Bis{4-[4-(dimethylamino)styryl]-1-ethylpyridinium} di-μ-iodido-bis[iodidocuprate(II)]

Abstract

The title compound, (C17H21N2)2[Cu2I4], consists of an organic cation, 4‐[4‐(dimethylamino)stryl]‐1‐ethylpyrdinium, and an inorganic anion, [Cu2I4]2−. The Cu(I) atom exhibits a trigonal coordination. The anions form discrete centrosymmetric dimers about inversion centers and are surrounded by the cations.

Quaternary Phosphorus‐Induced Iodocuprate(I)‐Based Hybrids: Water Stabilities, Tunable Luminescence and Photocurrent Responses

“…Structure of (PPh 3 i Pr) 2 (Cu 2 I 4 ) (3): 3 has been previously structurally determined, whose planar (Cu 2 I 4 ) 2– dimer is constructed from two edge‐sharing CuI 3 triangles . The Cu–I lengths and I–Cu–I angles are consistent with those found in other iodocuprates, and the Cu ··· Cu distance of 2.9380(11) Å is somewhat longer than reported iodocuprates . Specially, there are three kinds of C–H ··· π interactions between adjacent PPh 3 i Pr + cations (Table S4).…”

Polymorphic Copper Iodide Anions: Luminescence Thermochromism and Mechanochromism of (PPh4)2[Cu2I4]

“…Selected bond lengths and angles in the [Cu 2 I 4 ] 2– anions at 293 K are given in Table . The Cu–I bond distances and I–Cu–I angles are within the range of reported values for such copper iodide compounds. − The Cu–I­(μ 1 ) bond distances are shorter than the Cu–I­(μ 2 ) distances .in agreement with the stronger ionic interaction. The intramolecular Cu–Cu bond distance in A (Cu 1 –Cu 1 = 2.955(1) Å) is much longer in comparison with that in B (Cu 1 –Cu 2 = 2.662(1) Å at 293 K).…”

“…33 Another binuclear anion is [Cu2I4] 2which has been encountered in several associations with different organic and inorganic cations. 34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66 The photophysical properties of these compounds have been rarely characterized, [Cu2I4] 2being simply treated as an inorganic counter-anion and not as an emissive species by itself. In particular, with the tetraphenylphosphonium cation, the polymorphic structure of (PPh4)2[Cu2I4] has been reported but no photophysical characterization has been investigated.…”

“…Note that zwitterionic compounds which covalently bind the anion and cation have been recently reported . Another binuclear anion is [Cu 2 I 4 ] 2– , which has been encountered in several associations with different organic and inorganic cations. − The photophysical properties of these compounds have been rarely characterized, [Cu 2 I 4 ] 2– being simply treated as an inorganic counteranion and not as an emissive species by itself. In particular, with the tetraphenylphosphonium cation, the polymorphic structure of (PPh 4 ) 2 [Cu 2 I 4 ] has been reported but no photophysical characterization has been investigated. , The occurrence of crystalline polymorphism provides a great tool to explore structure–properties relationships of molecular solids and to get insights into their physical properties .…”