What Is 4,4′-Bipyridine Used For
4,4′-Bipyridine (CAS 553-26-4) is a symmetrical bidentate nitrogen ligand. Its two pyridine nitrogens at the 4,4′ positions allow it to bridge metal centers, making it a foundational building block in coordination chemistry, metal-organic frameworks (MOFs) and electrochemical systems.
Major Applications
- Coordination polymers and MOFs: Spacer ligand that extends metal nodes into 2D and 3D frameworks for gas storage and catalysis research.
- Redox mediator: Viologen derivatives (N,N’-dialkyl-4,4′-bipyridinium) are electrochromic and used in electrochromic devices and flow batteries.
- Organic synthesis: Catalyst ligand in cross-coupling and C-H activation reactions; precursor to substituted bipyridines.
- Pharmaceutical intermediates: Building block for selected API scaffolds and agrochemical candidates.
- Materials research: Electron-transfer mediator in photochemical and photocatalytic systems.
Typical Quality Parameters
| Parameter | Specification |
|---|---|
| Purity (GC) | ≥99% |
| Melting point | 110–114°C |
| Appearance | White to off-white crystalline powder |
| Moisture | ≤0.5% |
Packaging
4,4′-Bipyridine is supplied in 25 kg fiber drums with PE liner (or 1 kg / 5 kg lab packs for R&D orders). Store under nitrogen, away from strong oxidizers. COA and SDS provided per batch.
View 4,4′-bipyridine product specifications and request a quote.