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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tuned charge-transfer between ceria and 1,4,5,8-naphthaldiimide as a function of pH

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Author(s):
da Silva, Fatima Chagas [1, 2] ; Pinheiro da Silva, Mauro Francisco [1, 2, 3] ; Briotto Filho, Decio [1, 2] ; Politi, Mario Jose [1, 2] ; Bacani, Rebeca [4] ; Triboni, Eduardo Rezende [5]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Biochem Dept, Lab Photochem & Fast Kinet, Inst Chem, Sao Paulo - Brazil
[2] Univ Sao Paulo, Chem Dept, Lab Photochem & Fast Kinet, Inst Chem, Sao Paulo - Brazil
[3] Univ Brasilia, Campus FUP, BR-73345010 Brasilia, DF - Brazil
[4] Univ Sao Paulo, Dept Mat, Escola Engn Lorena, Lorena - Brazil
[5] Univ Sao Paulo, Lab Photochem & Funct Mat, Sch Chem Engn, Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Luminescence; v. 194, p. 240-247, FEB 2018.
Web of Science Citations: 1
Abstract

In this study, cerium oxide CeO2 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 CeO2 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 CeO2 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 CeO2 that accounts for the new photoactivities observed. (AU)

FAPESP's process: 15/06064-6 - Functional organic molecules and inorganic oxides for the development of new materials
Grantee:Eduardo Rezende Triboni
Support Opportunities: Regular Research Grants
FAPESP's process: 13/08166-5 - Interfacial chemistry: drugs, peptides and ezymes interactions with membrane models
Grantee:Iolanda Midea Cuccovia
Support Opportunities: Research Projects - Thematic Grants