Details

Autor(en) / Beteiligte

• Jin, Jian-Ce
• Zhuang, Ting-Hui
• Lin, Yang-Peng
• Lin, Bing-Ye
• Jiang, Jiang
• Du, Ke-Zhao
• Huang, Xiao-Ying

Titel

Ionic indium() chloride hybrids incorporating a 2,2′-bipyrimidine ligand: studies on photoluminescence and structural transformation

Ist Teil von

• Dalton transactions : an international journal of inorganic chemistry, 2021-11, Vol.5 (44), p.1646-16413

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Although luminescent indium( iii ) based halide perovskites have been widely investigated, the study of emissive indium( iii ) halide hybrids is limited. Three indium( iii ) chloride hybrids based on a bpym ligand were synthesized, namely [EPy] 2 [InCl 4 (bpym)InCl 4 ]·DMF ( 1 ), [EPy] 2 [InCl 4 (bpym)InCl 4 ] ( 2 ), and [BPy] 2 [InCl 4 (bpym)InCl 4 ] ( 3 ) (EPy = N -ethylpyridinium; BPy = N -butylpyridinium; bpym = 2,2′-bipyrimidine). They all exhibit a zero-dimensional structure, in which the ligand bpym interconnects two [InCl 4 ] − to form a [InCl 4 (bpym)InCl 4 ] 2− anion that is further charge-compensated by the corresponding pyridinium cations. This is the first time using bpym to coordinate with an In atom. At 298 K, 1 exhibits a weak emission at 600 nm while 2 and 3 exhibit emissions peaking at 500 nm and 540 nm, respectively. Interestingly, the DMF solvent molecule in 1 can be removed by heating, thus resulting in the structural transformation of 1 into 2 together with a photoluminescence (PL) change. Density functional theory (DFT) calculations confirm that halogen-to-ligand charge-transfer (HLCT) occurs in the emission process. To the best of our knowledge, this is the first report on PL of ionic indium( iii ) halide hybrids incorporating organic ligands. The first three indium( iii ) chloride hybrids composed of a 2,2′-bipyrimidine-incorporating haloindium( iii ) anion and ionic liquid cations were synthesized and structurally studied, which show structural transformation and photoluminescence switching.