Thieno[3,2-b]thiophene

Synonym(s):1,4-Dithiapentalene;1,4-Thiophthene

CAS NO.：251-41-2
Empirical Formula: C6H4S2
Molecular Weight: 140.23
MDL number: MFCD00179479
SAFETY DATA SHEET (SDS)
Update Date: 2025-08-18 19:12:29

What is Thieno[3,2-b]thiophene?

Description

Thieno[3,2-b]thiophene, also known as thienothiophene (TT), is a heterocyclic compound. It belongs to the family of fused thiopehenes and is widely used as an intermediate for the synthesis of small molecules and polymers in the application of organic field-effect transistors (OFETs) and organic photovoltaic devices (OPV).

Chemical properties

White to yellow Solid

The Uses of Thieno[3,2-b]thiophene

TT may be used as conjugated side chains in the synthesis of donor-acceptor copolymers. It finds potential applications in the enhancement of power conversion efficiency (PCE) for organic solar cells.

General Description

Thieno(3,2-b)thiophene (TT) is an electron rich conjugated polymer that has a quinoidal structure with a narrow band gap. It facilitates a strong intermolecular networking.

Properties of Thieno[3,2-b]thiophene

Melting point:	56 °C
Boiling point:	71 °C / 1mmHg
Density	1.367±0.06 g/cm3(Predicted)
Flash point:	98℃
storage temp.	Keep in dark place,Sealed in dry,Room Temperature
solubility	soluble in Methanol
form	powder to crystal
NIST Chemistry Reference	Thieno[3,2-b]thiophene(251-41-2)
color	White crystals

Safety information for Thieno[3,2-b]thiophene

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.