Switching On/Off of a Solvent Coordination in a Au(I)-Pb(II) Complex: High Pressure and Temperature as External Stimuli

Thebenzonitrile solvate {[{Au(C6F5)(2)}(2){Pb(terpy)}]& BULL;NCPh} (n) (1) (terpy = 2,2 & PRIME;:6 & PRIME;,2 & DPRIME;-terpyridine)displays reversible reorientation and coordination of the benzonitrilemolecule to lead upon external stimuli. High-pressure X-ray diffractionstudies between 0 and 2.1 GPa reveal a 100% of conversion withoutloss of symmetry, which is totally reversible upon decompression.By variable-temperature X-ray diffraction studies between 100 and285 K, a partial coordination is achieved. The application of external stimuli suchas increasing pressureor lowering temperature causes an increase in the coordination numberof lead centers in a heterometallic Au(I)& BULL;& BULL;& BULL;Pb(II)complex, this process being completely reversible. The coordination/de-coordinationchange largely affects the NIR-emissive properties.

Automated summary

Thebenzonitrile solvate complex exhibits reversible reorientation and coordination of the benzonitrile molecule to lead upon external stimuli. High-pressure X-ray diffraction studies show 100% conversion without loss of symmetry, which is reversible upon decompression. Variable-temperature X-ray diffraction studies achieve partial coordination. The change in coordination greatly affects the NIR-emissive properties.