138372-67-5

Basic information

• Product Name: 2,2'-(1,3-Phenylene)bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole]
• Synonyms: 1,3-BIS[5-(4-(1,1-DIMETHYLETHYL)PHENYL)-1,3,4-OXADIAZOL-2-YL]BENZENE;2,2'-(1,3-Phenylene)bis5-4-(1,1-dimethylethyl)phenyl-1,3,4-Oxadiazole;OXD-7;1,3-BIS[(P-TERT-BUTYL)PHENYL-1,3,4-OXADIAZOYL]BENZENE;2,2'-(1,3-Phenylene)bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole];1,3-Bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazole-5-yl]benzene;1,3-Bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole-2-yl]benzene;2,2'-(1,3-Phenylene)bis[5-(p-tert-butylphenyl)-1,3,4-oxadiazole]
• CAS NO: 138372-67-5
• Molecular Formula: C30H30N4O2
• Molecular Weight: 478.58
• Product Categories: electronic;White powder;olde Materials;OLED
• Mol File: 138372-67-5.mol
• Article Data: 1

Chemical Properties

• Melting Point: 241.42-243.29°C
• Boiling Point: 625.672 °C at 760 mmHg
• Flash Point: 314.132 °C
• Appearance: /
• Density: 1.132
• Storage Temp.: Sealed in dry,Room Temperature
• PKA: -5.37±0.39(Predicted)
• CAS DataBase Reference: 2,2'-(1,3-Phenylene)bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole](CAS DataBase Reference)
• NIST Chemistry Reference: 2,2'-(1,3-Phenylene)bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole](138372-67-5)
• EPA Substance Registry System: 2,2'-(1,3-Phenylene)bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole](138372-67-5)

Safety Data

• Hazardous Substances Data: 138372-67-5(Hazardous Substances Data)

Usage

Applications

1,3-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene (OXD-7) is a well known electron-transporting material due to the electron-accepting property of the oxadiazole units. Together with poly(9-vinylcarbazole) (PVK, electron donating), OXD-7 (electron withdrawing) is the most widely used hybrid-type host due to its good solubility and film morphology by the bulky tert-butyl units. OXD-7 has also been used as an ultraviolet emitter, with MoO3 as hole injection and buffer material showing relatively high external quantum efficiency.

Description

1,3-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene (OXD-7) is a well known electron-transporting material due to?the?electron-accepting?property of?the oxadiazole units. Together with poly(9-vinylcarbazole) (PVK, electron donating), OXD-7 (electron withdrawing) is the most widely used hybrid-type host due to its good solubility and film morphology by the bulky tert-butyl units.

Upstream product

• 1710-98-1 p-tert-butyl benzoyl chloride 
• 2760-98-7 isophthalic dihydrazide 

Relevant articles and documents

New electron-transporting materials for light emittind diodes: 1,3,4-oxadiazole-pyridine and 1,3,4-oxadiazole-pyrimidine hybrids

We described the synthesis of three new isomeric 1,3,4-oxadiazole-pyridine hybrids, namely: 2,6-, 3,5- and 2,4-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl]pyridine, (PDPy-2,6, PDPy-3,5 and PDPy-2,4, respectively) and a 1,3,4-oxadiazole-pyrimidine hybrid, namely: 2,5-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl]pyrimidine (PDPmDP). The X-ray crystal structures are reported for PDPy-2,4 and the known phenylene analogue 1,3-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl]benzene (OXD-7) as a 1:1 toluene solvate. The packing motif for molecules of both PDPy-2,4 and OXD-7 is that of discrete layers with the mean planes of all the molecules in the crystals parallel to within 6 deg. We have fabricated light-emitting diodes (LEDs) using poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) doped with rubrene as the emissive material, with and withuot a thermally evaporated electron conducting/hole blocking (ECHB) layer of PDPy-2,6, PDPy-3,5 and PDPy-2,4, PDPmDP and OXD-7, in the device configuration ITO/MEH-PPV(Ru)/ECHB layer/Al. Electroluminescence spectra indicate that light is emitted only from the MEH-PPV layer. The bilayer LEDs are considerably more efficient that single layer devices, e.g. the external quantum efficiences of devices incorporating PDPy-2,6, PDPy-3,5 and OXD-7 are 0.14, 0.04 and 0.06 percent at 40 mAm-2, respectively , cf. 0.007 percent for the reference single-layer MEH-PPV(Ru) device. There is no clear correlation between experomental EQE values and the PM3 calculated LUMO levels of the materials.