Manonmaniam Sundaranar University
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Publications
2 649
Citations
40 210
h-index
80
Top-3 journals
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Journal of Molecular Structure
(84 publications)
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Journal of Materials Science: Materials in Electronics
(80 publications)
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Multimedia Tools and Applications
(50 publications)
Top-3 organizations
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King Saud University
(159 publications)
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Annamalai University
(102 publications)
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Anna University
(85 publications)
Top-3 foreign organizations
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King Saud University
(159 publications)
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Chiang Mai University
(23 publications)
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Alexandria University
(19 publications)
Most cited in 5 years
Found
Publications found: 372
Influence of Metal Ions on the Structural Complexity of Mixed-Ligand Divalent Coordination Polymers
Cheng F., Wang K., Lee C., Wang S., Thapa K.B., Govindaraj M., Chen J.
The reactions of the angular ligand 4,4′-oxybis(N-(pyridin-3-yl)benzamide) (L1) and 1,4-naphthalenedicarboxylic acid (1,4-H2NDC) with divalent metal salts yielded three distinct coordination polymers (CPs): {[Zn2(L1)(1,4-NDC)2]·MeOH}n, 1, {[Cu(L1)(1,4-NDC)(H2O)]·3H2O}n, 2, and {[Cd(L1)(1,4-NDC)]·2H2O}n, 3. Complex 1 features a 2-fold interpenetrated 3D framework with the (412·63)-pcu topology, while complex 2 reveals a 1D triple-strained helical chain and complex 3 displays a 3-fold interpenetrated 3D framework with (66)-dia topology. Additionally, the reactions of the flexible ligand N,N′-bis(3-methylpyridyl) adipoamide (L2) afforded {[Co4(L2)0.5(1,4-NDC)3(H2O)3(µ3-OH)2]·EtOH·2H2O}n, 4, {[Zn2(L2)(1,4-NDC)2]·2CH3OH}n, 5, and [Cd(L2)(adipic)(H2O)]n (H2adipic = adipic acid), 6, exhibiting a self-catenated 3D framework with the (420·68)-8T32 topology, a 2D layer with the (413·62) − (4,4)IIb topology, and a 2D layer with the (44·62)-sql topology, respectively. The structural diversity observed in complexes 1–6 highlights the pivotal influence of the metal center on the degree of entanglement in CPs within mixed-ligand systems. The thermal stability and luminescent properties of complexes 1–3, 4, and 6 are also discussed.
Growth and characterization of semi-organic, third-order nonlinear optical (NLO) phthalic acid potassium chloride (PAPC) single crystals
Natarajan R., Meena M., Shalini M., Ebinezer B.S., Sundararajan R.S., Girisun T.C.
The utilization of slow evaporation solutions has proven to be an effective method for obtaining single crystals of semi-organic NLO from an aqueous solution. Throughout the course of this experiment, the ambient temperature was employed. Information about the crystal’s structure was revealed through single-crystal XRD, showing that it was (PAPC) crystallized in a cubic system with space group F. Through the utilization of FT-IR analysis, the arrangement of functional groups within the developed crystal was identified. A 223 nm cut-off wavelength was determined through UV–Vis–NIR spectroscopy. Apart from linear optical properties like the extinction coefficient (K) and reflectance (R), various geometrical aspects were analyzed in this investigation. Furthermore, the crystal exhibited a significant degree of optical transparency. The analysis of the fluorescence (FL) spectrum has been employed to study the behavior of PAPC luminescence. Different frequencies ranging from 50 Hz to 200 kHz have been employed to investigate the dielectric characteristics of PAPC. The threshold value for laser-induced damage was discovered to be significantly higher when compared to KDP and other organic materials. The SEM was utilized to examine the surface morphology of the crystal for a more comprehensive understanding of its appearance. EDAX analysis was performed on the PAPC crystal to identify the elemental composition within. The electrical characteristics were determined through impedance analysis. We employed a Vickers microhardness tester to determine the brittleness index (Bi), along with the hardness (Hv), Meyer’s index (n), yield strength (σy), fracture toughness (Kc), and elastic stiffness constant (C11). The investigation of the crystal’s third-order nonlinear optical properties was conducted utilizing the Z-scan method with a nano-pulsed Nd:YAG laser. The material displays either genuine two-photon absorption or an excited-state absorption. PAPC emerges as a potential candidate for optical limiting devices owing to its elevated nonlinear absorption coefficient (0.96 × 10–10 m/W) and reduced onset optical limiting threshold (2.14 × 1012 W/m2).
Correction to: Experimental investigation of dual-slope and pyramid structural solar stills with various latent heat absorption materials for enhanced solar energy conversion
Vivek V.A., Srividhya P.K., Pandiaraj V., Ramkumar P., Vivek C.M.
Q3
Interactions
,
2024
,
citations by CoLab: 0
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Retraction Note: Parkinson’s disease prediction and drug personalization using machine learning techniques
Begum M.S., Balajee A., Kulothungan S., Santhakumar D., Basheer S.
Q2
Soft Computing
,
2024
,
citations by CoLab: 0
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One-step synthesis and fabrication of ZrMo2O8 nanostructures as advanced electrode material for energy storage applications
Rajkumar S., Karthikeyan M., Manohar A., Dhineshkumar S., Princy Merlin J.
Nanostructures of metal molybdates show great potential as high-performance electrode materials for the forthcoming development of energy storage devices. In present work, ZrMo2O8 nanostructure was constructed using a simple chemical procedure and followed by examination with the aid of several spectral and analytical tools. The supercapacitive properties of ZrMo2O8 electrode material were investigated using Cyclic voltammetry (CV), Galvanostatic charge–discharge (GCD) and Electrochemical Impedance Spectroscopy measurements (EIS). The as-prepared ZrMo2O8 nanostructures as supercapacitor (SC) electrode material exhibited pseudocapacitive performance with notable value of 288C g−1 at 1 A/g, significant cycling stability and 92.5% capacity retention with the coulombic efficiency of 87.4% even after 5000 GCD cycles at 1 A/g. The morphological investigations indicated that the higher Specific capacity (Cs) was primarily caused by the significant increase in active sites as well as active surface area. The Bode phase angle plot of ZrMo2O8 exhibited a low frequency intercept, with emphasis at approximately −52° phase angle, indicating a superior redox signature. The results infered that ZrMo2O8 nanostructures are promising candidates for high performance energy storage applications.
Availability of π–Cation Radical in the Oxidative Products of Oxidovanadium Porphyrin: Significance for DNA Binding and Antibacterial Activity
Muzaddadi I., Murugan A., Saha S., Raman N., Selvaraj F., Manohar A., Kulandaisamy A., Kumar P., Borah R., Shellaiah M., Ravikumar C. ., Hussain M.
ABSTRACTOxidovanadium meso‐tetrakis(3,4,5‐trimethoxyphenyl) porphyrin [VO(T(OMe)3PP)] (Complex 1) was prepared. The oxidation product of Complex 1 has been characterized by cyclic voltammetry (CV), UV–visible spectrophotometer, electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) by the addition of SbCl5 to Complex 1. There is a one‐electron oxidation product in Complex 1 that creates π–cation radicals in CV data. This is supported by an IR spectrophotometer. Subsequent EPR spectra verified the initiation of the π–cation monoradical, which subsequently transforms into a triplet state where S = 1. DNA binding and antibacterial analysis with Complex 1 have also been analysed. In the DNA‐binding analysis, the CV data confirm the interaction between Complex 1 and DNA. Furthermore, the fact that Complex 1 is more effective at killing bacteria shows that the metal ion's chelation with the porphyrin ligand makes it more lipophilic.
Investigation of Oxidative Behaviour and Structural Insights of (3,4,5-Trimethoxyphenyl)Porphyrin Ni(II) Complex: Experimental and Theoretical Study
Muzaddadi I.U., Murugan A., Hemamalini M., Tahir M.N., Raman N., Bezbaruah B., Ahmed B., Manohar A., Kulandaisamy A., Hussain M.F., Rajkumar T.
Meso 5,10,15,20-tetrakis(3,4,5-trimethoxyphenyl)porphyrin [H2T(3,4,5-OCH3)PP] and its Ni complex [T(3,4,5-OCH3)PP Ni] (complex 1) have been prepared. Its oxidation characteristics were examined using diverse analytical techniques, such as UV-visible spectrophotometry (UV-Vis), electron paramagnetic resonance (EPR), cyclic voltammetry (CV), and nuclear magnetic resonance (NMR) with antimony pentachloride (SbCl5) or trifluoroacetic acid (TFA). The structure of the titled compound has been confirmed by single-crystal analysis. Cyclic voltammetry study of complex 1 provides that NiII is converted to NiIII porphyrin through π-cation radical formation which is further EPR supported by IR spectrum peaks at 1276 cm–1 with the addition of SbCl5. The confirmation of formation of the π-cation radical has been established by the emergence of a novel peak at 649.5 nm in the UV-visible spectrum. This peak, indicative of oxidation, was observed at the central Ni ion, distinguishing it from the porphyrin macrocycle. Additionally, the EPR spectrum informed the formation of Ni(III) from Ni(II) porphyrin which is oxidized with SbCl5 or CF3COOH (TFA) as $$d_{z}^{2}$$ orbital has a single electron with high spin, S = 3/2 ground state in complex 1. Crystallographic analysis and Hirshfeld surface analysis, show hydrogen bonding and molecular packing in the crystal lattice. DFT calculation and experimental HOMO–LUMO gap in solvent closely align with the theoretically determined HOMO–LUMO energy difference (0.92 eV) for complex 1.
An ecofriendly approach for the synthesis of Ni/NiO/g-C3N4 nanocomposite using Cleome gynandra leaf extract for biomedical and photocatalytic applications
Sumethra R., Jayakumari T., Gayathri P., Ravichandran K., Varshini M., Jenipher C., Ayyanar M.
The (Ni/NiO)[Formula: see text]/g-C3N4 nanocomposite was green synthesized using Cleome gynandra via sol–gel method. The photocatalytic dye decomposition, antioxidant and antidiabetic activities of the nanocomposite were studied and compared with those of (Ni/NiO)[Formula: see text] and g-C3N4. The nanocomposite exhibited enhanced photocatalytic efficiency of 97% compared to (Ni/NiO)[Formula: see text] (63%) and g-C3N4 (80%) due to the synergistic effect between both the composite partners. The nanocomposite, (Ni/NiO)[Formula: see text]/g-C3N4 showed notable antioxidant activity in DPPH (IC[Formula: see text] of [Formula: see text][Formula: see text][Formula: see text]g/mL with 87.06% of inhibition at 500[Formula: see text][Formula: see text]g/mL) and ABTS (IC[Formula: see text] of [Formula: see text][Formula: see text][Formula: see text]g/mL with 88.40 % of inhibition at 500[Formula: see text][Formula: see text]g/mL) radical scavenging assays. The green synthesized nanocomposite also exhibited significant antidiabetic activity in [Formula: see text]-amylase and [Formula: see text]-glucosidase enzyme inhibition assays with the IC[Formula: see text] of [Formula: see text][Formula: see text][Formula: see text]g/mL and [Formula: see text][Formula: see text][Formula: see text]g/mL, respectively. The XRD and SEM analyses confirmed the nanocomposite formation of (Ni/NiO)[Formula: see text]/g-C3N4. The results showed that the green synthesized (Ni/NiO)[Formula: see text]/g-C3N4 has desirable dye degradation, antidiabetic and antioxidant properties. This paper presents the results of the remarkable photocatalytic dye decomposition, antidiabetic and antioxidant properties of the nanocomposite (Ni/NiO)[Formula: see text]/g-C3N4 synthesized via an eco-friendly greeny way using Cleome gynandra leaf extract which may be the first report of this kind utilizing this plant.
Retraction Note: Improving the prediction rate of unusual behaviors of animal in a poultry using deep learning technique
Thenmozhi M., Saravanan M., Mohan Kumar K.P., Suseela S., Deepan S.
Q2
Soft Computing
,
2024
,
citations by CoLab: 0
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Towards greener horizons: a comprehensive review of energy auditing in hybrid solar and wind systems
T G., Kesavan J., Srividhya P.K., Ramkumar P.
The intermittency and dependability problems with renewable energy sources have drawn a lot of attention to hybrid solar and wind energy systems. This study offers a thorough analysis of the development, present developments, and potential future applications of hybrid wind and solar systems, emphasizing the vital role energy auditing plays in improving system performance. According to our data, modern hybrid systems may improve energy efficiency by about 25% while reducing greenhouse gas emissions by up to 40% when compared to standalone systems. Furthermore, the capacity factor of these systems has increased by 30% as a consequence of the integration of cutting-edge control mechanisms and energy storage technologies. The significance of data analytics and machine learning in energy auditing which may enhance system optimization by an extra 20% is also covered in this study. Case studies show that hybrid systems are a competitive alternative to conventional energy sources because they can attain better capacity factors and lower levelized energy prices. These results highlight the potential of hybrid systems to make a substantial contribution to the generation and management of sustainable energy.
One-step synthesis of nanostructured Ag2Mo2O7 with enhanced efficiency for supercapacitors
Rajkumar S., Gowri S., Karthikeyan M., Dhineshkumar S., Ansar S., Priyadharshan M., Merlin J.P.
Owing to the energy crisis and environmental pollution deterioration, people are working to develop new kinds of electrical energy storage systems. Bimetallic oxides have been considered potential candidates for supercapacitors (SCs) due to their relatively high electric conductivity and abundant redox reactions. Herein, we designed and synthesized nanostructured Ag2Mo2O7 by the simple chemical route and further examined the sample with different kinds of spectral and analytical tools. The Fourier Transform Infrared Spectroscopy (FTIR) studies analyzed the different vibration and starching modes of metal oxide and the pure phase of the obtained Ag2Mo2O7. The morphology nature of nanoflakes Ag2Mo2O7 can be easily identified from field emission scanning electron microscopy (FE-SEM) can be observed. X-ray photon spectroscopy (XPS) studies the oxidation states of the Ag 3d, Mo 3d and O 1 s, which validates the XRD data. The as-prepared Ag2Mo2O7 nanostructure was used as supercapacitor (SC) electrode material, and it exhibited pseudocapacitive performance with noticeable specific capacity (Cs) of 430 C g−1 at 1 A g−1 and significant cycling stability of 93.7% capacitance retention with the coulombic efficiency of 85.2% even up to 5000 GCD cycles at 1 A g−1. The morphological investigations indicated that the higher Cs values were mainly caused by the significant increase in active sites as well as active surface area. The Bode phase angle plot of Ag2Mo2O7 exhibited a low frequency intercept, with emphasis at approximately − 50.6° phase angle, which indicated a superior redox signature. The results infer that these highly electroactive binary metal oxide nanostructures are promising candidates for high performance energy storage applications.
Experimental investigation of dual-slope and pyramid structural solar stills with various latent heat absorption materials for enhanced solar energy conversion
Vivek V.A., Srividhya P.K., Pandiaraj V., Ramumar P., Vivek C.M.
The study explores the performance of dual-slope and pyramid structural solar stills, focusing on the addition of an additional basin to improve efficiency. The methodology involves fabricating and testing both single-basin and double-basin configurations under controlled conditions. Key findings indicate a consistent increase in productivity for the double-basin configuration, with enhanced solar energy conversion efficiency and higher heat absorption rates. Stable temperature differentials confirm a controlled thermal environment, crucial for successful distillation. Key performance metrics such as productivity, solar energy conversion efficiency, heat absorption rate, and temperature differentials were examined. Results showed a consistent increase in productivity by up to 15% for the double basin configuration, indicating enhanced solar energy conversion efficiency and higher heat absorption rate. The stable temperature differentials also confirmed a controlled thermal environment within the solar stills, crucial for successful distillation. The findings contribute to the understanding of sustainable water desalination technologies and highlight the potential for tailored designs to address specific environmental conditions and enhance efficiency.
Chemical resistance and mechanical characteristic evaluation of glass fiber reinforced plastic (GFRP) and hybrid natural composites
Pandiaraj V., Ramkumar P., Tharik J.M., Vikram R., Logasubramani S., Vivek C.M.
This study explores the complex nature of hybrid composites, a blend of polypropylene and glass fibre reinforced plastic (GFRP), and their relationship with mechanical, chemical, and fracture surface morphology. The goal is to understand the interplay between polypropylene content and the performance attributes of these composites. Mechanical testing revealed a significant increase in tensile strength, compressive strength, impact strength, and hardness with the addition of polypropylene. A composite with 25% polypropylene infusion showed enhanced mechanical performance. In the realm of chemical resistance, a composite with 10% polypropylene and 90% GF demonstrated exceptional resistance against bases, acids, and solvents. This composite was a symbol of chemical resistance, offering a fortification against harsh chemical conditions. The rise in polypropylene percentage in the composite mirrored an increase in chemical resistance, demonstrating the composites’ adaptability to chemical adversity.
Green hydrogen as a fuel in UAVs: an extended range operational pathway for sustainability
Ramkumar P., Kumar A., Muthumari S., Vivek C.M.
The possible use of green hydrogen as an unmanned aerial vehicle (UAV) fuel source is examined in this research. This investigation is used to compare with the conventional battery-powered and internal combustion engine UAVs in terms of operational and environmental benefits. The study outline focus on the important benefits of green hydrogen, because of its high energy density, which allows in far longer flight lengths, its zero-emission operation, which promotes environmental sustainability, and its very silent operation, which permits covert operations. The research also examines storage and infrastructural issues that arise when integrating hydrogen fuel cells into unmanned aerial vehicles. The study concludes by out reaching the current research and development initiatives aimed at resolving these issues and opening the door for a larger uptake of green hydrogen in the UAV sector. This research is an important step towards long-range, sustainable UAV operations, advancing several industries, including commercial delivery, environmental monitoring, and search and rescue operations.
A Study of Rental Housings and Its Policies for the Urban Poor in India
Mehta P., Subramanian C.V.
The Covid-19 Pandemic in 2020 highlighted the plight of the urban poor, and the phenomenon of reverse migration was experienced by them. People were in need of food, clothing, and shelter in the City. This research paper will use the case study of an Urban Village in Noida, Uttar Pradesh, to understand the existing scenarios of rental housing occupied by the urban poor through an observational study. It explores the issues of identity in the City, the spatial, environmental, and sociological implications of ad-hoc rental housing development, and how the affordable rental housing complex under PMAY (U) misses the aspects that provide the urban poor housing justice in the City. Currently, architects, urban designers, and policymakers’ approach to merely generating an economic response to the issue of rental housing in India. This research paper aims to explore a holistic approach to addressing the phenomenon of affordability, accessibility, adequacy, and viability as a part of urban rental housing policy for the urban poor through the urban design lens.
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