Molybdenum( vi ) tris(dithiolene) complexes as a new class of three-dimensional two-photon absorption chromophores at telecommunications wavelengths

Two molybdenum(VI) tris(dithiolene) complexes with phenyl or naphthyl substituents were synthesized and their two-photon absorption properties were investigated by an open-aperture Z-scan technique using near-infrared femtosecond laser pulses. Both of these complexes exhibited significant two-photon cross sections around the wavelength of 1.3 μm, with the naphthyl substituted complex showing a two-photon cross section of 660 × 10−50 cm4 s−1 photon−1, suggesting a new class of three-dimensional chromophore for use at telecommunications wavelengths.