A uracil nitroso amine based colorimetric sensor for the detection of Cu²⁺ions from aqueous environment and its practical applications

Abstract

A simple uracil nitroso amine based colorimetric chemosensor (UNA-1) has been synthesized and screened for its cation recognition ability.

A Dual-Emission Amphiphile /Dye Modified Mesoporous Silica as Fluorescent Sensor for the Detection of Fe3+, Cr3+and Al3+

“…In order to solve these disadvantages, porous silica with dual‐emission is developed . In this system, two kinds of fluorescence probes are integrated in one material and form a ratiometric chemosensor that can reduce the analytical error . What is more, the detection is along with the change of fluorescence colors, which are conveniently perceived by eyes.…”

A turn-on fluorescent pyrene-based chemosensor for Cu(ii) with live cell application

“…9 Due to sensitivity issues, uorescent sensors with a turn-off process offer poor sensitivity for metal ion detection compared to uorescence enhancement sensors. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] This paper reports on a newly designed pyrene-based uorescence enhancement chemosensor for Cu 2+ that is based on photoinduced electron transfer (PET).…”

Highly Sensitive and Selective Spiropyran-Based Sensor for Copper(II) Quantification

“…For example, of the 55 sensors mentioned above, only 14 sensors displayed naked-eye detection below 10 μM. 34 , 42 , 44 , 50 , 53 , 57 , 61 , 65 , 66 , 69 , 70 , 72 , 76 , 87 Furthermore, only three of the studies challenged copper sensing in the presence of a competing metal ion 34 , 61 , 70 and none challenged copper sensing in the presence of 10-fold excess competing metal to copper, which is achieved in this work.…”

“…Small-molecule copper-ion sensors that produce optical signals are of great interest and we have identified 55 colorimetric and fluorescent copper sensors that have been reported in the literature in 2010. ,− Some designs that have been explored include chemosensors based on rhodamine ,,,,, and Schiff-base units. ,,,,,,,,,,, It is evident that while there have been many copper sensor designs, sensitivity and selectivity for naked-eye detection remain elusive. For example, of the 55 sensors mentioned above, only 14 sensors displayed naked-eye detection below 10 μM. ,,,,,,,,,,,,, Furthermore, only three of the studies challenged copper sensing in the presence of a competing metal ion ,, and none challenged copper sensing in the presence of 10-fold excess competing metal to copper, which is achieved in...…”