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
收藏
页码：912 / 921
页数：10
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