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1,3,5-Tris(4-ethynylphenyl)benzene

CAS Number 71866-86-9

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


Product Code B3791-1g
Price £55 ex. VAT

Covalent Organic Frameworks (COFs) Terphenyl Ligand

An ethynyl ligand linker for COFs in application of carbon dioxide reduction, hydrogen peroxide detection, battery cathode and water spillage.


Specifications | MSDS | Literature and Reviews


1,3,5-Tris(4-ethynylphenyl)benzene (TEPB), CAS number 71866-86-9, has a trigonal structure with three 4-ethynylphenyl groups sitting at meta-positions to each other around a benzene ring. 1,3,5-Tris(4-ethynylphenyl)benzene is generally engaged in the synthesis of porous conjugated polymers (PCPs) and other semiconducting covalent organic frameworks (COFs).

Microporous conjugated semiconducting polymer, PCP-SO-TPB, prepared from 1,3,5-tris(4-ethynylphenyl)benzene as the linker and 2,7-dibromodibenzo[b,d]thiophene 5,5-dioxide as the active nodes via Sonogashira–Hagihara cross-coupling reaction, exhibited high BET surface areas, high CO2over N2 selectivity, and broad visible light absorptions. PCP-SO-TPB demonstrated high carbon monoxide production rate of 40.12 μmol h−1 g−1 and nearly 100% product selectivity without using organic sacrificial reagent and additional cocatalyst.

1,3-diyne-linked conjugated microporous polymer nanosheets (CMPNs), prepared by oxidative coupling of terminal alkynes 1,3,5-tris-(4-ethynylphenyl)benzene, demonstrated highly efficient photocatalytic activity for hydrogen production under visible light with quantum efficiency of 10.3% at 420 nm. 

MOF and COF ligands

MOF and COF ligands

Ethyne ligand for cross-linked COF networks

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High purity 71866-86-9

High purity

>97% High purity

Facile reactions

Facile reactions

Readily for click reaction and Sonogashira reaction

General Information


CAS Number 71866-86-9
Chemical Formula C30H18
Full Name 1,3,5-Tris(4-ethynylphenyl)benzene
Molecular Weight 378.46  g/mol
Synonyms TEPB, 4,4''-Diethynyl-5'-(4-ethynylphenyl)-1,1':3',1''-terphenyl
Classification / Family Terphenyl, COF ligands

Chemical Structure


71866-86-9 - 1,3,5-tris(4-ethynylphenyl)benzene chemical structure
1,3,5-Tris(4-ethynylphenyl)benzene(TEPB) Chemical Structure, 71866-86-9

Product Details


Purity >97%
Melting Point 210 °C
Appearance Off white to yellow powder/crystals

MSDS Documentation


71866-86-9 - 1,3,5-tris(4-ethynylphenyl)benzene1,3,5-Tris(4-ethynylphenyl)benzene MSDS Sheet

Literature and Reviews


  1. 1,3,5-Triphenylbenzene Based Porous Conjugated Polymers for Highly Efficient Photoreduction of Low-Concentration CO2 in the Gas-Phase System, C. Dai et al., Solar RRL, 6 (4), 2100872 (2022); DOI: 10.1002/solr.202100872.
  2. Poly(1,3,5-tris(4-ethynylphenyl)-benzene) Conjugated Polymers as Electrochemical Sensors for Hydrogen Peroxide Detection, C. Qi et al., ACS Appl. Polym. Mater., 2 (2), 685–690 (2020); DOI: 10.1021/acsapm.9b01013.
  3. Conjugated Microporous Polymer Nanosheets for Overall Water Splitting Using Visible Light, L. Wang et al., Adv. Mater., 29 (38), 1702428 (2017); DOI: 10.1002/adma.201702428.

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