What is it about?
New nanostructures can be obtained by self-assembling of molecules. However, these important processes are still largely unknown. For example it would be useful to know if channels with molecular-scale openings can help molecules to form ordered patterns, that is 'supramolecular structures' . Zeolite L contains many thousands of these nanochannels. We have loaded these nanochannels with dye molecules. We have seen that they organize in a unique supramolecular structure: the nanoladder. This shows that the zeolite may actually drive the self-assembling and organization of guest molecules.
Why is it important?
Dye molecules in zeolite L are promising system to build optical devices, with applications in solar energy harvesting, information technology and diagnostics/health. Their excellent optical properties derive just from the supramolecular organization of dye molecules inside the zeolite. What these molecules do when they are forced to be very close together has never been explored. For the first time, we created these conditions and realized an unprecedented supramolecular architecture (the dye-nanoladder). Also we understood why the nanoladder can form in these conditions. All this information is precious for further improving the performances of these very versatile composites.
Read the Original
This page is a summary of: Close-Packed Dye Molecules in Zeolite Channels Self-Assemble into Supramolecular Nanoladders, The Journal of Physical Chemistry C, July 2014, American Chemical Society (ACS), DOI: 10.1021/jp505600e.
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Article link at ResearchGate
Article link (free download) at ResearchGate
Noteworthy Chemistry - August 18 - American Chemical Society
Research highlights of ACS. It includes a very nice summary of this article ("Dye molecules form nanoladders in zeolite channels'', by Nancy McGuire).
Observed and calculated diffraction patterns and final difference curve from Rietveld refinements for all the synthesized dye-zeolite samples. Atomic coordinates, occupancy factors, and thermal displacement parameters for the dye-zeolite composites
Full Paper - Open Access
pdf file: Author version of this paper (Just Accepted Manuscript). Green open access.
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