Crystal Structure and Triboluminescence Spectrum of A μ2-(ONC5H5) Bridging Dinuclear Europium(III) Complex

Abstract

The crystal structure and triboluminescence spectrum of a μ2-(ONC5H5) bridging dinuclear europium(III) complex, Eu2(TTA)6(PyO)2 where HTTA=2-thenoyltrifluoroacetone, PyO=pyridine N-oxide, are reported. It is centrosymmetric and two Eu(III) atoms are bridged by two pyridine oxide oxygen atoms. The Eu……Eu distance is 4.2137(9) Å. The triboluminescence maximum is similar to that of the photoluminescence and the disorder of the thienyl rings and CF3 groups may be responsible for its triboluminescent activity. The complex crystallizes in the triclinic space group P&1macron; with cell parameters a = 12.239(1), b = 12.614(2), c = 14.048(2) Å, α = 110.31(1), β = 112.05(1), γ = 99.23(1)°, V = 1776.6(4) Å 3 and Z = 2. The strcutre was refined by full-matrix least squares methods to R = 0.0451 and R w = 0.01170.