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Product Code B3571-1g
Price £80 ex. VAT

Covalent organic frameworks (COFs) diphenylacetylene ligand

for the synthesis of porous COFs as biocatalysts and photocatalysts, and macromolecules as fluorescent dyes


Specifications | MSDS | Literature and Reviews


4,4'-(Ethyne-1,2-diyl)dibenzaldehyde (CAS number 84907-55-1), is a diphenylacetylene derivative capped with two aldehyde functional groups. 4,4'-(Ethyne-1,2-diyl)dibenzaldehyde is employed for the preparation of an imine-linkage dual-pore COF with ethylenetetraaniline. The COF can immobilise lipase PS for enantioselectivity reaction of racemic secondary alcohols, showing 50% conversion over 80 minutes. Additionally, 4,4'-(ethyne-1,2-diyl)dibenzaldehyde reacts with trimethyltriazine to produce COFs that are used in photocatalytic reaction for H2O2 production (1.8 mmol h-1 g-1).

Other than COFs, 4,4'-(ethyne-1,2-diyl)dibenzaldehyde also finds application in the synthesis of fluorescent macromolecules with a fluorescence quantum yield of 32%. The synthesis of this ethynyl-linked boron dipyrromethene involves a Rothmund reaction between 4,4'-(ethyne-1,2-diyl)dibenzaldehyde and a pyrrole derivative, followed by boron complexation.

Facile reactions

Facile reactions

Aldehyde possesses excellent reactivity

High Purity 84907-55-1

High Purity

>98% Purity

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MOF and COF ligands

MOF and COF ligands

Aldehyde ligand for cross-linked COF networks

General Information


CAS Number 84907-55-1
Chemical Formula C16H10O2
Full Name 4,4'-(1,2-Ethynediyl)dibenzaldehyde
Molecular Weight 234.25 g/mol
Synonyms Di(4-formylphenyl)acetylene, Diphenylacetylene-4,4'-dicarbaldehyde, 4-[2-(4-formylphenyl)ethynyl]benzaldehyde, EDDA
Classification / Family Diphenylacetylenes, Dialdehyde ligands, COFs, Fluorescent dyes, Biocatalysis, photocatalysis

Chemical Structure


4,4'-(Ethyne-1,2-diyl)dibenzaldehyde chemical structure, CAS 84907-55-1.
4,4'-(Ethyne-1,2-diyl)dibenzaldehyde chemical structure, CAS 84907-55-1

Product Details


Purity 98%
Melting Point N/A
Appearance Yellow powder

MSDS Documentation


4,4'-(Ethyne-1,2-diyl)dibenzaldehyde4,4'-(Ethyne-1,2-diyl)dibenzaldehyde MSDS Sheet

Literature and Reviews


  1. Constructing synergistic triazine and acetylene cores in fully conjugated covalent organic frameworks for cascade photocatalytic H2O2 production, L. Zhai et al., Chem. Mater., 34(11), 5232–5240 (2022); DOI: 10.1021/acs.chemmater.2c00910.
  2. Tuning pore heterogeneity in covalent organic frameworks for enhanced enzyme accessibility and resistance against denaturants, Q. Sun et al., Adv. Mater., 31, 1900008 (2019); DOI: 10.1002/adma.201900008.
  3. Enzyme immobilization in covalent organic frameworks: strategies and applications in biocatalysis, F. Oliveira et al., ChemPlusChem, 85, 2051–2066 (2020); DOI: 10.1002/cplu.202000549.
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