A phthalocyanine-porphyrin triad for ratiometric fluorescent detection of Lead(II) ions

被引：24

作者：

Qi, Dongdong ^{[1
]}

Zhang, Jinghui ^{[1
]}

Zhang, Dongli ^{[1
]}

Zhu, Mengliang ^{[1
]}

Gong, Lei ^{[1
]}

Su, Chaorui ^{[1
]}

Lu, Wenxin ^{[2
]}

Bian, Yongzhong ^{[1
]}

Jiang, Jianzhuang ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Chem, Beijing Key Lab Sci & Applicat Funct Mol & Crysta, Beijing 100083, Peoples R China

[2] Shandong Univ Sci & Technol, Coll Chem & Environm Engn, Qingdao 266590, Shandong, Peoples R China

来源：

DYES AND PIGMENTS | 2020年 / 173卷

关键词：

Phthalocyanine; Porphyrin; Lead ion; Ratiometric fluorescent sensor; Fluorescence resonance energy transfer; PB2+; FRET; SENSORS; PB(II); PROBES;

D O I：

10.1016/j.dyepig.2019.107941

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A phthalocyanine-porphyrin hetero-triad H2Pc-beta-(ZnPor)(2) (1) was designed for the ratiometric fluorescent detection of lead(II) ions. The triad 1 features a high efficient intramolecular fluorescence resonance energy transfer (FRET) process from the two zinc-porphyrin (ZnPor) units to the metal-free phthalocyanine (H2Pc) unit. The selective binding of Pb2+ to H2Pc can effectively quench the emission of phthalocyanine unit, also recover the emission of ZnPor units by suppressing the intramolecular FRET process, thus leading to remarkable ratiometric fluorescent responses. The emission intensity ratio of ZnPor and H2Pc (F-605/F-700) experiences an 82-fold enhancement upon the addition of Pb2+ (0-3 equiv) to a solution of 1 (2.0 mu M in THF/CH3OH, 4:1 in v/v), and displays a good linear relationship to Pb2+ concentration in the range of 0-2.0 mu M, resulting in a limit of detection (LOD) value down to 4.1 nM (0.86 ppb).

引用

页数：5

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