Luminescent metal complexes are an exceptional tool in the field of cellular imaging due in part to their long lifetimes, high luminescence efficiency, large Stokes shifts, and a tunable excitation and emission wavelength. Compounds containing a rhenium tricarbonyl core {Re(I)(CO)&lt;sub abp="570"&gt;3}&lt;sup abp="571"&gt;+ are of particular interest due to their high stability and photophysical properties. Using N&lt;sup abp="572"&gt;1,N&lt;sup abp="573"&gt;1-bis(thiazol-4-ylmethyl)butane-1,4-diamine as a tridentate ligand, a {Re(I)(CO)&lt;sub abp="574"&gt;3}&lt;sup abp="575"&gt;+core complex (&lt;b abp="576"&gt;1) was noted to exhibit the highly unusual behavior of emission wavelength varying with excitation wavelength. This phenomena has been attributed to photoisomerization from the N,N ground state to the N,S and S,S excited state. Work herein focuses on the synthesis, purification, characterization and photophysical properties of ground state isomeric analogues of &lt;b abp="577"&gt;1 to determine the effects of the coordination of N,S and S,S in the ground state on emission behavior. Complementary DFT calculations on target complexes have shown that isomeric coordination to the {Re(I)(CO)&lt;sub abp="578"&gt;3}&lt;sup abp="579"&gt;+ core impacts geometry, electronic structure, and shows favorable N,N coordination as opposed to N,S and S,S. Exploitation of this photo-isomerized series of complexes can lead to the production of photo devices.

Investigation of isomeric single amino acid chelate (SAAc) rhenium series

249th National Meeting (2015)

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