The invention provides compounds having utility inter alia as electron transport materials in optical light emitting diodes (OLEDs) and of the formula (I), (Il) or (III). Embodiments of the compounds when incorporated as electron transport layers in OLEDs exhibit a greater current density for a given voltage than corresponding devices where the electron transport material is aluminium quinolate.
                            该发明提供了作为光电发光二极管(OLEDs)中电子传输材料的化合物,具有公式(I)、(II)或(III)的用途。当这些化合物作为OLED中的电子传输层时,与电子传输材料为铝
喹啉的相应器件相比,表现出给定电压下更大的电流密度。