Dual Light and Redox Control of NIR Luminescence with Complementary Photochromic and Organometallic Antennae

With the help of a judicious association between dithienylethene
(DTE) units, an ytterbium ion, and a ruthenium carbon-rich complex,
we describe (i) the efficient (on/off) switching of pure NIR luminescence
with a photochromic unit absorbing in the UV range and (ii) the association
of electrochemical and photochemical control of this NIR emission
in a single system with nondestructive readout.