Azobenzene‐Functionalized Cage Silsesquioxanes as Inorganic–Organic Hybrid,Photoresponsive, Nanoscale,Building Blocks |
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| Authors: | Prof. Hongzhi Liu |
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| Affiliation: | 1. Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100 (P. R. China), Fax: (+86)531 88364691;2. State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433 (P.R. China) |
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| Abstract: | Mono‐ and octa‐azobenzene‐functionalized cage silsesquioxanes were easily synthesized by the reaction of 4‐bromoazobenzene with monovinyl‐substituted octasilsesquioxane and cubic octavinylsilsesquioxane through the Heck coupling reaction. Excited‐state energies obtained from time‐dependent density functional theory (TDDFT) and the CAM‐B3LYP functional correlate very well with experimental trans–cis photoisomerization results from UV/Vis spectroscopy. These azobenzene‐functionalized cages exhibit good thermal stability and are fluorescent with maximum emission at approximately 400 nm, making them potential materials for blue‐light emission. |
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| Keywords: | azobenzene unit cage compounds photoresponsive behaviors silsesquioxanes time‐dependent DFT(TDDFT) |
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