Details

Autor(en) / Beteiligte

• Sinitsa, Dmitry K
• Pylova, Ekaterina K
• Mironova, Olga A
• Bashirov, Denis A
• Ryadun, Alexey A
• Sukhikh, Taisiya S
• Konchenko, Sergey N

Titel

Lanthanide complexes with a new luminescent iminophosphonamide ligand bearing phenylbenzothiazole substituents

Ist Teil von

• Dalton transactions : an international journal of inorganic chemistry, 2024-01, Vol.53 (5), p.2181-2192

Ort / Verlag

England: Royal Society of Chemistry

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A new iminophosphonamine Ph 2 P(HNPbt)(NPbt) ( 1 , HL) bearing chromophore 2-(phen-2′-yl)-1,3-benzothiazole (Pbt) substituents was synthesized and introduced into lanthanide complexes. It was found that salt metathesis reactions between KL ( 2 ) generated in situ and LnCl 3 lead to the formation of tris-iminophosphonamide complexes [LnL 2 ]L (Ln = Y ( 3 ), Sm ( 4 ), Gd ( 5 ), Dy ( 6 )), regardless of the 2 /LnCl 3 ratio. Compounds 3-6 consist of a cationic fragment [LnL 2 ] + , where the lanthanide atom is surrounded by two rigidly κ 4 -coordinated ligands, and an L − anion residing in the outer coordination sphere. Iminophosphonamine 1 shows a rare excitation wavelength-dependent two-band luminescence in the solid state. For compounds containing the deprotonated form, namely potassium salt KL and complexes of Gd and Dy, a single-band luminescence with the color changing from turquoise to orange was observed. The Sm complex reveals a set of a few narrow well-resolved bands corresponding to the f-f transitions against the background of the outer-sphere ligand's emission. A new iminophosphonamine bearing chromophore 2-(phen-2′-yl)-1,3-benzothiazole substituents was synthesized and introduced into lanthanide complexes. The photophysical properties of the obtained compounds were studied.