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Dr. Rameswara Rao Modalavalasa
Dr. M. Rameswara Rao obtained his PhD degree in 2009 from Jawaharlal Nehru Technological University – Hyderabad under the supervi¬sion of Prof. K. B. ChandraSekhar. He completed his Masters in chemistry from Acharya Nagarjuna University Guntur. Currently, he is working with Dr. Reddy’s Laboratories Hyderabad. He is a life time member for Indian Science Congress. He has published various papers in reputed International and National journals as author and co-author. He had attended and presented his research article in various national and international Conferences. He is also serving as reviewer in some journal of repute. His area of interest is Chromatography, Spectrophotometry, Spectroscopy, Pharmaceutical Analysis, Analytical Chemistry, etc.,
Supervisors: Superviosor: Dr.K.B.CHANDRASEKHAR, Professor of chemistry & Director JNTUA OTPRI, Anantapur, Advisor: Dr.N.DEVENNA, Professor and Head of chemistry, JNTU Anatapuramu, Adviosor: Prof.B Syamasundar, Rtd. Professor of Chemistry, Acharya Nagarjuna University, Guntur, Former Vicechoncellor of Yogi Vemena University., and Adviosor: Dr. B. Mallikarjuna Rao, Vicepresident & Head Corporate Quality Control, Dr.Reddys Laboratories.
Phone: 9885282328
Address: Dr. M. Rameswara Rao,
Assistant Manager,
IT - Business Process Excellence
Dr.Reddy's Laboratories,
Hyderabad.
Supervisors: Superviosor: Dr.K.B.CHANDRASEKHAR, Professor of chemistry & Director JNTUA OTPRI, Anantapur, Advisor: Dr.N.DEVENNA, Professor and Head of chemistry, JNTU Anatapuramu, Adviosor: Prof.B Syamasundar, Rtd. Professor of Chemistry, Acharya Nagarjuna University, Guntur, Former Vicechoncellor of Yogi Vemena University., and Adviosor: Dr. B. Mallikarjuna Rao, Vicepresident & Head Corporate Quality Control, Dr.Reddys Laboratories.
Phone: 9885282328
Address: Dr. M. Rameswara Rao,
Assistant Manager,
IT - Business Process Excellence
Dr.Reddy's Laboratories,
Hyderabad.
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n of our research on novel hydrazone derivatives derived from 2,5-
Difluorobenzoic acid, we intended to synthesize a series of new hydrazide derivatives with the aim of attaining promising
antimicrobial compounds to improve actual antimicrobial treatments
A simple and sensitive spectrophotometric method has been developed for determination of thorium (IV) using newly synthesized 3-methoxysalcilaldehyde-4-hydroxybenzoylhydrazone (MSHBH) reagent in a micellar medium of Triton X -100 (neutral surfactant). Thorium (IV) forms a yellow coloured water soluble complex with the reagent in acidic buffer medium pH 4.25. Beer’s law obeyed in the range 0.232 to 4.641 μg/ml of Th (IV) λmax at 394 nm. The molar absorptivity and Sandell’s sensitivity of coloured species are 2.0 x 104 l.mol-1.cm-1 and 0.012 μg/cm2 respectively. Thorium (IV) forms (M: L) 1:1 complex and stability constant of the complex is 1.95 x 105. The developed derivative spectrophotometric method was employed for the determination of thorium (IV) in monazite sand. "
n of our research on novel hydrazone derivatives derived from 2,5-
Difluorobenzoic acid, we intended to synthesize a series of new hydrazide derivatives with the aim of attaining promising
antimicrobial compounds to improve actual antimicrobial treatments
A simple and sensitive spectrophotometric method has been developed for determination of thorium (IV) using newly synthesized 3-methoxysalcilaldehyde-4-hydroxybenzoylhydrazone (MSHBH) reagent in a micellar medium of Triton X -100 (neutral surfactant). Thorium (IV) forms a yellow coloured water soluble complex with the reagent in acidic buffer medium pH 4.25. Beer’s law obeyed in the range 0.232 to 4.641 μg/ml of Th (IV) λmax at 394 nm. The molar absorptivity and Sandell’s sensitivity of coloured species are 2.0 x 104 l.mol-1.cm-1 and 0.012 μg/cm2 respectively. Thorium (IV) forms (M: L) 1:1 complex and stability constant of the complex is 1.95 x 105. The developed derivative spectrophotometric method was employed for the determination of thorium (IV) in monazite sand. "
Organic compounds containing different functional groups have been used as chromogenic reagents in the trace metal analysis. Survey of literature reveals that, the hydrazones are potential analytical reagents for the spectrophotometric determination of metal ions. In view of the above the author interested to synthesize new hydrazones viz. 3-methoxysalcilaldehyde-4-hydroxybenzoylhydrazone (MSHBH), 3,5-dimethoxy-4-hydroxybenzaldehydeisonicotinoyl hydrazone (DMHBIH), 2-hydroxy-3-methoxy benzaldehyde isonicotinoylhydrazone (HMBIH). The structure of the above ligands was confirmed by IR, NMR, mass and UV-Visible spectral data.
Spectrophotometry, a widely employed analytical technique is more popular because of the common availability of instrumentation and simple procedures as well as speed, precision and accuracy resulting in extensive literature being published every year.
All the above reagents forms water soluble complexes with palladium(II), thorium(IV), molybdenum(VI), ruthenium(III) and uranium(VI). The systematic study of the above metal ions was carried out and incorporated in this thesis.
The thesis consists of nine chapters; Chapter-1 describes the introduction, review of past work, objectives and importance of the present investigations.
Chapter -2 describes preparation of solutions, purification of solvents, solutions of various ions, a brief description of instruments employed in the present study and general experimental procedures of the investigation.
Chapter-3 contains synthesis and characterization of new organic reagents.
Chapter -4 deals with direct, first and second order derivative spectrophotometric determination of palladium(II), thorium(IV) and molybdenum(VI) using MSHBH reagent in presence of surfactant.
Chapter-5 describes the direct and derivative spectrophotometric determination of platinum group metals such as ruthenium(III) and palladium(II) using DMHBIH reagent in presence of Triton X-100.
Chapter-6 deals with direct, first and second order derivative spectrophotometric determination of uranium(VI) (radioactive element) using HMBIH reagent.
Chapter-7 describes the simultaneous determination of copper(II), nickel(II) and copper(II), cobalt(II) using MSHBH reagent in presence of micellar medium.
Chapter-8, 9 deals with the summary and conclusions of the present investigations.