摘要
以甘氨酸与5-氯水杨醛为原料,构建了一种高效的席夫碱Zn^(2+)荧光探针分子L,结构由^(1)HNMR和^(13)CNMR进行了表征,性能通过光谱实验进行了研究。光谱分析实验结果表明,探针分子L对Zn^(2+)具有出色的选择性和灵敏度,在0~14μmol/L浓度范围内,体系荧光强度与Zn^(2+)浓度呈线性关系,检出限为13.72 nmol/L,在365 nm紫外灯下裸眼观察到明显的荧光颜色变化,可实现Zn^(2+)可视化检测。通过Job曲线和DFT理论计算对识别机理进行了研究,结果表明,探针分子L与Zn^(2+)以摩尔比2∶1结合。此外,水样检测实验表明探针分子L具有应用于检测实际水样中Zn^(2+)的潜力。
A novel efficient Schiff-base fluorescent probe L is synthesized from glycine and 5-chlorosalicylaldehyde,and characterized by means of 1H-NMR and 13C-NMR.Its performance is studied by means of spectral experiments.It is verified that the probe L shows excellent selective and sensitive to Zn^(2+).There is a good linear relationship between the fluorescence intensity of probe L and the concentration of Zn^(2+)in a range of 0 to 14μmol·L^(-1).The detection limit is 13.72 nmol·L^(-1).Visible color change can be observed with the naked eye under the ultraviolet lamp,which can realize the visual detection of Zn^(2+).The recognition mechanism is explored through Job curve and DFT theoretical calculation,and the results show that the probe molecule L complexes with Zn^(2+)in a molar ratio of 2∶1.Moreover,it is verified through water sample tests that probe L can be used to detect Zn^(2+)in actual water samples.
作者
赖倪
张胜婷
邹菲
李中燕
袁霖
LAI Ni;ZHANG Sheng-ting;ZOU Fei;LI Zhong-yan;YUAN Lin(School of Chemistry and Biological Engineering,Hunan University of Science and Engineering,Yongzhou 425199,China)
出处
《现代化工》
CAS
CSCD
北大核心
2023年第12期242-245,共4页
Modern Chemical Industry
基金
湖南省自然科学基金项目(2021JJ30291)
湖南省教育厅项目(21A0518,21C0691)
国家级大学生创新创业训练计划项目(202210551005X,202210551011X)
湖南省大学生创新创业训练计划项目(湘教通[2022]174号4207、4213)
永州市指导性科技计划项目(永科发[2020]19号第12项)。
关键词
席夫碱
荧光探针
锌离子
识别机理
水样检测
Schiff-base
fluorescent probe
zinc ion
recognition mechanism
water samples detection
