195-06-2Relevant academic research and scientific papers
Multiple Fused Anthracenes as Helical Polycyclic Aromatic Hydrocarbon Motif for Chiroptical Performance Enhancement
Fujise, Kei,Tsurumaki, Eiji,Fukuhara, Gaku,Hara, Nobuyuki,Imai, Yoshitane,Toyota, Shinji
, p. 2456 - 2461 (2020)
Polycyclic aromatic hydrocarbons consisting of three fused anthracene units were designed as new π-conjugated compounds having helical structures. These expanded helicenes were synthesized by Pt-catalyzed cycloisomerization of the corresponding ethynyl-su
Picosecond time-resolved fluorescence spectroscopy of (Z)-1-(2-anthryl)-2-phenylethene and its model compounds: Understanding the photochemistry by distinguishing between the s-cis and s-trans rotamers
Karatsu, Takashi,Itoh, Hajime,Nishigaki, Atsuko,Fukui, Keijiro,Kitamura, Akihide,Matsuo, Shigeki,Misawa, Hiroaki
, p. 6993 - 7001 (2000)
The photochemical reactions (Z-E isomerization and photocyclization) of the s-cis and s-trans rotamers of (Z)-1-(2-anthryl)-2-phenylethene (Z2APE) were investigated. The absorption, steady-state and picosecond time-resolved fluorescences, and transient absorption spectra were measured in order to achieve a better understanding of the rotamer photochemistry. The spectra were compared with those of the model compounds ((Z)-1-[2-(1-methylanthryl)]-2-phenylethene: Z1Me2APE and (Z)-1-[2-(3-methylanthryl)]-2-phenylethene: Z3Me2APE). It is confirmed that the s-trans rotamer undergoes only Z→E adiabatic isomerization and that the s-cis rotamer mainly photocyclizes to give the dihydrophenanthrene-type intermediate with a much faster rate constant (kcyc = 2.3×1010 s-1). The reason Z2APE does not give an aromatized photocyclization product (1,2-naphtho[a]anthracene, NA) is that the return of the dihydrophenanthrene-type intermediate to the Z isomer is much faster than the oxidation to produce NA.
Temperature and solvent effects on rotamer-specific photobehaviour of the cis and trans isomers of 2-styrylanthracene
Spalletti, Anna,Bartocci, Giampiero
, p. 5623 - 5632 (2007/10/03)
The photochemical and photophysical behaviour of the two stereoisomers of 2-styrylanthracene (2-StAn) has been investigated as a function of temperature and solvent polarity. The photobehaviour of both the trans and cis isomers markedly depends on the su
