Issue 47, 2014

Sn(iv) Schiff base complexes: triplet photosensitizers for photoredox reactions

Abstract

We present the synthesis and characterization of a series of four fluorescent Sn(IV) Schiff base complexes, which also possess long-lived triplet excited states. The complexes absorb visible light (λmax = 420 to 462 nm) and the optical properties are easily tunable without laborious synthetic elaboration. The triplet excited states are not luminescent, but can be observed and followed using nanosecond transient absorption spectroscopy. The lifetimes of the triplet excited states are on the order of 500 μs–10 ms in PMMA matrices. The triplet state energies were estimated via energy transfer reactions with a series of organic triplet acceptors. In addition, the photoexcited complexes react with electron donors and acceptors in solution. These results demonstrate the potential for the development of photosensitizers based on main group elements with high spin orbit coupling constants.

Graphical abstract: Sn(iv) Schiff base complexes: triplet photosensitizers for photoredox reactions

Supplementary files

Article information

Article type
Paper
Submitted
14 May 2014
Accepted
09 Jul 2014
First published
21 Jul 2014

Dalton Trans., 2014,43, 17754-17765

Author version available

Sn(IV) Schiff base complexes: triplet photosensitizers for photoredox reactions

T. A. Grusenmeyer, A. W. King, J. T. Mague, J. J. Rack and R. H. Schmehl, Dalton Trans., 2014, 43, 17754 DOI: 10.1039/C4DT01427H

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