Description

4-((4-Ethynylphenyl)Ethynyl)Benzoic Acid is a high-purity, functionalized organic building block featuring a rigid, linear conjugated structure with terminal alkyne and carboxylic acid groups. This compound is engineered for advanced materials science and pharmaceutical research, where precise molecular architecture is critical. It is primarily utilized by R&D chemists and material scientists in the fields of organic electronics, metal-organic frameworks (MOFs), and as a key intermediate in the synthesis of complex bioactive molecules.

Application

• Organic Electronic Materials: Serves as a crucial precursor for conjugated polymers and small molecules used in organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and field-effect transistors (OFETs).
• Metal-Organic Frameworks (MOFs): Acts as a functional linker molecule, where its rigid, linear shape and terminal alkyne groups facilitate the construction of porous, crystalline materials for gas storage, separation, and catalysis.
• Pharmaceutical Intermediates: Used in the synthesis of novel drug candidates, particularly where its alkyne functionality enables click chemistry reactions for rapid and selective compound library generation.
• Surface Modification & Functionalization: Employed to modify surfaces (e.g., gold, silicon) via its alkyne group for sensor development, nanotechnology, and creating advanced coatings.
• Liquid Crystal & Nonlinear Optical Materials: Its highly conjugated, rod-like structure makes it a candidate for developing materials with specific optical and electro-optical properties.

Basic Information

Product Name	4-((4-Ethynylphenyl)Ethynyl)Benzoic Acid
CAS No.	866825-55-0
Molecular Formula	C17H10O2
Molecular Weight	246.26 g/mol
Synonyms	4,4'-(Ethynylene)dibenzoic Acid (terminal alkyne form); 4-(2-(4-Ethynylphenyl)ethynyl)benzoic Acid; 4-[(4-Ethynylphenyl)ethynyl]benzoic Acid; 4-Carboxy-4'-ethynyl-diphenylacetylene; p,p'-Diethynylbenzene-α,α'-dicarboxylic Acid (derivative); Benzoic acid, 4-[2-(4-ethynylphenyl)ethynyl]-; TEPBA (abbreviation); Conjugated Diacetylene Benzoic Acid Derivative
EINECS	Contact for details

Quality Control

Our 4-((4-Ethynylphenyl)Ethynyl)Benzoic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity verification, NMR and IR for structural confirmation, and residual solvent analysis. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all specifications and test results to ensure traceability and compliance with your research or production requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This compound is light-sensitive (store away from light) and may be hygroscopic (moisture-sensitive). For long-term storage, consider storing under an inert atmosphere such as argon or nitrogen to prevent potential oxidation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0% (Area %)
Melting Point	Contact for details
Water Content (KF)	≤ 0.5% w/w
Residual Solvents (GC)	Meets ICH guidelines

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.