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Interfacial Charge Transfer between Zinc Oxide Nanoparticles and Methyl Viologen: Influence of Size
Author(s) -
Mitra Piyali,
Barman Monoj Kumar,
Basu Samita,
Das Somnath,
Pramanik Amitava,
Patra Amitava
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701938
Subject(s) - photoluminescence , flash photolysis , nanoparticle , materials science , photochemistry , quenching (fluorescence) , viologen , zinc , molecule , ultrafast laser spectroscopy , photoinduced electron transfer , electron transfer , nanocrystal , spectroscopy , fluorescence , chemical engineering , nanotechnology , chemistry , optoelectronics , kinetics , organic chemistry , optics , physics , quantum mechanics , reaction rate constant , metallurgy , engineering
The fundamental understanding of photoinduced electron transfer (PET) between semiconductor nanocrystals and dye molecules is very important to design efficient light harvesting system based on inorganic‐organic hybrid system. Here, we have investigated the photoluminescence quenching and charge transfer process from ZnO NPs to methyl viologen (MV 2+ ) by using steady state and time resolved spectroscopy. Absorption spectroscopic studies reveal that the charge‐transfer (CT) complex is formed between ZnO NPs and MV 2+ which gives distinct size dependent CT bands. The defect emission of ZnO NPs is found to be quenched significantly after adding MV 2+ molecule. The charge transfer process between ZnO NPs and MV 2+ is confirmed by using laser flash photolysis and the stability of CT complexes is found to be more prominent for 6.3 nm ZnO NPs with MV 2+ than 4.2 nm ZnO NPs with MV 2+ . The study of the electronic interaction of ZnO NPs with MV 2+ is very important for further applications in organic/inorganic hybrid optoelectronic materials.