Prabhakar Chavan (Prabhaker Walmik)

@kussc.ac. in

Assistant Professor and Dept. of Chemistry
Kuvempu University, Sahyadri Science College, SHIVAMOGGA



           

https://researchid.co/prabhakar7

M. Sc., M. Phil., & Ph. D degrees from Gulbrga University, Gulbarga. Presently working as s assistant Professor and PG coordinator, Dept. of PG studies in Chemistry, kuvempu University, Sahyadri Science College, SHIVAMOGGA, karnataka, india

EDUCATION

M. Sc., M. Phil., Ph. D.

RESEARCH, TEACHING, or OTHER INTERESTS

Multidisciplinary, General Chemistry, Organic Chemistry, Spectroscopy

18

Scopus Publications

Scopus Publications


  • Synthesis, optical, photocatalytic and electrochemical properties of cobalt doped ZnS nanoparticles
    K.R. Sumadevi, G. Krishnamurthy, H.S. Bhojya Naik, Prabhaker Walmik, Malathesh Pari, N. Ranjitha, R.S. Priya Rani, and P. Parameshwara Naik
    Asian Journal of Chemistry
    Poly(vinyl pyrrolidone) capped and uncapped Co:ZnS nanoparticles have been synthesized by co-precipitation method. These synthesized nanoparticles were characterized using spectral techniques and the optical and photoluminescence properties of nanoparticles were also studied. Poly(vinyl pyrrolidone) capped nanoparticles has been studied for the electrochemical sensing of various biomolecules. The Co:ZnS modified glassy carbon electrode (GCE) proved to be effective nanoparticles composite electrode to detect biomolecules electrochemically with a wide linear detection range of 0.2 to 1.6 μmol/L, Also a low detection limit (LOD) of 0.06 μM/L and excellent sensitivity of 4.366 μA μM-1 has been obtained. It is observed that the particle size of nanoparticles is affected by the capping agent. It is therefore the modified electrode has become a good electrode material with a greater stability without leaching. The optical band gap was determined by UV-visible spectra and the value is found to be in the range of 3.75 to 4.00 eV. The photocatlytic activity on Eriochrome black T dye in the visible region using nanoparticles has been determined. It was found that the capped nanoparticles are more effective in photocatalytic degradation due to low energy consumption and safe recovery of it after catalytic performance from polluted water.

  • Photocatalytic degradation of Eriochrome black-T and Evan’s blue dyes under the visible light using PVA capped and uncapped Ag doped ZnS nanoparticles
    K. R. Sumadevi, G. Krishnamurthy, Prabhaker Walmik, R. S. Priya Rani, Satish Naik, H. S. Bhojya Naik, and Nagaraja Naik
    Springer Science and Business Media LLC

  • Synthesis of reduced graphene oxide decorated with Sn/Na doped TiO<inf>2</inf> nanocomposite: a photocatalyst for Evans blue dye degradation
    K. S. Jithendra Kumara, G. Krishnamurthy, Prabhaker Walmik, Satish Naik, R. S. Priya Rani, and Nagargaja Naik
    Springer Science and Business Media LLC

  • Optical and antibacterial evaluation of biofunctionalized Cu:ZnS nanoparticles
    G. Arun Kumar, H. S. Bhojya Naik, R. Viswanath, G. Krishnamurthy, and Prabhaker Walmik
    Springer Science and Business Media LLC

  • Synthesis and biological evaluation of novel indolyl-dihydropyridin-3-carboxylate, dihydro[1,2,4]triazol[1,5]pyridin-3-carboxylate and carbohydrazide derivatives


  • Design, synthesis of biologically active heterocycles containing Indol- Thiazolyl- Thiazolidinone derivatives
    Prabhakar Walmik, Basavaraj S Naraboli, Swathi B, and Somashekhar Ghanti
    Innovare Academic Sciences Pvt Ltd
     Objective: The present study envisage a novel series of thiazole, indole and thiazolidine derivatives, namely, N-((5-Substituted-2-phenyl-1 H-indol-3-yl)methylene)-4,5,6,7-tetrahydro-5,7,-dimethylbenzo [d]thiazole-2-amine (4a-c), 2-(5-substituted-2-phenyl-1H-indol-3-yl)-3-(4,5,6,7- trimethylbenzo[d]thiazol-2-yl)-thiazolidin-4-one (5a-c) and 5-benzylidine-2-(5-substituted-2phenyl-1H-indol-3yl)-3-(4,5,6,7-tetrahydro-5,5,7- trimethylbenzo[d]thiazol-2-yl) thiazolidin-4-one (6a-c).Methods: All the newly synthesized compounds were characterized by infrared, 1H, 13C nuclear magnetic resonance and mass spectral data and elemental analysis and evaluated for in vitro antimicrobial activity.Results: Novel compounds N-((5-Substituted-2-phenyl-1H-indol-3-yl)methylene)-4,5,6,7-tetrahydro-5,7,-dimethylbenzo [d]thiazole-2-amine (4a-c), 2-(5-substituted-2-phenyl-1H-indol-3-yl)-3-(4,5,6,7-trimethylbenzo[d]thiazol-2-yl)-thiazolidin-4-one (5a-c) and 5-benzylidine-2-(5-substituted- 2phenyl-1H-indol-3yl)-3-(4,5,6,7-tetrahydro-5,5,7-trimethyl benzo[d]thiazol-2-yl)thiazolidin-4-one (6a-c) have been made and characterized using spectral and analytical data. The results of antibacterial and antifungal activities showed that some of the synthesized compounds exhibited promising activities.Conclusion: All the newly synthesized compounds were carried out by the broth microdilution method (NCCLS. 2002) in a DMF concentration of 500, 250, 125, and 62.5 μg/ml. Gentamycin and fluconazole are used as reference standards for antibacterial and antifungal activity, respectively. The final results revealed that compounds 4b, 5b, and 6b exhibited potent antimicrobial activity when compared to the standard drugs. 

  • Synthesis of novel indolyl-thiazolidinone derivatives as antioxidant, antimicrobial and atitubercular agents


  • Synthesis of novel indolyl-azetidinone and thiazolidinone derivatives as a potent antioxidant, antimicrobial and antitubercular agents


  • Synthesis and biological activities of some new annulated pyrazolopyranopyrimidines and their derivatives containing indole nucleus
    Anand R. Saundane, Prabhaker Walmik, Manjunatha Yarlakatti, Vijaykumar Katkar, and Vaijinath A. Verma
    Wiley
    The key intermediate 6‐amino‐3‐methyl‐4‐aryl‐1‐(5′‐substituted‐3′‐phenyl‐1H‐indol‐2′‐carbonyl)‐1,4‐dihydropyrano[2,3‐c]pyrazol‐5‐carbonitriles 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n, 3o were prepared by cyclocondensation of 3‐methyl‐1‐(5′‐substituted‐3′‐phenyl‐1H‐indol‐2′‐carbonyl)‐5‐(4H)‐pyrazolones 1a, 1b, 1c with arylidine derivatives of malononitrile 2a, 2b, 2c, 2d, 2e. The compounds 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n, 3o were subjected to cyclocondensation reaction with formamide, formic acid, and carbon disulfide to afford the title compounds 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, 4l, 4m, 4n, 4o, 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5i, 5j, 5k, 5l, 5m, 5n, 5o, and 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j, 6k, 6l, 6m, 6n, 6o, respectively. The structures of all these previously unknown compounds were confirmed by their spectral studies and elemental analysis. These compounds were screened for their antimicrobial and antioxidant activities.

  • Synthesis of novel N-(aryl) diazenyl thiazol-2-amines and bezylidenethiazolidin- 4-ones linked to indole nucleus as antioxidant, antimicrobial, antimycobacterial and cytotoxic agents


  • Synthesis, antimicrobial and antioxidant activities of some new indole derivatives containing pyridopyrimidine and pyrazolopyridine moieties
    Anand R. Saundane, Katkar Vijaykumar, A. V. Vaijinath, and Prabhaker Walmik
    Springer Science and Business Media LLC

  • Synthesis, antioxidant, antimicrobial, antimycobacterial, and cytotoxic activities of azetidinone and thiazolidinone moieties linked to indole nucleus
    A. R. Saundane and Prabhaker Walmik
    Wiley
    2‐N‐(2‐Phenyl‐1H‐indol‐3‐yl)imino‐4‐arylthiazoles (3a–c) were used as key synthons for the preparation of (4‐arylthiazol‐2‐yl)‐4‐(2‐phenyl‐1H‐indol‐3‐yl)azetidin‐2‐ones (4a–c) and 3‐(4‐arylthiazol‐2‐yl)‐2‐(2‐phenyl‐1H‐indol‐3‐yl)thiazolidin‐4‐ones (5a–c). These newly synthesized compounds have been characterized with the help of IR, 1H NMR, 13C NMR, and mass spectral studies. All compounds were screened for their antioxidant, antimicrobial, antimycobacterial, and cytotoxic activities. Some of the compounds displayed excellent activity.

  • Synthesis, antioxidant and antimicrobial activities of indolyl pyrazoles


  • Synthesis, antimicrobial and antioxidant activities of some indole analogues containing naphthyridine and pyrimidonaphthyridine systems


  • Synthesis, antioxidant and antimicrobial evaluation of thiazolidinone, azetidinone encompassing indolylthienopyrimidines
    ANAND RAGHUNATH SAUNDANE, MANJUNATHA YARLAKATTI, PRABHAKER WALMIK, and VIJAYKUMAR KATKARf
    Springer Science and Business Media LLC

  • Synthesis and biological activities of some 5-substituted 2-phenyl-3-(6-aryl-3-cyano-2-substituted pyridin-4-yl) indoles


  • Synthesis and antimicrobial activities of 5(2' S'-disubstitutedih- Indol-3'-yl)-5h-thiazolo [4,3-b]1,3,4-oxadiazole, -1,3,4-thiadiazole, -1,2,4triazole and their derivatives