Cu (I) complex luminescent material with high molar absorption coefficient

[0021] Synthesis of Ligand L

[0022] synthetic route:

[0023]

[0024] (1) Synthesis of 5-phenylethynylpyridine-2-carbaldehyde

[0025] Add 5-bromopyridine-2-carbaldehyde (1.86g, 10mmol), bis(triphenylphosphine)palladium dichloride (0.21g, 0.3mmol), cuprous iodide (0.11g, 0.6 mmol) were combined in anhydrous THF (25 mL), triethylamine (25 mL), phenylacetylene (1.02 g, 10 mmol) were added dropwise. The mixture was stirred at reflux for 8 hours. After the reaction, the solution was added with saturated ammonium chloride solution, extracted with dichloromethane, the organic layer was dried with anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The solid product 5-phenylethynylpyridine-2-carbaldehyde was obtained by silica gel chromatography.

[0026] (2) Synthesis of ligand 2-(1H-imidazol-2-yl)-5-phenylethynylpyridine L

[0027] Add the solid product 5-phenylethynylpyridine-2-carbaldehyde (1.28g, 6.2mmol), 10mL glyoxal, and 40mL absolute ethan

[0029] Complex [Cu(L)(POP)]PF 6 Synthesis:

[0030] synthetic route:

[0031]

[0032] Ligand L (0.86g, 3.5mmol) was dissolved in 5mL ethanol and 5mL dichloromethane, and POP (1.55g, 3.5mmol), [Cu(CH 3 EN) 4 ](PF 6 ) (1.30g, 3.5mmol), 5mL ethanol and 5mL dichloromethane, the above two solutions were stirred at room temperature for 1h, then mixed and stirred for 2h. The reaction solution was filtered with diatomaceous earth, the solvent was removed under reduced pressure, recrystallized with ethyl acetate, dried to obtain [Cu(L 1 )(POP)]PF 6 Product 1.36g, yield 46%. 1 HNMR(400MHz,DMSO)δ8.21–8.05(m,2H),7.97(s,1H),7.53(s,1H),7.44(d,J=3.3Hz,2H),7.41(s,3H), 7.36–7.15(m,18H),7.09(d,J=7.5Hz,3H),6.99(t,J=7.5Hz,3H),6.79(s,4H),6.59(d,J=3.8Hz,2H ).

[0033] Complex [Cu(L)(POP)]PF 6 The UV-Vis absorption spectrum is shown in figure 2 . Determination of the prepared complex [Cu(L)(POP)]PF 6 The light absorption capacity of the complex [Cu(L)(POP)]PF at room temperature 6 At