Noun
Lewis base (plural Lewis bases)
(chemistry) Any nucleophylic compound that can donate a pair of electrons and form a coordinate covalent bond.
For instance, carbon monoxide acts as a Lewis base when it forms an adduct with boron trifluoride, of formula F 3 B←CO Adducts involving metal ions are referred to as co-ordination compounds; each ligand donates a pair of electrons to the metal ion. Source: Internet
Thus :BF 3 + F − → BF 4 − is a typical Lewis acid, Lewis base reaction. Source: Internet
The injected charges acting as a Lewis base can be trapped by lead defects in the surface layer and further passivate the deep-level donor-like defects inside perovskites. Source: Internet
When a pyridine ligand is part of a metal complex, it can be easily replaced by a stronger Lewis base. Source: Internet