Synthesis, characterization, Density Functional Theory (DFT) calculation, and fluorescent study of an efficient and novel Schiff base Cu(II) sensor

IF 1.7 4区 化学 Q3 Chemistry Journal of Chemical Sciences Pub Date : 2022-08-22 DOI:10.1007/s12039-022-02083-9
Bhaswati Devi, Ankur Kanti Guha, Chandana Malakar, Arundhuti Devi
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引用次数: 2

Abstract

A Schiff base fluorescent “turn-off” sensor L based on 2, 4-diamino-6-hydroxypyrimidine, and 2-hydroxy-1-naphthaldehyde was synthesized, which shows excellent selectivity and sensitivity towards Cu2+ ions in an aqueous medium. The detection limit of the probe was found to be 11.92 µM which is much lower than the acceptable level of Cu2+ ions in drinking water as set by the World Health Organization (30 µM) and the U. S. Environmental Protection Agency (20 µM). Furthermore, a 1: 0.5 binding stoichiometry between the probe and Cu2+ ion was confirmed from the fluorescence titration data, Job’s plot, and DFT calculation. The binding constant (Ka) of Cu2+ ion with the probe was found to be 6.3 × 104 M−1. Thus, the overall study reveals that the synthesized Schiff base ligand is a potential fluorescent sensor for Cu2+ions.

Graphical abstract

The research study includes the synthesis of a novel and efficient Schiff base ligand L, which is highly sensitive and a selective fluorescent sensor for Cu2+ ions with a very low detection limit.

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一种高效新型希夫碱铜(II)传感器的合成、表征、密度泛函理论(DFT)计算和荧光研究
合成了一种基于2,4 -二氨基-6-羟基嘧啶和2-羟基-1-萘醛的希夫碱荧光“关断”传感器L,该传感器在水介质中对Cu2+离子具有优异的选择性和灵敏度。该探针的检出限为11.92µM,远远低于世界卫生组织(who)和美国环境保护署(epa)规定的饮用水中Cu2+离子标准(30µM)和20µM。此外,从荧光滴定数据、Job’s plot和DFT计算中,证实探针与Cu2+离子之间的结合化学计量为1:1 .5。Cu2+离子与探针的结合常数Ka为6.3 × 104 M−1。因此,整体研究表明,合成的希夫碱配体是Cu2+离子的潜在荧光传感器。摘要本研究包括合成一种新型高效的希夫碱配体L,该配体对Cu2+离子具有高灵敏度和极低检测限的选择性荧光传感器。
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来源期刊
Journal of Chemical Sciences
Journal of Chemical Sciences Chemistry-General Chemistry
CiteScore
2.90
自引率
5.90%
发文量
107
审稿时长
12 months
期刊介绍: Journal of Chemical Sciences is a monthly journal published by the Indian Academy of Sciences. It formed part of the original Proceedings of the Indian Academy of Sciences – Part A, started by the Nobel Laureate Prof C V Raman in 1934, that was split in 1978 into three separate journals. It was renamed as Journal of Chemical Sciences in 2004. The journal publishes original research articles and rapid communications, covering all areas of chemical sciences. A significant feature of the journal is its special issues, brought out from time to time, devoted to conference symposia/proceedings in frontier areas of the subject, held not only in India but also in other countries.
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