Zn(II)-dicarboxylato-terpyridyl coordination polymer - A ‘Turn on’ fluorogenic platform for Al3+ sensing in aqueous medium and life cell imaging

pH-Stable Zn(II) Coordination Polymer as a Multiresponsive Turn-On and Turn-Off Fluorescent Sensor for Aqueous Medium Detection of Al(III) and Cr(VI) Oxo-Anions

“…The occurrence of such insertion of Al 3+ in the π-cavity improved the structural rigidity of IITKGP-70 via restricting the intramolecular vibration and rotation, which, in turn, reduced the occurrence of nonradiative transition processes, thus resulting in emitting higher fluorescence intensity than that of the pristine framework. 47,69 The average lifetime of IITKGP-70 upon the addition of Al 3+ ions did not show any obvious variations, indicating a static quenching process, which is in agreement with the weak interactions of the analyte with the framework in the ground state (Figure S23a,b, Supporting Information). 70 , along with other anionic analytes, were recorded in an aqueous medium and plotted against the emission of fluorophore IITKGP-70.…”

“…However, the plausible mechanism for the fluorescent enhancement could be as a result of the encapsulation of Al 3+ ions in the interlayer space generated by π···π interactions between the pyridyl moieties of the DPA spacer ( d π···π = 3.653–3.779 Å), having the small ionic radius of Al 3+ ( r Al3+ = 0.675 Å). The occurrence of such insertion of Al 3+ in the π-cavity improved the structural rigidity of IITKGP-70 via restricting the intramolecular vibration and rotation, which, in turn, reduced the occurrence of nonradiative transition processes, thus resulting in emitting higher fluorescence intensity than that of the pristine framework. , The average lifetime of IITKGP-70 upon the addition of Al 3+ ions did not show any obvious variations, indicating a static quenching process, which is in agreement with the weak interactions of the analyte with the framework in the ground state (Figure S23a,b, Supporting Information) . Furthermore, the UV–vis absorption spectra of Cr 2 O 7 2– and CrO 4 2– , along with other anionic analytes, were recorded in an aqueous medium and plotted against the emission of fluorophore IITKGP-70 .…”

Organosilane based magnetic silica nanoparticles for the detection of Al(iii) ions and construction of a molecular logic gate

“…21 As is well known, Al( iii ) is the third most abundant metal ion in the earth's crust (∼8.3% by weight) and is widely used in fabrics, medicine, papermaking, food additives, cookware and wrapping paper. 22–24 However, an increased level of Al( iii ) in the brain can result in conditions like Parkinson's disease, osmotic encephalopathy and Alzheimer's disease. 25–27 According to WHO standards, the daily consumption of Al( iii ) ions should be less than 3–10 mg, and the maximum Al( iii ) concentration in drinking water should not exceed 7.41 μM.…”

“…ware and wrapping paper. [22][23][24] However, an increased level of Al(III) in the brain can result in conditions like Parkinson's disease, osmotic encephalopathy and Alzheimer's disease. [25][26][27] According to WHO standards, the daily consumption of Al(III) ions should be less than 3-10 mg, and the maximum Al(III) concentration in drinking water should not exceed 7.41 mM.…”