33895-37-3

Basic information

• Product Name: pyren-1-ylmethyltriphenylphosphonium bromide
• Synonyms: pyren-1-ylmethyltriphenylphosphonium bromide
• CAS NO: 33895-37-3
• Molecular Weight: 557.469
• Mol File: 33895-37-3.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: pyren-1-ylmethyltriphenylphosphonium bromide(CAS DataBase Reference)
• NIST Chemistry Reference: pyren-1-ylmethyltriphenylphosphonium bromide(33895-37-3)
• EPA Substance Registry System: pyren-1-ylmethyltriphenylphosphonium bromide(33895-37-3)

Safety Data

• Hazardous Substances Data: 33895-37-3(Hazardous Substances Data)

Upstream product

• 2595-90-6 1-bromomethylpyrene 
• 603-35-0 triphenylphosphine 
• 24463-15-8 1-pyrenemethanol 
• 3029-19-4 pyrene-1-aldehyde 

Downstream Products

• 33895-39-5 C₅₂H₃₃OP 

Relevant articles and documents

Highly selective cis-trans photoisomerization of 1-pyrenylethylenes: Relations between the modes of isomerization and potential energy surfaces

Among 1-pyrenylethylenes with an alkyl (t-butyl) or an aryl (phenyl) group on the ss ethylenic carbon, 1-(3,3-dimethyl-1-butenyl)pyrene (BP) undergoes cis-to-trans one-way isomerization on benzil sensitization, whereas 1-styrylpyrene (SP) undergoes mutual isomerization between the cis and trans isomers to afford an extremely high photostationary state composition (98%) of the trans isomer. Transient spectroscopy and measurements of the isomerization quantum yields revealed that the trans triplet state is the most stable and populated conformation on the triplet energy surface for both BP and SP; however, a higher degree of stabilization of the trans conformation for BP than for SP compared to the perpendicularly twisted conformation makes BP and SP one-way and two-way isomerizing, respectively.