Colorimetric and fluorescence sensing of fluoride anions with potential salicylaldimine based schiff base receptors

Cell permeable fluorescent colorimetric Schiff base chemoreceptor for detecting F− in aqueous solvent

“…S5, Supporting information). The band at 300 nm can be assigned to п-п* and the band at 330nm to n-п* transition of the п electron localized on azomethine group (C=N) [47][48][49]. With gradual addition of F - (Fig.…”

A simple triazole-based “turn on” fluorescent sensor for Al3+ ion in MeCN–H2O and F− ion in MeCN

“…The anion-sensing properties of NTA were examined in the presence of 100-fold excess of various anions in MeCN at room temperature because the receptors with the imine and phenol groups sometimes showed the sensing properties of anions [31,32]. The results showed that NTA has the specific sensing ability to fluoride through fluorescence in MeCN.…”

Substituent effects on anion sensing of salicylidene Schiff base derivatives: Tuning sensitivity and selectivity

“…A variety of colorimetric sensors containing a number of different types of anion binding group have been designed and tested for anion recognition and sensing over the past years [5][6][7][8][9][10][11]. Most of these sensors are developed based on hydrogen bonding interaction [12][13][14], deprotonation [15][16][17] or chemical reaction [18][19][20]. However, many anion sensors are not able to differentiate F À , AcO À and H 2 PO 4 À because of their similar basicity and surface charge density [21,22].…”

“…However, it is not sufficient to engage in the act of solving the problem of differentiating F À , AcO À , and H 2 PO 4 À [27]. In the literature, several studies have shown that the substituents have a great impact on the selectivity and sensitivity of anion sensors [12,28]. Therefore, changing substituting group of sensors should be an effective way to solve this problem.…”