Novel mononuclear mixed ligand complexes of heavy lanthanide trifluoroacetates with diethylenetriamine

作者：Grebenyuk Dimitry; Ryzhkov Nikolay; Tsymbarenko Dmitry^*

来源：Journal of Fluorine Chemistry, 2017, 202: 82-90.

DOI：10.1016/j.jfluchem.2017.08.014

• MOCSD
• X-ray crystal structure
• Mixed ligand complexes
• Rare earth elements
• Trifluoroacetates

Seven mixed ligand complexes of lanthanide trifluoroacetates with diethylenetriamine [Ln(tfa)(2)(deta)(2)](tfa) (Ln = Y, Dy - Lu; Htfa trifluoroacetic acid, deta diethylenetriamine) with mononuclear structure were synthesized and characterized by powder X-ray diffraction, IR and NMR spectroscopy, TGA, conventional elemental analysis; crystal structure of [Y(tfa)(2)(deta)(2)](tfa) was determined by single crystal X-ray diffraction. The structure of the new type consists of mononuclear complex cations [Y(tfa)(2)(deta)(2)](+) and outer-sphere tfa anions connected into dimeric associates by intra-dimeric H-bonds. The complexes in crystalline state demonstrate high stability to storage in air and also retain tfa - anions within the coordination sphere in solution according to the results of NMR spectroscopy. Stability of [Ln(tfa)(2)(deta)(2)](tfa) species was explained by DFT calculations. This allows their application as precursors of rare earth fluorides illustrated by synthesis of NaYF4 powder and thin films.

• 出版日期2017-10