Key Considerations for Sensing Fe^II and Fe^III in Aqueous Media

Abstract

Recently Ghosh et al. reported on the fluorescent response of commercially available N‐(2‐aminoethyl)naphthalen‐1‐amine toward FeII, FeIII, and HgII (K. Ghosh, S. Rathi, P. Gupta, P. Vashisth, V. Pruthi, Eur. J. Inorg. Chem. 2015, ). The authors conclude that metal binding to the diamine chelator leads to chelation‐induced quenching; however, the experimental protocols are incompatible with the aqueous chemistry of FeIII, which precludes this interpretation of the data.

Theoretical study of the photophysical processes of a styryl‐bodipy derivative eliciting an AND molecular logic gate response

“…[1][2][3][4][5][6][7][8] In most cases, these changes could then be signaled by changes in the absorption or emission intensity and/or in the wavelength, and can be related to the operation of logic gates, via the familiar Boolean logic, [9] where the modulators correspond to the inputs and the observed changes correspond to the outputs. [8][9][10][11][12][13][14] The field of molecular logical gates (MLG) is a subject of research in many laboratories worldwide, [5,[15][16][17][18][19][20][21][22][23][24][25][26] and while a great deal of the groundwork has been accomplished, [15] the field is still at an early stage in terms of practical applications. [5,[15][16][17][18][19][20][21][22][23][24][25][26] However, a significant rise of information processing molecular devices is expected in the forthcoming years.…”

“…[8][9][10][11][12][13][14] The field of molecular logical gates (MLG) is a subject of research in many laboratories worldwide, [5,[15][16][17][18][19][20][21][22][23][24][25][26] and while a great deal of the groundwork has been accomplished, [15] the field is still at an early stage in terms of practical applications. [5,[15][16][17][18][19][20][21][22][23][24][25][26] However, a significant rise of information processing molecular devices is expected in the forthcoming years. [15] Theoretical studies aiming to provide experimentalists with information regarding a potential MLG candidate or to gain insight into experimental findings can play a significant role in the field of MLG.…”

Redox‐Enabled, pH‐Disabled Pyrazoline–Ferrocene INHIBIT Logic Gates

“…[12] Furthermore, it is commonly taken for granted that in water Fe 3 + hydrolyses to insoluble Fe(OH) 3 above pH 4. [13] With an understanding of these issues, [10] the applicability of pE-pH logic gates in an applied setting is ar eal possibility.F or example, the detection of Fe 3 + under acidic conditions by fluorescencec ould become ar outine method for the early detection of corrosion of ferrous alloys such as steel. [14] Wu and colleagues have demonstrated an oteworthy logic gate responsive to pH andr edox chemistry.…”

The solvent effect on a styryl‐bodipy derivative functioning as an AND molecular logic gate

“…As a result, in response to these modulations, molecules can exhibit differences in their ground or excited electronic states, with accompanying modifications in the absorption and/or emission intensity and wavelength. Such changes can be related to the operation of fluorescence chemosensors, molecular switches, and logic gates (via the familiar Boolean logic where the modulators correspond to the inputs and the observed changes correspond to the outputs) . As a consequence, the field of molecular logic gates and generally of chemosensors and molecular switches is very active and many research groups around the world work on these subjects …”

“…In the present work, we are going to expand our work on the styryl‐bodipy derivative in order to provide experimentalists with further information regarding this MLG candidate because: (a) In the literature, there are reports of fluorescent switching resulting from the presence of trace water, which can coordinate with metal ions and the azacrown ether becomes protonated rather than complexing with the metal ion . The fact that 1 has three receptors that are all protonable brings up this concern.…”