摘要
以8-羟基喹啉-5-甲醛和吡啶-2, 6-二甲酸二甲酯为原料,合成了一种氟硼二吡咯(BODIPY)型荧光化学传感器Ⅰ,通过FTIR、^(1)HNMR、^(13)CNMR和ESI-MS对其结构进行了表征,利用紫外/荧光分光光度法研究了传感器Ⅰ的传感性能。结果表明,在V(DMF)∶V(水)=1∶4介质中,传感器Ⅰ对Cu^(2+)表现出明显的荧光猝灭响应,猝灭率高达97.7%,检测限为5.7×10^(–8)mol/L。此外,配合物Ⅰ-Cu^(2+)对焦磷酸根(PPi)表现出明显的荧光增强响应,检测限为1.9×10^(–8) mol/L,表明传感器Ⅰ对Cu^(2+)和PPi的识别检测具有较高的灵敏度和抗干扰能力。通过络合曲线和核磁滴定数据分析,得出传感器Ⅰ同Cu^(2+)以及配合物Ⅰ-Cu^(2+)对PPi的络合物质的量比均为1∶1。传感器Ⅰ对Cu^(2+)和PPi测试的有效pH范围为5~9,且循环响应测试可稳定进行4次。
A fluorescent chemical sensor based on fluoroboron dipyrrole(BODIPY)(Ⅰ) was synthesized using 8-hydroxyquinoline-5-carbaldehyde and dimethyl pyridine-2, 6-dicarboxylate as raw materials. The structure was characterized by FTIR, ^(1)HNMR, ^(13)CNMR and ESI-MS. The sensing performance of sensor Ⅰwas studied by UV-Vis/fluorescence spectrophotometry. The results showed that sensorⅠhad obviously "on-off" fluorescence response to Cu^(2+) in V(DMF)∶V(water)=1∶4 solution. The quenching efficiency reached a maximum of 97.7%, and the detection limit of sensorⅠto Cu^(2+) was 5.7×10^(–8) mol/L. Moreover,complex Ⅰ-Cu^(2+) exhibited obviously "off-on" fluorescence response to pyrophosphate(PPi) with a detection limit of 1.9×10^(–8) mol/L, indicating that sensorⅠpossessed high sensitivity and anti-interference ability in recognition and detection of Cu^(2+) and PPi. Job′s plots and 1 HNMR titration data revealed that the complexing mole ratios of sensorⅠto Cu^(2+) and complexⅠ-Cu^(2+) to PPi were 1∶1. The effective pH range of sensorⅠto Cu^(2+) and PPi was in the range from 5 to 9, and the cycle response test could reach 4 times.
作者
孟宪娇
MENG Xianjiao(Basic Sciences Depart,Shanxi Agricultural University,Jinzhong 030801,Shanxi,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2021年第10期2034-2041,2049,共9页
Fine Chemicals
基金
山西农业大学科技创新项目(2020BQ18)
山西省优秀博士来晋工作奖励(SXYBKY2019046)
山西省高等学校创新项目(2020L0140)。
