7512-18-7Relevant articles and documents
Al3+ triggered aggregation induced emission of an anthracence based azine derivative in SDS medium
Chatterjee, Sudeshna,Das, Debasis,Ghosh, Milan,Khanra, Somnath,Mukherjee, Pallabi,Ta, Sabyasachi
, p. 8477 - 8485 (2020)
An anthracene based unsymmetrical azine derivative, viz. 4-(anthracen-9-ylmethylene-hydrazonomethyl)-2-methoxy-phenol (L5), is synthesized and structurally characterized by single crystal X-ray diffraction (SC-XRD) analysis. The photo-physical interaction of L5 with Al3+ in sodium dodecyl sulfate (SDS) is highly selective, allowing recognition of nanomolar (62.8 nM) Al3+ without interference from common cations. The Job plot shows a 1 : 1 (mole ratio) interaction with an associated binding constant of 9.14 × 104 M-1. The "turn ON" fluorescence is attributed to aggregation induced emission (AIE). The Al3+ assisted particle size enhancement of L5 from 52.70 nm to 3413.06 nm (3.413 μM) observed through DLS studies corroborates the AIE mechanism. FESEM images also support the proposed mechanism. The cylindrical morphology of L5 changes to a cube shape due to aggregation of the [Al3+ + L5] adduct. Fluorescence lifetime decay (TCSPC) data indicate that the radiative decay of L5 is enhanced about ten times in the presence of Al3+. The average lifetime of L5 in the absence and presence of Al3+ is 0.98 ns and 1.45 respectively. In the presence of Na2EDTA, the emission intensity of the [L5 + Al3+] system is significantly quenched due to chelation of Al3+ by EDTA. TDDFT studies indicate higher stability of the [L5 + Al3+] adduct over free L5.
Organosilanes and their magnetic nanoparticles as naked eye red emissive sensors for Ag+ions and potent anti-oxidants
Singh, Gurjaspreet,Diksha,Singh, Akshpreet,Satija, Pinky,Pawan,Mohit,González-Silvera,Espinosa-Ruíz, Cristóbal,Esteban, María Angeles
, p. 5517 - 5525 (2021/04/06)
The present article reports the synthesis and structural characterization of a triazole appended isatin linked silane-based sensor using a highly efficient click chemistry approach. The yellow-coloured solution of the highly selective chemosensor turned red in the presence of Ag+ions and a red shift in the absorption spectra was also observed during the addition of these ions. IR spectroscopic studies support the metal ion binding with organosilanes in the cavity created by the carbonyl group of isatin, the nitrogen atom of the triazole ring and the Si-O bond of silane. Furthermore, the sensing application was enhanced by the immobilization of the ligand on the surface of iron oxide silica nanoparticles and the resulting silica surfaced nanocomposites were characterized using various techniques. B-H plots and calibration curves were employed to measure the association constants and limits of detection, respectively, of the synthesized ligands and their magnetic nanoparticles. The nanohybrids demonstrate a greater binding potential to Ag+ions. In addition, the synthesized organosilanes were investigated for cytotoxicity using the MTT assay, and the antioxidant activity was measured by decolouration of ABTS˙+
POLYMERIZABLE COMPOUND AND OPTICAL ISOMER
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Paragraph 0200, (2018/04/02)
The present invention provides a polymerizable compound having high storage stability without causing crystal precipitation when added to a polymerizable composition. The present invention also provides a polymerizable composition containing the compound. When the filmy polymer produced through polymerization of the polymerizable composition is irradiated with UV light, it hardly discolors or peels from substrate. Further, the present invention provides a polymer produced through polymerization of the polymerizable composition and an optically anisotropic body using the polymer.