Bifunctional supramolecular systems on the platform of p-sulfonatothiacalix[4]arene containing photochromic mononitrosyl Ru (II) and paramagnetic aqua Gd or Dy complexes

Two bifunctional supramolecular systems [RuNO(NH 3 ) 4 OH] 2+ · [RuNO(NH 3 ) 4 H 2 O] 3+ Cd 3+ (H 2 O) 6 · 2[TCAS] 4- · 4H 2 O (1) and [RuNO(NH 3 )4OH] 2+ · [RuNO(NH 3 ) 4 H 2 O] 3+ · Dy 3+ (H 2 O) 6 · 2[TCAS] 4- · 4H 2 O (2) on the platform of p-sulfonatothiacalix[4]arene containing photochromic mononitrosyl Ru and paramagnetic rare-earth (Cd 3+ , Dy 3+ ) cations have been synthesized. The crystal structures of 1 and 2 are discussed. Their photochromic, magnetic and photomagnetic properties studied by IR and SQUID experimental techniques are presented.