Direct emission from quartet excited states triggered by upconversion phenomena in solid-phase synthesized fluorescent lead-free organic–inorganic hybrid compounds

Abstract

We report, for the first time, the solid-phase gram-scale synthesis of two lead-free, zero-dimensional (0D) fluorescent organic–inorganic hybrid compounds, [Bu4N]2[MnBr4] (1) and [Ph4P]2[MnBr4] (2).

Mechanochemical Synthesis of Zero Dimensional Organic‐Inorganic Metal Halide Hybrids

“…Individual MnCl 4 2− tetrahedrons are separated from each other by the large Ph 4 P + cations (Figure S1). The crystal structure of (Ph 4 P) 2 MnCl 4 is similar to that of previously reported isostructural (Ph 4 P) 2 MnBr 4 [9] . Mechanochemical synthesis was performed by adding Ph 4 PCl and metal halides with appropriate ratios into stainless‐steel jars.…”

“…The crystal structure of (Ph 4 P) 2 MnCl 4 is similar to that of previously reported isostructural (Ph 4 P) 2 MnBr 4 . [9] Mechanochemical synthesis was performed by adding Ph 4 PCl and metal halides with appropriate ratios into stainless-steel jars. Diethyl ether was added as grinding medium (milling agent) to facilitate the mixing of the precursor reactants.…”

Mn2+‐Doped Metal Halide Perovskites: Structure, Photoluminescence, and Application

“…Mn 2+ ‐based 0D metal halides act as a kind of special system due to their unique optical properties, such as the narrow full width at half maximum (fwhm), high thermal stability, and abnormal PLQY. [ 191–205 ] As discussed above, the Mn 2+ PL characteristics are closely related to the crystal field environment; as a result, Mn 2+ ‐based metal halides generally show the green emission with tetrahedrally coordinated Mn 2+ ions as well as the red emission with octahedral coordinated Mn 2+ ions. Recently, some Mn 2+ ‐based metal halides are reported to show excellent luminescent and ferroelectric performances.…”

Symmetry breaking of A3M2X9-type perovskite derivatives induced by polar quaternary ammonium cations: achieving efficient nonlinear optical properties

“…The strong vibrational bands at 2991 and 2938 cm −1 can be assigned to the C-H stretching vibrations of the CH 2 CH 3 groups, and that at 3057 cm −1 is from the C-H stretching vibrations of the benzyl ring. [50][51][52] In addition, the bands at 1470, 1384 and 1153 cm −1 originate from the C-H bending vibrations. The band at 1007 cm −1 stems from the C-N stretching vibration (Table S5 †).…”