B2PymPm, or 4,6-Bis(3,5-di(pyridin-2-yl)phenyl)-2-methylpyrimidine (CAS 1266181-51-4), is an organic semiconductor supplied in sublimed grade with a purity above 99.0% (HPLC). It serves as an electron-transport layer (ETL) or hole-blocking layer (HBL) material in OLEDs and photovoltaic devices.
Its structure is built on a 2-methylpyrimidine centre carrying four pyridine side groups. These pyridine rings form hydrogen bonds both within each molecule and between neighbouring molecules, which helps the molecules adopt a flat shape and favours horizontal molecular orientation in films. This ordering is associated with high charge mobility.
The material has a HOMO of 6.62 eV, a LUMO of 3.55 eV and a triplet energy (E T1) of 3.04 eV. It appears as white crystals or powder, melts at 257 °C and has a glass transition temperature of 107 °C. Sublimation is used to reach an ultra pure grade suitable for device fabrication.
- Electron-transport layer in organic light-emitting diodes (OLEDs).
- Hole-blocking layer in OLED device stacks.
- Electron-transport or hole-blocking layer in organic photovoltaic devices.
- Research on charge mobility and molecular orientation in organic electronic films.
| Brand | Ossila |
|---|---|
| CAS number | 1266181-51-4 |
| Molecular formula | C37H26N6 |
| Purity | Sublimed: >99.0% (HPLC) |
| Category | — |
| Pack sizes | — |
| Physical form | White crystals/powder |
| Storage | — |
- Product code: M2173A2
- Full name: 4,6-Bis(3,5-di(pyridin-2-yl)phenyl)-2-methylpyrimidine
- Molecular weight: 554.64 g/mol
- Absorption: λ max 288 nm in chloroform
- Fluorescence: λ max 417 nm in chloroform
- HOMO/LUMO: HOMO = 6.62 eV, LUMO = 3.55 eV; E T1 = 3.04 eV
- Melting point: Tm = 257 °C
- Glass transition temperature: Tg = 107 °C
- Classification: Pyrimidine derivatives, ETL materials, HBL materials, Sublimed materials
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