Disorder in 2-bromoimidazolium hexafluorophosphate salts: the role of halogen bonds

Wolfenden, Adrian V.; Taylor, Chloe M.; Ho, Curtis C.; Clegg, Jack K.; Kilah, N. L.

doi:10.1039/d2ce01643e

Cited by 1 publication

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References 72 publications

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“…For other novel complexes, 1 c, 2 a-2 c, and 3, single-crystal X-ray diffraction (SC-XRD) measurements were attempted, but the structure resolving process was significantly obstructed by the structural disorder, typical of the halogen-containing solids. [47][48][49] Eventually, molecular structures with reasonable R 1factors were obtained only for complexes 1 c, 2 c and 3 (Table S1). For them, experimental powder diffractograms were compared to the simulated patterns, obtained from SC-XRD structures (Figure S2).…”

Section: Synthesis and Structure Controlmentioning

confidence: 99%

Photophysical Tuning of Imidazolium Tetrahalidomanganate(II) Complexes towards Highly Efficient Green Emitters with Near‐Unity Quantum Yield

Sääsk,

Chen,

Huang

et al. 2023

Eur J Inorg Chem

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Ten ionic manganese(II) complexes of [EMIm]2[MnX2Y2] (EMIm = 1‑ethyl‐3‐methylimidazolium ion; X, Y = Cl, Br or I) and [BnMIm]2[MnX2Y2] (BnMIm = 1‐benzyl‐3‐methylimidazolium ion; X, Y = Cl, Br or I) types were synthesized and studied in terms of their thermal and photophysical properties. Complexes with [BnMIm]+ cation were found to exhibit higher crystallinity, owing to the aromatic π‐stacking, and superior photoluminescent quantum yields, promoted by the increased Mn⋯Mn distance. For complexes with chlorine and bromine ligands efficient tunability of photophysical parameters was demonstrated. Out of all complexes, [BnMIm]2[MnBr4] was found to have the highest photoluminescence quantum yield at room temperature (Φ = 0.59). To highlight the importance of a large Mn⋯Mn distance for achieving high Φ values, a mixed‐anion analog of complex [BnMIm]2[MnBr4] was prepared, with the suggested formula of [BnMIm]4[MnBr4]Br2. The latter have shown a significant improvement in d–d absorption efficiency and a reduction in nonradiative deactivation, which led to an outstanding Φ value of 0.97. Finally, the optical band gap of [BnMIm]4[MnBr4]Br2 was estimated to describe its applicability as light‐emitting material.

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Section: Synthesis and Structure Controlmentioning

confidence: 99%

Photophysical Tuning of Imidazolium Tetrahalidomanganate(II) Complexes towards Highly Efficient Green Emitters with Near‐Unity Quantum Yield

Sääsk,

Chen,

Huang

et al. 2023

Eur J Inorg Chem

View full text Add to dashboard Cite

show abstract

Disorder in 2-bromoimidazolium hexafluorophosphate salts: the role of halogen bonds

Abstract: X-ray crystallographic analysis of mono- and di- 2-bromoimidazolium cations as salts with bromide, hexafluorophosphate, or as double salts of the two, have indicated a tendency for disorder around the imidazolium...

Cited by 1 publication

References 72 publications

Photophysical Tuning of Imidazolium Tetrahalidomanganate(II) Complexes towards Highly Efficient Green Emitters with Near‐Unity Quantum Yield

Photophysical Tuning of Imidazolium Tetrahalidomanganate(II) Complexes towards Highly Efficient Green Emitters with Near‐Unity Quantum Yield

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