Rhodamine B conjugate for rapid colorimetric and fluorimetric detection of aluminium and tin ions and its application in aqueous media

被引：33

作者：

Cheah, Poh Wei ^{[1
]}

Heng, Mok Piew ^{[1
]}

Izati, Amnor ^{[1
]}

Ng, Chew Hee ^{[2
]}

Tan, Kong Wai ^{[1
]}

机构：

[1] Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 50603, Malaysia

[2] Int Med Univ, Sch Pharm, Dept Pharmaceut Chem, Kuala Lumpur 57000, Malaysia

来源：

INORGANICA CHIMICA ACTA | 2020年 / 512卷

关键词：

Chemosensor; Rhodamine; Fluorescent probe; 'Naked-eye' detection; Selective detection; ON FLUORESCENT CHEMOSENSOR; STANNOUS FLUORIDE; SELECTIVE DETECTION; NANOMOLAR DETECTION; PROBE; SENSOR; HG2+; AL3+; FE3+; FE(III);

D O I：

10.1016/j.ica.2020.119901

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new fluorescent chemosensor (MEK) was synthesized from conjugation of rhodamine B hydrazide and methyl ethyl ketone. It exhibited features that would facilitate the 'naked-eye' detection, including excellent selectivity and high sensitivity towards Al3+ and Sn2+ ions. Stronger binding strength was recorded in the formation of sensor-Al3+ complex, where the binding constant (K-a) was 3.58 x 10(10) M-1. Detection limits of MEK for Sn2+ and Al3+ was 5.10 mu M and 8.96 mu M respectively. Moreover, a 1:2 and 1:1 binding stoichiometry between this sensor with Al3+ and Sn2+ was verified via Job's plot and ESI-MS. Reversibility of the sensor as metal ions detector was evaluated with the introduction of the common quencher EDTA and it showed that MEK can be used repeatedly up to 6 times. Differences in the fluorescence profiles of sensor and the sensor-metal complexes (Al3+ and Sn2+) suggested the possible applications of MEK as detection kit for these metal ions. Interestingly, the on-site assay study shown obvious colour changes and fluorescence, thereby reflecting a potentially useful way in differentiating Al3+ and Sn2+. The combination of significant fluorescence response along with tunable selectivity is therefore notably practical for the application of this sensor.

引用

页数：8

共 56 条

[51] Naphthalimide Modified Rhodamine Derivative: Ratiometric and Selective Fluorescent Sensor for Cu2+ Based on Two Different Approaches [J].