Ossila 1,3,5-Tris(4′-carboxy[1,1′-biphenyl]-4-yl)benzene B3061

1,3,5-Tris(4′-carboxy[1,1′-biphenyl]-4-yl)benzene, known as H3TCBPB (CAS 911818-75-2), is a nanosized trigonal carboxylate linker used to construct metal-organic frameworks (MOFs). Supplied as a white powder/crystal with purity above 98%, it features biphenyl arms connecting a central benzene ring to three carboxylic acid groups. Neighbouring carboxylate groups sit roughly 2 nm apart, and each lies about 1.2 nm from the central ring.

Unlike many carboxylic acid assemblies, H3TCBPB dimers are held together by 2-fold C−H···O hydrogen bonds rather than the expected O−H···O bonds. The resulting displaced dimers form a deformed hexagonal porous network with higher packing density, and the reduced symmetry leads to chiral polymorphs in surface monolayers.

When combined with aluminium ion cluster nodes, the ligand forms Al-TCBPB, a monoclinic MOF (space group c2/m) with a BET surface area of 2,311 m2/g and a total pore volume of 0.80 cm3/g. At 9 MPa it shows excess hydrogen adsorption of 4.8 wt.% at 77 K and 1.4 wt.% at 298 K.

• Linker for synthesising metal-organic frameworks such as Al-TCBPB.
• Development of porous materials for hydrogen adsorption and storage studies.
• Research into two-dimensional supramolecular networks and monolayer self-assembly at liquid–solid interfaces.
• Studies of host–guest chemistry and polymorphism in hydrogen-bonded networks.

• Product code: B3061
• M​olecular Weight: 666.72 g/mol
• Synonyms: H3TCBPB, H3BBC, TCBTB, TCBPB
• Classification / Family: Terphenyl, MOF ligands
• Melting Point: 326 °C

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