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ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES · 2023 ·Vol. 238 ·期 4 ·799-800 · IF 0.3

Crystal structure of N-(diaminomethylene)-1-(dimethylamino)-1-iminiomethanaminium dichloride, C4H13Cl2N5

Yu-Pei Xia

C 4 H 13 Cl 2 N 5 , monoclinic, P 2 1 (no. 4), a = 7.1868(6) Å, b = 5.8408(4) Å, c = 12.6534(11) Å, β = 105.134 ( 2 ) ∘ , V = 512.73(7) Å 3 , Z = 2, R gt ( F ) = 0.0354, wR ref ( F 2 ) = 0.0961, T = 298 K.

CAS / MDL: 1115-70-4

研究领域: 化学晶体学 · 材料科学

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Small · 2023 ·Vol. 19 ·期 25 ·2300938 · IF 13.3

One-Dimensional Chiral Copper Iodide Chain-Like Structure Cu4I4(R/S-3-quinuclidinol)3 with Near-Unity Photoluminescence Quantum Yield and Efficient Circularly Polarized Luminescence

Jian Chen,Xin Pan,Xuanyu Zhang,Chen Sun,Congcong Chen,Xiaoqin Ji,Rui Chen,Lingling Mao

Chiral organic−inorganic hybrid metal halide materials have shown great potential for circularly polarized luminescence (CPL) related applications for their tunable structures and efficient emissions. Here, this work combines the highly emissive Cu 4 I 4 cubane cluster with chiral organic ligand R / S -3-quinuclidinol, to construct a new type of 1D Cu-I chains, namely Cu 4 I 4 ( R / S -3-quinuclidinol) 3 , crystallizing in noncentrosymmetric monoclinic P 2 1 space group. These enantiomorphic hybrids exhibit long-term stability and show bright yellow emission with a photoluminescence quantum yield (PLQY) close to 100%. Due to the successful chirality transfer from the chiral ligands to the inorganic backbone, the enantiomers show intriguing chiroptical properties, such as circular dichroism (CD) and CPL. The CPL dissymmetry factor ( g lum ) is measured to be ≈4 × 10 −3 . Time-resolved photoluminescence (PL) measurements show long averaged decay lifetime up to 10 µs. The structural details within the Cu 4 I 4 reveal the chiral nature of these basic building units, which are significantly different than in the achiral case. This discovery provides new structural insights for the design of high performance CPL materials and their applications in light emitting devices.

研究领域: 材料科学 · 光电 · 光子学 · 无机化学 · 有机-无机杂化材料

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Crystal structure of N-(diaminomethylene)-1-(dimethylamino)-1-iminiomethanaminium dichloride, C4H13Cl2N5

One-Dimensional Chiral Copper Iodide Chain-Like Structure Cu4I4(R/S-3-quinuclidinol)3 with Near-Unity Photoluminescence Quantum Yield and Efficient Circularly Polarized Luminescence