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Register a new userSynthesis of N2O2S2-Schiff base Ligand and Using it to Transport Cu2+ Through Bulk Liquid Membrane
اصطناع مرتبطة أساس شيف- N2O2S2 و استخدامه لنقل أيونات النحاس عبر الأغشية السائلة
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Damascus University ورقة بحثية
Publication date
2011
fields
Chemistry
and research's language is
العربية
Created by
Shamra Editor
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صنعنا أساس شيف (H2L) الذي يحتوي على ذرات أكسجين- كبريت – آزوت، و ذلك بتفاعل α.َα- بيس (5 -برومو-2 -فينوكسي كربوكسي الدهيد)1.4 -كسيلين مع أمينو ثيو فينول. درسنا إمكانية نقل أيون النحاس عبر غشاء من الكلورفورم الحاوي على حامل من مرتبطة أساس شيف المصنع من قبلنـا (H2L) . درست البارامترات المؤثرة في عملية النقل كتركيب الطور المـستقبل، و pH الوسـط للطـور المانح، و تركيز المادة الحاملة في الغشاء و تركيز EDTA في الطور المستقبل و تأثير درجـة الحـرارة و الزمن. وصلت كمية النحاس المنتقلة عبر الغشاء السائل بعد زمن 45 دقيقة إلى 100 % عنـد درجـة الحرارة 58 مئوية.
New Schiff base (H2L) containing nitrogen-sulfur-oxygen atoms was synthesized by reaction of α,α'-bis(5- Bromo-2-carboxyaldehyde phenoxy)-1.4- xylene with aminothiophenol. Transport of copper ion across a bulk chloroform membrane containing Schiff base ligand (H2L) as carrier has been studied. The parameters influencing the transport efficiency such as composition of receiving phase, pH of the feed phase, carrier concentration in the membrane, EDTA concentration in the receiving phase, effect of temperature and time dependency of the process were studied and discussed. The amount of copper transport through the liquid membrane after 48 min., arrived to 100% at temperature 58°C.
References used
Jonsson, J. A and Matiasson, L. (1992). Supported liquid membrane techniques for sample preparation and enrichment in environmental and biological analysis. TrAC, 11, 106
Safavi, A and shams, E. (1999). Selective transport of silver ions through bulk liquid membrane using Victoria blue as carrier . Talanta, 48, 1167
Chaudry, M. A. Amin, S. and Malik, M. T. (1996). Tri-n-octylamine- Xylene-Based Supported Liquid Membranes and Transport of Ce (IV) Ions Sep. Sci. Technol, 31, 1309
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In this research we have synthesized a new macrocyclic Schiff base
containing N2O5 donor atomes which was prepared by reaction of 1,7- bis (6-
methoxy - 2 - formyl phenyl)-1,4,7,10,13-penta oxa tridecane with 4',4- oxy
dianiline.
Separation with solvent extraction of Cu(II), Hg(II), and Cr(III) from
aqueous solution using the ligend (HL) as a new extractant has been studied.
The new acyclic Schiff Base (HL) was synthesized by reaction of 5-bromosalicylaldehyde
with 2-(2-Am
inoethyl)pyridine. The structure of the new
compound (HL) was confirmed by using FT-IR spectra, 1H-NMR and 13CNMR
spectra and mass spectra (MS). The effect of chloroform and
dichloromethan as organic solvents in the metal extractions was investigated at
20oC by using UV-visible Spectrometry. The influence of pH, ligand
concentration, shaking time and ratio of aqueous-to-organic phases on
extraction yield was tested at 20oC. The extractability of the tested metal ions
were evaluated.
A new acyclic Schiff Base(II), containing nitrogen-oxygen donor atoms was
synthesized by reaction of 1,2-Bis (5-bromo-2-formyl-phenoxy) ethane with 2-
(2-Aminoethyl)pyridine and characterized. The liquid-liquid extraction of
transition metals such
as Cu+2, Cr+3 and Uranyl-picrate (UO2)+2 from aqueous
phase to the organic phase was carried out using the novel ligand. The effect of
chloroform and nitrobenzene as organic solvents on the metal extractions was
investigated at 20oC by using Atomic Absorption and UV-visible
Spectrophotometry. The influence of pH, ligand concentration, ionic strength,
shaking time and ratio of aqueous-to-organic phases on extraction yield was
tested at 20oC. The extractability of the tested metal ions were valuated.
In this research we have synthesized a new macrocyclic Schiff base (II)
containing nitrogen- oxygen donor atoms which was designed and synthesized
by reaction of: 1,4– bis (6',6'- methoxy -3- formyl phenyl)-1,4- dioxa butane (I).
Identification of
this macrocyclic schiff base: (II) 1,16- Diaza–[3,6;11,14-di
(6',6'- methoxy phenyl)]-7,10,19,22 - tetraoxa cyclo tetra icozane-15,1dien was
determined by (LC-MS) and spectroscopy (IR). The liquid- liquid extraction of
metal such as Zn2+, Pb2+ and Ni2+ from aqueous phase to organic phase which
doesn't in water. The effect of chloroform and dichloromethane as organic
solvents over the metal extractions was investigated at 25± 0.10C by using
atomic absorption Spectrometer and extraction percentage was calculated.
This work was focused on the synthesis of tetradentate Schiff bases which
were prepared by condensation of salicylaldehyde with 1,4-diaminobenzene
and 1,3-diaminobenzene. The Schiff base ligands were checked by different
spectral technique (GC-MS,
1H-NMR, IR). The influences of shaking time on
the extraction of Cu (II) using solvent extraction technique was studied. Then
the Kinitic parameters were calculated from schemes which give best line
through drawing log (a-x) vs time or 1/(a-x) vs time or [Cu2+] vs time, whereas
(a-x) represents Cu(II) concentration in water phase and from it (n) reaction
order, (K) reaction rate constant (t1/2) reaction half between prepared ligand
and Cu (II) were calculated.
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