Description

Pyridine, 3,5-Diethynyl- (9Ci) is a specialized heterocyclic building block characterized by its pyridine core functionalized with two ethynyl groups. This compound matters for its role as a key precursor in advanced materials science and pharmaceutical research, offering unique reactivity for cross-coupling and polymerization reactions. It is primarily needed by R&D chemists and process engineers in the fields of organic electronics, polymer chemistry, and medicinal chemistry for developing novel functional materials and active pharmaceutical ingredients (APIs).

Application

• Organic Electronic Materials: A critical monomer for the synthesis of conjugated polymers and small molecules used in organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and field-effect transistors (OFETs).
• Pharmaceutical Intermediates: Serves as a versatile building block in the synthesis of complex drug candidates, particularly those requiring rigid, linear architectures for targeted biological activity.
• Coordination Chemistry & Catalysis: Used to create novel ligands for metal-organic frameworks (MOFs) and homogeneous catalysts, leveraging the nitrogen atom and ethynyl groups for metal binding.
• Advanced Polymer Synthesis: Employed in step-growth polymerization reactions, such as Sonogashira coupling, to produce high-performance poly(aryleneethynylene)s with tailored optical and electronic properties.
• Chemical Sensing Probes: Incorporated into molecular scaffolds for the development of fluorescent or colorimetric sensors due to its modifiable photophysical characteristics.
• Surface Functionalization: Utilized for modifying material surfaces through "click" chemistry, enabling the attachment of functional molecules to nanoparticles, electrodes, or other substrates.

Basic Information

Product Name	Pyridine, 3,5-Diethynyl- (9Ci)
CAS No.	67227-90-1
Molecular Formula	C9H5N
Molecular Weight	127.15 g/mol
Synonyms	3,5-Diethynylpyridine; 3,5-Bis(ethynyl)pyridine; Pyridine, 3,5-diethynyl-; 1-Ethynyl-3-(2-pyridyl)benzene (related isomer); 3,5-Diethynyl-pyridine; 3,5-Pyridinediylbis(ethyne)
EINECS	Contact for details

Quality Control

Our Pyridine, 3,5-Diethynyl- (9Ci) is produced under stringent conditions to ensure batch-to-batch consistency and high purity for research and development applications. Quality is verified through comprehensive analytical techniques including HPLC, GC, NMR, and mass spectrometry. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) at controlled room temperature (15-25°C) in a cool, dry, and well-ventilated place. Keep away from strong acids, oxidizing agents, and sources of ignition. Due to its sensitive nature, minimize exposure to air and moisture during handling.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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