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Photophysical properties of cationic dyes captured in the mesoscale channels of micron-sized metal-organic framework crystals

Title
Photophysical properties of cationic dyes captured in the mesoscale channels of micron-sized metal-organic framework crystals
Authors
Choi I.-H.Bin Yoon S.Huh S.Kim S.-J.Kim Y.
Ewha Authors
김성진김영미
SCOPUS Author ID
김성진scopus; 김영미scopus
Issue Date
2018
Journal Title
Scientific Reports
ISSN
2045-2322JCR Link
Citation
vol. 8, no. 1
Publisher
Nature Publishing Group
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The optical properties of dye molecules in confined spaces can differ from the solution phase due to confinement effects. Pre-organized mesoscale channels of metal-organic frameworks (MOFs) are very suited for hosting various dyes, and the robust frameworks often render the encapsulated dyes with certain preferential geometries, which are different from those found in solution. Furthermore, pre-organized open channels can efficiently guide the uniform and unique spatial distribution of dye molecules in a controlled manner, which are otherwise difficult to achieve. Thus, sufficiently large dye molecules can avoid the formation of complex aggregates when captured inside open channels. In contrast, small dye molecules can form well-defined dimers or aggregates. The resulting dye-encapsulated MOFs can display unusual photophysical properties of the captured dyes. An anionic framework of In-BTB with mesoscale 3D channels is utilized for the efficient encapsulation of various cationic dyes through cation-exchange processes. Six different cationic dyes are encapsulated in the anionic framework of In-BTB, and their crystal structures are completely solved. Novel photophysical properties of these spatially distributed dye molecules in dye@In-BTBs are investigated. © 2018 The Author(s).
DOI
10.1038/s41598-018-28080-y
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자연과학대학 > 화학·나노과학전공 > Journal papers
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