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Enhancing Porphyrin Photostability When Locked in Metal-Organic Frameworks

Abstract

Porphyrins have been widely used in many optical devices given their unique photochemical properties. Their poor photostability has, however, limited their wide applications in bioimaging and biosensing schemes. Herein, we report the remarkable photostability enhancement of porphyrins carboxyphenylporphyrin (TCPP-H2) when locked in a zirconium based metal-organic framework (MOF-525). Steady-state ensemble fluorescence spectroscopy experiments showed minimal changes (2%) in the recorded signal when MOF-525 was continuously illuminated as compared to a 16% decrease for the free porphyrins. Single particle fluorescence imaging revealed bright microparticles with exceptional photosability and no-blinking within the experiment window. This study highlights the use of metal-organic frameworks for preparing photostable microstructures by leveraging on their unique self-assembly properties.

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Publication details

The article was received on 09 Sep 2018, accepted on 08 Oct 2018 and first published on 09 Oct 2018


Article type: Paper
DOI: 10.1039/C8DT03638A
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Enhancing Porphyrin Photostability When Locked in Metal-Organic Frameworks

    G. Hassan, N. El Hoda Saad, M. Hmadeh and P. Karam, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT03638A

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