BDTT-Sn - CAS: 1352642-37-5

2,6-Bis(trimethyltin)-4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene (commonly known as BDTT-Sn or BDT-Th-Sn, CAS: 1352642-37-5) is widely regarded as the ultimate star molecule among electron-donating (Donor) core 2D large conjugated building blocks. It is explicitly categorized as an Organic Photovoltaic (OPV) Cell Intermediate Material.

• The Golden Monomer for OPV Polymers: Functions as the most crucial distannylated donor unit in Stille cross-coupling polycondensations. It is the absolute, irreplaceable precursor for synthesizing world-renowned, high-performance donor polymers such as PM6, PBDB-T, and PTB7-Th.

• Flawless Energy-Level and Crystal Tuning: The flanking thiophene substituents on the benzodithiophene (BDT) core significantly expand the \(\pi \)-\(\pi \) conjugated plane. This not only lowers the HOMO level to generate superior open-circuit voltage (\(V_{oc}\)) but also drives polymers to form highly favorable "face-on" orientations, maximizing charge carrier mobility and overall Power Conversion Efficiency (PCE).

• Excellent Solution Processability: The branched alkyl chains grant final polymers premium solubility in eco-friendly and industrial solvents such as chlorobenzene (CB) and ortho-dichlorobenzene (o-DCB), perfectly matching the high-throughput demands of roll-to-roll printing for flexible printed electronics.

• 99% Ultra-High Purity (Electronic Polymerization Grade): Refined via specialized, localized multi-stage crystallization. Monostannylated defects, trace metal residues, and process impurities are strictly restricted. This yields perfect structural symmetry and a precise stoichiometric ratio, guaranteeing consistent, high molecular weight (Mn/Mw) propagation in Stille polycondensations, completely preventing the batch-to-batch efficiency drop caused by sub-par monomer purity.

• Scarce Industrial Capacity (500g/Month): We eliminate the market bottleneck of "frequent stockouts, erratic quality, and minor gram-scale limits." Our standardized, continuous scale-up facilities guarantee a stable output of 500g per month, supporting everything from quick milligram-scale R&D sampling to bulk commercial procurement.

• Anaerobic & Ultra-Dry Protective Glovebox Packaging: Organotin monomers are highly vulnerable to degradation when exposed to oxygen, moisture, light, or trace acids. To counteract this, all dividing and sealing steps are executed inside ultra-clean nitrogen-flushed gloveboxes with moisture and oxygen thresholds kept under 1 ppm. Airtight, light-proof fluorinated containers wrapped in parafilm guarantee absolute zero-activity loss during international shipping.

• Rigorous Quality Control (QbD): Produced under rigid quality management structures. Every single commercial dispatch comes complete with a thorough testing booklet comprising a COA (Certificate of Analysis), HPLC/GC (Purity Analysis), and high-resolution H-NMR/Sn-NMR (Tin-119 NMR) charts to guarantee complete chemical and structural traceability.

• Chemical Name: 2,6-Bis(trimethyltin)-4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene / BDTT-Sn / BDT-Th-Sn

• CAS Registry Number: 1352642-37-5

• Functional Category: Organic Photovoltaic Cell Intermediate Material / Organic Semiconductor Building Block [1]

• Molecular Formula: C₃₈H₅₄S₄Sn₂

• Molecular Weight: 900.51

• Appearance: Pale yellow, bright yellow, to light green powder or crystals.

• Assay / Purity: ≥ 99.0% (HPLC)

• Storage Conditions: Store at -20°C (or 2-8°C), tightly sealed, nitrogen-blanketed, and strictly protected from light and moisture. Keep clear of acidic environments or strong oxidizing agents.

• Production Capability: 500 g / Month

• Standard Packaging: 250mg/vial, 500mg/vial, 1g/vial, 5g/vial, 10g/vial, 50g/specialized fluorinated container (Customized packaging available upon request).