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Description
1,2-Di(thiophen-2-yl)ethyne is a heterocyclic compound built from two thiophene rings joined by an internal alkyne bridge. This linear, rigid architecture makes it an important heterocyclic building block in the synthesis of conjugated materials. In the laboratory, the compound serves as a core scaffold for constructing thiophene-based oligomers and polymers, as a precursor for cyclization reactions leading to fused heterocyclic systems, and as a model molecule in studies of charge transport and electron interactions within sulfur-containing pi systems.
The property that makes this compound a preferred choice is the continuous conjugation extending across both thiophene rings through the triple bond. The alkyne bridge enforces a straight geometry and preserves relative coplanarity between the two rings, so that pi orbital overlap remains effective. The sulfur atoms of the thiophene rings contribute electron density and support intermolecular interactions that are useful in the ordering of thin films. In addition, the electron-rich triple bond is reactive toward cyclization triggered by electrophiles, transition metals, or photochemical conditions, opening routes toward thienothiophene and related fused frameworks.
In Indonesian laboratories, this building block is typically encountered in university and institutional research groups working on organic electronics, materials chemistry, and synthetic heterocyclic chemistry. It is generally handled in small quantities on the bench or in a fume hood, weighed out for multi-step synthetic sequences, and characterized by routine spectroscopic methods. Because the material is supplied by TCI in research-scale packaging, it suits method development, thesis-level projects, and exploratory synthesis rather than bulk production work.
Laboratory Applications
- Synthesis of conjugated oligomers and polymers: the rigid bis-thiophene alkyne core provides an extended conjugated segment that can be coupled or polymerized to build longer pi-conjugated chains.
- Precursor for cyclization to fused heterocycles: the electron-rich triple bond flanked by two thiophene rings responds to electrophilic, metal-mediated, and photochemical cyclization, giving access to thienothiophene-type frameworks.
- Charge transport model studies: the defined linear geometry and continuous conjugation make this molecule a clean reference system for investigating how charge moves through sulfur-containing pi systems.
- Thin film ordering and self-assembly investigations: sulfur atoms in the thiophene rings promote intermolecular contacts that researchers exploit when studying molecular packing and film morphology.
- Heterocyclic building block in multi-step synthesis: the compound functions as a preformed core onto which further functionalization is carried out toward more elaborate conjugated targets.
Specifications
- Brand: TCI
- Product code: E1637
- CAS number: 23975-15-7
- Chemical name: 1,2-Di(thiophen-2-yl)ethyne
- Category: Chemistry > Building Blocks > Heterocyclic Building Blocks
- Packaging and storage: supplied in research-scale packaging; store according to the conditions stated on the manufacturer label and Safety Data Sheet.
Handling and Storage
Store the container tightly closed in a cool, dry, well-ventilated place, away from heat sources, ignition sources, and direct sunlight, following the storage conditions stated on the manufacturer label and Safety Data Sheet. Keep the material in its original container or in a compatible tightly sealed glass container, clearly labelled, and protect it from moisture and prolonged exposure to air and light. Handle the compound in a fume hood using standard personal protective equipment, including safety glasses, gloves, and a laboratory coat. Avoid inhaling dust and avoid contact with skin and eyes. Separate the material from strong oxidizing agents and other incompatible chemicals, and consult the Safety Data Sheet before use and before disposal of residues.
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