Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.345, 545-550, 2000
Photochromic behavior of isochromenes (1H-benzopyrans) as studied by transient absorption spectroscopy
3-Phenyl- and 3-(2-naphthyl)isochromene show light-intensity-dependent photochromic behavior; the excitations with low- and high-intensity laser pulses produce isomeric open forms by way of one-photon and two-photon processes, respectively, their lifetimes being in the hundred-nanosecond and hundred-microsecond orders, respectively.