Photochromism of 4-Oxazolyl Fulgides

Abstract

The thermal and photochemical stabilities of 2-[1-(2-phenyl-5-methyl-4-oxazolyl)]alkylidenesuccinic anhydrides (1) and (2) were studied. These compounds showed good thermal stabilities in PMMA film and low photochemical fatigue (PF≤0.03% /cycle) in a dilute toluene solution in the presence of air, compared with 3-furyl fulgide (3). Although in PMMA film the photochemical fatigue resistance property of the fulgides was poor, in comparison with that in solution, the addition of an organo-nickel stabilizer improved the property.

A photon‐mode full‐color rewritable image using photochromic compounds

“…7 Its absorption spectrum revealed a maximum absorption around 460 nm and excellent yellow hue, compared with those of conventional fulgides. 8 2-[1-(1-phenyl-2,5-dimethyl-3-pyrrolyl)ethylidene]-3-isopropylidene-succinic acid anhydride (denoted as PPF) was used as the cyan material. 9 Three types of fulgides, 2-[1-(2,5-dimethyl-3-furyl)-1-isopropylethylidene]-3-adamantyl idene-succinic acid anhydride (denoted as FAF), 10 2-[1-(2,5dimethyl-3-thienyl)ethylidene]-3-isopropylidene-succinic acid anhydride (denoted as TF), 11 and 2-[1-{5-methyl-2-(4-dimethylaminophenyl)-4-oxazolyl}ethylidene]-3-isopropylidene-succinic acid anhydride (denoted as DMAPOF) 12 were examined as magenta materials.…”

Introduction: Organic Photochromic Molecules

“…Substituting hydrogen wherever this atom can be involved in a side reaction, is an answer to avoid it. The same design is applied in fulgides [91].…”

Multi-level recording of photochromic indolylfulgide

“…Fulgides, first reported by Stobbe [2], are a class of photochromic compounds that meets many stringent requirements for optical memory use, such as distinguishable absorption spectra for the interconverted colored forms, efficient photoreaction, fatigue resistance, and thermal and photochemical stability. They have therefore been extensively investigated on the synthesis, properties, and potential photoelectronic applications [3][4][5][6][7][8][9][10]4,11]. Indolylgides are in particular one of the most important photochromic compounds in fulgide family, have been explored as promising candidates for optical memory and switches due to their outstanding photochemical fatigue resistance and thermally irreversible properties relative to other fulgides.…”

“…Indolylgides are in particular one of the most important photochromic compounds in fulgide family, have been explored as promising candidates for optical memory and switches due to their outstanding photochemical fatigue resistance and thermally irreversible properties relative to other fulgides. [6,9,10,4,11].…”