Sigma-Aldrich and used as received. Toluene-d8 (99+%) was purchased from Acros Organics and used as received.
A 1 mL suspension of 8 mg of the colloidal MoC1–x nanoparticles in CHCl3 was transferred
to a J. Young NMR tube and dried overnight under vacuum. The nanoparticles
were then redispersed in 0.8 mL of toluene-d8 in the J. Young tube by bath sonication for 5 min. Additionally,
5 μL of a 1 mM solution of ferrocene in toluene-d8 was added to the J. Young tube as an internal standard.
Titrations were performed with 10 μL aliquots of a 0.23 M solution
of UDAm in 250 μL of toluene-d8.