒性。检测和定量铝对于化学和生物学都至关重要。通过将 2-羟基-1-萘醛和 2-氨基异吲哚-1,3-二酮偶联，合成了一种新的基于席夫碱的荧光开启传感器（探针），用于选择性检测铝离子，并用核磁共振谱对其结构进行了表征。探针在 DMSO-H₂O（1:9 v/v）中对铝离子表现出优异的选择性和灵敏度响应，超过其他金属离子。荧光定量表明探针对铝的检测和积累具有很大的应用潜力。用 25-200 μM 的铝处理水稻幼苗会抑制其生长。铝处理在水稻根中产生了活性氧。荧光探针在水样和水稻幼苗中定量铝的实际应用得到了证明。用探针检测铝离子简单易行，是现有分析方法的潜在替代方法。该方法可用于检测水溶液和植物系统中的铝含量。新型荧光探针在监测环境和生物系统中的铝含量方面具有良好的应用前景。
