Thiacalix[4]arene-Protected Titanium-Oxo Clusters: Influence of Ligand Conformation and Ti-S Coordination on the Visible-Light Photocatalytic Hydrogen Production.

p-tert-Butylthiacalix[4]arene (H4TC4A)-decorated tetranuclear (Ti4) and hexanuclear (Ti6) polyoxo–titanium clusters (PTCs) were synthesized in isopropyl alcohol by a low-temperature solvothermal me...