Qualification: 
Ph.D, MPhil, MSc
Email: 
viswanathanm@am.amrita.edu

Dr. Viswanathan M. currently serves as Professor at the Department of Chemistry, Amrita School of Arts and Sciences, Amritapuri. He holds Ph. D. in Coordination Chemistry from University of Kerala. His area of research interest is Coordination Chemistry.

He joined Amrita in 2011 with several years of teaching, research and administrative experience.

Dr. Viswanathan obtained his M. Sc. from Sree Narayana College, Kollam (University of Kerala) in 1978, then received his M. Phil. from University of Kerala. He taught at diferrent Sree Narayana Colleges under Kerala and Calicut Universities for over 32 years and was Head of the Postgraduate and Research Department of Chemistry at S. N. College and S. N. College for Women, Kollam.

He has served as Principal of S. N. College, Alathur(Palakkad district), S. N. College Chathannur, S. N. College Punalur and Sree Narayana College, Kollam.

Dr. Viswanathan has served as a member of Board of Examination of M. Sc. at University of Kerala. He has also served as a member of the Board of Studies in Chemistry and as a member of the Faculty of Science at Unversity of Kerala.

He has published 15 books in Chemistry and 14 publications are to his credit. Dr. Viswanathan has supervised the project works of several M. Sc. students and is currently guiding 2 research candidates.

Publications

Publication Type: Journal Article

Year of Publication Publication Type Title

2016

Journal Article

Dr. Viswanathan M., “Synthesis, characterization and antibacterial studies of Pr(III), Nd(III), Gd(III), Sm(III) and Dy(III) complexes with N-(1-morpholinobenzyl)semicarbazide”, Asian Journal of Chemistry, vol. 28, pp. 907-909, 2016.[Abstract]


A series of chelate complexes of the lanthanide ions Pr(III), Nd(III), Gd(III), Sm(III) and Dy(III) with a Mannich base, N-(1-morpholinobenzyl) semicarbazide (MBS) have been synthesized and characterized. The structures of these complexes have been elucidated by the analytical, magnetic, electrical conductivity and spectral studies. The complexes exhibit the general formula [Ln(MBS)3] where Ln = Pr3+, Nd3+, Gd3+, Sm3+ and Dy3+ and MBS = morpholinobenzyl semicarbazide. The biological activities of the ligand and the complexes against E. coli, S. aureus, K. pneumoniae and P. aeruginosa were also studied. The metal chelates have higher activity than that of the free ligand, N-(1-morpholinobenzyl)semicarbazide.

More »»

2016

Journal Article

Dr. Viswanathan M., “Synthesis and elucidation of some mixed ligand complexes of Th(IV) with N-(1-morpholinobenzyl)semicarbazide”, Asian Journal of Chemistry, vol. 28, pp. 1221-1224, 2016.[Abstract]


Some mixed ligand complexes of Th(IV) with Mannich base N-(1-morpholinobenzyl)semicarbazide (MBS) and various anions like chloride, nitrate, acetate, thiocyanate and perchlorate have been synthesized and characterized. Their probable structures have been elucidated by elemental analysis, determination of molar mass, measurement of molar conductance, spectral and X-ray diffraction studies. The complexes exhibit formulae: [Th(MBS)3X], where X = NO3 -, Cl-, CH3COO-, SCN- or ClO4 -. In all these complexes, N-(1-morpholinobenzyl)semicarbazide acts as a bidentate ligand and anions act as unidentate ligands. The antimicrobial activities of ligand and metal chelates against E. coli, S. aureus, K. pneumoniae and P. aeruginosa were also studied. More »»

2016

Journal Article

Dr. Viswanathan M., “Synthesis, spectral, X-ray diffraction and antibacterial studies of oxovanadium(IV) and dioxouranium(VI) complexes of N-(1-morpholinobenzyl)semicarbazide”, Asian Journal of Chemistry, vol. 28, pp. 1621-1623, 2016.[Abstract]


Oxovanadium(IV) and dioxouranium(VI) complexes of a Mannich base derived from morpholine, benzaldehyde and semicarbazide hydrochloride have been synthesized and characterized. The probable structures of these complexes were elucidated by elemental analysis, molar mass, molar conductance, spectral and X-ray diffraction studies. The formulae exhibited by complexes are: [VO(MBS)2]·2H2O and [UO2(MBS)2(H2O)2], where MBS = N-(1-morpholinobenzyl)semicarbazide. The biological activities of ligand and metal chelates against S. aureus, K. pneumoniae, P. vulgaris and E. coli were also investigated. The metal chelates have higher activity than that of free Mannich base, N-(1-morpholinobenzyl)semicarbazide.

More »»

2016

Journal Article

S. Arularasan, Dr. Viswanathan M., Maran, B. A. Venmathi, Zaman, G. U., and M Shekar, C., “Variation in Shell Morphology and Adult Specimen Weight in Three Varieties of a Commercially Important Gastropod Turbinella Pyrum (Linnaeus, 1767) From Southeast Coast of India”, J Marine Sci Res Dev, vol. 6, pp. 2-4, 2016.[Abstract]


Using morphological traits including weight, the genetic group effect in three varieties of Turbinella pyrum was determined. A total of 300 T. pyrum individuals (100 per variety) were used. The morphometric analysis showed that the shell outer lip thickness and operculum width were found to be significantly different in between the three varieties of T. pyrum. The study also showed that the shell length, body whorl length and operculum length significantly differed in between G1 (var. obtusa) and G2 (var. acuta synonymous T. rapa) and shell width differed significantly in between G2 (var. acuta) and G3 (var. globosa). The effect of genetic group on the shell depth and adult animal weight were found to be non-significant. The observed mean length, width and depth in G1 genetic group (var. obtusa) supports its higher market value in comparison to the other two genetic groups studied. This variety has moderate lip thickness, which may be another reason for its higher demand in bangle industry than the other two genetic groups. The G2 (var. acuta) and G3 (var. globosa) genetic groups although comparatively larger, have a disproportionate body size then G1 (var. obtusa). The standardized shell morphological characters in present study are helpful to draw primary guidelines for identification of three T. pyrum varieties studied. The present morphometry data on T. pyrum varieties also plays key role for species description and also for their domestication. More »»

2015

Journal Article

Dr. Viswanathan M., “Synthesis, Characterization and Antibacterial Studies of Some Complexes of Pr(III), Nd(III), Gd(III), Sm(III) and Dy(III) with N-(1-morpholinobenzyl)semicarbazide”, Asian J. Chemistry, vol. 28, pp. 907–909, 2015.

2015

Journal Article

Dr. Viswanathan M., Arularasan, S., Patel, A. K., M Shekar, C., Nathani, N. M., Shah, R. K., Rank, D. N., Joshi, C. G., and Balasubramanian, T., “Cytotoxic Effect of Venom Produced in Vitro from Primary Culture of Conusbiliosus Venom Duct Cells on HEK 293t Cells”, Advances in Biological Research, vol. 9, pp. 133–139, 2015.[Abstract]


Bioweapon synthesis through animal cell culture technique is gaining significant interest for the development of new drugs related to human diseases. Marine cone snail’s venom is a potential source of unique bioactive neurotoxic peptides which can be utilized for treating cancer. Here, we describe establishment of primary culture of venom duct epithelial cells from Conusbiliosusand demonstrate that secretory cells of venom duct can be potential in vitro source for venom production. The venom duct cells remained in suspension in the primary culture with no signs of adhesion and continued slow but sustained proliferation.Cytotoxic effects of culture supernatant on HEK 293T cells showed inhibitory effect on cell growth providing probable evidence for cono-peptides production. More »»

2009

Journal Article

Dr. Viswanathan M., “Structural and Physico-Chemical Elucidation of Oxovanadium (IV) and Dioxouranium (VI) Complexes of N-(Pyrrolidinobenzyl) benzamide”, Asian Journal of Chemistry, vol. 21, pp. 4224-4232, 2009.[Abstract]


Oxovanadium(IV) and dioxouranium(VI) complexes of N-(pyrrolidinobenzyl)benzamide (PBB) have been synthesized and characterized by elemental analyses, molar conductance, infrared spectra, magnetic susceptibility measurements, thermal, X-ray powder diffraction and antimicrobial studies. The complexes exhibit the following formulae [VO(PBB)2]·2H2O and [UO2(PBB)2(H2O)2]. More »»

2008

Journal Article

Dr. Viswanathan M. and Raji, V., “Synthesis and Characterization of N-(Pyrrolidinobenzyl)-benzamide and its Complexes with Cobalt (II), Nickel (II), Copper (II) and Zinc (II)”, Asian Journal of Chemistry, vol. 20, p. 113, 2008.[Abstract]


A new Mannich base, N-(pyrrolidinobenzyl) benzamide, derived from pryrrolidine, benzamide and benzaldehyde and its complexes with cobalt (II), nickel (II), copper (II) and zinc (II) have been synthesized and characterized. Their chemical composition have been established from microanalytical, magnetic, molar conductance, spectral, thermal and X-ray powder diffraction studies. In these complexes, N-(pyrrolidinobenzyl) benzamide acts as a bidentate ligand and all the complexes exhibit square planar geometry. More »»

2008

Journal Article

Dr. Viswanathan M., “Synthesis, Characterization and Antibacterial Studies of Mixed Ligand Complexes of Cobalt (II) and Nickel (II) with Pyrrolidinobenzylurea and Nitrate ion”, Asian Journal of Chemistry, vol. 20, p. 6090, 2008.[Abstract]


Mixed ligand complexes of cobalt(II) and nickel(II) with a Mannich base derived from benzaldehyde, pyrrolidine and urea, i.e., pyrrolidinobenzylurea and nitrate ion have been synthesized and characterized. The analytical data include elemental analysis, determination of molar mass, conductivity, spectral and X-ray power diffraction studies. The antibacterial activity of the ligand and the metal complexes have also been studied. More »»

2007

Journal Article

Dr. Viswanathan M., “Synthesis and Characterization of Complexes of Thorium (IV) with Pyrrolidinobenzyl Benzamide and Various Anions”, Asian Journal of Chemistry, vol. 19, p. 2806, 2007.[Abstract]


A series of complexes of Th(IV) with pyrrolidinobenzyl benzamide (PBB), a Mannich base derived from pyrrolidine,benzamide and benzaldehyde and various anions such as chloride, nitrate, acetate, thiocyanate and perchlorate have been synthesized and characterized. Their probable structures have been determined by elemental analysis, molar mass,conductivity, spectral, thermal and X-ray diffraction studies.The complexes exhibit the formulae : [Th(PBB)3X] where X= Cl–, NO3–, NCS– , CH3COO– or ClO4–. In these complexes the PBB acts as a bidentate ligand, whereas the monovalent anions act as unidentate ligands. The biological activities of the ligand and their metal chelates against E. coli, S. aureus,K. pneumoniae and P. aeruginosa were also studied. The complexes have higher activity than that of the free Mannich base. More »»

2006

Journal Article

Dr. Viswanathan M., “Synthesis and Characterization of Some Lanthanide(III) Complexes with N-(Pyrrolidinobenzyl)benzamide”, Asian Journal of Chemistry, vol. 18, pp. 2787-2791, 2006.

2005

Journal Article

Dr. Viswanathan M., “Synthesis and Characterization of VO (IV) and UO2 (VI) Complexes with Nitrogen and Oxygen Donor Ligands”, Asian Journal of Chemistry, vol. 17, pp. 1199-1206, 2005.

2005

Journal Article

Dr. Viswanathan M., “Synthesisg and CharaCteriZation of lineal.) and Cadmiumal) Complexesof: N, N’-ethylene-bis (3-carhoxypmpenamide)”, Asian Journal of Chemistry, vol. 17, pp. 2611-2615, 2005.

2005

Journal Article

Dr. Viswanathan M., “Synthesis and characterization of mixed ligand complexes of thorium (IV) with N, N'-propylenebis (3-carboxypropenamide) and various anions”, Journal of the Indian Chemical Society, vol. 82, pp. 871–874, 2005.[Abstract]


A new series of mixed ligand complexes of thorium (IV) with N, N'-propylenebis (3-carboxypropenamide)[PBCPH 2] and various monovalent anions such as nitrate, perchlorate and thiocyanate have been synthesized. These complexes were characterised by chemical analysis, conductance, magnetic, X-ray powder diffraction, spectral and thermal studies. From these studies the composition of the complexes were ascertained to be [Th (PBCP) X 2] and [Th (PBCP)(ClO 4)] OClO 3, where X= NO-3 or NCS ... More »»

2005

Journal Article

Dr. Viswanathan M. and Krishnan, G., “Thermal studies on some transition metal complexes with N, N'-triethylenediaminebis (3-carboxypropenamide)”, Journal of the Indian Chemical Society, vol. 82, pp. 545–546, 2005.[Abstract]


Thermogravimetric studies of manganese (II), cobalt (II), nickel (II) and copper (II) complexes of N, N'-triethyleiiediaminebis (3-carboxypropenamide)[TEBCPH 2] have been carried out which give valuable information about the temperature of inception, of maximum rate and of complete decomposition. The thermal decomposition of the complexes of manganese (II) and cobalt (II) occurs in three stages whereas that of nickel (II) and copper (II) in two stages. These stages of decomposition are attributed to the removal of the ligand ... More »»

2005

Journal Article

Dr. Viswanathan M., “Synthesis, Spectral, Thermal, X-ray Diffraction and Antibacterial Studies of Zinc (II) and Cadmium (II) Complexes of Piperidinobenzyl Urea”, Asian Journal of Chemistry, vol. 17, pp. 2679-2684, 2005.

2004

Journal Article

Dr. Viswanathan M. and Krishnan, G., “Synthesis and Characterization of Mixed Ligand Complexes of Praseodymium (III), Neodymium (III), Samarium (III), Gadolinium (III) and Dysprosium (III) with Piperidinobenzylurea”, Asian Journal of Chemistry, vol. 16, p. 156, 2004.

2004

Journal Article

Dr. Viswanathan M. and Krishnan, G., “Synthesis and Characterization of Manganese (II), Cobalt (II), Nickel (II), Copper (II), Zinc (II) and Cadmium (II) Complexes of N, N\'}-Triethylenediamine-bis-(3-carboxypropenamide)”, Asian Journal of Chemistry, vol. 16, pp. 169–173, 2004.[Abstract]


A series of complexes of transition metal ions with a new hexadentate ligand, N, N'-tn'ethylenediamine-bis-(3-carboxypropenamide)(TEBCP) have been synthesized and characterized by chemical analysis, conductance, magnetic, X-ray powder diffraction and infrared, electronic and esr spectral studies. The complexes except that of copper (II) have been as-signed the formula [M (TEBCP)] where M= Mn, Co, Ni, Zn or Cd. These have octahedral geometry. The proposed formula of the complex of copper is {Cu2 (TEBCP) More »»

2004

Journal Article

Dr. Viswanathan M., “Synthesis, Spectral and Thermal Studies of Vo(IV) and UO2 (VI) Complexes with N,N´ - Triethylenediamine- Bis(3-Carboxypropenamide)”, Asian Journal of Chemistry, vol. 16, pp. 1881-1888, 2004.

Faculty Research Interest: 
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