Issue 10, 2014

N-(Chalcogen)phosphorylated (chalcogen)ureas of zinc and cadmium(ii): SSPs for group 12–16 thin films

Abstract

The bis-chelates of zinc (7–11) and cadmium (12–17) with general formula [M{R2P(X)NC(Y)NR′-η2-X,Y}2] were obtained from ligands 1–6 (iPr2P(X)NHC(Y)NC4H8: 1: X = S, Y = S; 2: X = S, Y = O; 3: X = O, Y = S; 4: X = S, Y = Se, 5: X = Se, Y = S; Ph2P(X)NC(Y)NC5H10: 6: X = S, Y = S). 4 and cadmium complex 15 are the first examples of this ligand system with carbon-bonded selenium as a donor atom. All the compounds were characterized by FTIR and multi-nuclear NMR spectroscopies, and microanalysis. The molecular structures of complexes 1, 7, 8, 11, and 15 were elucidated by single crystal X-ray diffraction. Thermal gravimetric analysis (TGA) and thermolysis experiments were carried out for the metal complexes. Selected pyrolysis residues were analyzed by scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and X-ray powder diffraction (XRPD). Remarkably, cadmium complex 13 gave a few crystals of CdS encrusted on the surface of CdO. Preliminary studies using the O,S-mixed cadmium complexes (13 and 14) as single source precursors (SSPs) were carried out for the deposition of thin films via AA-CVD. The results show that CdS films are obtained from both complexes, and in the case of 14 (the complex containing a P[double bond, length as m-dash]O fragment), persistent high carbon content was detected.

Graphical abstract: N-(Chalcogen)phosphorylated (chalcogen)ureas of zinc and cadmium(ii): SSPs for group 12–16 thin films

Supplementary files

Article information

Article type
Paper
Submitted
28 Mar 2014
Accepted
25 Jun 2014
First published
26 Jun 2014

New J. Chem., 2014,38, 4702-4710

Author version available

N-(Chalcogen)phosphorylated (chalcogen)ureas of zinc and cadmium(II): SSPs for group 12–16 thin films

I. D. Rojas-Montoya, A. Santana-Silva, V. García-Montalvo, M. Muñoz-Hernández and M. Rivera, New J. Chem., 2014, 38, 4702 DOI: 10.1039/C4NJ00482E

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