title: 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.
abstract: An 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.
authors.affiliation: Grupo de Espectroscopia Óptica e Fototérmica-GEOF, Centro de Estudos em Recursos Naturais-CERNA, Universidade Estadual de Mato Grosso do Sul - UEMS , CP 351, Dourados, Mato Grosso do Sul 79804-970, Brazil.
authors.forename: Ana P
authors.initials: AP
authors.lastname: Langaro
authors.affiliation: Grupo de Espectroscopia Óptica e Fototérmica-GEOF, Centro de Estudos em Recursos Naturais-CERNA, Universidade Estadual de Mato Grosso do Sul - UEMS , CP 351, Dourados, Mato Grosso do Sul 79804-970, Brazil.
authors.forename: Ana K R
authors.initials: AK
authors.lastname: Souza
authors.affiliation: Grupo de Espectroscopia Óptica e Fototérmica-GEOF, Centro de Estudos em Recursos Naturais-CERNA, Universidade Estadual de Mato Grosso do Sul - UEMS , CP 351, Dourados, Mato Grosso do Sul 79804-970, Brazil.
authors.forename: Claudio Y
authors.initials: CY
authors.lastname: Morassuti
authors.affiliation: Grupo de Espectroscopia Óptica e Fototérmica-GEOF, Centro de Estudos em Recursos Naturais-CERNA, Universidade Estadual de Mato Grosso do Sul - UEMS , CP 351, Dourados, Mato Grosso do Sul 79804-970, Brazil.
authors.forename: Sandro M
authors.initials: SM
authors.lastname: Lima
authors.affiliation: Instituto de Química, Universidade Federal de Mato Grosso do Sul - UFMS , Av. Senador Filinto Muller, 1555, 79074-460, Campo Grande, Mato Grosso do Sul, Brazil.
authors.forename: Gleison A
authors.initials: GA
authors.lastname: Casagrande
authors.affiliation: Instituto de Química, Universidade de São Paulo, São Carlos , CP 780, Av. do Trabalhador São Carlense, 400, Centro, 13560-970 São Carlos, São Paulo, Brazil.
authors.forename: Victor M
authors.initials: VM
authors.lastname: Deflon
authors.affiliation: Laboratório de Laser e Aplicações, Instituto de Física de São Carlos, Universidade de São Paulo , São Carlos, São Paulo 05508-020, Brazil.
authors.forename: Luiz A O
authors.initials: LA
authors.lastname: Nunes
authors.affiliation: Grupo de Espectroscopia Óptica e Fototérmica-GEOF, Centro de Estudos em Recursos Naturais-CERNA, Universidade Estadual de Mato Grosso do Sul - UEMS , CP 351, Dourados, Mato Grosso do Sul 79804-970, Brazil.
authors.forename: Luis H
authors.initials: LH
authors.lastname: Da Cunha Andrade