Highly pure quaterthiophene (4T) has been prepared from monobromobithiophene by a Ni-0-mediated coupling reaction. The analysis of impurities produced by the synthetic procedure, performed by mass spectrometry and gas chromatography with a mass spectrometer detector, has allowed the identification of at least four contaminants, among them, alpha-bromoquaterthiophene (Br-4T). Studies of photoluminescence carried out at low temperatures ( from 70 to 4 K) on 4T thin films grown by organic molecular beam deposition are demonstrated to be a powerful tool in detecting impurities that can act as traps for 4T emission. Indeed, it was possible to assign the anomalous emission observed in some 4T thin films to Br-4T. A protocol for removal of 4T contaminants is also proposed.

Trabattoni, S., Laera, S., Mena, R., Papagni, A., Sassella, A. (2004). Preparation of highly pure quaterthiophene and role of impurities on its photoluminescence properties. JOURNAL OF MATERIALS CHEMISTRY, 14(2), 171-178 [10.1039/b309150c].

Preparation of highly pure quaterthiophene and role of impurities on its photoluminescence properties

TRABATTONI, SILVIA;PAPAGNI, ANTONIO;SASSELLA, ADELE
2004

Abstract

Highly pure quaterthiophene (4T) has been prepared from monobromobithiophene by a Ni-0-mediated coupling reaction. The analysis of impurities produced by the synthetic procedure, performed by mass spectrometry and gas chromatography with a mass spectrometer detector, has allowed the identification of at least four contaminants, among them, alpha-bromoquaterthiophene (Br-4T). Studies of photoluminescence carried out at low temperatures ( from 70 to 4 K) on 4T thin films grown by organic molecular beam deposition are demonstrated to be a powerful tool in detecting impurities that can act as traps for 4T emission. Indeed, it was possible to assign the anomalous emission observed in some 4T thin films to Br-4T. A protocol for removal of 4T contaminants is also proposed.
Articolo in rivista - Articolo scientifico
highly pure quaterthiophene, photoluminescence, role of impurities,
English
2004
14
2
171
178
none
Trabattoni, S., Laera, S., Mena, R., Papagni, A., Sassella, A. (2004). Preparation of highly pure quaterthiophene and role of impurities on its photoluminescence properties. JOURNAL OF MATERIALS CHEMISTRY, 14(2), 171-178 [10.1039/b309150c].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/5745
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