February2009.pdf

J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 121-126
Synthesis and characterization of UO VI, ZrO IV and VO IV complexes
with Schiff base macrocyclic tetradentate ligand and their derivatives
with chloroacetic acid
D. C. Dash*, R. K. Mohapatra, (Ms.) S. Ghosh and (Mrs.) P. Naik
P. G. Department of Chemistry, Sambalpur University, Jyoti Vihar, Burla, Sambalpur-768 019, Orissa, India Manuscript received 28 January 2008, revised 22 September 2008, accepted 25 September 2008 Abstract : A series of complexes of the type [M(L)(NO ) ].mH O and [VO(L)(SO )].2H O, where L is a Schiff base
"2,3,5,6,10,11,13,14-octaaza-1,7,9,15-tetramethyl-l,6,9,14-cyclohexadecatetraene-4,12-dithione" derived from
thiocarbo-hydrazide and acetylacetone have been synthesized. Reaction of these complexes with monochloroacetic
acid yielded another series of complexes of the type [M(L')(NO ) ].mH O and [VO(L')(SO )].2H O, where L' is
another Schiff base "4 -oxo-2,3,4,5-tetrahydrothiazolo[2,3-b]-2',3',5',6',10',11',13',14'-octaaza-1',7',9',15'-tetramethyl-
1',4',6',9',14'-cyclohexadecapentaene-12'-thione" obtained after cyclization with chloroacetic acid, where M = UO VI
and ZrOIV; m = 2 and 3. All the complexes are characterized on the basis of elemental analysis, thermal analysis,
molar conductivity, magnetic moment, electronic, infrared, 1H NMR and ESR spectral studies. The results indicate
that the VOIV ion is penta coordinated yielding paramagnetic complexes where as UO VI, ZrOIV ions are hexa co -
ordinated yielding diamagnetic complexes of above stoichiometry.
Keywords : Schiff base, electronic, infrared spectra, ESR spectra, 1H NMR spectra.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 127-132
Synthetic, spectral and antimicrobial activity studies of first row
transition metal complexes derived from lansoprazole drug
M. Revanasiddappaa, C. Basavarajab, T. Sureshc* and S. D. Angadid
aDepartment of Chemistry, PES School of Engineering, Bangalore-560 100, India
bDepartment of Chemistry, Inje University, Kimhae 621749, South Korea
cDepartment of Chemistry, Gulbarga University P. G. Center, Bellary-583 104, Karnataka, India
dDepartment of Studies in Chemistry, Gulbarga University, Gulbarga-585 106, Karnataka, India
Manuscript received 22 May 2008, accepted 25 September 2008 Abstract : Transition metal complexes of ZrOII, VOII, Mn II, Fe III, CoII, Ni II, CuII, Zn II, CdII and HgII have been
synthesized with lansoprazole drug, that is 2-{3-methyl-4-(2,2,2-trifluoroethane)-2-pyridyl)methyl}sulphonyl
benzimidazole. Elemental analysis suggest that these metal ions forms ML Cl stoichiometry for Mn II, Fe III, CoII, NiII,
CuII, Zn II, CdII and HgII and ML (metal-ligand) stoichiometry for ZrO II and VOII. These complexes are non-
electrolytic in nature. The ligand behaves as bidentate ON donor and forms coordinate bonds through C=N and S=O
groups. Magnetic susceptibility, IR, UV-Visible and ESR spectral studies suggest that MnII, FeIII, CoII, Ni II, CuII, ZnII,
CdII and HgII complexes posses octahedral geometry, whereas, ZrOII and VOII exhibit square pyramidal geometry.
The ligand and its complexes were tested for their antimicrobial activity against Klebsiella, Pseudomonas arginousa,
Aspergillus niger and Aspergillus flavous.
Keywords : Lansoprazole, antimicrobial activity, electrical conductivity, transition metal complexes, ESR.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 133-138
Synthesis, spectral and thermal studies of copper(II) complexes of
azodyes derived from 2,3-dimethyl-1-phenyl-4-amino-5-pyrazolone
M. L. Hari Kumaran Nair* and L. Shamla
Department of Chemistry, University College, Thiruvananthapuram-695 034, Kerala, India Manuscript received 11 January 2008, revised 14 July 2008, accepted 21 October 2008 Abstract : Some novel metal complexes of copper(II) with azodyes derived from 4-aminoantipyrine and p-
bromophenol have been synthesized and characterized by elemental analysis, IR, UV-Visible and ESR spectra,
thermal studies, magnetic and conductance measurements. The X-ray diffraction patterns of the complex
[Cu(PBPAAP)(NCS)(Cl)] (where PBPAAP = parabromophenolazoantipyrine) have been examined and were indexed.
The results show that the complex belongs to the orthorhombic crystal system with unit cell dimensions : a = 7.21 Å, b
= 9.77 Å and c = 12.65 Å. The ligands are found to behave in a neutral bidentate manner. The X-band ESR spectra of
the complex [Cu(PBPAAP)(CH COO) ] shows an axial ligand field symmetry. All the complexes show square planar
geometry with magnetic moments ranging from 1.79 to 1.85 B.M.
Keywords : CuII, azodyes, thermal studies.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 139-142
Cyclic voltammetric and spectral studies of some mixed-ligand
copper(II) complexes involving 2,2´-bipyridine/l,10-phenanthroline
and amino acids
Krishna Srivastava*, Nutan Singh, Ashish Kumar Srivastava and Jagdish Prasad
Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar Pradesh, India E-mail : [email protected]; [email protected] Manuscript received 10 September 2007, revised 24 October 2008, accepted 27 October 2008 Abstract : Cyclic voltammetric and electronic spectral studies of some mixed ligand copper(II) complexes, viz.
[Cu(bipy)(glu)], 1; [Cu(bipy)(tyro)]Cl, 2; [Cu(phen)(asp)], 3; [Cu(phen)(glu)].2H O, 4 and [Cu(phen)(tyro)]Cl.H O, 5
(where, bipy = 2,2′-bipyridine, phen = 1,10-phenanthroline, asp = L-aspartate dianion, glu = L-glutamate dianion and
tyro = L-tyrosinate anion) have been studied in aqueous medium at pH 5.0. All these complexes displayed a single-
electron redox couple (Cu2+/+) in the potential range +1000 to –400 mV vs Ag/AgCl. The cathodic peak potential shifts
positively with increasing scan rate (ν) and peak current ratio (I /I ) is greater than 1.0, representing a decrease in
dissolved CuI species near the electrode surface because of weak adsorption of the reduced species at the surface of
working electrode in the case of phen mixed ligand complexes, 3 to 5. It is important to note that for a given amino
acid, the reduction potential (E ) of these mixed ligand CuII complexes is less negative for the phen complex than the
bipy complex (1 vs 4 and 2 vs 5), owing to the stronger π-acceptor character of phen over bipy.
Keywords : Electrochemistry, cyclic voltammetry, bipyridine, phenanthroline, mixed ligand CuII complexes, amino acids.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 143-148
Synthesis and characterization of mixed ligand complexes of zinc and
cadmium ions with some nitrogen and sulphur donors
M. K. Singh*, A. Das, R. Laskar and B. Paul
Department of Chemistry, Tripura University, Suryamaninagar-799 130, Tripura, India E-mail : [email protected] Manuscript received 8 September 2008, accepted 16 September 2008 Abstract : Mixed ligand complexes of Zn II and CdII ions with l-cyano-l-carboethoxyethylene-2,2-dithiolate [CED2–,
{S C= C(CN)(COOC H )}2–] as a primary ligand and o-phenylenediamine (OPD), pyridine (py), α-picoline (α-pic), β-
picoline (α-pic) or γ-picoline (γ-pic) as secondary ligands have been synthesized and characterized on the basis of
analytical data, molar conductance, infrared and 1H NMR spectral studies. The molar conductance data re veal that
all the complexes have non-electrolytic nature in DMF solution. Infrared spectral studies suggest bidentate chelating
behaviour of CED2– ion and OPD while other nitrogen donors show unidentate behaviour in its complexes.
Keywords : Mixed ligand complex, cadmium, zinc.

J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 149-152
Synthesis and fungicidal activity of 4,4′-bis[2′′-(aryl/alkylimino)-4′′-
oxothiazolin-3′′-yl-acetamidoxy)bibenzyls and 4,4′-
bis(oxadiazolylmethoxy)bibenzyls
I. R. Siddiquia* and Smriti Dwivedib
aLaboratory of Green Technology, Department of Chemistry, Allahabad University, Allahabad-211 002, bGalgotia College of Engineering & Technology, Knowledge Park, Geater Noida, Uttar Pradesh, India Manuscript received 2 February 2007, revised 11 July 2008, acepted 24 September 2008 Abstract : Chemoselecti ve facile synthesis of novel 4,4′-bis[2′′-(aryl/alkylimino)-4′′-oxothiazolin-3′′-ylacetamidoxy]-
bibenzyls (5a-e) and 4,4′-bis(oxadiazolylmethoxy)bibenzyls (6a-e) are reported. Cycloaddition of chloroacetic acid on
1,2-bis[4-(2-oxo-substituted-2-thiosemicarbazinoethoxy)phenyl]ethane (4a-e) yielded (5a-e) and cyclisation of (4a-e) in
presence of iodine in Kl gave (6a-e). These compounds have been evaluated for their antifungal activity.
Keywords : Bibenzyl, bryophytes, anticonvulsant, thiosemicarbazides, Aspergillus niger, Fusarium oxysporum.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 153-161
Synthesis of tetraaza macrocyclic PdII complexes; antibacterial and
catalytic studies
K. Shankera, R. Rohinia, K. Shravankumara, P. Muralidhar Reddyb, Yen-Peng Hob and V.
Ravindera*
aDepartment of Chemistry, Kakatiya University, Warangal-506 009, Andhra Prasesh, India E-mail : [email protected] bDepartment of Chemistry, National Dong Hwa University, Hualien, Taiwan Manuscript received 25 January 2008, revised 11 September 2008, accepted 16 September 2008 Abstract : A series of new Schiff base PdII complexes of the type [Pd(L)]X [where, L = HBOADO, TBACD, OBACD,
HBOADT, DBACDT, TBAHD and X = Cl–] have been synthesized by non-template method. The complexes were
characterized with the help of elemental analyses, conductance measurements, magnetic measurements, infrared,
NMR (1H, 13C), mass, electronic spectral studies and thermal analysis. Based on the spectral data, square-planar
geometry is tentatively proposed to all the complexes. The biological activities of these complexes have been tested in
vitro to evaluate their activity against Gram +ve and Gram –ve bacteria and were found to be more active than
streptomycin and ampicillin. [Pd(HBOADO)]Cl and [Pd(OBACD)]Cl complexes were studied on the catalytic
reduction reactions of 2-nitroanisole, 3-nitroanisole, 4-nitroanisole, 2-nitrobenzoicacid, 3-nitrobenzoicacid, 4-
nitrobenzoicacid under mild conditions. The reduced products were treated with nitrous acid followed by β-naphthol
and the developed colored products were determined spectrophotometrically. [Pd(HBOADO)]Cl is found to be more
efficient than [Pd(OBACD)]Cl .
Keywords : Synthesis, macrocyclic, palladium(II), antibacterial, catalytic studies.

J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 162-165
Spectrophotometric determination of mercury(II) in water, soil and
biological samples using heterocyclic thiosemicarbazones
K. Vasudeva Reddy, S. Vidyasagar Babu and K. Hussain Reddy*
Department of Chemistry, Sri Krishnadevaraya University, Anantapur-515 003, Andhra Pradesh, India E-mail : [email protected] Manuscript received 17 June 2008, revised 23 October 2008, accepted 23 October 2008 Abstract : Analytical applications of 2-acetylpyridine-4-methyl-3-thiosemicarbazone (APMT) and 2-acetylfuran
thiosemi-carbazone (AFT) are reported for the first time. The reagents have been synthesized and characterized using
IR and NMR spectral data. APMT and AFT have been used for the spectrophotometric determination of mercury(II).
The reagents give yellow colour with mercury(II) in sodium acetate -acetic acids buffers. Many cations and anions do
not interfere in the determination of mercury. The methods were successfully applied to a number of water (potable
and polluted), biological and soil samples containing mercury(II). The results of the proposed method in the analysis of
samples are comparable with those obtained by dithizone method. The methods have high precision and accuracy (s =
0.007 and 0.018 for 4 µg/mL in APMT and AFT methods respectively).
Keywords : Spectrophotometry, mercury determination, heterocyclic thiosemicarbazones, environmental, biological
and soil samples.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 166-167
Chemical equilibrium studies on some bivalent transition metal
chelates of biologically active molecules (drugs)
V. T. Chaudharia and Mazahar Farooquib*
aS.S.M.M. Arts, Science & Commerce College, Pachora, Dist. Jalgaon, Maharashtra, India bAurangabad College for Women, Navkhanda, Aurangabad, Maharashtra, India E-mail : [email protected] Manuscript received 27 May 2008, revised 22 September 2008, accepted 25 September 2008 Abstract : Stability constants of metal chelates of dicyclomine hydrochloride (dcm), metformin hydrochloride (mfm)
drugs with the CoII, Ni II and Cu II transition metal ions have been evaluated pH metrically in aqueous solution at 25 oC
and 0.1 M (NaClO ) fixed ionic strength. Proton ligand stability constant and metal ligand stability constant were
determined by Calvin-Bjerrum pH titration techniques as modified by Irving and Rossotti.
Keywords : Transition metal complex, stability constant, ligand.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 168-170
Formation constants and thermodynamic parameters of some tri-
ligand complexes of lanthanides
S. S. Yadav* and R. S. Saxena
Department of Chemistry, Government Raza P.G. College, Rampur-244 901, Uttar Pradesh, India Manuscript received 30 June 2008, revised 15 October 2008, accepted 23 October 2008 Abstract : Potentiometric evidences have been cited for the formation of 1 : 1 : 1 : 1; MLL′L″ quaternary complexs
[MIII = LaIII, PrIII and NdIII, L = ethyleneglycol-bis(β-aminoethylether)-N,N,N′,N′-tetraacetic acid (EGTA), L′ =
pyridine-2,6-dicarboxylic acid (PDA) and L″ = 2,2′-dithiodisalicylic acid (DTSA)] have been studied
potentiometrically with a view to determine their formation constants, thermodynamic parameters and to explore and
confirm the possibility of their expanded coordination number. The formation constants log KMLL′, log KMLL″ and log
K
) and different
MLL′ L″ for the resulting ternary and quate rnary complexes at constant ionic strength (µ = 0.05 KNO3
temperatures (15 ± 0.1 ºC, 25 ± 0.1 ºC, 35 ± 0.1 ºC and 45 ± 0.1 ºC have been evaluated. The order of formation
constants with respect to LnIII ions has been found to be LaIII < PrIII < NaIII for both ternary and quaternary complexes
whereas ternary < quaternary for mixed-ligand complexes.
Keywords : Stability constant, lanthanides, ternary complexes, quaternary complexes.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 171-173
The comparative studies of micellization and electrolytic behaviour of
dysprosium soaps in methanol
S. K. Upadhyaya, R. K. Shuklaa, M. Shuklab, N. Guptaa and Govind Sharmaa*
aFaculty of Engineering & Technology, R. B. S. College (Bichpuri Campus), Agra-283 105, Uttar Pradesh, India E-mail : sanjay–[email protected], [email protected] bAgra College, Agra-282 002, Uttar Pradesh, India Manuscript received 23 April 2008, revised 15 October 2008, accepted 23 October 2008 Abstract : Dysprosium butyrate, valerate, myristate and stearate behave as weak electrolyte in dilute solutions. The
critical micelle concentrations (CMC) of dysprosium soaps in methanol have been determined by conductometric
measurement. The value of CMC decreases with increasing chain length of fatty acid component. The molar
conductances at infinite dilution and degree of ionization have been evaluated.
Keywords : Dysprosium soaps, weak electrolyte, conductivity, critical micelle concentration.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 174-176
Voltammetric study of copper(I)-thiuram disulphide reaction and its
application to the determination of thiuram disulphides
D. K. Sharma*, Atul Gupta, Rajender Kashyap and R. K. Sharma
Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla-171 005, Himachal Pradesh, India E-mail : [email protected] Manuscript received 22 May 2008, revised 26 September 2008, accepted 23 October 2008 Abstract : The reaction between thiuram disulphide and copper(I) perchlorate (1 : 1 molar ratio) in acetonitrile has
been investigated voltammetrically with a view to arrive at a convincing mechanism of this reaction. The cyclic
voltammetric study of this reaction showed the formation of a new product most plausibly copper(III)
dithiocarbamate complex. Prompted by the observation that the new complex afforded analytically useful diffusion-
controlled peaks at –85 to –120 mV (vs SCE) in differential pulse polarography, a new method has been developed for
the microdetermination of thiuram disulphides.
Keywords : Thiuram disulphides, copper(I) perchlorate, cyclic voltammetry, pulse polarography.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 177-178

Flavonoids of Zizyphus rugosa
A. Singha, M. B. Pandeya, Sarita Singhb, A. K. Singhb* and J. P. Singha
aDepartment of Chemistry, S.G.R. Post Graduate College, (Purvanchal University, Jaunpur), Dobhi-222 149, Uttar Pradesh, India bDepartment of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh, India E-mail : [email protected], Fax : 91-542-2367568 Manuscript received 28 May 2008, accepted 17 September 2008 Abstract : Three flavonoids – kaempferol-4′-methylether, luteolin and luteolin-7-O-glucoside have been isolated from
the barks of Zizyphus rugosa and their structures were established by spectral evidences. This is the first report of
these flavonoids from Z. rugosa.
Keywords : Zizyphus rugosa, flavonoids.

J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 179-182
Chemoselective acylation of amines, thiols and phenols using 2,4,6-
triacyloxy-l,3,5-triazine (TAT) as a new and effective reagent under
mild condition
Somnath S. Gholapa*, Ganesh B. Tambe a and Charansingh H. Gillb
aPost Graduate Department and Research Centre, P. V. P. College, Pravaranagar (Loni Kd.), Ahmednagar-413 713, Maharashtra, India bDepartment of Chemistry Dr. Babasaheb Ambedkar Marathwada University, Aurangabad-431 004, Maharashtra, India Manuscript received 14 November 2007, revised 30 June 2008, accepted 24 September 2008 Abstract : A facile chemoselective acylation of amines, thiols and phenols using 2,4,6-triacyloxy-l,3,5-triazine (TAT)
under mild condition is described. New reagent, high product yield, short reaction time, ease of operation and solvent
free reaction condition is the most acceptable feature of the present method.
Keywords : Thiol, phenol, amine, acylation, chemoselective.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 183-185
Structural elucidations in flavones using 1H NMR 3-oxygenation shifts
Suraj B. Kalidhar
Department of Chemistry, Haryana Agricultural University, Hisar-125 004, Haryana, India Manuscript received 9 April 2008, revised 2 September 2008, accepted 21 October 2008 Abstract : A comparison of 1H NMR (CDCl ) of 3-acetoxyflavone with that of corresponding 3-deacetoxyflavone
shows that the H-2′ and H-6′ of the both have comparable δ values. The observation is useful for structural studies in
naturally occurring flavones.
Keywords : Flavones, 1H NMR, oxygenation.

J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 186-191
Synthesis, antitubercular and antimicrobial activity of some new N-
aryl-1,4-dihydropyridines containing furan nucleus
S. V. Rokad, S. D. Tala, J. D. Akbari, M. F. Dhaduk and H. S. Joshi*
Department of Chemistry, Saurashtra University, Rajkot-360 005, Gujarat, India Manuscript received 27 August 2008, accepted 21 October 2008 Abstract : A wide range of biological activities are associated with 1,4-dihydropyridines individually or in
combination. The synthesis of N-aryl-2,6-dimethyl-3,5-dicarbmethoxy-4-[5′-(m-chloro-p-flourophenyl)-2′-furyl]-1,4-
dihydropyridines (6a-j) and N-aryl-2,6-dimethyl-3,5-dicarbmethoxy-4-[5′-(m-chloro-p-flourophenyl)-2′-furyl]-1,4-
dihydropyridines (7a-j) was under-taken with hope that they may be biologically active molecules with improved
activity, less toxicity and undesirable side effects. The newly synthesized compounds were characterized on the basis
of elemental analysis, IR, 1H NMR and mass spectral data. All newly synthesized compounds were tested for their
antitubercular activity against Mycobacterium tuberculosis H RV ATCC 27294, antibacterial activity against
different Gram +ve and Gram –ve bacteria and antifungal activity.
Keywords : N-Aryl-1,4-dihydropyridines, antitubercular activity, antimicrobial activity.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 192-194
Standardisation of Fenugreek extract using 4-hydroxyisoleucine as a
marker compound
Atul N. Bedekar*, Abhinay Pise, Adesh Naik and Paresh Bhosale
Department of Chemistry, B. N. Bandodkar College of Science, Thane-400 601, Maharashtra, India Manuscript received 20 December 2005, revised 7 August 2006, accepted 23 October 2008 Abstract : 4-Hydroxyisoleucine is reported as bioactive compound, which is responsible for antidiabetic activity of
Fenugreek. Our present work includes standardization and preparation of different extracts, which are enriched with
4-hydroxyisoleucine. The paper includes some unexpected observation in extraction pattern of 4-hydroxyisoleucine
with different solvents. The quantitative estimation of 4-hydroxyisoleucine is done by spectrophotometry on the basis
of its reaction with ninhydrin.
Keywords : 4-Hydroxyisoleucine, antidiabetic, herbal, extraction, HPTLC, spectrophotometry.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 195-198
Evaluation of antimicrobial and diuretic activities of some new
synthesized : 5-(substituted arylidenes)-2-(substituted aryl)-3-(4-
nitrophenoxy acetamido)-4-oxo-thiazolidines derivatives
R. Yadav*, D. K. Raikwar and S. K. Srivastava
Department of Chemistry Dr. H. S. Gour University, Sagar-470 003, Madhya Pradesh, India E-mail : [email protected] Manuscript received 21 February 2008, revised 6 August 2008, accepted 24 September 2008 Abstract : Twenty seven new arylidino phenoxy acetamido 4-oxo-thiazolidine derivatives were synthesized and
evaluated for their antimicrobial and diuretic activities. The structures of all newly synthesized compounds have been
determined by elemental analysis, IR, 1H NMR and mass spectroscopic techniques. Some of the compounds shows
good pharmacological results.
Keywords : Antimicrobial, diuretic, nitrophenoxy acetamido thiazolidines.
J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 199-201
Arid zone pla nts as natural antioxidant agents
Satish C. Jain*, Renuka Jaina and Renu Singh
Medicinal Plants and Biotechnology Laboratory, Department of Botany, University of Rajasthan, Jaipur-302 004, Rajasthan, India E-mail : [email protected] aDepartment of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India Manuscript received 12 May 2008, accepted 16 September 2008 Abstract : Methanol and dichloromethane extracts of flowers for total phenolic content along with antioxidant
potential were examined using 2,2′-diphenyl-1-picrylhydrazyl radical (DPPH) solution-based chemical assay of 15
medicinally important arid zone plants. The results showed that of all these extracts, highest total phenolic content
was observed in Acacia nilotica (58.60 ± 0.40 GAE/100 g FW) followed by Tephrosia hamiltonii (52.00 ± 0.41 GAE/100
g FW). Likewise, each studied extract demonstrated potential antioxidant activity but the highest activity was
recorded in dichloromethane extract of T. hamiltonii (RC = 5.5 µg/ml) and in methanol extract of Calotropis procera
(RC = 4.5 µg/ml). All the arid zone plants selected in this study exhibited stronger antioxidant activity and
significantly higher levels of total phenolics, which may prove to be potential natural sources of potent antioxidant and
beneficial chemopreventive agents.
Keywords : Arid zone plants, total phenolics, antioxidant agents.

J. Indian Chem. Soc.,
Vol. 86, February 2009, pp. 202-204
In vitro antioxidative property of polyphenols present in two common
aquatic leafy vegetables
Bidisha Mallicka, Pubali Dharb and Santinath Ghoshc*
aDepartment of Botany, Lady Brabourne College, P-l/2, Suhrawardy Avenue, Kolkata-700 017, India bDepartment of Physiology, Hooghly Mohsin College, Chinsurah, Hooghly, West Bengal, India cDepartment of Chemical Technology, University College of Science and Technology, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata-700 009, India E-mail : [email protected] Fax : 91-33-23519755 Manuscript received 25 June 2008, accepted 16 September 2008 Abstract : Enydra fluctuans Lour. (Hinche or helencha) and Ipomea aquatica Forssk. (Kalmisak) are traditionally
consumed as leafy vegetables by the Indians. But little is known about its potential as sources of antioxidants. The
80% methanol extraction of these two vegetables showed the polyphenol content of 30.7 and 18.42 mg per g of dry
matter. Both the extracts have shown reducing activity, DPPH radical scavenging activity and prolonged ABTS• +
radical scavenging activity. The result of the study indicates that the above vegetables are rich in active polyphenolic
antioxidants, which are very much important from nutritional point of view.
Keywords : Enydra fluctuans, Ipomea aquatica, polyphenol, antioxidant.

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