Tuning emitting color of electroluminescent devices containing tris(2‑acyl‑1,3‑indandionate)aluminum(III) complexes as emitting layers

COSTA, ISRAEL F.MOURA, JANDEILSON L.ADERNE, RIAN E.AVILA, HAROLD C.CREMONA, MARCOBRITO, HERMI F.FELINTO, MARIA C.F.C.FAUSTINO, WAGNER M.TEOTONIO, ERCULES E.S.2019-11-272019-11-272019COSTA, ISRAEL F.; MOURA, JANDEILSON L.; ADERNE, RIAN E.; AVILA, HAROLD C.; CREMONA, MARCO; BRITO, HERMI F.; FELINTO, MARIA C.F.C.; FAUSTINO, WAGNER M.; TEOTONIO, ERCULES E.S. Tuning emitting color of electroluminescent devices containing tris(2‑acyl‑1,3‑indandionate)aluminum(III) complexes as emitting layers. <b>Journal of the Brazilian Chemical Society</b>, v. 30, n. 8, p. 1647-1656, 2019. DOI: <a href="https://dx.doi.org/10.21577/0103-5053.20190064">10.21577/0103-5053.20190064</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/30356.0103-5053http://repositorio.ipen.br/handle/123456789/30356In this study, a novel type of tris(2-acyl-1,3-indandione)-aluminum(III) coordination compounds of the general formula [Al(acind)3]H2O, where 2-acyl-1,3-indandione (acind), 2-acetyl- 1,3-indandione (aind), 2-benzoyl-1,3-indandione (bind), and 4-methyl-2-benzoyl-1,3-indandione (mbind), were synthesized and characterized by elemental analysis (CHN), Fourier transform infrared (FTIR) and nuclear magnetic resonance (1H NMR) spectroscopies, thermal analysis (TG/DTG and DTA), and optical absorption spectroscopy in the UV-Vis region. These compounds present remarkably high green luminescence in powder and in thin-film forms. However, when these compounds are applied in glass/ITO/β-NPB/spiro-2CBP/[Al(acind)3]/Al and glass/ITO/β‑NPB/ [Al(acind)3]/LiF/Al electroluminescent devices, where spiro-2CBP is 2,7-bis(carbazol-9-yl)-9,9- spirobifluorene and β-NPB is N,N’-bis(naphthalen-2‑yl)-N,N’-bis(phenyl)-benzidine, the emission color tuned from green to red, reflecting a change from the direct charge recombination in the emitting layer of the [Al(acind)3] complexes to an exciplex-based emission in which [Al(acind)3] complexes and spiro 2-CBP acted as acceptor and donor, respectively. These results suggest that [Al(acind)3] complexes have potential applications as molecular light converter materials for fabricating new electroluminescent devices.1647-1656openAccesselectroluminescencelight emitting diodestuningfourier transformationinfrared spectraaluminium complexeswavelengthsTuning emitting color of electroluminescent devices containing tris(2‑acyl‑1,3‑indandionate)aluminum(III) complexes as emitting layersArtigo de periódico83010.21577/0103-5053.201900640000-0001-7028-0878https://orcid.org/0000-0001-7028-087829.09654.00