共 50 条
Naphthalene-based turn-on fluorescent probe for sensitively recognizing Zn2+
被引:4
作者:
Tong, Junfeng
[1
]
Liu, Wuyan
[1
]
Huang, Yubo
[1
]
Liu, Bo
[1
]
Zhang, Wenxiang
[2
]
Li, Jianfeng
[1
]
Xia, Yangjun
[1
]
机构:
[1] Lanzhou Jiaotong Univ, Sch Mat Sci & Engn, Lanzhou 730070, Peoples R China
[2] Petrochina Lanzhou Petrochem Co, Lanzhou, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Chelation enhanced fluoresce;
keto-amine isomer;
naphthalene;
pyridine;
zinc ion;
SCHIFF-BASE;
SELECTIVE DETECTION;
AQUEOUS-SOLUTION;
SENSOR;
ZINC;
CHEMOSENSOR;
IONS;
DESIGN;
HG2+;
AL3+;
D O I:
10.1080/15421406.2022.2105595
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
A Schiff-base type fluorescent sensor (PLB3) was synthesized by nucleophilic addition-elimination between 2-hydroxy-1-naphthaldehyde and 5-chloro-2-aminopyridine. Single crystal X-ray diffraction analysis demonstrated keto-amine isomer was predominantly adopted. 8-Fold fluorescence-enhanced recognition for detecting Zn2+ was chelation enhanced fluoresce (CHEF) mechanism. Also, PLB3 could distinguish well Zn2+ from analogue Cd2+. Job's plot fluorescence titration and UV-Vis titration revealed the 1:1 stoichiometry between Zn2+ and PLB3. The association constant (K-a) and limit of detection (LOD) were 5.14 x 10(7) M-1 and 0.33 mu M, respectively. The excellent selective and sensitive properties urge PLB3 to detect the trace amounts of Zn2+ in the environmental systems.
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页码:49 / 61
页数:13
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