- Aerosol assisted chemical vapor deposition (AACVD) of CdS thin films from heterocyclic cadmium(II) complexes
-
Abstract Cadmium dithiocarbamato complexes of piperidine (1) and tetrahydroquinoline (2) were synthesized and characterized by elemental analysis, FT-IR spectroscopy, NMR and TGA analyses. The X-ray single crystal structure of bis(piperidinedithiocarbamato)cadmium(II) complex (1) was determined. The synthesized compounds were used as single source precursors to deposit CdS films on glass substrates at 350, 400 and 450 °C using the aerosol assisted chemical vapor deposition (AACVD) method. The surface morphology and the size of the CdS films were determined by AFM and SEM analyses; the crystalline phases by p-XRD analyses and the elemental composition by EDX measurements. The particle sizes were found to be in the range between 50-110 nm and 100-220 nm for complex (1) and (2), respectively. The electronic properties of the CdS films were analyzed by UV-Vis and Raman spectroscopic methods. Results revealed that the morphology, size and composition of the films are influenced by the deposition temperature.
- Mlowe, Sixberth,Nyamen, Linda D.,Ndifon, Peter T.,Malik, M. Azad,Raftery, James,O'Brien, Paul,Revaprasadu, Neerish
-
-
Read Online
- Synthesis of multi-podal CdS nanostructures using heterocyclic dithiocarbamato complexes as precursors
-
Bis(dipiperidinyldithiocarbamato)cadmium(II) (1) and bis(ditetrahydroquinolinyldithio-carbamato)cadmium(II) (2) were used as precursors for the synthesis of oleylamine (OA), decylamine (DA) and dodecylamine (DDA) capped CdS nanoparticles. The optical properties of these particles have been studied. The absorption spectra for the amine capped CdS particles are blue shifted in relation to the bulk material. The corresponding photoluminescence spectra show a narrow band edge emission. High quality crystalline CdS particles of different shapes, ranging from short nanorods and elongated nanorods (rods, bipods, tripods and tetrapods) to nanocubes were obtained when the reaction temperature was varied between 180 and 270 C. A decrease in the length of the rods and bipodal nanoparticles was observed with an increase in the length of the chain of the amine (capping agent) used. The p-XRD patterns revealed the hexagonal phase of CdS to be dominant in all the samples. Infra-red studies suggest that the mode of bonding of the amines (oleylamine, decylamine and dodecylamine) on the CdS nanoparticle surfaces is through electron donation from the nitrogen atoms.
- Nyamen, Linda D.,Revaprasadu, Neerish,Pullabhotla, Rajasekhar V.S.R.,Nejo, Adeola A.,Ndifon, Peter T.,Malik, Mohammad Azad,O'Brien, Paul
-
-
Read Online
- Composition and Structure of Complexes in Magnetically Diluted Systems of Copper(II) Dithiocarbamates Cu/M(Dtc)2 (M = Zn, Cd, Hg)
-
The magnetically diluted complexes Cu/M(Dtc)2 (where M = Zn, Cd, or Hg, and Dtc is the dibutyl-, pentamethylene-, hexamethylene-, or morpholinedithiocarbamate ligand) were studied by EPR. In these systems, copper(II) forms four types of complexes: the mononuclear Cu(Dtc)2 complexes, the CuM(Dtc)4 dimers, and some heteronuclear species resulting from the substitution of one copper atom for a metal atom in the binuclear or mononuclear parts of the adduct-like polynuclear complexes M2(Dtc)4 · nM(Dtc)2 (n = 1-4). The geometry of the copper(II) coordination polyhedra is discussed for all the complexes identified. Structural instability of some of these magnetically diluted systems is attributed to lability of the polynuclear species.
- Ivanov,Mitrofanova,Rodina
-
p. 570 - 574
(2008/10/08)
-
- THE DIRECT ELECTROCHEMICAL SYNTHESIS OF DIALKYLDITHIOCARBAMATE AND DIETHYLDITHIOPHOSPHATE COMPLEXES OF MAIN GROUP AND TRANSITION METALS
-
Dialkyldithiocarbamate derivatives (R2NCS2)nM of a number of metals (M=Fe, Co, Ni, Cu, Ag, Zn, Cd, In, Tl) have been synthesised in good yield by electrochemical oxidation of appropriate sacrificial anodes in non-aqueous solutions of either the corresponding tetraalkylthiuran disulphide (R2NCS2)2 (R=Me, Et) or a mixture of carbon disulphide plus the secondary amine R2NH (R=Et, i-Pr; R2NH=piperidine).Similar experiments with solutions of (EtO)2P(S)SH (=HL) gave MLn* derivatives (M=Fe, Co, Ni, Cu, Ag, Au, Zn, Cd, Hg, Ga, In, Tl) while in the presence of HL+1,10-phenanthroline, MLn.phen derivatives were obtained for M=V, Mn, Fe, Co, Zn, and Ga.
- Geloso, Corrado,Kumar, Rajesh,Lopez-Grado, Jaime Romero,Tuck, Dennis G.
-
p. 928 - 932
(2007/10/02)
-