Synthesis and investigation of 1,8-naphthalimide derivative with sensor activity

P. Miladinova
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Abstract

The paper reports on the synthesis and fluorescence characteristics of novel 1,8-naphthalimide fluorophore. It was configured as a “fluorophore-spacerreceptor” system able to act as a pH-probe via PET (photoinduced electron transfer) fluorescence sensing mechanism. Due to the tertiary amine receptor the novel probe showed “off-on” switching properties under the transition from alkaline to acid media. Also, the ability of the probe to detect metal ions in water/ dimethylformamide (1:1, v/v) has been evaluated by monitoring the changes of its fluorescence intensity. Among the tested metal ions (Cu2+, Pb2+, Zn2+, Ni2+, Hg2+, Fe3+) only the presence of Fe3+ was efficiently detected by fluorescence quenching mechanism.
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具有传感活性的1,8-萘酰亚胺衍生物的合成与研究
报道了新型1,8-萘酰亚胺荧光团的合成及其荧光特性。它被配置为一个“荧光团-间隔受体”系统,能够通过PET(光致电子转移)荧光传感机制作为ph探针。由于叔胺受体的存在,新型探针在从碱性介质到酸性介质的转换过程中表现出“开关”特性。此外,通过监测其荧光强度的变化,评估了探针对水/二甲基甲酰胺(1:1,v/v)中金属离子的检测能力。在被测金属离子(Cu2+、Pb2+、Zn2+、Ni2+、Hg2+、Fe3+)中,只有Fe3+的存在被荧光猝灭机制有效检测。
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