Polyethyleneimine-capped copper nanoclusters for detection and discrimination of 2,4,6-trinitrotoluene and 2,4,6-trinitrophenol

Abstract

The detection and discrimination of 2,4,6-trinitrotoluene (TNT) and 2,4,6-trinitrophenol (TNP) from analogues are of great importance to global security and are full of challenges in the field of trace sensing....

Synthesis of blue-emitting polyvinylpyrrolidone coated copper nanoclusters for sensitive detection of sodium dichloroisocyanurate and rosmarinic acid

“…However, the synthesized CuNCs with lower relative molecular weight of PVP also exhibited relatively low fluorescence intensity, possibly because smaller molecular weight might reduce the interaction between PVP and Cu, thus inhibiting the charge transfer of ligands to metals. Also, the solubility of PVP with higher molecular weight in water decreases, resulting the ligands cannot effectively attach to metal surface [31,32]. In conclusion, the optimal pH, type and dosage of PVP for the synthesis of PVP-CuNCs were 3.5, Mr = 58000 and 0.3448 mM, respectively.…”

Fluorescent metal nanoclusters: prospects for photoinduced electron transfer and energy harvesting

“…140 Both PET and FRET in CuNCs were carried out for the sensitive detection of 2,4,6-trinitrophenol (TNP) and 2,4,6-trinitrotolune (TNT) using the energy gap and spectral overlap, respectively. 106 The quenched PL due to FRET between CuNC and MnO 2 nanospheres could be revived with glutathione (GSH) and hence used as the mechanism for the detection of GSH in human whole blood samples. 141 Green emissive tryptophan-coated CuNCs showed excellent FRET with doxorubicin.…”

A novel fluorescent nanoprobe for sensitive detection of 6-thioguanine in human serum based on Cu/Ag nanoclusters

“…Metal nanoclusters, as an emerging class of uorescent nanomaterials, are generally composed of a few to dozens of metal atoms. 14 Copper, being an earth-abundant and low-cost metal, can be easily synthesized into copper nanoclusters (CuNCs) using various protection agents, such as proteins, 15,16 DNA, 17,18 thiols, 19,20 dendrimers 21,22 and organic small molecules. 23,24 Compared with other noble metals.…”