5,5'-(Pyridine-3,5-diyl)diisophthalic acid, also known as H4PyDIP (CAS 1433029-60-7), is a rigid tetracarboxylic acid linker used to build metal-organic frameworks (MOFs). Its structure places a central pyridine spacer between two isophthalic acid groups, giving a bridging ligand from the biphenylpyridine family. Ossila supplies it at >98% purity as an off white powder or crystal.
In lanthanide MOFs of the type [(CH3)2NH2]2[Ln2(L)2(H2O)2]·2DMF·2H2O, this ligand gives frameworks that can selectively sense polychlorinated benzenes and detect Fe3+ ions with high sensitivity (KSV = 7.58 × 10^4 M–1).
Combined with 1H-tetrazole in the Zn(II) framework [Me2NH2][Zn2(PyDIP)(HTZ)]·4DMF, it yields a porous material with two kinds of 1D open channels. The pores are lined with uncoordinated N atoms and carboxylic O atoms, creating a highly polar environment suited to selective CO2 adsorption.
- Building block for constructing metal-organic frameworks as a rigid bridging linker.
- Preparation of Ln-MOFs for highly sensitive luminescent detection of Fe3+ ions.
- Synthesis of Ln-MOFs for selective sensing of polychlorinated benzenes.
- Mixed-ligand Zn(II) MOFs designed for selective adsorption of carbon dioxide.
| Brand | Ossila |
|---|---|
| CAS number | 1433029-60-7 |
| Molecular formula | C21H13NO8 |
| Purity | >98% |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Off white powder/crystal |
| Storage | — |
- Product code: B3171
- Molecular Weight: 407.33 g/mol
- Synonyms: 3,5-bis(3,5-dicarboxylphenyl)pyridine, H4PyDIP, H4PDDA, H4BDPP
- Classification / Family: Biphenylpyridine, MOF ligands
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