title: Blue rhenium tricarbonyl DPPZ complexes - low energy charge-transfer absorption at tissue-penetrating wavelengths.
abstract: fac-[Re(CO)3(dppz)] complexes of amido ligands generated in situ under basic conditions display an intense (ε = 16460 L mol-1cm-1) absorption band between 500-700 nm which are assigned to an n(amido,RNH-) → π* (dppz) inter-ligand charge transfer band offering an extraordinarily low energy charge separating absorption with potential for imaging and energy application.
authors.affiliation: Chemistry Department, Lancaster University, Faraday Building, Bailrigg, Lancaster, LA1 4YB, UK. m.coogan@lancs.ac.uk.
authors.forename: M P
authors.identifier: http://orcid.org/0000-0003-2568-9337
authors.initials: MP
authors.lastname: Coogan
authors.affiliation: Cardiff School of Chemistry, Cardiff University, Park Place, Cardiff, CF10 3AT, UK.
authors.forename: J A
authors.initials: JA
authors.lastname: Platts