“…SQs are a family of structures, which could be divided into random resins or defined architectures, i.e., ladder, open- and closed-cage silsesquioxanes and double-decker silsesquioxanes (DDSQ). − The multiplicity of structures and the presence of various reactive groups, e.g., Si–OH, Si–H, Si–HCCH 2 , enable their modification by stoichiometric (condensation, nucleophilic substitution) and catalytic reactions (hydrosilylation, metathesis, Heck or Sonogashira coupling, O -silylation) . As a result, diverse silsesquioxane-based functionalized systems are obtained that may exhibit interesting physicochemical properties that affect their possible application, resulting in the use of, i.e., materials chemistry, OLEDs, catalysis, or medicine. − Within the great variety of functional groups, the SQs possessing hydroxyl-terminated aliphatic substituents may be of special concern. − There are numerous scientific reports on the use of diol derivatives of SQs as comonomers of polyesters or polyurethanes − and also in the chemistry of biomedical materials . In addition, they have been reported in materials to remove dyes from wastewater or Ag(I) ions from aqueous solutions. , …”