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

被引：0
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作者：
Diganta Kumar Das
Bidisha Bharali
Swrangsi Goyari
机构：
[1] Gauhati University,Department of Chemistry
来源：
Journal of Fluorescence | 2018年 / 28卷
关键词：
Cerium(III); 4-methoxybenzaldehyde; Fluorescence; Sensor; Protonation/deprotonation;
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学科分类号：
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 λmax = 360 nm when excited with 270 nm 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 104.8 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：4
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