The college was founded on August 3, 1959, by the Sanatan Dharma Maha Sabha, Delhi. Late Shri Atma Ram Chadha, a philanthropist, took over as chairman of the college governing body in 1967. The current chairman of the college is Prof. Renu Deswal.
Abstract This work studies the effect of anti-solvent engineering on the geometrical, electrical, optical, and ionic properties of lead-free halide perovskite Cs 2 AgBiBr 6 , targeting optoelectronic applications. Three anti-solvents, ethanol, Ethyl methyl ketone (EMK), and a 1:1 mixture of ethanol and EMK were used to recrystallise Cs 2 AgBiBr 6 colloidal particles via a reprecipitation method. Structural analysis through XRD confirms the formation of cubic phase of Cs 2 AgBiBr 6 in all antisolvents without impurity. UV-Vis spectroscopy showed absorption edges shifting with anti-solvents, reflecting bandgap tuning. Elemental analysis by XPS confirmed stoichiometric composition, FTIR and Raman studies verified structural integrity. Conductivity analysis displayed that EMK-treated Cs 2 AgBiBr 6 exhibits high conductivity and offers high activation energy for ion migration compared to ethanol and mixed antisolvent. Impedance spectroscopy showed that the sample recrystallised in the EMK solvent exhibits lowest bulk resistance compared to the other antisolvents, indicating more efficient charge carrier transport. Overall, the EMK anti-solvent system demonstrated the most balanced improvement in optical and electrical properties. We have also explored optoelectronic properties for EMK crystalized Cs 2 AgBiBr 6 by density functional theory (DFT). These experimental and theoretical findings highlight the crucial role of the solvent environment in tailoring the properties of Cs 2 AgBiBr 6 , rendering them promising candidates for eco-friendly, optoelectronic applications.
Pyrazolopyrimidines combine the structural and electronic properties of both pyrazole and pyrimidine, imparting unique characteristics that make them valuable in medicinal chemistry and drug discovery. We successfully developed an atom economic protocol for the synthesis of a series of pyrazolo-fused pyrimidines by employing various ynones and 3-aminopyrazole using K2CO3 as a base in ethanol. The reactions proceeded under milder conditions, furnishing the desired products in moderate to excellent yields.
In this paper we introduce the concept of a prime radical of an ideal of an L-ring L(mu,R) . Among various results pertaining to this concept, we prove here that prime radicals of an ideal eta, its radical , its semiprime radical S(eta) and its prime radical P(eta) , all coincide. Also we prove that for a primary ideal, its prime radical coincide with its radical. Moreover, we introduce the concept of primary decomposition and reduced primary decomposition of an ideal in an L-ring. We obtain a necessary and sufficient conditions for an ideal of an L-ring to have a primary decomposition. Some more results pertaining to the decomposition of an ideal are established.
ABSTRACT A sensitive analytical procedure for simultaneous extraction and determination of bisphenol A and alkyl phenols, namely, 4‐ sec ‐butylphenol, 4‐ tert ‐butylphenol, and 4‐ tert ‐amylphenol from aqueous samples with metal–organic framework (MOF)‐based dispersive micro‐solid‐phase extraction (D‐µSPE) and high‐performance liquid chromatography (HPLC) technique is developed. Sample contaminants were preconcentrated with amino‐functionalized aluminum MOF and later eluted with acetonitrile. The reconstituted sample was subjected to HPLC analysis. Various procedural parameters related to D‐µSPE were optimized. Under optimized preconcentration and chromatographic conditions, calibration curves with excellent linearity ( R 2 > 0.9986) in the working range of 0.25–100 ng mL −1 were prepared. Limit of detection (S/N = 3) for every analyte within the range of 0.020–0.022 ng mL −1 was obtained. Analyte's recovery 91.16%–97.01% (RSD = 1.02–3.01) for intraday and 89.86%–95.83% (RSD = 1.15–3.13) for inter‐day analysis was obtained from real water samples.
Mn(II) and Cu(II) complexes having the formula [M(L)(2)]X-2 of ligand, i. e., 2-acetyl-5-methylfuranthiosemicarbazone were synthesized. Various analytical and spectroscopic techniques described the structure of synthesized complexes. Molar conductance confirmed the electrolytic nature of the complexes. The theoretical study of the complexes explained the structural property and reactivity. The chemical reactivity, interaction and stability of the ligand and metal complexes were studied with the help of global reactivity descriptors. MEP analysis was used to investigate the charge transfer in the ligand. The biological potency was evaluated against two bacteria and two fungi. Complexes demonstrated superior inhibitory action to ligand. The inhibitory effect was also checked at the atomic scale using molecular docking, which confirmed the experimental results. Cu(II) complex was shown to have the most inhibitory effect in experimental and theoretical studies. To check the bioavailability and drug-likeness, ADME analysis was also done.
