Condensation Product of 4-Methoxybenzaldehyde and Ethylenediamine: "Off-On" Fluorescent Sensor for Cerium(III)

被引：4
|
作者：
Das, Diganta Kumar [1 ]
Bharali, Bidisha [1 ]
Goyari, Swrangsi [1 ]
机构：
[1] Gauhati Univ, Dept Chem, Gauhati 781014, Assam, India
来源：
JOURNAL OF FLUORESCENCE | 2018年 / 28卷 / 06期
关键词：
Cerium(III); 4-methoxybenzaldehyde; Fluorescence; Sensor; Protonation; deprotonation; ION; AL3+; THORIUM; CE(III);
D O I：
10.1007/s10895-018-2298-0
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
The condensation product (L) of 4-methoxybenzaldehyde and ethylenediamine has been synthesised and characterised. L showed a 21 times enhancement in fluorescence intensity on interaction with Ce3+ in CH3OH at (max)=360nm when excited with 270nm photons. Metal ions K+, Na+, Al3+, Co2+, Hg2+, Cd2+, Ni2+, Zn2+, Mn2+, Mg2+ and Ca2+ do not interfere. The stoichiometry of binding and the binding constants were determined from spectroscopic data and found to be 1:1 and 10(4.8) M respectively. The detection limit was found to be 10(-5.2) M. The protonation/de-protonation of water molecules coordinated to Ce3+ was found to show interesting behaviour on the fluorescence of L:Ce3+.
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页码：1357 / 1361
页数：5
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