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An Aza‐12‐crown‐4 Ether‐Substituted Naphthalene Diimide Chemosensor for the Detection of Lithium Ion
Author(s) -
Hangarge Rahul V.,
La Duong Duc,
Boguslavsky Miron,
Jones Lathe A.,
Kim Yong Shin,
Bhosale Sheshanath V.
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702085
Subject(s) - crown ether , chemistry , fluorophore , diimide , moiety , fluorescence , detection limit , ether , naphthalene , photochemistry , naked eye , ionophore , lithium (medication) , ion , molecule , organic chemistry , perylene , chromatography , medicine , physics , quantum mechanics , endocrinology , calcium
We synthesised aza‐12‐crown‐4 ether‐substituted naphthalene diimide (NDI‐12‐C‐4) and demonstrated its properties as an fluorescent and colorimetric sensor. The NDI‐12‐C‐4 uses the aza‐12‐crown‐4 moiety to bind Li + ion selectively over larger monovalent cation such as Cs + , Na + and K + . The sensor is chemically stable due to the crown‐ether, and the appended NDI fluorophore allows leads to optical changes exclusively for the monovalent Li + ion. UV–vis absorption, fluorescence, cyclic voltammetry (CV), 1H NMR and naked eye‐detection clearly demonstrate selective, sensitive binding of Li + ion with a detection limit of 5.0 μM. Importantly, reversible binding of Li + by NDI‐12‐C‐4 was also observed upon addition of EDTA, after which the sensor could be recovered via simple centrifugation, indicating suitability for use in a biological sensor device.