Terahertz time-domain absorption spectra of Cu(i) complexes bearing tetraphosphine ligands: the bridge between the C–H⋯π and π⋯π interactions and photoluminescence properties

Abstract

The synthesis of four heteroleptic dinuclear Cu(I) complexes bearing tetraphosphine and diimine ligands was reported. Complexes 1-3 were successfully obtained through microwave synthesis while complex 4 was synthesized through traditionally...

AIE macrocyclic molecule-based assembled materials with opposite solvent-responsive properties

“…S6-S9 (ESI †), weak interactions of C-HÁ Á Áp are found in the solvents containing assembled materials, which provide the potential nonradiative transition channel for the excited state electron, agreeing well with the proposed mechanism. 39…”

Study on the luminescence properties of ionic [Cu(N^N)(P^P)]+ complexes: influence of ligands, counteranions and weak interactions

“…There is an obvious absorption peak at 1.2–1.6 THz in the THz absorption spectra of the phen series complexes 1a–4a , consistent with the previous studies, which is related to the C–H⋯π interactions in the complexes. 49,56–58 The Dpq series complexes 3b and 4b with C–H⋯π interactions show obvious absorption peaks near 1.2–1.6 THz. Due to the absence of π–π and C–H⋯π interactions in complexes 1b and 2b , there is almost no absorption in the corresponding low frequency range of the THz spectra and the absorption peak begins to appear after 2.0 THz.…”

Synthesis and luminescent properties of three excellent yellow emissive Cu(i) complexes based on the diphosphine ligand and the diimine ligand

“…We attribute this phenomenon to the weak interactions in the complexes pulling the ligands closer together, leading to distortion and promoting planarization of the ligands, resulting in a low PLQY. 40 Conversely, complex 2 , despite lacking weak interactions, benefits from the rigidity of its ligands and binuclear structure, which effectively mitigates steric hindrance and leads to a high PLQY. Previous studies on similar copper( i ) complexes with high quantum yields for yellow emission have supported this mechanism.…”