A selective colorimetric sensor for Cu2+ in aqueous solution

Small molecule sensors for the colorimetric detection of Copper(II): A review of the literature from 2010 to 2022

“…The sensors in this section did not report a respective LOD for Cu 2+ detection (Table 12) and were mostly employed as purely solvent-based sensors [136][137][138][139][140][141][142][143][144][145]. Nonetheless, some sensors were fixed to a test strip for Cu 2+ detection [146,147], used for fluorescence bioimaging of Cu 2+ in cells [148,149], demonstrated reversibility when exposed to EDTA [150,151] and achieved solubility in a fully aqueous solution [145,148].…”

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

“… 28 , 34 − 87 Some designs that have been explored include chemosensors based on rhodamine 44 , 53 , 56 , 57 , 60 , 78 and Schiff-base units. 28 , 37 , 45 , 48 , 51 , 54 , 61 , 62 , 70 , 71 , 76 , 77 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.…”

“…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...…”

Diaminomaleonitrile substituted pyrene as a solvent-dependent chemosensor for copper(II) ion and hypochlorite

“…Because of the increase of Cu 2+ in environmental and biological systems as pollutants, chemosensors for Cu 2+ have been greatly developed during the past decades [3][4][5]. Among these, fluorescence turn-on sensors for rapid detection of Cu 2+ have attracted more and more attentions [6][7][8][9][10][11][12][13][14]. Recently, Wu et al reported a pyrene-based fluorescent chemosensor, Py-DAMN-1, for Cu 2+ using diaminomaleonitrile as the chelator [15].…”