Organic–inorganic hybrid materials assembled through weak intermolecular interactions. Synthesis, structures and non-linear optical properties of [4,4′-bipyH2][M(NCS)4] (M = Mn2+, Co2+ or Zn2+; 4,4′-bipy = 4,4′-bipyridine)
Abstract
Three compounds [4,4′-bipyH2][M(NCS)4] (M = Mn2+, Co2+ or Zn2+; 4,4′-bipy = ⋯
S contacts (ca. 3.63 Å) and are hydrogen bonded with the diprotonated [4,4′-bipyH2]2+
⋯
S 3.241 Å in 1; 3.235 Å in 2; 3.239 Å in 3] to form two-dimensional, highly wavy networks with hourglass-shaped cavities (ca. 12.3 Å long; 9.4 Å wide at the ends, 6.8 Å at the waist). These two-dimensional networks are stacked with each other to furnish a channel accommodating the diprotonated [4,4′-bipyH2]2+