Synthesis, characterization and luminescence properties of LnIII (Ln=Eu, Tb, Ce, Sm, Dy) complexes containing a terpyridine ligand and a 3d–4f type conjugated terpyridine-alkyne bridging EuIII–Co0 carbonyl cluster complex

4′-(3,5-Dimethoxy-4-propargyloxyphenyl)-2,2′:6′,2″-terpyridine

“…Aldehyde 2 (3,5-dimethoxy-4-propargyloxybenzaldehyde) was prepared by a method adapted from the literature [29] (Supplementary Materials). 1 H and 13 C NMR spectra were recorded on a Brucker AC 400 (Bruker, Wissembourg, France) spectrometer at 400 and 100 MHz, respectively, using CDCl 3 as a solvent. The infrared spectrum was recorded on a Vertex 70 spectrometer (Bruker, Wissembourg, France) in ATR mode.…”

“…The reaction mixture was stirred at room temperature for 24 h. The precipitated solid was collected by filtration, washed with icecold 50% ethanol until the filtrate was colorless, then dried under vacuum over phosphorus pentoxide to afford 1 as a faint yellow solid (5.10 g, 52%); mp = 224 • C. 1 H-NMR (CDCl 3 , 400 MHz), δ (ppm): 8.74 (d, 2H H6, 6 , J = 4.2 Hz ), 8.67 (m, 4H, H3, 3 , 3 , 5 ), 7.89 (td, 2H, H4, 4 , J = 7.7 Hz, J = 1.6 Hz), 7.37 (ddd, 2H, H5, 5 , J = 7.5 Hz, J = 4.9 Hz, J = 1.0 Hz), 7.06 (s, 2H, Hb), 4.81 (d, 2H, Hf, J = 2.4 Hz), 3.99 (s, 6H, Hd), 2.46 (t, 1H, Hh, J = 2.4 Hz). 13…”

“…The product was first characterized by 1 H and 13 C NMR spectroscopy (Supplementary Materials). The proton spectrum exhibits characteristic signals for a terpyridine compound.…”

“…The following are available online. Synthetic protocol for the preparation of aldehyde 2; 1 H, 13 C and ATR-IR spectra; HR-MS full report.…”

“…Furthermore, the ethynyl fragment can be used to attach terpyridine scaffolds onto various molecules, such amino acids [10], nucleosides [11] or aromatics [12]. Finally, the ability of both the terpyridine fragment and the alkyne moiety to complex metals allows the preparation of polymetallic complexes with interesting properties [13][14][15][16][17]. Because of all the above-mentioned points, the preparation of new terpyridine derivatives containing an alkyne function is still of interest.…”