التفاصيل البيبلوغرافية
| العنوان: |
Tuned charge-transfer between ceria and 1,4,5,8-naphthaldiimide as a function of pH. |
| المؤلفون: |
Da Silva, Fátima Chagas1, Pinheiro Da Silva, Mauro Francisco1, Briotto Filho, Décio1, José Politi, Mário1 mjpoliti@usp.br, Bacani, Rebeca2, Rezende Triboni, Eduardo3 tribonier@usp.br |
| المصدر: |
Journal of Luminescence. Feb2018, Vol. 194, p240-247. 8p. |
| مصطلحات موضوعية: |
*CHARGE-transfer transitions, *CERIUM oxides, *IMIDES, *HYDROGEN-ion concentration, *CHARGE transfer, *NANOPARTICLES |
| مستخلص: |
In this study, cerium oxide CeO 2 was selected to exploit their applications with an also special class of organic compounds the naphthalene diimides. The 1,4,5,8-naphthaldiimides are known for their superior electrochemical activities comparable to those of Paraquat (Methyl Viologen) but with larger amplitude of photochemical applications. Cerium Oxide is a wide bandgap semiconductor well known for its catalytic capabilities and for its simple manipulation to prepare thin films and nanoparticles (NP). Aqueous suspensions containing positively charged diimide derivative N,N’-(N,N´-dimethylethyleneamine-N´´-butyl)−1,4,5,8-naphthaldiimide (NDI4) and NP of CeO 2 were investigated. The UV–vis and fluorescent spectra of the NDI4 showed distinct features compared to those of that in bulk that arises from the sorption on the ceria surface. NDI4 interacted in a special manner with NP of CeO 2 rendering a wide pH range hydrolytic inertness and novel photochromic behavior of the diimide. The organic dye is proposed to adsorb in the crevices of the NP and forming a charge transfer complex with CeO 2 that accounts for the new photoactivities observed. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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