Design of an efficient uranyl ion optical sensor based on 1′-2,2′-(1,2-phenylene)bis(ethene-2,1-diyl)dinaphthalen-2-ol

Molecular Structure of the Surface-Immobilized Super Uranyl Binding Protein

“…Therefore, it is necessary to develop simple methods with excellent sensitivity and specificity to detect and harvest uranyl ions. Various analytical methods have been used to detect uranyl ions, including optical spectroscopy (e.g., fluorescence spectroscopy, 11 spectrophotometry, 12 optode, 13 and Raman spectroscopy 14,15 ), mass spectrometry, 16 separation methods, 17 and electrochemical analysis. 18−20 Recently, various methods using biological molecules to detect uranyl ions have also been developed.…”

“…Therefore, it is necessary to develop simple methods with excellent sensitivity and specificity to detect and harvest uranyl ions. Various analytical methods have been used to detect uranyl ions, including optical spectroscopy (e.g., fluorescence spectroscopy, spectrophotometry, optode, and Raman spectroscopy , ), mass spectrometry, separation methods, and electrochemical analysis. − Recently, various methods using biological molecules to detect uranyl ions have also been developed. , Zhou et al previously reported an α-helical peptide, called super uranyl binding protein or SUP, that binds UO 2 2+ with femtomolar affinity and remarkable selectivity, better than 10,000-fold affinity over other common metal ions. The X-ray structure of this peptide was determined with both UO 2 2+ absent (PDB ID: 4FZO) and bound (PDB ID: 4FZP) and revealed that the SUP conformation changes only slightly in response to UO 2 2+ -binding.…”

Highly selective and sensitive fluorescence optode membrane for uranyl ion based on 5-(9-anthracenylmethyl)-5-aza-2,8-dithia[9],(2,9)-1,10-phenanthrolinophane

“…In Table 6, the main analytical characteristics (i.e., response time, dynamic range, pH and detection limit) of the proposed uorescent sensor were compared with the recent reported uranyl optodes. 14,[53][54][55][56][57][58][59] As it can be seen from the data summarized in Table 4, the proposed sensor is signicantly improved compared to the previously reported uranyl sensors in terms of response time, dynamic range and detection limit. Moreover, due to its highly selective behavior, the proposed uorescence sensor is applicable to the accurate determination of the uranyl ion in real samples of complex matrices, as shown in the section of analytical applications.…”

Design of an optically stable pH sensor based on immobilization of Giemsa on triacetylcellulose membrane

“…The response time of the present optode is controlled by the time required for the analyte to diffuse from the bulk of the solution to the membrane interface and to associate with the indicator [15][16][17][18][19]. Response time of the optical sensor was determined using absorption data at 711 nm and obtained results are shown in Fig.…”

“…A pH optical sensor is based on pH dependent change of the absorbance or luminescence of certain indicator molecules immobilized on/in certain solids [8][9][10][11]. The development of optical pH sensors can provide an accessible and rapid method for routine environmental measurements [12][13][14][15][16][17].…”