Photochromism in Furylfulgide Single Crystal under High Pressures

✍ Scribed by T. Sekiya; T. Fujita; S. Ohta; S. Kurita

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 166 KB
• Volume: 223
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/1521-3951(200101)223:1<355::aid-pssb355>3.0.co;2-r

✦ Synopsis

The pressure effect on single crystals of photochromic furylfulgide, [2-[1-(2,5-dimethyl-3-furyl)-2methylpropylidene]-3-isopropylidenesuccinic anhydride], has been investigated up to about 5 GPa through the measurement of absorption spectra at room temperature. The absorption edge of the opened-ring (E-form) molecules in single crystal at about 2.6 eV shifts to lower energy with increasing pressure. The absorption band corresponding to the closed-ring (C-form) molecules is observed in the range of 2.0-2.6 eV and shows a red-shift with increasing pressure. The photo-induced reversible isomerization was observed under high pressures, as is the same as under the atmospheric pressure. Pressure-induced transition to C-form molecules was observed when the pressures were over 2.5 GPa.