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Research Paper |
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Synthesis and structure elucidation of complexes of Co(III), Mn(III),and (Cu(II) from N, O donor ligand 2-[(2-hydroxyethylimino)ethyl]phenol or 2-[(2-hydroxyethylimino)methyl]phenol |
| Country |
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France |
| Authors |
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Momath Kebe || Amar Diop || Ibrahima Elhadji Thiam || Mbossé Ndiaye-Guéye || Pascal Retailleau || Simon Coles || James Orton || Mohamed Gaye |
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10.9790/5736-1407010116  |
Abstract: Analogous ligands derived from salicylaldehyde, 2-[(2-hydroxyethylimino)ethyl]phenol (H2L1) and 2-[(2-hydroxyethylimino)methyl]phenol (H2L2), have been synthetized and used to prepare three complexes in which the ligands acts in different fashions. Complexes formulated as [Co2(L1)2(OCH2CH2NH2)(SCN)].(CH3CH2OH) (1) , {[Mn(HL2)2].Cl.(H2O)}n (2), and {[Cu(L2)(NO3)]}n (3) were synthesized by mixing an equimolar amount of an ethanol solution containing Co(NO3)2.6H2O, MnCl2.4H2O or Cu(NO3)2.2H2O and an ethanol solution containing the appropriate ligand H2L1 or H2L2. In the dinuclear cobalt(III) complex 1, each of the two metal ions is coordinated by one monodeprotonated ligand molecule through three set donors.......
Keywords: Crystal structure; cobalt; manganese; copper; polymeric; octahedral
[1]. P. Bhowmik, S. Chatterjee, S. Chattopadhyay, Heterometallic inorganic–organic frameworks of sodium–nickel(vanen): Cation–π interaction, trigonal dodecahedral Na+ and unprecedented heptadentate coordination mode of vanen2−, Polyhedron, 2013, 63, 214–221.
[2]. P. Bhowmik, H.P. Nayek, M. Corbella, N. Aliaga-Alcalde, S. Chattopadhyay, Control of molecular architecture by steric factors: mononuclear vs polynuclear manganese(III) compounds with tetradentate N2O2 donor Schiff bases, Dalton Trans., 2011, 40, 7916–7926.
[3]. B. Iftikhar, K. Javed, M.S.U. Khan, Z. Akhter, B. Mirza, V. Mckee, Synthesis, characterization, and biological assay of Salicylaldehyde Schiff base Cu(II) complexes and their precursors, J. Mol. Struct., 2018, 1155, 337–348.
[4]. C. Liu, M.-X. Chen, M. Li, Synthesis, crystal structures, catalytic application and antibacterial activities of Cu(II) and Zn(II) complexes bearing salicylaldehyde-imine ligands, Inorg. Chim. Acta, 2020, 508, 119639.
[5]. Z. Qian, Y. Zhang, A.-Q. Jia, H.-T. Shi, Q.-F. Zhang, Syntheses, molecular structures, and spectroscopic properties of manganese(II)/(III) complexes with tetraphenylimidodiphosphinato and bi-pyridine or salicylaldehyde ligands, Inorg. Chim. Acta, 2020, 502, 119298.
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Research Paper |
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Synthesis of Electro-optic Conjugated Polymer of Carbazole Ring |
| Country |
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India |
| Authors |
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Dipak Kumar Mukhopadhyay |
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10.9790/5736-1407011721 |
Abstract: N-ethyl Carbazole was prepared by treating carbazole with ethyl iodide in presence of sodium hydride in the solvent medium of DMF. After subsequent addition of water N-ethyl carbazole was precipitated out.N-ethyl-3,6-diformyl carbazole was synthesized dy treating N-ethyl carbazole with high excess of pocl3 and DMF mixture .Then pure N-ethyl-3,6-diformyl carbazole was separated by flash chromatography on a silica gel column using ethylacetate /hexane (1:10) as eluent. N-ethyl-3,6-divinyl carbazole was synthesized by treating N-ethyl-3,6-diformyl carbazole withmethyltriphenylphosphonium iodide and sodium hydride in the solvent medium of DMSO firstly at 00 for 1h and then at room temperature for 30h. 1,4-dioctyloxy benzene was prepared by treating hydroquinone with.......
Keywords: N-ethyl-3,6-diformyl carbazole,N-ethyl-3,6-divinylcarbazole, 2,5-dioctyl oxy-1,4-diiodo benzene, conjugated polymer
[1]. Kippelen B, Tamura K, Peyhambarian N, Padias AB, Hall Jr. HK. Phys. Rev B 1993, 48 (15): 10710.
[2]. Yu L, Chan WK, Peng Z, Gharavi A. Acc. Chem. Res. 1996, 29:13.
[3]. Z hang Y, Wada T, wang L, Aoyama T, Sasabe H. Chem. Commun. 1996, 2325
[4]. Barrett C, Chowdhury B, Natansohn A, Rochon P. Macromolecules 1998, 31, 4845
[5]. Wright D, Diaz- Garcia MA, Casperson JD, DeClue M, Moerner WE, Twieg RJ. Appl. Phys. Lett. 1998, 73(11), 1490.
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Research Paper |
| Title |
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Adsorption Kinetics and Thermodynamic Studies of Zn(II) And Pb(II) ions by Biopolymeric Adsorbents obtained from Fish (Lates niloticus) Scale |
| Country |
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Nigeria |
| Authors |
: |
Okpaegbe, U.C || Maitera, O.N2, Milam, C || Azuaga, T.I |
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10.9790/5736-1407012233 |
Abstract: The adsorption of Zn(II) and Pb(II) ions from aqueous solution has been investigated using chitosan and its derivatives from fish scale Lates niloticus as a function of contact time, initial metal ion concentration, pH and temperature. Batch adsorption experiments were carried out to obtain optimum conditions for the removal of the metal ions. The optimum conditions obtained were 60 minutes contact time, initial ion concentration of 75 mg/L, and pH 7. The kinetics of adsorption was studied for the contact time range of 30-70 minutes. The results obtained showed that the adsorption of the metal ions could be described by both first and second order kinetic models with correlation coefficient (R2) values of 0.0003 and 1 for pseudo-first order and pseudo-second order for Zn2+adsorption; 0.4987 and 0.08707 for pseudo-first order and pseudo-second order respectively for Pb2+ adsorption. The free energy change (ΔG+) obtained at the optimal conditions is in the range of -4.567 to -28.919 for Zn2+and 0.223 to 1.535 for Pb2+. This result indicates that the adsorption process is spontaneous and thermodynamically favourable.
Keywords: Adsorption, kinetics, thermodynamics, biopolymeric, adsorbent, Lates niloticus
[1]. Ajay, K.A., Mehendra, S.K., Chandrashekhar, P.P., and Ishwardas, L.M. (2015). Kinetics study on adsorption of Ni2+ ions onto fly ash. Journal of Chemical Technology and Metallurgy, 50, 5,601-605.
[2]. Ashraf, S., Asthiani, F. Z., Kaghazchi, T. (2007) Equilibrium studies of the sorption of Hg(II) ions onto chitosan. Chemical Engineering Journal, 133, 311-316.
[3]. Fenglian, F., Wang, Q. (2011). Removal of heavy metal ions from wastewater. Journal of Environmental Management, 92, 407-418
[4]. Ho, Y.S., and G. Mckay. (1999a). A kinetic study of dye sorption by biosorbent waste product. Pith Resources Conservation Recycling, 25, 171–193.
[5]. Hudson, S.M., and Smith, C. (1998). Polysaccharide: Chitin and Chitosan: Chemistry and technology of their use as structural material. Biopolymers from renewal resource. New York: springer
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All notable changes of the PHP_CodeCoverage 2.2 release series are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
## [2.2.4] - 2015-10-06
### Fixed
* Fixed [#391](https://github.com/sebastianbergmann/php-code-coverage/pull/391): Missing `` tag
## [2.2.3] - 2015-09-14
### Fixed
* Fixed [#368](https://github.com/sebastianbergmann/php-code-coverage/pull/368): Blacklists and whitelists are not merged when merging data sets
* Fixed [#370](https://github.com/sebastianbergmann/php-code-coverage/issues/370): Confusing statistics for source file that declares a class without methods
* Fixed [#372](https://github.com/sebastianbergmann/php-code-coverage/pull/372): Nested classes and functions are not handled correctly
* Fixed [#382](https://github.com/sebastianbergmann/php-code-coverage/issues/382): Crap4J report generates incorrect XML logfile
## [2.2.2] - 2015-08-04
### Added
* Reintroduced the `PHP_CodeCoverage_Driver_HHVM` driver as an extension of `PHP_CodeCoverage_Driver_Xdebug` that does not use `xdebug_start_code_coverage()` with options not supported by HHVM
### Changed
* B
