Please use this identifier to cite or link to this item:
https://open.uns.ac.rs/handle/123456789/1156
DC Field | Value | Language |
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dc.contributor.author | Sajó I. | en_US |
dc.contributor.author | Bakos L. | en_US |
dc.contributor.author | Szilágyi I. | en_US |
dc.contributor.author | Lendvay G. | en_US |
dc.contributor.author | Magyari, József | en_US |
dc.contributor.author | Mohai M. | en_US |
dc.contributor.author | Szegedi Á. | en_US |
dc.contributor.author | Farkas A. | en_US |
dc.contributor.author | Jánosity A. | en_US |
dc.contributor.author | Klébert S. | en_US |
dc.contributor.author | Kótai L. | en_US |
dc.date.accessioned | 2019-09-23T10:13:55Z | - |
dc.date.available | 2019-09-23T10:13:55Z | - |
dc.date.issued | 2018-11-05 | - |
dc.identifier.issn | 00201669 | en_US |
dc.identifier.uri | https://open.uns.ac.rs/handle/123456789/1156 | - |
dc.description.abstract | Copyright © 2018 American Chemical Society. [NH4Cu(OH)MoO4] as active photocatalyst in the decomposition of Congo Red when irradiated by UV or visible light has been prepared in an unusual ammonia/water ligand exchange reaction of [tetraamminecopper(II)] molybdate, [Cu(NH3)4]MoO4. [Cu(NH3)4]MoO4 was subjected to moisture of open air at room temperature. Light blue orthorhombic [Cu(NH3)(H2O)3]MoO4 was formed in 2 days as a result of an unexpected solid/gas phase ammonia-water ligand exchange reaction. This complex does not lose its last ammonia ligand on further standing in open air; however, a slow quasi-intramolecular (self)-protonation reaction takes place in 2-4 weeks, producing a yellowish-green microcrystalline material, which has been identified as a new compound, [NH4Cu(OH)MoO4], (a = 10,5306 Å, b = 6.0871 Å, c = 8.0148 Å, β = 64,153°, C2, Z = 4). Mechanisms are proposed for both the sequential ligand exchange and the self-protonation reactions supported by ab initio quantum-chemical calculations and deuteration experiments as well. The [Cu(NH3)(H2O)3]MoO4 intermediate transforms into NH4Cu(OH)(H2O)2MoO4, which loses two waters and yields [NH4Cu(OH)MoO4]. Upon heating, both [Cu(NH3)4]MoO4 and [Cu(NH3)(H2O)3]MoO4 decompose, losing three NH3 and three H2O ligands, respectively, and stable [Cu(NH3)MoO4] is formed from both. The latter can partially be hydrated in boiling water into [NH4Cu(OH)MoO4. This compound can also be prepared in pure form by boiling the saturated aqueous solution of [Cu(NH3)4]MoO4. All properties of [NH4Cu(OH)MoO4] match those of the active photocatalyst described earlier in the literature under the formulas (NH4)2[Cu(MoO4)2] and (NH4)2Cu4(NH3)3Mo5O20. | en |
dc.relation.ispartof | Inorganic Chemistry | en |
dc.title | Unexpected Sequential NH3/H2O Solid/Gas Phase Ligand Exchange and Quasi-Intramolecular Self-Protonation Yield [NH4Cu(OH)MoO4], a Photocatalyst Misidentified before as (NH4)2Cu(MoO4)2 | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.doi | 10.1021/acs.inorgchem.8b02261 | - |
dc.identifier.scopus | 2-s2.0-85055126427 | - |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85055126427 | - |
dc.description.version | Unknown | en_US |
dc.relation.lastpage | 13692 | en |
dc.relation.firstpage | 13679 | en |
dc.relation.issue | 21 | en |
dc.relation.volume | 57 | en |
item.grantfulltext | none | - |
item.fulltext | No Fulltext | - |
Appears in Collections: | PMF Publikacije/Publications |
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