Some indium(III), antimony(III) and bismuth(III) dihalide complexes containing deprotonated, tridentate thio- and selenosemicarbazone ligands were prepared and were fully characterized by spectroscopic methods. In addition, the crystal structures of some of the compounds were obtained. TGA and DSC analyses were carried out on selected samples to assess their suitability as single-molecule precursors for metal selenide nanomaterials.
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The ring-opening polymerization (ROP) of l-lactide (l-LA) is the main method for synthesizing poly(l-lactide) (PLLA), in which choosing the catalyst is one of the most important parameters. In this work, we focused on the systematic study of catalysts based on p-block elements from period 5, such as indium(iii), tin(ii), tin(iv) and antimony(iii) acetates, which displayed contrasting performances influenced by the oxidation state of the metal center. Analysis of the obtained oligomers by different techniques, including nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), polarized optical microscopy (POM) and matrix-assisted laser desorption ionization-time-of-flight (MALDI-TOF), revealed the selectivity of each catalyst toward the ROP of l-LA.
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Some indium(III), antimony(III) and bismuth(III) dihalide complexes containing deprotonated, tridentate thio- and selenosemicarbazone ligands were prepared and were fully characterized by spectroscopic methods. In addition, the crystal structures of some of the compounds were obtained. TGA and DSC analyses were carried out on selected samples to assess their suitability as single-molecule precursors for metal selenide nanomaterials.
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