The University of Madras (informally known as Madras University) is a public state university in Chennai, Tamil Nadu, India. Established in 1857, it is one of the oldest and among the most prestigious universities in India, incorporated by an Act of Legislative Council of India under the British government.It is a collegiate research university and has six campuses in the city: Chepauk, Marina, Guindy, Taramani, Maduravoyal and Chetpet. It offers more than 230 courses under 87 academic departments of post-graduate teaching and research grouped under 18 schools, covering diverse areas such as sciences, social sciences, humanities, management and medicine along with 121 affiliated colleges and 53 approved research institutions. The university houses the national centres for advanced research in nanotechnology, photonics and neurotoxicity. Besides, having three Centres of Advanced Study (CAS) in biophysics, botany and mathematics.University of Madras is the alma mater of five Presidents of India, including A. P. J. Abdul Kalam, two Indian Physics Nobel Laureates, CV Raman and Subrahmanyan Chandrasekhar, several notable mathematicians including Srinivasa Ramanujan, Abel Prize winner S. R. Srinivasa Varadhan and Turing Award winner Raj Reddy among others.The National Assessment and Accreditation Council has conferred 'five star' accreditation to the university in the first cycle, and subsequently with its highest 'A' grade. The University of Madras has been given the status of 'University with Potential for Excellence (UPE)' by the University Grants Commission. Madras University is also recognized among the 18 universities in India having the 'Centre with Potential for Excellence in Particular Area (CPEPA)' with a focus on drug development and climate change. R. R. R.
Riding the wave of energy storage advancements, ternary nanocomposites have evolved as a dynamic and versatile group of electrode candidates, offering immense promise for next-generation applications across the world. This research work investigates a simple hydrothermal synthesis of V2O5/TiO2/SnO2 ternary nanocomposites for supercapacitor applications. The prepared samples were employed for various characterization techniques like PXRD, HR-SEM, HR-TEM, XPS, and BET analyses collectively confirmed the successful formation and phase purity of the SVT ternary composite. Structural results validated the phase structure, while morphological examinations revealed a well-defined nanostructure with uniform distribution of the active components. The composite exhibited interconnected porous architecture, promoting efficient ion diffusion and charge transport. Furthermore, the Brunauer-Emmett-Teller analysis demonstrated a high SSA of 250.14 m2 g- 1 revealing its potential for enhanced electrochemical behavior. Moreover, the charge-storage evaluations highlight that the SVT ternary composite delivered a superior capacitance value of 892 F g- 1 at a current density of 1 A g- 1, alongside the material showed outstanding cycling durability, with a capacitance retention of 93.8 % even after 5000 continuous charge-discharge cycles. Hence, this research affirm that the SVT ternary nanocomposite proves to be a reliable and potent electrode material for supercapacitor applications.
We fabricated a nanostructured thin film electrode composed of graphene oxide-supported, metal-doped oxide, incorporating conducting transition metals oxides of Mn-Cu-Co mixed oxides. The resulting GO-supported Mn/Cu-Co3O4 composite exhibits potential for energy storage applications utilizes the cost-effective, and suited preparative methodology, offering a promising platform for high-performance supercapacitors comprises the novel seed layer deposition strategy on the nickel (Ni) substrate. The structure and morphological traits CuCo2O4/GO (CCG), MnCo2O4/GO (MCG), and MnCuCo2O4/GO (MCCG) thin films were systematically acterized by using various physicochemical (FT-IR, SEM-EDX, XRD, and AFM techniques) and electrochemical investigations, which includes cyclic voltammetry (CV), charge-discharge (CHDH) efficiency and EIS reveals the intrinsic properties of modified mixed oxide base electrodes. Cyclic voltammetric analysis revealed that MCG, CCG, and MCCG thin film electrodes achieved specific capacitances of 450, 500, and 850 respectively, at a scan rate of 2 mV/s. In addition, their charge-discharge capacitance (CHDH) was found 600, 500, and 823 F g-1, highlighting the superior energy storage performance of the MCCG electrode. the other mixed oxide-based materials, MCCG based electrode exhibits stable specific capacitance over charge-discharge performance utilizes the excellent cyclic stability and long-term energy storage system. analysis investigates average specific capacitances of 500, 727, and 878 F g-1 for, the CCG, MCG, and electrodes, respectively. The proposed synthesis approach is environmentally friendly and cost-effective, a promising strategy for the development and large-scale manufacturing of next-generation energy devices.
An organic-fused thienocarbazole derivative was synthesized under ambient conditions at room temperature. The obtained thienocarbazole (hereinafter referred to as TCZ) derivative was confirmed by X-ray single crystal diffraction, showing an N-phenylsulfonylcarbazole core connected to thiophene rings. Density functional theory (DFT) calculations were performed at the RB3LYP/6-311G (d, p) level for optimization. The molecular geometry of TCZ derivative adopted a nearly planar conformation, with the fused carbazole-thiophene rings contributing to its structural stability, showing good agreement with the experimental values. Intermolecular interactions in the TCZ derivative crystal were examined using Hirshfeld surface analysis combined with energy framework calculations, providing the nature and energetic contributions of contacts for stabilizing the crystal packing. UV -Visible (TD-DFT) absorption spectroscopy and HOMO-LUMO studies were used to explore its electronic transitions and charge-transfer behavior. The nonlinear optical (NLO) properties were evaluated through first-order hyperpolarizability studies. In addition, natural bond orbital (NBO) and topological analysis elucidated the electron distribution and non-covalent interactions (NCI) of the studied molecule. Furthermore, biological evaluations by using molecular docking analysis were performed to confirm the strong binding affinities with amino acid residues, providing the potential bioactivity of TCZ derivative.
The selective oxidation of isoamyl alcohol (3-methyl-1-butanol) to isovaleraldehyde under mild and environmentally friendly conditions remains a challenging transformation with significant implications for fine chemical production. Herein, we report the synthesis and systematic evaluation of nickel oxide-loaded mesoporous FDU-12 catalysts, NiO(5 wt %)-FDU-12, NiO(10 wt %)-FDU-12, and NiO(15 wt %)-FDU-12, for this transformation using tert-butyl hydroperoxide (TBHP) as a green oxidant. Among these, NiO(15 wt %)-FDU-12 exhibited benchmark performance, achieving 100% conversion with 91.15% selectivity toward isovaleraldehyde at 80 degrees C in acetonitrile (ACN) with minimal overoxidation to isovaleric acid (3.13%). Compared with reported catalysts such as ZnO/Co-HMS and Cr-modified ZSM-5, our system operates at lower temperature, under milder conditions, and with superior aldehyde selectivity, thereby overcoming the common limitations of overoxidation and prolonged reaction times. Structural characterization by BET analysis, XRD, and TEM confirmed the uniform dispersion of NiO nanoparticles and the preservation of the mesoporous network after metal incorporation. Importantly, the catalyst retained >95% of its activity over multiple reaction cycles, highlighting its robustness and reusability. These results establish NiO/FDU-12 as a cost-effective, scalable, and environmentally benign catalyst platform for selective alcohol oxidation, with potential applications in industrially relevant oxidation processes.
Photoluminescence spectroscopy investigation was conducted on semi-insulating 6H-Silicon Carbide subjected to nitrogen ion implantation at fluences of 10(15) and 10(16) N+/cm(2) with 130 keV energy, followed by annealing at 800 degrees C to study recrystallization effects. Deformations related to deep levels variation with implantation and defect recovery were investigated from intrinsic luminescence peaks. Annealing triggers asymmetrical to symmetrical sharp luminescence peaks and regaining the active radiative centers at similar to 555 nm and similar to 561 nm. The perceptible change in quantification of disorder 1-A(norm), with annealing revealed the partial recovery of the high fluence samples indicating the defects accumulations.
