Exploration of new chiral hybrid semiconducting palladium halide complexes: [(R)/(S)-2-Methylpiperazinediium]PdCl4

Bromination of organic spacer impacts on the structural arrangement, phase transitions, and optical and electrical properties of a hybrid halide compound:[(CH3)3N(CH2)3Br]2PdBr4

“…This structure motif bears resemblances to well-studied A 2 MX 4 organically templated metal halides, 31,34–36 where “A” represents protonated organo-halogen molecules, “M” denotes a metal (Fe, Cu, Cd, and Co) and “X” is a halogen atom (Cl, Br or I). The shortest Pd⋯Pd distances in [Br(CH 2 ) 3 N(CH 3 ) 3 ] 2 PdBr 4 are equal to 8.532 Å which is longer than those found in [( R )/( S )-2-methylpiperazinediium]PdCl 4 48 (6.937 Å) and [2,4,6-trimethyl- m -phenyl-enediaminediium]PdBr 4 50 (5.692 Å). These can be explained by the difference in sizes and shapes of the incorporated organic cations, highlighting structural diversity and adjustability.…”

“…These values are consistent with those observed in related Pd( ii ) complexes. 47,48 The coordination geometry near the Pd( ii ) center can be determined by calculating the parameter τ 4 [ τ 4 = 360° − ( α + β )/141°], where α and β are the two largest angles in the four-coordinate metal ion species, from 360°, then dividing by 141°. 49 For a perfect square-planar geometry, τ = 0, whereas for an ideal tetrahedral geometry, τ = 1 in the title compound.…”

The First Chiral Cerium Halide towards Circularly-polarized Luminescence in the UV Region

“…The CPL properties and performances in chiral OIHMHs are determined by the constituent units of the chiral organic cations and inorganic components [27,28]. Although researchers have systematically investigated the crystal structures and CPL of Pb- [29], Sn- [30], In- [31], Sb- [32], Bi- [33,34], Cu- [35], Ge- [8], Mn- [36], Zn- [37], Cd- [38], Fe- [31], Rb- [39], Pd- [40], and Ru- [5] based chiral OIHMHs, most of them exihibit visible-region CPL. Compared with the reported chiral OIHMHs, rare-earth (RE) elements have a rich variety of ion types and more diverse optical properties [41,42].…”