Zn2+/Cd2+ optical discrimination by fluorescent acridine-based bis-macrocylic receptors

被引：20

作者：

Aragoni, M. Carla ^{[1
]}

Arca, Massimiliano ^{[1
]}

Bencini, Andrea ^{[2
]}

Caltagirone, Claudia ^{[1
]}

Conti, Luca ^{[2
]}

Garau, Alessandra ^{[1
]}

Valtancoli, Barbara ^{[2
]}

Isaia, Francesco ^{[1
]}

Lippolis, Vito ^{[1
]}

Palomba, Francesco ^{[3
]}

Prodi, Luca ^{[3
]}

Zaccheroni, Nelsi ^{[3
]}

机构：

[1] Univ Cagliari, Dipartimento Sci Chim & Geol, Monserrato, Italy

[2] Univ Florence, Dipartimento Chim Ugo Schiff, Florence, Italy

[3] Univ Bologna, Dipartimento Chim G Ciamician, Bologna, Italy

来源：

SUPRAMOLECULAR CHEMISTRY | 2017年 / 29卷 / 11期

关键词：

Fluorescent chemosensors; acridine; Zn2+; Cd2+ optical discrimination; thio; aza macrocycles; MULTIWAVELENGTH SPECTROSCOPIC DATA; METAL-IONS; LUMINESCENT CHEMOSENSORS; EQUILIBRIUM-CONSTANTS; COLORIMETRIC SENSORS; RECOGNITION; CADMIUM; DESIGN; ANIONS; CD2+;

D O I：

10.1080/10610278.2017.1387262

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new acridine-based fluorescent chemosensor, L2, featuring two sulfurated macrocyclic units has been synthesised. Proton and metal binding properties of L2 have been studied in H2O/CH3CN (1:1 v/v) by potentiometric and spectrophotometric measurements and compared with those of the analogous and previously published bis-macrocyclic receptor featuring two [9]aneN(3) units (L1). Despite a thermodynamic selectivity observed for Zn2+ with both L1 and L2, L2 shows a marked sensing selectivity towards Cd2+ via a chelation enhancement of fluorescence (CHEF) effect both in H2O/CH3CN (1:1 v/v) and in H2O using silica core-PEG shell nanoparticles as vehiculant. On the other hand, L1 shows a selective optical sensing towards Zn2+ in agreement with the thermodynamic selectivity observed for the same metal ion. [GRAPHICS] .

引用

页码：912 / 921

页数：10

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