Bleaching kinetics of indoly-benzylfulgimide in PMMA

• Published in: Physica Status Solidi (b) Vol. 244; no. 4; pp. 1363 - 1375
• Main Authors: Rupp, Romano A., Zheng, Yuan, Wang, Yingli, Dong, Weibin, Menke, Neimule, Yao, Baoli, Zhao, Wei, Chen, Yi, Fan, Meigong, Xu, Jinjun, Fally, Martin
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag 01.04.2007; WILEY‐VCH Verlag; Wiley
• Subjects: 33.20.Kf; 78.40.−q; 82.50.Hp; 82.50.Nd; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physics; Time dependence; Gaussian beam; PMMA; Bleaching; Holography; Reaction rates; Kinetics; Absorption spectra; Optical constants; Photochemistry
• ISSN: 0370-1972; 1521-3951
• DOI: 10.1002/pssb.200642373

Indoly‐benzylfulgimide belongs to the photochromic fulgide family and follows photochemical first order kinetics. Its bleaching kinetics is investigated at 633 nm and 640 nm by spectroscopy, by the time dependence of transmission and of diffraction from holographically induced gratings. The non‐exponential decay law resulting for diffraction experiments with a Gaussian beam profile is calculated and verified experimentally. For a quasi‐homogeneous beam profile the time constant determined from diffraction decay is half the one for absorbance decay. The photochemical reaction rate of indoly‐benzylfulgimide in PMMA is (3.9 ± 0.3) cm2/J at 650 nm. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)