Ossila 5'-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,1':3',1''-terphenyl]-4,4''-dicarbaldehyde B3651

5'-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,1':3',1''-terphenyl]-4,4''-dicarbaldehyde (CAS 1033752-94-1) is a meta-terphenyl building block carrying one pinacolborane (Bpin) group and two aldehyde groups. It is supplied as a white to off-white powder with 98% purity and is used as an intermediate in the synthesis of covalent organic frameworks (COFs).

Because the boronate ester and the aldehydes react under different conditions, the molecule can be functionalised step by step, giving chemists room for precise molecular design. Acting as a C2 linker, it has been used to build crystalline 2D COFs that are highly conjugated and show two-photon up-conversion luminescence.

The route is flexible: Suzuki coupling lets researchers swap the core joining two of these units for a chosen functional molecule. Semiconducting COFs made this way have delivered photocatalytic hydrogen evolution rates of up to 1410 μmol g-1 h-1.

• Linker for synthesising crystalline 2D covalent organic frameworks.
• Building block for semiconducting COFs used in photocatalytic hydrogen generation.
• Precursor for highly conjugated COFs showing two-photon up-conversion luminescence.
• Substrate for Suzuki coupling to introduce custom functional cores between linker units.

• Product code: B3651
• M​olecular Weight: 412.29 g/mol
• Classification / Family: COFs, Aldehyde ligands, Pinacolborane ligands, Photocatalytic hydrogen reaction, Semiconducting COFs, Up-conversion luminescence

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