137911-27-4

Basic information

• Product Name: Benzaldehyde, 4-[[4'-(diphenylamino)[1,1'-biphenyl]-4-yl]phenylamino]-
• CAS NO: 137911-27-4
• Molecular Formula: C37H28N2O
• Molecular Weight: 516.642
• Mol File: 137911-27-4.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: Benzaldehyde, 4-[[4'-(diphenylamino)[1,1'-biphenyl]-4-yl]phenylamino]-(CAS DataBase Reference)
• NIST Chemistry Reference: Benzaldehyde, 4-[[4'-(diphenylamino)[1,1'-biphenyl]-4-yl]phenylamino]-(137911-27-4)
• EPA Substance Registry System: Benzaldehyde, 4-[[4'-(diphenylamino)[1,1'-biphenyl]-4-yl]phenylamino]-(137911-27-4)

Safety Data

• Hazardous Substances Data: 137911-27-4(Hazardous Substances Data)

Upstream product

• 603-34-9 N,N-diphenylaminobenzene 
• 36809-26-4 4-N,N-diphenylamino-1-bromobenzene 
• 201802-67-7 4-(diphenylamino)phenyl boronic acid 
• 847978-62-5 4-[N-(4-bromophenyl)-N-phenylamine]benzaldehyde 
• 15546-43-7 N,N,N',N'-tetraphenyl-4,4'-diaminobiphenyl 
• 68-12-2 N,N-dimethyl-formamide 

Relevant articles and documents

Solution-processed thermally stable amorphous films of small molecular hole injection/transport bi-functional materials and their application in high efficiency OLEDs

A series of novel triphenylamine-based small molecular hole transport materials (HTMs) are reported for solution processed organic light-emitting devices (OLEDs). The character of this series of HTMs, denoted as TPD(BTPA)n (n = 1, 2, 4), is connecting the flexible moieties of butadiene bridged triphenylamine (BTPA) to N,N,N′,N′-tetraphenyl-[1,1′-biphenyl]-4,4′-diamine (TPD). The glass transition temperature and crystallization temperature (Tg and Tc) showed a proportional relationship with the number of BTPA moieties. The Tg value of TPD(BTPA)4 can be up to 125.5 °C, which is higher than most of the reported small molecular HTMs (Tg: 54-116 °C). The TPD(BTPA)4 spincoated film showed an outstanding thermal stability which remained amorphous even when annealed at 110 °C, for 48 h. This indicated that the breaking of the planar molecular structure with BTPA moieties can suppress intermolecular stacking. The solution processed OLEDs with 8-hydroxyquinoline aluminum (Alq3) as emission and electron transport layers showed high stability at high operation current (>400 mA cm-2). The OLED with TPD(BTPA)4 achieved a maximum current efficiency of 5.83 cd A-1 (at the operation current density > 400 mA cm-2), which is higher than the maximum current efficiency of most evaporation and solution processed OLEDs in identical structures.