Quenching of the phosphorescence of thermally reversible photochromic naphthopyran Re(i) complexes initiated by either visible or ultraviolet radiation†
Paul I. P.
Elliott, 
*a
B. Mark
Heron,
*a
Denis
Jacquemin,
*b
Craig R.
Rice
a
and
Paul A.
Scattergood
a
*a
B. Mark
Heron,
*a
Denis
Jacquemin,
*b
Craig R.
Rice
a
and
Paul A.
Scattergood
a
Abstract
Re(I) complexes bearing thermally reversible photochromic naphthopyran axial ligands undergo highly efficient, reversible phosphorescence quenching actuated by either visible or UV irradiation. The photoinduced quenching of the triplet metal-to-ligand charge-transfer (3MLCT) emission is interpreted based on changes in the relative energies of the excited states.
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