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Issue 28, 2018
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Guest to framework photoinduced electron transfer in a cobalt substituted RWLC-2 metal organic framework

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Abstract

Photoinduced electron transfer (PET) between donors and acceptors in porous materials is a key element in the development of light harvesting applications. Metal organic frameworks (MOFs) are ideal materials for PET processes due to their tunable pore size and diversity in framework building units. Here, PET between excited [Ru(2,2′-bipyridine)3]2+ (RuBpy) and Co-carboxylate clusters composing the metal building blocks of a RWLC-2 metal organic framework is described. The lifetime of the RuBpy decreases from ∼600 ns in deaerated solution to 9.5 ns (kET ∼ 1 × 108 s−1) when encapsulated within CoRWLC-2. The decrease in lifetime is attributed to PET between the 3MLCT of RuBpy to the Co ion cluster composing the MOF building blocks. A fit of the lifetime vs. temperature data to the semi-empirical Marcus equation gives a reorganizational energy of 1.6 eV and an electronic coupling factor (HAB) of 0.006 eV.

Graphical abstract: Guest to framework photoinduced electron transfer in a cobalt substituted RWLC-2 metal organic framework

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Publication details

The article was received on 02 Apr 2018, accepted on 24 May 2018 and first published on 29 May 2018


Article type: Paper
DOI: 10.1039/C8DT01287C
Citation: Dalton Trans., 2018,47, 9250-9256
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    Guest to framework photoinduced electron transfer in a cobalt substituted RWLC-2 metal organic framework

    C. R. McKeithan, L. Wojtas and R. W. Larsen, Dalton Trans., 2018, 47, 9250
    DOI: 10.1039/C8DT01287C

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