Zinc and cadmium iodide complexes with (thio)amides: Transformations of formamide complexes and effects of substitution on structure and bonding

One Luminescent Cadmium Iodide with Free Bifunctional Azole Sites as a Triple Sensor for Cu2+, Fe3+, and Cr2O72– Ions

“…More intriguingly, 1 shows some special structural features. First, the organic species utilized as SDAs or/and ligands for the preparation of OHCIs are mainly dominated by pyridyl, triazolyl, and imidazolyl derivatives, − but no bifunctional organic species with pyrazinyl and triazolyl groups are applied for the syntheses of OHCIs. Hence, 1 is the only example of OHCIs incorporating bpt – with bifunctional pyrazinyl and triazolyl groups as SDAs and ligands.…”

“…The type of the organic components has a significantly structural directing effect on the frameworks of cadmium iodide components. Generally, protonated organic cations as either ligands or structure-directing agents (SDAs) are particularly preferable for a multiplicity of the anionic species [Cd x I y ] x − y (2 x < y ), as exemplified by simple tetrahedron [CdI 4 ] 2– , − ,, dimers [Cd 2 I 6 ] 2– or [Cd 2 I 7 ] 3– , trimers [Cd 3 I 7 ] − or [Cd 3 I 8 ] 2– , tetramer [Cd 4 I 10 ] 2– , hexamer [Cd 6 I 16 ] 4– , and one-dimensional (1-D) chains ∞ [Cd 2 I 6 ] − ,, or ∞ [Cd 5 I 12 ] 2– , while neutral organic molecules result in the formation of various neutral species [Cd x I 2 x ], such as dimer [Cd 2 I 4 ], hexamer [Cd 6 I 12 ], and 1-D chains ∞ [CdI 2 ], ∞ [Cd 3 I 6 ], and ∞ [Cd 4 I 8 ] . Conversely, OHCIs incorporating the cationic species [Cd x I y ] x − y (2 x > y ) are exceedingly scarce, ,, as a result of synthetic difficulties.…”