Synthesis of Indium Complexes for Thin Film Transistor Applications Bearing N ‐Alkoxy Carboxamide Ligands

By reacting equimolar amount of trimethylindium with various N ‐alkoxy carboxamidate type‐ligands in a single step reaction, new series of indium complexes ( 1‐3 ), [In(CH 3 ) 2 (L)] 2 (L 1 H= N ‐methoxypropionamide (mpaH), L 2 H= N ‐ethoxy‐2‐methyl propanamide (empaH), L 3 H= N ‐ethoxy‐2,2‐dimethyl propanamide (edpaH)), were successfully synthesized. All complexes were fully characterized by FTIR and NMR spectroscopy along with elemental and thermogravimetric (TG) analyses. While complex 1 and 2 were solid in room temperature, complex 3 which relatively bulkier ligand L 3 H was introduced was in liquid state. Among them, complex 1 was structurally characterized by single crystal X‐ray diffraction. Complex 1 existed in a tetragonal I 4(1) /a space group that consist of a pair enantiomers. A sharp weight loss between 130 °C and 230 °C in a single step in TGA for all complexes showed outstanding volatility properties with lowest residual mass of 10% which are a crucial factor in thin film industry.