112440-50-3

Basic information

• Product Name: TRANS-1,2-DICYANO-1,2-BIS(2,4,5-TRIMETHYL-3-THIENYL)ETHENE
• Synonyms: TRANS-1,2-DICYANO-1,2-BIS(2,4,5-TRIMETHYL-3-THIENYL)ETHENE;1,2-BIS(2,4,5-TRIMETHYL-3-THIENYL)-TRANS-1,2-DICYANOETHENE;(2E)-2,3-Bis(2,4,5-trimethyl-3-thienyl)-2-butenedinitrile;2,3-Bis(2,4,5-trimethyl-3-thienyl)fumaronitrile;trans-1,2-Dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl)ethene
• CAS NO: 112440-50-3
• Molecular Formula: C18H18N2S2
• Molecular Weight: 326.48
• EINECS: 691-461-2
• Mol File: 112440-50-3.mol
• Article Data: 1

Chemical Properties

• Melting Point: 167 °C
• Boiling Point: 441.5±45.0 °C(Predicted)
• Appearance: /
• Density: 1.183±0.06 g/cm3(Predicted)
• Solubility: soluble in Methanol
• CAS DataBase Reference: TRANS-1,2-DICYANO-1,2-BIS(2,4,5-TRIMETHYL-3-THIENYL)ETHENE(CAS DataBase Reference)
• NIST Chemistry Reference: TRANS-1,2-DICYANO-1,2-BIS(2,4,5-TRIMETHYL-3-THIENYL)ETHENE(112440-50-3)
• EPA Substance Registry System: TRANS-1,2-DICYANO-1,2-BIS(2,4,5-TRIMETHYL-3-THIENYL)ETHENE(112440-50-3)

Safety Data

• RIDADR: 3439
• HazardClass: 6.1
• PackingGroup: III
• Hazardous Substances Data: 112440-50-3(Hazardous Substances Data)

Usage

General Description

TRANS-1,2-DICYANO-1,2-BIS(2,4,5-TRIMETHYL-3-THIENYL)ETHENE is a chemical compound with the molecular formula C26H24N2S2. It is a derivative of ethene and contains two cyano (CN) groups and two 2,4,5-trimethyl-3-thienyl groups. TRANS-1,2-DICYANO-1,2-BIS(2,4,5-TRIMETHYL-3-THIENYL)ETHENE is known for its fluorescent properties and has been studied for its potential applications in organic light-emitting diodes and other optoelectronic devices. It is also used as a building block for the synthesis of other organic compounds. TRANS-1,2-DICYANO-1,2-BIS(2,4,5-TRIMETHYL-3-THIENYL)ETHENE is a commercial product and is available for use in research and industrial applications.

Upstream product

• 112440-46-7 cis-1,2-dicyano-1,2-bis(2',4',5'-trimethyl-3'-thienyl)ethene 

Downstream Products

• 112440-46-7 cis-1,2-dicyano-1,2-bis(2',4',5'-trimethyl-3'-thienyl)ethene 

Relevant articles and documents

Spectral, conformational and photochemical analyses of photochromic dithienylethene: Cis-1,2-dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl)ethene revisited

The conformational equilibrium and thermodynamic parameters of cis-1,2-dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl)ethene (1a) and its trans derivative 1c are presented. Irradiation of both compounds was carried out by using 365 nm light, which affects the cis/trans isomerisation process, whereas irradiation with 405 nm light preferentially promotes the formation of the cyclised product. Prolonged irradiation of 1a at 365 nm leads to the formation of a new derivative showing photochromic properties. Evidence for the formation of the novel derivative is presented, and details of its photochromic properties were investigated; a tentative mechanism has also been proposed. The equilibrium between parallel and antiparallel forms of cis- and trans-1,2-dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl)ethene was studied by NMR spectroscopy. Photocyclisation or cis/trans isomerisation was induced by irradiation with 405 or 365 nm light. Extended irradiation of the cis compound generated two peroxy derivatives that thermally convert into a new coloured compound with its own photochromic properties. Copyright