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Cu(II)-amino acid–CaAl-layered double hydroxide complexes, recyclable, efficient catalysts in various oxidative transformations

Varga, Gábor; Ziegenheim, Szilveszter; Muráth, Szabolcs; Csendes, Zita; Kukovecz, Ákos; Kónya, Zoltán; Carlson, Stefan LU ; Korecz, László; Varga, Erika and Pusztai, Péter, et al. (2016) In Journal of Molecular Catalysis A: Chemical 423. p.49-60
Abstract

Intercalated composite materials were prepared with CaAl-layered double hydroxide as host and Cu(II)-amino acid (L-cysteine, L-histidine and L-tyrosine) complex anions as guests. Two methods (intercalation of the ligand first followed by constructing the complex; preforming the complex first, then introducing it among the layers of the host) and optimization of the synthesis conditions were performed to obtain composites having the complex exclusively among the layers. The composite materials were structurally characterized by powder X-ray diffractometry, mid infrared (IR) spectroscopy with ATR (attenuated total reflectance) or photoacoustic detections, transmission and scanning electron microscopies and X-ray photoelectron... (More)

Intercalated composite materials were prepared with CaAl-layered double hydroxide as host and Cu(II)-amino acid (L-cysteine, L-histidine and L-tyrosine) complex anions as guests. Two methods (intercalation of the ligand first followed by constructing the complex; preforming the complex first, then introducing it among the layers of the host) and optimization of the synthesis conditions were performed to obtain composites having the complex exclusively among the layers. The composite materials were structurally characterized by powder X-ray diffractometry, mid infrared (IR) spectroscopy with ATR (attenuated total reflectance) or photoacoustic detections, transmission and scanning electron microscopies and X-ray photoelectron spectroscopy. Structural features of the intercalant (coordination number, coordination sites) were elucidated by classical chemical and energy dispersive X-ray analyses, EPR (electron paramagnetic spectroscopy), X-ray absorption and far IR spectroscopies. Structural models based on these methods are also given. Catalytic activities, selectivities and recycling abilities of the substances were studied in the oxidation reactions of cyclohexene with peracetic acid and in situ formed iodosylbenzene as oxidants in the liquid phase. The catalysts were active in the Ullmann coupling reaction as well. The intercalated substances were found to be efficient and highly selective catalysts with very good recycling abilities.

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keywords
Catalytic properties in oxidation reactions, Cu(II)-amino acid complexes in CaAl-LDH, Methods of synthesis, Structural characterization
in
Journal of Molecular Catalysis A: Chemical
volume
423
pages
12 pages
publisher
Elsevier
external identifiers
  • scopus:84975297578
  • wos:000383827600006
ISSN
1381-1169
DOI
10.1016/j.molcata.2016.06.008
language
English
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yes
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c4cdf1a9-552a-4ff1-abcc-49b7b04920ea
date added to LUP
2016-10-13 13:57:18
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2017-07-02 04:55:00
@article{c4cdf1a9-552a-4ff1-abcc-49b7b04920ea,
  abstract     = {<p>Intercalated composite materials were prepared with CaAl-layered double hydroxide as host and Cu(II)-amino acid (L-cysteine, L-histidine and L-tyrosine) complex anions as guests. Two methods (intercalation of the ligand first followed by constructing the complex; preforming the complex first, then introducing it among the layers of the host) and optimization of the synthesis conditions were performed to obtain composites having the complex exclusively among the layers. The composite materials were structurally characterized by powder X-ray diffractometry, mid infrared (IR) spectroscopy with ATR (attenuated total reflectance) or photoacoustic detections, transmission and scanning electron microscopies and X-ray photoelectron spectroscopy. Structural features of the intercalant (coordination number, coordination sites) were elucidated by classical chemical and energy dispersive X-ray analyses, EPR (electron paramagnetic spectroscopy), X-ray absorption and far IR spectroscopies. Structural models based on these methods are also given. Catalytic activities, selectivities and recycling abilities of the substances were studied in the oxidation reactions of cyclohexene with peracetic acid and in situ formed iodosylbenzene as oxidants in the liquid phase. The catalysts were active in the Ullmann coupling reaction as well. The intercalated substances were found to be efficient and highly selective catalysts with very good recycling abilities.</p>},
  author       = {Varga, Gábor and Ziegenheim, Szilveszter and Muráth, Szabolcs and Csendes, Zita and Kukovecz, Ákos and Kónya, Zoltán and Carlson, Stefan and Korecz, László and Varga, Erika and Pusztai, Péter and Sipos, Pál and Pálinkó, István},
  issn         = {1381-1169},
  keyword      = {Catalytic properties in oxidation reactions,Cu(II)-amino acid complexes in CaAl-LDH,Methods of synthesis,Structural characterization},
  language     = {eng},
  month        = {11},
  pages        = {49--60},
  publisher    = {Elsevier},
  series       = {Journal of Molecular Catalysis A: Chemical},
  title        = {Cu(II)-amino acid–CaAl-layered double hydroxide complexes, recyclable, efficient catalysts in various oxidative transformations},
  url          = {http://dx.doi.org/10.1016/j.molcata.2016.06.008},
  volume       = {423},
  year         = {2016},
}