Facile Room Temperature Synthesis of Lanthanum Oxalate Nanorods and Their Interaction with Antioxidative Naphthalimide Derivative

Abstract

Polycrystalline lanthanum oxalate (LaOX) nanorods (NRs) were succesfully synthesized using reverse micellar (RM) method. The study espouses the versatility of the reverse micellar method forming monodisperse, stable nanorods at room temperature. The as-synthesized LaOX nanorods were characterised by different techniques. Result shows that the nanorods of LaOX with aspect ratio 10.2:1 have preferred growth direction of (020). The pure phase synthesis of the nanorods was confirmed from Fourier transformed infrared (FTIR) and X-ray diffraction (XRD) analysis. The thermo gravimetric analysis (TGA) and differential thermal analysis (DTA) of the as-synthesized nanorods were perfomed to observe their thermal degradation. Synthesized nanorods are fluorescent having emission maximum at 329 nm. Fluorescence resonance energy transfer (FRET) phenomenon has been observed between LaOX nanorods (energy donor) and naphthalimide (NAP) derivative (energy acceptor) and this mechanism can be helpful for sensing of NAP or NAP like molecules used as antioxidative in living systems.

Enhancing the Phosphate Adsorption of a Polyallylamine Resin in Alkaline Environments by Lanthanum Oxalate Modification

“…As we can see, La-oxalate exhibits a diffraction pattern consistent with the monoclinic La 2 (C 2 O 4 ) 3 ·10H 2 O (JCPDS 49-1255). 27 , 28 SH and SH-1C-0.6La are amorphous according to the XRD patterns, because no or low La loading is associated with these two samples. In contrast, SH-1C-1La and SH-2.5C-1La exhibit diffraction patterns that are similar to La-oxalate but with lower diffraction intensity.…”

Soft-Templated Room Temperature Fabrication of Nanoscale Lanthanum Phosphate: Synthesis, Photoluminescence, and Energy-Transfer Behavior

“…Bare La 3+ ions in AOT/ n -heptane RMs have λ abs at 295 nm and the corresponding emission is observed at 414 nm. Assuming the excited state of La 3+ arising from a P→d electron transition, we may say that there occurs a 1 S 0 → 1 D 2 transition in the La 3+ ions which is of lowest energy transition and is a Laporte-forbidden transition, 1 A 1g → 1 E g (A and E symbolize the singlet and doublet state of the excited-state energy levels of the La 3+ ion) which accounts for the low-intensity emission spectra of La 3+ ion. However, the change in absorption or emission property of La 3+ may be attributed to the different ionic environment.…”

“…On account of comprehensive utilization as superconductors, − magnets, , catalysts, , biological sensors, , cell labels, − drug carriers, , etc., demand for designing and fabrication of multifunctional, smart f-block rare earth (RE) nanostructures is still a competing field of research. Usually, the optical functionality is afforded by quantum dots (QDs), , fluorescent dyes, , and/or rare-earth-based materials; , however, the latter are being preferred owing to several intriguing aptitudes such as sharp emission bands, high photochemical stability, long luminescence lifetimes (≫10 –6 s), appreciably large Stokes shifts (≫10 –9 m), and lower toxicity …”

Polymer-fabricated synthesis of cerium oxide nanoparticles and applications as a green catalyst towards multicomponent transformation with size-dependent activity studies

“…The major advantage of the above-mentioned method lies in the fact that not only size but also surface morphology can be easily controlled by monitoring the value of ω (ω = [water]/[surfactant]) and the appropriate choice of a microemulsion template. 27 Moreover, it also provides a low-temperature path for synthesis in very moderate reaction conditions. The present work describes a synthetic route following a method employing a double microemulsion, which was prepared using a mixed surfactant of AOT (anionic) and L-α-phosphodicholine or lecithin (zwitterionic) in iso-octane.…”