A pyrene-based simple but highly selective fluorescence sensor for Cu2+ ions via a static excimer mechanism

Abstract

A pyrene-based simple fluorosensor has been synthesized by a one step process. It exhibited high selectivity towards Cu(2+) ions via fluorescence enhancement of monomer and excimer emission. The origin of excimer formation was examined and established to be of static in nature from the study of absorption and excitation spectra. The observed monomer and excimer emission in the presence and absence of Cu(2+) ion with varying pH was studied and provided probable justification. The effect of varying portions of water content in solvent on the sensor molecule was also examined. The sensor found its proper application in finding accurate and trace amount of Cu(2+) ions present in drinking water samples from various sources. The detection limit of the current sensor was found to be 4 × 10(-8) M.

Copper(II)-directed static excimer formation of an anthracene-based highly selective fluorescent receptor

“…Excimer emissions are characteristically observed with a broad fluorescence band with the maxima at lower energy in comparison to monomer emissions, and this band can be taken into account to examine the molecular recognition process in more detail. [35][36][37][38] Although hostdirected intramolecular excimer formation in anthracenecontaining compounds as a result π-π interactions between the anthracene units is well documented, [39][40][41] there are a few examples which form intermolecular excimer species. 42,43 Considering such unique physical properties of anthracene, we have designed a simple but highly effective methyl anthracenylimine benzoate (MAB) derivative, which has the ability to form self-assembled anthracenyl excimer species with a specific metal ion.…”

Detection of Cu2+in Water Based on Histidine-Gold Labeled Multiwalled Carbon Nanotube Electrochemical Sensor

“…Due to the important roles of copper ions in industrial, environmental, and biological processes, it is on the main daily monitoring list of civil water all the time. So, there is a great demand for the development of simple, selective, and sensitive methods for copper ions [3]. Currently there are different methods that have been developed for the detection of copper ions [4–7].…”

One diethylamine coumarin derivative with nitro substituted chalcone structure as chemosensor for cyanide and copper ions

“…The investigation indicated that the compound exhibits quickly obvious UV-vis absorption, color change and fluorescence response to cyanide and copper ions in acetonitrile conditions. The bonding mechanism based on spectra change and in situ 1 H NMR suggested that cyanide is bonded to 4-position of coumarin and 1:2 complexation between compound and copper ion forms.For the past few years, due to the important roles in biological, industrial and environmental processes of cyanide and copper ions, the study of optical chemosensors for cyanide [1-10] and copper ions [11][12][13][14][15][16] has attracted more and more attention of many chemists. As we all know, cyanide is a highly toxic compound and the lethal to human is minimal [17].…”

“…For the past few years, due to the important roles in biological, industrial and environmental processes of cyanide and copper ions, the study of optical chemosensors for cyanide [1][2][3][4][5][6][7][8][9][10] and copper ions [11][12][13][14][15][16] has attracted more and more attention of many chemists. As we all know, cyanide is a highly toxic compound and the lethal to human is minimal [17].…”