Preparation and optical characteristics of layered perovskite-type lead-bromide-incorporated azobenzene chromophores
摘要:
Lead bromide-based layered perovskite powders with azobenzene derivatives were prepared by a homogeneous precipitation method. From the diffuse reflectance (DR) and photoluminescence (PL) spectra of the hybrid powder materials, the present hybrids exhibited sharp absorption and PL peaks originating from excitons produced in the PbBr42- layer. When the present hybrid powder was irradiated with UV light at 350 nm, the absorption band from the trans-azobenzene chromophore, observed around 350 nm, decreased, while the absorption band from the cis-azobenzene chromophore, observed around 450 nm, increased. These results indicate that azobenzene chromophores in the present hybrid materials exhibit reversible photoisomerization. Moreover, it was found that the PL intensity from the exciton also varied due to photoisomerization of the azobenzene chromophores in the present hybrid. Thus, for the first time we succeeded in preparing the azobenzene derivative lead-bromide-based layered perovskite with photochromism before and after UV light irradiation. (c) 2012 Elsevier Inc. All rights reserved.
Intercalation and Photochemical Behavior of Azobenzene Derivatives with Layered Polymer Crystals as the Organic Host
作者:Shinya Oshita、Akikazu Matsumoto
DOI:10.1246/cl.2003.712
日期:2003.8
A photofunctional organic solid was fabricated by the intercalation of azobenzene derivatives containing an amino group into poly(muconic acid) as the layered polymer crystals. The organic intercalation and photoisomerization behaviors depended on the structure of the spacer between the azobenzene and amino groups of the guest.