A Copper(i) Alkyne Cluster with Aggregation-Induced Luminescence and Circularly Polarized Luminescence

Abstract

The invention discloses a copper (I) alkyne cluster with aggregation-induced luminescence and circularly polarized luminescence, which belongs to the cross field of coordination chemistry and nanometer materials. The enantiomer of the chiral nano-copper cluster uses the chiral ligand (R / S)-2-diphenyl-hydroxymethylpyrrolidine-1-propyne (R / S-DPM) as a protective ligand, through a simple It is synthesized by room temperature volatilization in one pot, with high yield and excellent luminescent properties. The chemical formula of this enantiomeric cluster is: C 160 h 160 P 6 Cu 14 f 36 o 8 (Abbreviated as: R / S‑DPM‑Cu 14 ), belongs to the orthorhombic crystal system, and the space group is the chiral space group P 2 1 2 1 2 1 . The copper nanocluster has red fluorescence at room temperature; its chiral structure and luminescent properties endow the cluster with strong circularly polarized luminescence (CPL) properties, which makes it very good in luminescent materials and chiral optical materials. Application prospects; the copper nanocluster has aggregation-induced emission (AIE) properties, and its fluorescence increases with the increase of poor solvent content, and realizes strong circularly polarized luminescence (CPL) properties, and its fluorescence asymmetry factor reaches 1.0× 10 ‑2 , its aggregation-induced luminescent properties, ultra-small size and low toxicity can be used for bright cell imaging.

Description

technical field

[0001] The invention belongs to the intersection field of coordination chemistry and nanometer materials, and specifically relates to a copper (I) alkyne cluster with aggregation-induced luminescence and circularly polarized luminescence. Background technique

[0002] The preparation and study of atomically precise metal nanoclusters has become a new and promising research direction in the field of nanoscience. Metal nanoclusters usually consist of tens to hundreds of metal atoms bridged by organic ligands, a class of clusters with precise atomic structures. As a bridge connecting atoms and nanoparticles, metal nanoclusters exhibit unique optical, electrical, and chemical properties. Compared with gold and silver, copper has many advantages such as cheap price, high abundance in the earth's crust, and wide range of sources. However, the synthesis of luminescent copper clusters is still a great challenge due to the difficult synthesis and easy oxidation of c...

Examples

Embodiment 1

[0023] Embodiment 1: the synthesis of nano-copper cluster material of the present invention

[0024] Dissolve 0.035 mmol of (R / S)-2-diphenyl-hydroxymethylpyrrolidine-1-propyne (R / S-DPM) and 0.035 mmol of tetraacetonitrile copper hexafluorophosphate in a mixture of 2 mL of toluene and 2 mL of acetone In the solution, stir the solution quickly to clarify. After the reaction, place the clear solution at room temperature to avoid light and volatilize. After 2 days, orange blocky crystals are obtained. The yield is 50%. Filter, wash with ethanol, and dry at room temperature for its property test Material.

[0025] Get the nano copper cluster material of the present invention that embodiment 1 makes and do further characterization, its process is as follows:

[0026] (1) Determination of crystal structure

[0027] The X-ray single crystal diffraction data of the complexes were measured on a Rigaku XtaLAB Pro single crystal diffractometer with a single crystal sample of appropriate...

technical field

[0001] The invention belongs to the intersection field of coordination chemistry and nanometer materials, and specifically relates to a copper (I) alkyne cluster with aggregation-induced luminescence and circularly polarized luminescence. Background technique

[0002] The preparation and study of atomically precise metal nanoclusters has become a new and promising research direction in the field of nanoscience. Metal nanoclusters usually consist of tens to hundreds of metal atoms bridged by organic ligands, a class of clusters with precise atomic structures. As a bridge connecting atoms and nanoparticles, metal nanoclusters exhibit unique optical, electrical, and chemical properties. Compared with gold and silver, copper has many advantages such as cheap price, high abundance in the earth's crust, and wide range of sources. However, the synthesis of luminescent copper clusters is still a great challenge due to the difficult synthesis and easy oxidation of c...

Examples

Embodiment 1

[0023] Embodiment 1: the synthesis of nano-copper cluster material of the present invention

[0024] Dissolve 0.035 mmol of (R / S)-2-diphenyl-hydroxymethylpyrrolidine-1-propyne (R / S-DPM) and 0.035 mmol of tetraacetonitrile copper hexafluorophosphate in a mixture of 2 mL of toluene and 2 mL of acetone In the solution, stir the solution quickly to clarify. After the reaction, place the clear solution at room temperature to avoid light and volatilize. After 2 days, orange blocky crystals are obtained. The yield is 50%. Filter, wash with ethanol, and dry at room temperature for its property test Material.

[0025] Get the nano copper cluster material of the present invention that embodiment 1 makes and do further characterization, its process is as follows:

[0026] (1) Determination of crystal structure

[0027] The X-ray single crystal diffraction data of the complexes were measured on a Rigaku XtaLAB Pro single crystal diffractometer with a single crystal sample of appropriate...

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