The first example of polymeric lanthanide -trifluoroacetates in chemical solution deposition of up-converting NaGdF:Yb,Er,Nd thin films

A series of lanthanide tetrakis -trifluoroacetates {(detaH 2 ) 2 [La 2 (tfa) 8 ] 2 (CH 3 CN) 5 (H 2 O) 2 } n and (detaH 2 ) n [Ln(tfa) 4 ] 2 n (Ln = Pr-Eu), mixed-ligand complexes [La(tfa) 3 (CH 3 CN)(H 2 O)] n , [Gd(tfa) 3 (deta) 2 ]( i PrOH) and [Yb(tfa) 2 (deta) 2 ](tfa), as well as detaH 2 (tfa) 2 were isolated and characterized. All lanthanide tetrakis -trifluoroacetates contain two types of 1D anionic chains [Ln(tfa) 4 ] n n − and cavities occupied by detaH 2 2+ cations and solvating H 2 O and CH 3 CN molecules. The thermal behavior of (detaH 2 ) n [Ln(tfa) 4 ] 2 n in air is investigated by TGA, in situ VT-PXRD and total X-ray scattering with PDF analysis, and the formation of metal fluorides occurs upon heating to 300 °C. The application of solution with lanthanide trifluoroacetates and diethylenetriamine (deta) as precursors for chemical deposition of β-NaGdF 4 :Er,Yb,Nd thin films is reported. The deposited β-NaGdF 4 :Er,Yb,Nd thin film demonstrates up-conversion luminescence under 980 and 808 nm laser excitation. A series of REE complexes with adaptable [Ln(tfa) 4 ] − anionic chains shed light on reactions in the precursor solution. The first MOCSD prepared β-NaGdF 4 :Er,Yb,Nd thin film shows up-conversion luminescence under 980 and 808 nm excitation.