Synthesis and crystal structure of rare-earth biuret complexes with linear pentaiodide ions: Infinite polyiodide chains in a cationic framework

Embroidering Ionic Cocrystals with Polyiodide Threads: The Peculiar Outcome of the Mechanochemical Reaction between Alkali Iodides and Cyanuric Acid

“…3 As a rule of thumb, large cations favor the formation of extended polyiodide chains in the solid state, 3,4,12 and various supramolecular interactions such as hydrogen or halogen bonds, 11,13−15 caging, 16,17 and anion•••π 18,19 concur to stabilize the chains within the crystalline material. 2 Polyiodides, though extensively studied, constitute a class of materials still relatively poorly understood, and their intrinsic structural unpredictability has prompted further research in this direction, 20 in particular, to rationalize the formation of polyiodide infinite chains, which are, in turn, sought for their potential applications as electrolytes in solar cells, 21−24 electrochemical devices, 25−27 and optical devices, 26,28 among others.…”

“…Polyiodides, though extensively studied, constitute a class of materials still relatively poorly understood, and their intrinsic structural unpredictability has prompted further research in this direction, in particular, to rationalize the formation of polyiodide infinite chains, which are, in turn, sought for their potential applications as electrolytes in solar cells, − electrochemical devices, − and optical devices, , among others.…”

“…Linear polyiodide infinite chains are a rare subset of polyiodide infinite chains, and, to date, only a limited number of examples has been reported; ,,− for this reason, the focus of the current research in the field is the systematic investigation of synthetic methodologies able to produce and control such structural arrangements.…”

Pattern of covalent and non‐covalent interactions within the pentaiodide anion in the structure of (3‐HOC5H9NH2)I5

“…Moreover, weaker I•••I intermolecular interactions link anions into 2D or even 3D arrays of different topology and complexity. [16][17][18][19][20][21] In this work, we present a new compound, (3-HOC 5 H 9 NH 2 )I 5 , which crystal structure comprises 3-hydroxypiperidinium cations and pentaiodide anions condensed into cis-shaped chains. We use structural analysis, Raman spectroscopy, and DFT calculations to analyse the bonding pattern, which features a number of covalent and non-covalent interactions of different strength, both within the polyanion and between the cation and polyanion.…”

Pressure-Aided Stabilization of Pyramidal Polyiodides

“…PIs exhibit a great structural diversity in the crystalline state. − Their discrete chains range from the minimal I 3 – unit up to I 29 3– . Besides, a number of I 2 ···I n m – adducts are reported in the Cambridge Structural Database (CSD) v.5.40 (Figure S1) which can be regarded as intermediate products of the addition reaction to form higher PIs. ,, Recently, infinite PI chains stabilized with planar pyrroloperylene and phenantrolinium cations were reported. , …”