175202-58-1

Basic information

• Product Name: 3,4-DIMETHYLTHIENO[2,3-B]THIOPHENE
• Synonyms: 3,4-DIMETHYLTHIENO[2,3-B]THIOPHENE;3,4-DIMETHYLTHIENO(B)THIOPHENE;BUTTPARK 33\11-63;3,4-DIMETHYLTHIENO(B)THIOPHENE 97%
• CAS NO: 175202-58-1
• Molecular Formula: C₈H₈S₂
• Molecular Weight: 168.28
• Mol File: 175202-58-1.mol
• Article Data: 4

Chemical Properties

• Melting Point: 72-74°C
• Boiling Point: 272.6°Cat760mmHg
• Flash Point: 86.4°C
• Appearance: /
• Density: 1.245g/cm³
• Vapor Pressure: 0.0101mmHg at 25°C
• Refractive Index: 1.671
• CAS DataBase Reference: 3,4-DIMETHYLTHIENO[2,3-B]THIOPHENE(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-DIMETHYLTHIENO[2,3-B]THIOPHENE(175202-58-1)
• EPA Substance Registry System: 3,4-DIMETHYLTHIENO[2,3-B]THIOPHENE(175202-58-1)

Safety Data

• Statements: 36/37/38
• Safety Statements: 26-36/37/39
• Hazardous Substances Data: 175202-58-1(Hazardous Substances Data)

Usage

General Description

3,4-DIMETHYLTHIENO[2,3-B]THIOPHENE is a chemical compound with the molecular formula C8H8S2. It is a thieno[2,3-b]thiophene derivative, which is commonly used as a building block in the synthesis of organic electronics and materials. 3,4-DIMETHYLTHIENO[2,3-B]THIOPHENE possesses two methyl (CH3) groups attached to the 3 and 4 positions of the thiophene ring, giving it unique electronic and structural properties. 3,4-DIMETHYLTHIENO[2,3-B]THIOPHENE is known for its electron-donating ability and has been used in various applications, including organic field-effect transistors, organic solar cells, and organic light-emitting diodes. Its properties make it a valuable component in the development of advanced materials for electronic and optoelectronic devices.

InChI:InChI=1/C8H8S2/c1-5-3-9-8-7(5)6(2)4-10-8/h3-4H,1-2H3

Upstream product

• 123-54-6 acetylacetone 
• 75-15-0 carbon disulfide 
• 75-07-0 acetaldehyde 
• 108-59-8 malonic acid dimethyl ester 
• 141-82-2 malonic acid 
• 105-53-3 diethyl malonate 
• 250-84-0 thieno[2,3-b]thiophene 
• 75-52-5 nitromethane 
• 152487-69-9 diethyl 3,4-dimethylthieno<2,3-b>thiophen-2,5-dicarboxylate 
• 175202-55-8 3,4-dimethylthieno[2,3-b]thiophene-2,5-dicarboxylic acid 

Relevant articles and documents

3,4-dimethylthiophene[2,3-b]thiophthene synthesis method

A 3,4-dimethylthiophene[2,3-b]thiophthene synthesis method includes steps: 1) mixing carbon disulfide, malonic ester and DMF, and heating to reflux; 2) adding a catalyst and 40-50wt% acetaldehyde aqueous solution into a mixed system obtained at the step 1), feeding shielding gas, heating the system to 150-180 DEG C, pressurizing to 4-7 atmospheric pressures, and performing reaction for 10-12h, wherein the catalyst refers to potassium fluoride loaded palladium on carbon; 3) separating and purifying to obtain a product. By conditions of self-made catalyst, pressurized reaction and the like, 3,4-dimethylthiophene[2,3-b]thiophthene can be synthesized by one-step reaction, and the reaction yield reaches 97% or above. In addition, a reaction process and aftertreatment operations are simple, and related raw materials are low in cost.

Synthesis, complexation, and fluorescence behavior of 3,4-dimethylthieno[2, 3-b]thiophene carrying two monoaza-15-crown-5 ether groups

A novel fluoroionophore 1 based on 3,4-dimethylthieno[2,3-b]thiophene bearing two monoaza-15-crown-5 ethers at 3- and 4-positions was prepared. UV-vis and fluorescence responses of compound 1 upon the addition of alkali and alkaline earth metal cations were evaluated in acetonitrile solution. Receptor 1 showed unique response for Ba2+ due to the formation of an intramolecular sandwich complex.