FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on info@ossila.com, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

4,4',4''-(Benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline

CAS Number 326002-91-9

COF Ligands, Materials, Porous Organic Frameworks


Product Code B4541-1g
Price £80 ex. VAT

Covalent Organic Frameworks (COFs) 1,3,5-Triethynylbenzene Ligand

Trigonal star shaped linker for covalent organic frameworks (COFs) in application of oxygen and carbon dioxide reduction as photocatalyst


Specifications | MSDS | Literature and Reviews


4,4',4''-(benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline (TETAB) has a triagonal star shaped structure with three 4-ethynylaniline connecting to a central benzene ring at 1,3,5-positions. 4,4',4''-(benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline has been used in the construction of covalent organic frameworks for photochemical reductions of O2 and CO2.

Imine-linked covalent organic frameworks (COFs), OMHS-COF-Co, prepared by condensation of 2,2’-bipyridine-5,5’-dicarbaldehyde and 4,4',4''-(benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline, is engaged as photocatalyst in the photochemical reduction of CO2 to CO. It shows a preeminent cycling stability and an impressive CO production rate of as high as 15 874 µmol g−1 h−1, and a large selectivity of 92.4%.

MOF and COF ligands

MOF and COF ligands

Rigid ligand linker for cross-linked COF networks

Worldwide shipping for 910231-21-9

Worldwide shipping

Quick and reliable shipping

High purity 910231-21-9

High purity

>98% High purity

Facile reactions

Facile reactions

Readily for polycondensation reactions to form imine or amide linkages

One-dimensional TP–TTA–COF constructed from 1,3,5-triformylphloroglucinol and 4,4′,4″-(benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline yields highly stable β-ketoenamine and abundant alkynyl groups. Further reaction of H2PtCl6·6H2O with TP–TTA–COF by coordinating Pt to the N and O atoms of the C–N and C=O bonds from the linkage and 1,3,5-triformylphloroglucinol units gives PtCl-COF as photocatalyst to boost hydrogen peroxide production.

General Information


CAS Number 326002-91-9
Chemical Formula C30H21N3
Full Name 4,4',4''-(Benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline
Molecular Weight 423.51 g/mol
Synonyms TETAB, 4,4',4''-(1,3,5-benzenetriyltri-2,1-ethynediyl)tris-Benzenamine
Classification / Family Triethynylbenzene, Anilines, COF ligand

Chemical Structure


326002-91-9 - 4,4',4''-(benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline chemical structure
4,4',4''-(Benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline (TETAB) Chemical Structure, 326002-91-9

Product Details


Purity > 98%
Melting Point n.a.
Appearance Dark yellow powder/crystals

MSDS Documentation


326002-91-9 - 4,4',4''-(benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline4,4',4''-(Benzene-1,3,5-triyltris(ethyne-2,1-diyl))trianiline MSDS Sheet

Literature and Reviews


  1. Boosting hydrogen peroxide production via establishment and reconstruction of single-metal sites in covalent organic frameworks, S. Yang et al., SunMat, 3 (3), 379-389 (2023); DOI: 10.1002/sus2.125.
  2. Nanostructurally Engineering Covalent Organic Frameworks for Boosting CO2 Photoreduction, T. Zheng et al., Small, 2307743 (2023); DOI: 10.1002/smll.202307743.
Return to the top