Synthesis, characterization and discussion of two copper(I) complexes with different luminescent properties under the influence of multiple weak forces

Abstract

Two new complexes, [Cu(dmp)(2-bdppmapy)](CF₃SO₃)·CH₂Cl₂ (1) and [Cu(imidazo[4,5-f])(2-bdppmapy)](SCN) (2) (2-bdppmapy = N,N-bis[(diphenylphosphino)methyl]-2-pyridinamine, dmp = 2,9-dimethyl-(1,10)phenanthroline and imidazo[4,5-f] = 1H-imidazo[4,5f][1,10]phenanthroline), have been synthesized in mixed solvents of CH₃OH and CH₂Cl₂ (1:1, V/V). On the basis of studying the structure and photophysical properties of the Cu(I) complexes, the effects of different N ligands and counter anions on the luminescence properties of the Cu(I) complexes were characterized by single-crystal X-ray diffraction, fluorescence spectra and terahertz time-domain spectroscopy (THz-TDS). The research shows that 1 exhibits excellent photoluminescence quantum yields. It is ascribed to the unique stacked structure. In addition, the relationship between the multiple weak forces, structure, and photophysical properties of the complexes was investigated.

Keywords:

• Copper(I) complex
• Luminescent properties
• Crystal structure
• Weak force
• Terahertz spectrum

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work has been supported by the National Natural Science Foundation of China (Grant Nos. 21171119, 62075248, 81573822, and 21376008), the Beijing Natural Science Foundation (Grant Nos. 2172017 and 2172012), the Beijing Municipal Education Commission (KM201510028006) and the Scientific Research Base Development Program of the Beijing Municipal, the R&D Program of Beijing Municipal Education Commission (KM202210028015), the Fundamental Research Funds for the Central Universities (Grant No. 2-9-2021-008).