Publications by authors named "S Vijaya Laxmi"
Objectives: The study aimed to evaluate the relationship between maxillary sinus volume and various sinonasal anatomical variants, as detected by multi-detector computed tomography, and their associations with chronic rhinosinusitis (CRS).
Material And Methods: A case-control study was conducted with 103 patients presenting with chronic sinonasal symptoms (cases) and 50 asymptomatic individuals (controls). A 128-slice computed tomography scanner was used to measure maxillary sinus volume and assess anatomical variants, such as a deviated nasal septum (DNS), concha bullosa (CB), and agger nasi cells.
Although the reactivity of five-coordinate end-on superoxocopper(II) complexes, Cu(η-O), is dominated by hydrogen atom transfer, the majority of four-coordinate Cu(η-O) complexes published thus far display nucleophilic reactivity. To investigate the origin of this difference, we have developed a four-coordinate end-on superoxocopper(II) complex supported by a sterically encumbered bis(2-pyridylmethyl)amine ligand, dpb-BPA (), and compared its substrate reactivity with that of a five-coordinate end-on superoxocopper(II) complex ligated by a similarly substituted tris(2-pyridylmethyl)amine, dpb-TMPA (). Kinetic isotope effect (KIE) measurements and correlation of second-order rate constants ('s) versus oxidation potentials () for a range of phenols indicates that the complex [Cu(η-O)()] reacts with phenols via a similar hydrogen atom transfer (HAT) mechanism to [Cu(η-O)()].
View Article and Find Full Text PDFArticle Synopsis
- The study details the preparation of corannulene, a curved polycyclic aromatic hydrocarbon, using mechanochemical synthesis, achieving significant yields.
- Initially, a mixer mill is used for small-scale synthesis, while planetary mills are effective for larger productions, yielding up to 15 g per milling cycle.
- A total of 98 g of corannulene is produced, demonstrating the promising application of mechanochemistry for synthesizing complex nanocarbons like fullerenes and carbon nanotubes.
Article Synopsis
- Mixed-dimensional perovskites with bulky organic cations show potential for stable and efficient solar cells, but their performance is not well-understood due to gaps in knowledge about structure and degradation.
- A study systematically explores the effects of different bulky organic cations on the crystallography and optoelectronic properties of low-dimensional perovskites, finding that not all cations improve performance equally.
- The research reveals that materials with less structural distortion lead to better photoluminescence and thermal stability, suggesting the need for careful design of organic cations for enhanced perovskite solar cells.