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RISS 인기검색어
- 검색키워드
- 저자 : Minati Baral (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Potentially Multidentate Tripodal Amine Catechol Ligands as Chelators for Ga(III) and In(III)
Sahoo, Suban K.,Baral, Minati,Bera, Rati Kanta,Kanungo, B. K. Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.9
The binding abilities of two multidentate tripodal amine catechol ligands, cis,cis-1,3,5-tris[(2,3-dihydroxybenzylamino) aminomethyl]cyclohexane (TMACHCAT, $L^1)\;and\;N^1,N^3,N^5$-tris(2-(2,3-dihydroxybenzylamino) ethyl)cyclohexane-1,3,5-tricarboxamide (CYCOENCAT, $L^2$) with Ga(III) and In(III) have been investigated by potentiometric and spectrophotometric methods in an aqueous medium of 0.1 M KCl at 25 ${\pm}\;1\;{^{\circ}C}.$ The ligands $L^1\;and\;L^2$ formed various monomeric species $MLH_3,\;MLH_2$, MLH and ML (M = $Ga^{+3}\;and\;In^{+3}$) and showed potential to form strong encapsulated tris(catechol) type complexes. The coordination modes, binding ability and selectivity of the ligands towards Ga(III) and In(III) have been discussed with the help of experimental evidences, and supported with molecular modeling calculations.
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Potentially Multidentate Tripodal Amine Catechol Ligands as Chelators for Ga(III) and In(III)
Suban K. Sahoo,Minati Baral,Rati Kanta Bera,B. K. Kanungo 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.9
The binding abilities of two multidentate tripodal amine catechol ligands, cis,cis-1,3,5-tris[(2,3-dihydroxybenzylamino) aminomethyl]cyclohexane (TMACHCAT, L1) and N1,N3,N5-tris(2-(2,3-dihydroxybenzylamino) ethyl)cyclohexane-1,3,5-tricarboxamide (CYCOENCAT, L2) with Ga(III) and In(III) have been investigated by potentiometric and spectrophotometric methods in an aqueous medium of 0.1 M KCl at 25 ± 1 °C . The ligands L1 and L2 formed various monomeric species MLH3, MLH2, MLH and ML (M = Ga+3 and In+3) and showed potential to form strong encapsulated tris(catechol) type complexes. The coordination modes, binding ability and selectivity of the ligands towards Ga(III) and In(III) have been discussed with the help of experimental evidences, and supported with molecular modeling calculations.
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A Novel Iron(III) Selective Membrane Electrode Containing a Tripodal Polycatacholamine as Sensor
Bera, Rati Kanta,Sahoo, Suban K,Baral, Minati,Kanungo, B.K. Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.10
A novel poly(vinylchloride)-based membrane sensor using $N^1$,$N^3$,$N^5$-tris(2-(2,3-dihydroxybenzylamino)-ethyl)cyclohexane-1,3,5-tricarboxamide (CYCOENCAT, L) as ionophore has been prepared and explored as $Fe^{3+}$ selective electrode. The membrane electrode composed of ionophore, poly(vinylchloride) and o-nitropheyloctyl ether in the optimum ratio 4:33:63 gave excellent potentiometric response characteristics, and displayed a linear log[$Fe^{3+}$] versus EMF response over a wide concentration range of $1.0{\times}10^{-5}-1.0{\times}10^{-1}$ M with super nernstian slope of 28.0 mV/decade and the detection limit of $8.0{\times}10^{-6}$ M. The proposed ion selective electrode showed fast response time (< 15 s), wide pH range (3.0-7.0), high non-aqueous tolerance (up to 20%) and adequate long life time (120 days). It also exhibited very good selectivity for $Fe^{3+}$ relative to a wide variety of alkali, alkaline earth, transition and heavy metal ions. Further, the analytical applicability of the sensor was tested as an indicator electrode in the potentiometric titration of $Fe^{3+}$ with EDTA.
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Novel Iron(III) Selective Membrane Electrode Containing a Tripodal Polycatacholamine as Sensor
Rati Kanta Bera,Suban K Sahoo,Minati Baral,B. K. Kanungo 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.10
A novel poly(vinylchloride)-based membrane sensor using N^1,N^3,N^5-tris(2-(2,3-dihydroxybenzylamino)-ethyl)cyclohexane-1,3,5-tricarboxamide (CYCOENCAT, L) as ionophore has been prepared and explored as Fe^(3+) selective electrode. The membrane electrode composed of ionophore, poly(vinylchloride) and o-nitropheyloctyl ether in the optimum ratio 4:33:63 gave excellent potentiometric response characteristics, and displayed a linear log[Fe^(3+)] versus EMF response over a wide concentration range of 1.0 × 10^(−5) - 1.0 × 10^(−1) M with super nernstian slope of 28.0 mV/decade and the detection limit of 8.0 × 10^(−6) M. The proposed ion selective electrode showed fast response time (< 15 s), wide pH range (3.0-7.0), high non-aqueous tolerance (up to 20%) and adequate long life time (120 days). It also exhibited very good selectivity for Fe^(3+) relative to a wide variety of alkali, alkaline earth, transition and heavy metal ions. Further, the analytical applicability of the sensor was tested as an indicator electrode in the potentiometric titration of Fe^(3+) with EDTA.
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