Pembayaran hanya melalui request quotation dan dilakukan setelah tim kami menghubungi Anda. Mohon cantumkan nomor WhatsApp aktif untuk konfirmasi pesanan & pembuatan invoice. Estimasi pengiriman 4-5 minggu setelah pembayaran.
Description
2,5-Dibromoselenophene is a heterocyclic building block consisting of a selenophene ring carrying bromine atoms at both alpha positions. Selenophene is the analogue of thiophene in which the sulfur atom has been replaced by selenium, and this substitution brings changes in electronic character that are of considerable interest to researchers working on organic materials. With two bromine atoms available as ready-made connection points, this compound serves as an important monomer and synthetic intermediate in the construction of conjugated systems, ranging from semiconducting oligomers and polymers through to small molecules designed for organic electronic devices and photophysical research.
The properties that make it a preferred choice are the reactivity of the carbon-bromine bonds at the 2 and 5 positions, which are very well suited to palladium-catalysed coupling reactions such as Suzuki, Stille, and Sonogashira, as well as to metal-catalysed polymerisation. The symmetry of these two positions makes it straightforward to build regular conjugated chains without competing substitution patterns. The presence of the selenium atom, which is larger and more readily polarised than sulfur, tends to narrow the band gap and to strengthen interchain interactions, so the selenophene ring is often selected when researchers wish to shift absorption behaviour.
In Indonesian laboratories, this building block is typically used within university and institutional research groups working on organic semiconductors, conjugated polymers, and materials chemistry, where it is handled on a small synthetic scale under inert atmosphere. It is normally purchased in research quantities for reaction development and monomer synthesis rather than for production work, and it is stored alongside other halogenated heterocyclic intermediates in a controlled chemical store for use in coupling and polymerisation studies.
Laboratory Applications
- Suzuki coupling reactions: the two alpha carbon-bromine bonds react cleanly with boronic acids and esters under palladium catalysis, giving symmetrical or extended selenophene-containing conjugated products.
- Stille coupling reactions: the dibrominated positions pair well with organostannane partners, allowing selenophene units to be inserted into conjugated backbones where boron chemistry is unsuitable.
- Sonogashira coupling reactions: reaction with terminal alkynes at both bromine positions builds alkyne-bridged conjugated architectures that extend electron delocalisation across the selenophene core.
- Metal-catalysed polymerisation: the symmetrical difunctional structure makes this compound a practical monomer for preparing regular semiconducting polymers with selenophene repeat units in the chain.
- Organic electronic and photophysical research: the compound serves as an intermediate towards small molecules and oligomers whose absorption behaviour and interchain interactions are studied for device applications.
Specifications
- Brand: TCI
- Product code: D4028
- CAS number: 1755-36-8
- Chemical name: 2,5-Dibromoselenophene
- Category: Chemistry > Building Blocks > Heterocyclic Building Blocks
- Pack sizes: available in standard research pack sizes as listed by the manufacturer; please confirm the required quantity when ordering
- Storage: keep in a cool, dark place in a tightly closed container, following the manufacturer's storage instructions on the label
Handling and Storage
Store the container tightly closed in a cool, dark, and well-ventilated place, away from heat, ignition sources, and incompatible materials, and follow the storage conditions stated on the manufacturer's label and safety data sheet. Keep the material in its original container or in a compatible tightly sealed amber glass container to limit exposure to light and moisture. Handle in a fume hood using gloves, safety glasses, and a laboratory coat, avoid inhalation of dust or vapour and contact with skin and eyes, and transfer the compound under inert atmosphere where the experimental protocol requires it. Dispose of residues and contaminated materials as chemical waste in accordance with institutional procedures, and consult the safety data sheet before first use.
![6-Bromobenzo[b]thiophene (CAS 17347-32-9) - TCI B5523 - AMI Scientific](http://amiscientific.com/cdn/shop/files/TCI2510B5523.jpg?v=1767092466&width=533)
![Benzo[b]benzo[4,5]thieno[2,3-d]thiophene (CAS 248-70-4) - TCI B5551 - AMI Scientific](http://amiscientific.com/cdn/shop/files/TCI2510B5551.jpg?v=1768815817&width=533)
