Results found: 3

Number of results on page

Search results

Sort By:

Limit search:

Separation of AsVfrom aqueous solutions using chelating polymers containing FeIII-loaded phosphorus groups

100%

Negrea A., Ciopec M., Negrea P., Lupa L., Popa A., Davidescu C. M., Ilia G.

Open Chemistry

2015

vol. 13

issue 1

AsV ions were removed by batch equilibrium with FeIII-loaded chelating polymers containing aminophosphinic or aminophosphonic groups. It was effectively removed AsV from a synthetic wastewater as well as from a real drinking water containing 40 μg As per liter. Sorption is best described by pseudo-second order kinetics and a Langmuir isotherm.

Co doped ZnO semiconductor materials: structural, morphological and magnetic properties

84%

Popa A., Toloman D., Raita O., Biris A., Borodi G., Mustafa T., Watanabe F., Biris A., Darabont A., Giurgiu L.

Open Physics

2011

vol. 9

issue 6

1446-1451

Structural, morphological and magnetic properties of Zn1−xCoxO (x = 0.01 and 0.03) powdered materials are presented. XRD studies reveal a wurtzite-type structure, while the formation of a Co3O4 secondary phase was evidenced by Raman spectroscopy. A ferromagnetic behaviour with low Curie temperature was evidenced by Electron Paramagnetic Resonance (EPR) investigation. We suggest that the origin of the ferromagnetism in Zn1−xCoxO powders is probably due to the presence of the mixed cation valence of Co ions via a double-exchange mechanism rather than the real doping effect.

Wittig and Wittig-Horner reactions under phase transfer catalysis conditions

84%

Pascariu A., Ilia G., Bora A., Bora A., Iliescu S., Popa A., Dehelean G., Pacureanu L.

Open Chemistry

2003

vol. 1

issue 4

491-534

Wittig and Wittig-Horner reactions are favorite tools in preparative organic chemistry. These olefination methods enjoy widespread and recognition because of their simplicity, convenience, and effciency. Phase transfer catalysis (PTC) is a very important method in synthetic organic chemistry having many advantages over conventional, homogenous reaction procedures. In this paper, we attempt to summarize the aspects concerning Wittig and Wittig-Horner reactions that take place under phase transfer catalysis conditions.

Refine search results

2 Open Chemistry

1 Open Physics

1 2014

1 2011

1 2003

3 Popa A.

2 Ilia G.

1 Biris A.

1 Bora A.

1 Borodi G.

1 Ciopec M.

1 Darabont A.

1 Davidescu C. M.

1 Dehelean G.

1 Giurgiu L.

1 Iliescu S.

1 Lupa L.

1 Mustafa T.

1 Negrea A.

1 Negrea P.

1 Pacureanu L.

1 Pascariu A.

1 Raita O.

1 Toloman D.

1 Watanabe F.

Search results

Separation of AsVfrom aqueous solutions using chelating polymers containing FeIII-loaded phosphorus groups

Co doped ZnO semiconductor materials: structural, morphological and magnetic properties

Wittig and Wittig-Horner reactions under phase transfer catalysis conditions