A new series of five highly emissive binuclear heteroleptic pyridyltriazole-Cu(i)-phosphine complexes 1-5 was synthesized and examined by different experimental (IR, elemental and thermogravimetric analysis, single crystal X-ray diffraction technique, UV-vis and fluorescence spectroscopy) and quantum chemical aproaches. Complexes 1-5 exhibited excellent stimuli-responsive photoluminescent performance in the solid state at room temperature (quantum yield (QY) = 27.5-52.0%; lifetime ( τ) = 8.3-10.7 μs) and when the temperature was lowered to 77 K (QY = 38.3-88.2; τ = 17.8-134.7 μs). The highest QY was examined for complex 3 (52%) that can be explained by the small structural changes between the ground S 0 and exited S 1 and T 1 states leading to the small S 1-T 1 triplet gap and efficient thermally-activated delayed fluorescence. Moreover, complex 4 demonstrates reversible mechanochromic and excitation dependent luminescence.
Translated title of the contribution | Строение и эмиссионные свойства биядерных комплексов меди(I) с пиридилтриазолом |
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Original language | English |
Pages (from-to) | 3899-3909 |
Number of pages | 11 |
Journal | RSC Advances |
Volume | 13 |
Issue number | 6 |
Early online date | 23 Jan 2023 |
DOIs | |
State | Published - 24 Jan 2023 |
ID: 106953635