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5,5’-(Pyridine-3,5-diyl)diisophthalic acid

CAS Number 1433029-60-7

Chemistry Building Blocks, Materials, MOF Ligands, Porous Organic Frameworks


Product Code B3171-250mg
Price $175 ex. VAT

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Metal Organic Frameworks (MOFs) Biphenylpyridine Ligand

A rigid bridging ligand linker for MOFs in applications of iron detection and selective adsorption of carbon dioxide


5,5′-(Pyridine-3,5-diyl)diisophthalic acid (H4PyDIP) is a rigid bridging-type tetracarboxylic acid molecule containing two isophthalic acid moieties and one pyridine spacer.

Ln-metal–organic framework (Ln-MOF) materials [(CH3)2NH2]2[Ln2(L)2(H2O)2]·2DMF·2H2O (H4L = H4PyDIP) can not only selectively detect polychlorinated benzenes, but also highly sensitively detect the Fe3+ ion (KSV = 7.58 × 104 M–1).

Zn(II) metal–organic framework (MOF) [Me2NH2][Zn2(PyDIP)(HTZ)]·4DMF (HTZ = 1H-tetrazole) contains two shapes of 1D open channels with suitable pore sizes, high porosity, and a highly polar pore system decorated with uncoordinated N atoms and carboxylic O atoms, providing a good environment for selective adsorption of CO2.

General Information

CAS Number 1433029-60-7
Chemical Formula C21H13NO8
Full Name 5,5’-(Pyridine-3,5-diyl)diisophthalic acid
Molecular Weight 407.33 g/mol
Synonyms 3,5-bis(3,5-dicarboxylphenyl)pyridine, H4PyDIP, H4PDDA, H4BDPP
Classification / Family Biphenylpyridine, MOF ligands, 

Chemical Structure

1433029-60-7 - 5,5’-(pyridine-3,5-diyl)diisophthalic acid
5,5’-(Pyridine-3,5-diyl)diisophthalic acid (H4PyDIP) Chemical Structure, 1433029-60-7

Product Details

Purity >98%
Melting Point n.a.
Appearance Off white powder/crystal

MSDS Documentation

1433029-60-7 - 5,5’-(pyridine-3,5-diyl)diisophthalic acid5,5’-(Pyridine-3,5-diyl)diisophthalic acid MSDS Sheet

Literature and Reviews

  1. White-Light-Emitting Materials and Highly Sensitive Detection of Fe3+ and Polychlorinated Benzenes Based on Ln-Metal–Organic Frameworks, J. Huang et al., Cryst. Growth Des., 18 (9), 5353–5364 (2018); DOI: 10.1021/acs.cgd.8b00773.
  2. Isostructural Metal–Organic Frameworks Assembled from Functionalized Diisophthalate Ligands through a Ligand-Truncation Strategy, Y. Liu et al., Chem. Eur. J. 19 (18), 5637-5643 (2013); DOI: 10.1002/chem.201203297.
  3. Functionalization of MOFs via a mixed-ligand strategy: enhanced CO2 uptake by pore surface modification, B. Liu et al., Dalton Trans., 47, 5298-5303 (2018); DOI: 10.1039/C8DT00502H.


To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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