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

An uncommon emissive pseudotetranuclear compound, {[Au-2(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 PT 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 excitation, the emissive crystalline complex presented performed using UV vis spectroscopy showed that under ultraviolet characteristic broad luminescent bands centered at 420 and 670 nm.