4,7-Bis(2-bromo-5-thienyl)-2,1,3-benzothiadiazole - CAS: 288071-87-4
4,7-Bis(2-bromo-5-thienyl)-2,1,3-benzothiadiazole (commonly known as DTBT-Br2 or the Thiophene-Benzothiadiazole-Thiophene (TBT) core derivative, CAS: 288071-87-4) is an exceptionally classic and indispensable electron-withdrawing (Acceptor) and narrow-bandgap modifying core building block in the chemistry of organic electronics. It is explicitly categorized as an Organic Photovoltaic (OPV) Cell Intermediate Material.
Organic Photovoltaic (OPV) Intermediates: Acts as a fundamental dibrominated acceptor monomer for Stille or Suzuki cross-coupling polycondensations with various organotin or boronic ester donors. It is the vital precursor for synthesizing renowned low-bandgap donor polymers (such as the PCDTBT framework) and advanced non-fullerene acceptors.
Organic Field-Effect Transistors (OFETs): Its pristine coplanar architecture induces highly ordered intermolecular \(\pi \)-\(\pi \) stacking and minimizes film crystalline defects, which drastically enhances the charge carrier mobility of downstream thin-film transistors.
Near-Infrared Detection & Flexible Electronics: Its exceptional intramolecular charge transfer (ICT) kinetics remarkably narrow the optical bandgap of resulting materials, making it highly favored for engineering ultra-sensitive near-infrared photodetectors, flexible circuits, and electrochromic devices.
99% Ultra-High Purity (Polymerization Grade): Refined via specialized, high-resolution purification. Monobrominated defects, structural process impurities, and trace metal ions are strictly restricted. This yields perfect structural symmetry and absolute chemical cleanliness, guaranteeing consistent, high molecular weight (Mn/Mw) propagation in cross-coupling polycondensations, which drastically optimizes the power conversion efficiency (PCE) of downstream photovoltaic devices.
Stable Industrial Monthly Capacity (2kg/Month): We eliminate the market bottleneck of "unstable supply chains and minor catalog reagent constraints." Our standardized facilities guarantee a stable output of 2kg per month, supporting everything from bulk sampling to continuous commercial procurement.
Perfect Energy-Level Tuning Potential: The strong electron-deficient nature of the benzothiadiazole (BT) core is perfectly balanced by the flanking electron-rich thiophene units. This enables precise tuning of the HOMO/LUMO levels of downstream polymers, significantly optimizing the open-circuit voltage (\(V_{oc}\)) and short-circuit current (\(J_{sc}\)) of optoelectronic devices.
Rigorous Quality Control (QbD): Produced under rigid quality management structures. Every single dispatch is accompanied by a thorough testing booklet comprising a COA (Certificate of Analysis), HPLC/GC (Purity Analysis), and H-NMR charts to guarantee complete chemical and structural traceability.
Chemical Name: 4,7-Bis(2-bromo-5-thienyl)-2,1,3-benzothiadiazole / DTBT-Br2
CAS Registry Number: 288071-87-4
Functional Category: Organic Photovoltaic Cell Intermediate Material / Organic Semiconductor Building Block
Molecular Formula: C₁₄H₆Br₂N₂S₃
Molecular Weight: 458.21
Appearance: Orange, dark red, to bright orange-red crystalline powder.
Assay / Purity: ≥ 99.0% (HPLC)
Storage Conditions: Store at 2-8°C (or in a cool, dry place), tightly sealed, nitrogen-blanketed, and strictly protected from light and moisture.
Production Capability: 2 kg / Month
Standard Packaging: 1g/bottle, 5g/bottle, 10g/bottle, 50g/aluminum bag, 100g/light-proof fluorinated container, 1kg/vacuum-sealed drum (Customized packaging available upon request).