D.A.V. College, Koraput, is a State Government-run degree college affiliated to the Berhampur University. It is situated in Landiguda 6 km from Koraput Bus-stop. It offers graduate courses in Arts, Commerce and Science stream. It also offers Master courses for Arts stream in two subjects that is Oriya and Education.The College was established in 1968 by the Dayanand Anglo-Vedic College Management Committee in collaboration with the Education Development Society of Koraput. It was taken over by the Government of Orissa in 1982, expanded to offer bachelor's and master's degrees. Govt of Odisha, Department of Higher education on 6-12-2012 notified in an extra ordinary Gazette Publication issue that the DAV college is renamed as "Government college, Koraput (with effect from 10-07-1982 )..
Covalent organic frameworks (COFs) have attained great attraction from researchers in recent years due to their diverse applications arising from tunable porosity, excellent chemical stability and it-conjugated networks. Imine-linked COFs are typically prepared through Schiff-base condensation reactions, which often involve acidic conditions, high temperatures, low-pressure environments and prolonged reaction times. In this study, we report the catalytic synthesis of an imine-linked COF under mild conditions and reduced reaction time, which functions as a promising fluorescent sensor for the sensitive and selective detection of hazardous organic pollutants in aqueous environments. COF was successfully synthesized via a Schiff-base condensation reaction between 1,3,5-tris(4-aminophenyl) triazine and terephthaldehyde using lead (II) chloride as a Lewis acid catalyst, achieving framework formation within 24 h. The resulting COF exhibited high crystallinity and a well-ordered porous structure, as confirmed by FTIR spectroscopy, powder X-ray diffraction, high-resolution transmission electron microscopy and Brunauer-Emmett-Teller surface area analysis. The synthesized COF exhibited excellent selectivity and sensitivity towards the detection ofp-nitrophenol (PNP) in water, achieving a low detection limit of 2.778 mu M. The fluorescence quenching behavior was attributed to a photoinduced electron transfer (PET) mechanism. Furthermore, the practical applicability of the sensor was also evaluated for different environmental water samples. This work highlights the role of an imine-linked Covalent Organic Framework as an efficient fluorescence-based sensor for monitoring environmental pollutants.
In this study, an azomethine-bridged heteroaryl silane compound (CSB) was synthesized and comprehensively characterized using various spectroscopic techniques. Photophysical studies showed CSB's high selectivity for Cd (II), with an LOD of 33 nM, further enhanced to 3 nM after immobilization on silica-coated magnetic nanoparticles. The successful functionalization of CSB onto the magnetic nanoparticles was confirmed by FT-IR spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Vibrating sample magnetometer (VSM), and powdered X-ray diffraction (XRD), indicating effective surface modification and elemental composition consistent with CSB attachment. Job's plot analysis indicated a 1:1 stoichiometric binding ratio between Cd(II) and the CSB ligand, and the corresponding metal complex was synthesized accordingly. The successful coordination of Cd(II) with CSB was confirmed via FT-IR, ESI-MS, and UV-Vis spectroscopy. Antibacterial activity assessment of CSB and CSB-NP against Pseudomonas aeruginosa, Bacillus subtilis, Escherichia coli, and Staphylococcus aureus, revealing potent inhibitory effects. These results suggest that CSB and its magnetic nanocomposites hold significant potential for environmental monitoring of toxic Cd(II) and for therapeutic applications in combating bacterial infections.
The review highlights the advances of coordination chemistry in the domain of homo and heteronuclear metal-organic architectures derived from compartmental ligands (CLs). It summarizes key developments reported up to 2024, focusing on the synthetic strategies and the structural characteristics of coordination complexes and frameworks derived from Schiff base CLs. Particular attention is given to how factors such as compartment size, flexible arms, skeletal length, and auxiliary ligands influence the assembly of molecular structures. The review also briefly discusses the suitability of CL-derived multinuclear homo- and heteronuclear complexes for various applications, highlighting their relevance to areas such as single-molecule magnets, catalysis, and materials. Overall, this report offers valuable insights into the design of new ligating frameworks aimed at exploiting the synergistic behaviour of multiple metal centers confined within well-defined compartments.
In this study, Pr0.7Ba0.3MnO3 (PBMO) and its composite were synthesized and thoroughly tested for microwave absorption performance in the X-band (8.2–12.4 GHz). The compositions, P1 (PBMO), P2 (PBMO + 2wt
Luminescent metal-organic frameworks (LMOFs) are gaining significant attention for their enhanced fluorescent properties and potential in sensing applications. The mixed-ligand approach, which combines different N, N'donor and polycarboxylate ligands, has been widely employed for the synthesis of MOFs, significantly enhancing their fluorescent properties. This review focuses on the use of mixed-ligand MOFs for fluorescent sensing, particularly targeting heavy metals, nitro-aromatics, and organic molecules. The first section discusses the mechanisms of fluorescence sensing that guide the design and preparation of MOFs tailored for specific analytes. The second section compiles literature on the use of transition and lanthanide metal-based luminescent mixedligand MOFs as fluorescent sensors for detecting heavy metal ions (e.g., Fe3+, Al3+, Cr3+, Hg2+, Pd2+, Cu2+), anions (e.g., CrO42-, Cr2O72-), nitro-aromatics (e.g., nitrobenzene, nitrophenol, trinitrophenol (TNP)), and organic molecules (e.g., uric acid, ascorbic acid, picric acid). By consolidating this information, the review highlights the progress and potential of mixed-ligand MOFs in fluorescent sensing, paving the way for future research and development.
