“…In 2007, Raj et al reported complexes of MB and mercury(II) ions . Further complexes are also known with praseodymium(III), samarium(III), copper(I), and silver(I), , as well as metal thiocyanates of cobalt(II), copper(II), and zinc(II) . Hubenko et al described an increase in the activity of nanoparticle systems upon complexation with MB .…”