Photosensitization Dynamics of Stable Copper Nanoclusters inside the Aqueous Core of Reverse Micelles with Different Pool Sizes
| Autor: | Pradipta Purkayastha, Soumyadip Bhunia, Manish Mukherjee |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Materials science 02 engineering and technology Surfaces and Interfaces Electron acceptor 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Instability Micelle Fluorescence Photoinduced electron transfer 0104 chemical sciences Core (optical fiber) Metal chemistry visual_art Electrochemistry visual_art.visual_art_medium General Materials Science 0210 nano-technology Spectroscopy |
| Zdroj: | Langmuir. 37:3500-3507 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | The perennial problem of instability of fluorescent copper nanoclusters (Cu NCs), stemming principally from aerial oxidation, has prevented their vivid usage in energy harvesting compared to the other metal NCs. However, replacement of the much expensive metal NCs with the cheaper Cu NCs is desirable if the functions are met with. Although thiolate protection of Cu NCs could bring some stability to them, appreciably decentlystable Cu NCs were produced inside the aqueous core of reverse micelles (RMs). However, this recent development has not been further explored on the photosensitization of the Cu NCs inside the RMs and their controlled modulation as energy antenna. Here we have synthesized stable Cu NCs inside the aqueous core of RMs with three different pool sizes and established photoinduced electron transfer (PET) to an electron acceptor. Considering the bulk quencher concentration, it appears that the extent of PET increases with decrease in the size of the aqueous core of RMs. However, calculating the effective concentration of the electron acceptor inside the RMs and considering the polarity of the microheterogeneous systems, it becomes clear that the extent of PET actually decreases with decrease in the size of the aqueous pool (w0, i.e., [H2O]/[AOT]) = 5-20) in the RMs. This proof of concept and the results are promising toward applications in PET-driven phenomena such as solar cells or batteries. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|