Synthesis, characterisation and nonlinear optical properties of tetrahedral clusters Cp2Mo2ME(CO)7, (M=Fe, Ru, Os; E=S, Se)
摘要:
A set of new chalcogen-bridged mixed metal clusters, Cp2Mo2M(mu(3)-E)(CO)(7), (M = Fe, Ru, Os; E = S, Se) have been synthesised and characterised by IR and NMR spectroscopy, and structures of Cp2Mo2Ru(mu(3)-Se)(CO)(7) and Cp2Mo2Os(mu(3)-Se)(CO)(7) have been established by single crystal X-ray diffraction methods. The nonlinear optical properties of these clusters were investigated through the Z-scan technique, using 35 ps laser pulses at 532 nm. We report large refractive third order nonlinearity for these clusters indicating their promise for optical limiting applications. (C) 1998 Elsevier Science S.A. All rights reserved.