Synthesis, characterization and luminescence study of dimethyl(β-ketoiminato)gallium (-indium) complexes: crystal structure of dimethyl[1-phenyl-3-N-(4-methoxyphenylimino)-1-butanonato]gallium

Synthesis, characterization and luminescence study of dimethyl[2-(arylmethyleneimino)phenolato]gallium complexes: Crystal structure of dimethyl[N-(4-N,N′-dimethylamino) phenylmethyleneiminophenolato]gallium

“…In the 1 H NMR spectra, the signals of gallium bonded methyl protons in the complexes 1-3 (À0.15 to À0.18 ppm) shift upfield comparing with the signals of trimethylgallium (À0.10 ppm). It is believed that the coordination of nitrogen atom to the gallium atom is responsible for the upfield shifting of the proton signals [16]. Although monomeric ion peaks of the complexes 1-3 were all visible in their MS spectra, there are some peaks appeared in the higher m/e region in some of the complexes.…”

“…So development of various electroluminescent materials and study the relationship between structure and electroluminescence property are in great need. Recently, we have reported some light-emitting materials based on N-arylmethylenethiobenzahydrazone and beta-ketoimine group 13 organometallic complexes [14,15]. In order to search for the new electroluminescent materials, the synthesis and characterization of various bis[dimethyl [2-(arylmethyleneimino)phenolato]gallium] complexes (1-3) have been described in this paper.…”

Blue/green light‐emitting diode based on diethyl[N‐arylmethylenethiobenzahydrazonato]gallium complexes

“…Similar phenomena have been observed previously in EL devices using hole-injection material doped with organogallium complexes. 16,19,20 Complexes 1 and 3 have a similar structure but the emission energy of 1 has an approximately 45 nm blue shift relative to that of 3. The large delocalized conjugation anthryl group in the ligand apparently increases the π * -π energy gap, which is not surprising since the anthryl is more electronegative than the 4-methoxyphenyl, and thus capable of lowing the HOMO level and increasing the HOMO and LOMO gap.…”

Phosphorescent Thiazol-2-ylidene Platinum(II) Complexes with β-Ketoiminates: Single Isomer Formation by Ligand Architecture

“…Compared to typical acac ligand systems, β-ketoimines (acnac) have the advantage of applying electronic and steric effects via the (substituted) nitrogen atom while still keeping the monoanionic, bidentate ligand structure. N -Aryl-β-ketoiminates have previously been used as coordination compounds for different photoluminescent complexes with gallium (Scheme , I ) and aluminum (Scheme , II ) and in phosphorescent iridium­(III) emitters (Scheme , III and IV ) …”