Abstract
The structures of two new hybrid organic–inorganic manganese halide compounds [1MiH]MnCl3(H2O) and [4MiH]MnCl3(H2O) ([1MiH] = 1-methylimidazolium, [4MiH] = 4-methylimidazolium) have been determined by single crystal X-ray diffraction. Both are composed of one dimensional [MnCl3(H2O)]n− edge-sharing octahedral chains. The structures are compared to the previously reported isomeric analogue [2MiH]MnCl3(H2O) ([2MiH] = 2-methylimidazolium), and three closely related compounds. The variations in packing of the inorganic chains are shown to be influenced by hydrogen bonding abilities of the imidazolium or related moieties. Both new compounds show intense red luminescence at ambient temperature under UV irradiation.
Highlights
The past decade has witnessed much progress in the exploratory study of hybrid inorganic–organic compounds, many of which are related to the perovskite family [1,2]
We prepared two new compounds composed of one dimensional [MnCl (H O)] −
We prepared two new compounds composed of one dimensional [MnCl3 3(H22O)]nn−
Summary
The past decade has witnessed much progress in the exploratory study of hybrid inorganic–organic compounds, many of which are related to the perovskite family [1,2]. Mn2+ hexagonal perovskite compounds, where the cations occupy the free cavities enclosed by the face-sharing octahedral chains These compounds exhibit interesting phase transitions, for example, (pyrrolidinium)MnCl3 [17] and (R)- and (S)-3-(fluoropyrrolidinium)MnCl3 [18], which have ferroelectric and fluorescence properties. ([2MiH]MnCl3 (H2 O)) [19,20] (2-aminopyridinium)MnCl3 (H2 O) [21], (pyrazolium)MnCl3 (H2 O) [22], and (pyridinium)MnCl3 (H2 O) [23] adopt a 1D chain structure type, but the octahedra are edge-sharing and, the structure cannot be regarded as perovskite-like According to these studies, the luminescence of manganese (II) halide hybrids can be assigned to the 4 T1g (G) →.
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