Uncommon and Emissive {[Au2(C3H6NS2)2][Au(C3H6NS2)2]2(PF6)2} Mixed Au+ and Au3+ Pseudotetranuclear Crystalline Compound: Synthesis, Structural Characterization, and Optical Properties
journal contribution
posted on 2016-10-19, 00:00 authored by Ana P. Langaro, Ana K.
R. Souza, Claudio Y. Morassuti, Sandro M. Lima, Gleison A. Casagrande, Victor M. Deflon, Luiz A. O. Nunes, Luis H. Da Cunha AndradeAn uncommon emissive pseudotetranuclear
compound, {[Au2(C3H6NS2)2][Au(C3H6NS2)2]2(PF6)2}, was synthesized and characterized
in terms
of its structure and optical properties. The synthesis produced a
crystalline compound composed of four gold atoms with two different
oxidation states (Au+ and Au3+) in the same
crystalline structure. The title complex belonged to a triclinic crystalline
system involving the centrosymmetric P1̅ space
group. X-ray diffractometry and vibrational spectroscopy (infrared,
Raman, and SERS) were used for structural characterization of the
new crystal. The vibrational spectroscopy techniques supported the
X-ray diffraction results and confirmed the presence of bonds including
Au–Au and Au–S. Optical characterization performed using
UV–vis spectroscopy showed that under ultraviolet excitation,
the emissive crystalline complex presented characteristic broad luminescent
bands centered at 420 and 670 nm.
