TCI H0619 2,4-Hexadiyne-1,6-diol is a symmetrical diacetylene compound carrying a hydroxyl group at each end of its chain. The structure contains two conjugated triple bonds, which makes it a distinctive material in materials chemistry laboratories, because a diacetylene framework is able to undergo topochemical polymerisation in the solid state when triggered by ultraviolet light or controlled heating. The product of that reaction is polydiacetylene, a coloured conjugated polymer that has been widely studied for its ability to change colour in response to temperature, pressure, solvent, or specific molecular interactions.
The characteristic that leads researchers to select this compound is the combination of a topochemically reactive diacetylene chain with two terminal hydroxyl groups that are easy to modify. The hydroxyl groups can be esterified, converted into urethanes, or transformed into leaving groups, so that a researcher can control how the molecules pack within the crystal lattice — the very factor that determines whether solid-state polymerisation succeeds or fails. Its symmetry also simplifies the interpretation of NMR and infrared spectra, since equivalent halves of the molecule reduce the number of distinct signals that must be assigned. As a bifunctional monomer, the compound can likewise be used to build polyesters or polyurethanes that contain diacetylene segments in the main chain.
In Indonesian laboratories, this building block is typically found in university and institutional research groups working on functional polymers, sensor materials, and organic synthesis. It is normally purchased in small research quantities for exploratory work rather than for production, and is handled at the bench during derivatisation steps, crystallisation trials, and subsequent solid-state polymerisation experiments. Characterisation is usually carried out in-house using spectroscopic methods available in the same laboratory.
- Topochemical solid-state polymerisation studies — the conjugated diacetylene framework polymerises under ultraviolet irradiation or controlled heating, giving researchers direct access to polydiacetylene without solution-phase initiators.
- Preparation of colorimetric and thermochromic sensor materials — the resulting polydiacetylene changes colour in response to temperature, pressure, solvent, or specific molecular interactions, which is the basis of visual sensing.
- Bifunctional monomer for step-growth polymerisation — the two terminal hydroxyl groups allow incorporation into polyesters and polyurethanes that carry diacetylene segments within the main polymer chain.
- Crystal engineering and molecular packing investigations — derivatising the hydroxyl ends lets researchers deliberately tune lattice packing, the parameter that ultimately decides whether solid-state polymerisation proceeds successfully.
- Synthetic building block for further functionalisation — the hydroxyl groups can be esterified, converted to urethanes, or turned into leaving groups, supporting multi-step routes toward more elaborate diacetylene targets.
| Brand | TCI |
|---|---|
| CAS number | 3031-68-3 |
| Molecular formula | — |
| Purity | — |
| Category | Chemistry > Building Blocks > Non-Heterocyclic Building Blocks |
| Pack sizes | available in standard research-scale pack sizes; please confirm the currently listed packaging option when ordering. |
| Physical form | — |
| Storage | store according to the conditions stated on the manufacturer's label and safety data sheet. |
- Product Code: H0619
Store the compound in its original tightly closed container, kept in a cool, dry, and well-ventilated area away from heat sources and direct sunlight, since diacetylene compounds can be sensitive to light and warmth. Amber glass or the supplier's original packaging is suitable, and containers should be resealed promptly after weighing to limit moisture uptake. Handle the material inside a fume hood while wearing safety glasses, gloves, and a laboratory coat, and avoid generating dust during transfer. Always consult the manufacturer's safety data sheet for the authoritative handling, storage, and disposal requirements before use.
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