Photoinduced Electron Transfer in Multicomponent Truxene-Quinoxaline Metal-Organic Frameworks

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dc.citation.issue18
dc.citation.volume34
dc.contributor.authorCornelio J
dc.contributor.authorLee SJ
dc.contributor.authorZhou T-Y
dc.contributor.authorAlkaş A
dc.contributor.authorThangavel K
dc.contributor.authorPöppl A
dc.contributor.authorTelfer SG
dc.coverage.spatialUnited States
dc.date.accessioned2024-01-12T02:17:28Z
dc.date.accessioned2024-07-25T06:47:13Z
dc.date.available2022-09-15
dc.date.available2024-01-12T02:17:28Z
dc.date.available2024-07-25T06:47:13Z
dc.date.issued2022-09-27
dc.description.abstractMetal-organic frameworks (MOFs) can respond to light in a number of interesting ways. Photochromism is observed when a structural change to the framework is induced by the absorption of light, which results in a color change. In this work, we show that introducing quinoxaline ligands to MUF-7 and MUF-77 (MUF = Massey University Framework) produces photochromic MOFs that change color from yellow to red upon the absorption of 405 nm light. This photochromism is observed only when the quinoxaline units are incorporated into the framework and not for the standalone ligands in the solid state. Electron paramagnetic resonance (EPR) spectroscopy shows that organic radicals form upon irradiation of the MOFs. The EPR signal intensities and longevity depend on the precise structural details of the ligand and framework. The photogenerated radicals are stable for long periods in the dark but can be switched back to the diamagnetic state by exposure to visible light. Single-crystal X-ray diffraction analysis reveals bond length changes upon irradiation that are consistent with electron transfer. The multicomponent nature of these frameworks allows the photochromism to emerge by allowing through-space electron transfer, precisely positioning the framework building blocks, and tolerating functional group modifications to the ligands.
dc.description.confidentialfalse
dc.format.pagination8437-8445
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/37288142
dc.identifier.citationCornelio J, Lee SJ, Zhou T-Y, Alkaş A, Thangavel K, Pöppl A, Telfer SG. (2022). Photoinduced Electron Transfer in Multicomponent Truxene-Quinoxaline Metal-Organic Frameworks.. Chem Mater. 34. 18. (pp. 8437-8445).
dc.identifier.doi10.1021/acs.chemmater.2c02220
dc.identifier.eissn1520-5002
dc.identifier.elements-typejournal-article
dc.identifier.issn0897-4756
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/70868
dc.languageeng
dc.publisherAmerican Chemical Society
dc.publisher.urihttps://pubs.acs.org/doi/10.1021/acs.chemmater.2c02220
dc.relation.isPartOfChem Mater
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titlePhotoinduced Electron Transfer in Multicomponent Truxene-Quinoxaline Metal-Organic Frameworks
dc.typeJournal article
pubs.elements-id457330
pubs.organisational-groupOther
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