Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic Compounds
Based on the hypothesis on the presence of double metal cyanides in the primordial oceans, a series of nano-sized metal(II) hexacyanocobaltate(III) (MHCCo) with the general formula: M3[Co(CN)6]2•xH2O (where M = Zn, Fe, Ni and Mn) has been synthesized. Surface interaction of aromatic amines, namely a...
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MDPI AG
2017-03-01
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| Series: | Inorganics |
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| Online Access: | http://www.mdpi.com/2304-6740/5/2/18 |
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| author | Rachana Sharma Md. Asif Iqubal Sohan Jheeta Kamaluddin |
| author_facet | Rachana Sharma Md. Asif Iqubal Sohan Jheeta Kamaluddin |
| author_sort | Rachana Sharma |
| collection | DOAJ |
| description | Based on the hypothesis on the presence of double metal cyanides in the primordial oceans, a series of nano-sized metal(II) hexacyanocobaltate(III) (MHCCo) with the general formula: M3[Co(CN)6]2•xH2O (where M = Zn, Fe, Ni and Mn) has been synthesized. Surface interaction of aromatic amines, namely aniline, 4-chloroaniline, 4-methylaniline and 4-methoxyaniline with MHCCo particles has been carried out at the concentration range of 100–400 μM at pH~7.0. The percentage binding of aromatic amines on MHCCo surface was found to be in the range of 84%–44%. The trend in adsorption was in accordance to the relative basicity of the studied amines. At the experimental pH, amines reacted rapidly with the surface of the iron(II) hexacyanocobaltate, producing colored products that were analyzed by Gas Chromatography Mass Spectroscopy (GC-MS). GC-MS analysis of the colored products demonstrated the formation of dimers of the studied aromatic amines. Surface interaction of aromatic amines with MHCCo was studied by Fourier Transform Infrared (FT-IR) spectroscopy and Field Emission Scanning Electron Microscopy (FE-SEM). The change in amine characteristic frequencies, as observed by FT-IR, suggests that interaction took place through the NH2 group on amines with metal ions of hexacyanocobaltate complexes. FE-SEM studies revealed the adherence of 4-methoxyaniline on zinc hexacyanocobaltate particles surface. We proposed that MHCCo might have been formed under the conditions on primitive Earth and may be regarded as an important candidate for concentrating organic molecules through the adsorption process. |
| first_indexed | 2024-04-12T19:43:21Z |
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| language | English |
| last_indexed | 2024-04-12T19:43:21Z |
| publishDate | 2017-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Inorganics |
| spelling | doaj.art-9deb2fc8faaa4ca3a8eb7ea2c2cefc752022-12-22T03:19:01ZengMDPI AGInorganics2304-67402017-03-01521810.3390/inorganics5020018inorganics5020018Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic CompoundsRachana Sharma0Md. Asif Iqubal1Sohan Jheeta2Kamaluddin3Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, IndiaDepartment of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, IndiaNetwork of Researchers on Horizontal Gene Transfer and Last Universal Common Ancestor, Leeds LS7 3RB, UKDepartment of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, IndiaBased on the hypothesis on the presence of double metal cyanides in the primordial oceans, a series of nano-sized metal(II) hexacyanocobaltate(III) (MHCCo) with the general formula: M3[Co(CN)6]2•xH2O (where M = Zn, Fe, Ni and Mn) has been synthesized. Surface interaction of aromatic amines, namely aniline, 4-chloroaniline, 4-methylaniline and 4-methoxyaniline with MHCCo particles has been carried out at the concentration range of 100–400 μM at pH~7.0. The percentage binding of aromatic amines on MHCCo surface was found to be in the range of 84%–44%. The trend in adsorption was in accordance to the relative basicity of the studied amines. At the experimental pH, amines reacted rapidly with the surface of the iron(II) hexacyanocobaltate, producing colored products that were analyzed by Gas Chromatography Mass Spectroscopy (GC-MS). GC-MS analysis of the colored products demonstrated the formation of dimers of the studied aromatic amines. Surface interaction of aromatic amines with MHCCo was studied by Fourier Transform Infrared (FT-IR) spectroscopy and Field Emission Scanning Electron Microscopy (FE-SEM). The change in amine characteristic frequencies, as observed by FT-IR, suggests that interaction took place through the NH2 group on amines with metal ions of hexacyanocobaltate complexes. FE-SEM studies revealed the adherence of 4-methoxyaniline on zinc hexacyanocobaltate particles surface. We proposed that MHCCo might have been formed under the conditions on primitive Earth and may be regarded as an important candidate for concentrating organic molecules through the adsorption process.http://www.mdpi.com/2304-6740/5/2/18metal hexacyanocobaltatearomatic aminesinteractionMHCCoFT-IRFE-SEMGC-MS |
| spellingShingle | Rachana Sharma Md. Asif Iqubal Sohan Jheeta Kamaluddin Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic Compounds Inorganics metal hexacyanocobaltate aromatic amines interaction MHCCo FT-IR FE-SEM GC-MS |
| title | Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic Compounds |
| title_full | Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic Compounds |
| title_fullStr | Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic Compounds |
| title_full_unstemmed | Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic Compounds |
| title_short | Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic Compounds |
| title_sort | adsorption and oxidation of aromatic amines on metal ii hexacyanocobaltate iii complexes implication for oligomerization of exotic aromatic compounds |
| topic | metal hexacyanocobaltate aromatic amines interaction MHCCo FT-IR FE-SEM GC-MS |
| url | http://www.mdpi.com/2304-6740/5/2/18 |
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