Experimental and theoretical approach of photophysical properties of lanthanum(III) and erbium(III) complexes of tris(methoxymethyl)-5-oxine podant

pH dependent photophysical studies of new europium and terbium complexes of tripodal ligand: Experimental and semiempirical approach

“…All measurements were carried out at 25.0 70.2°C. The apparatus used, experimental details, calibration of the electrode, and titration procedures are followed as described earlier [33,34].…”

“…The formation of luminescent metal-TAME5OX complexes were ascertained by luminescence titrations of stiochiometric 1:1 quantities of TAME5OX and Ln (Ln ¼Eu 3 þ , Tb 3 þ ) in aqueous medium. The formation constants from the spectral data were calculated by using a non-linear least-square fitting program, HYPSPEC [36] and quantum yields were determined using an absolute method and the previously described procedure [33].…”

“…The theoretical electronic spectra of each species matches with experimental observed spectra, suggest the authencity of the modeled structures of protonated, neutral or hydroxy species. To best of our knowledge no neutral lanthanide complexes (ML) of tripodal chelator based on 8-hydroxyquinoline has been reported so far, except two recent reports [33,34]. For occupancy of the same number of coordination sites of three bidentate oxine units of the TAME5OX, the log β (or log K) of M(TAME5OX) can be compared with β 3 of M(Ox) 3 complex.…”

“…Keeping the above facts in view and in continuation to earlier work on tris(methoxymethyl)-5-oxine [33,34], a systematic study has been undertaken on the interactions of Eu 3 þ and Tb 3 þ ions with the recently developed encapsulating polydentate tripodal ligand TAME5OX (Fig. 2) based on 8-hydroxyquinoline, employing potentiometric, spectrophotometric titration techniques and theoretical studies.…”

Thiosemicarbazide chemical functionalized carbon dots as a fluorescent nanosensor for sensing Cu2+and intracellular imaging

“…1 A lot of redox reactions are dependent on copper enzyme catalysis in cytoplasm and mitochondria. [4][5][6][7][8] In addition, they are extremely detrimental to living organisms for example algae, bacteria, fungi and viruses. At the same time, many serious neurological diseases, such as Alzheimer's, Parkinson's disease and Wilson disease are totally caused by copper metabolic abnormalities in the human body.…”