Pt2Tl Building Blocks for Two-Dimensional Extended Solids: Synthesis, Crystal Structures, and Luminescence

Fuertes, S. ; Chueca, A.J. ; Martín, A. (Universidad de Zaragoza) ; Sicilia, V. (Universidad de Zaragoza)

Resumen: The ß-diketonate compounds of Pt(II), [Pt(R-C^C*)(acac)] (acacH = acetylacetone, R-CH^C* = 1-(4-cyanophenyl)-3-methyl-1H-imidazol-2-ylidene (NC-CH^C*) 1A, 1-(4-(ethoxycarbonyl)phenyl)-3-methyl-1H-imidazol-2-ylidene (CO2Et-CH^C*) 1B, 1-(3, 5-dichlorophenyl)-3-methyl-1H-imidazol-2-ylidene (Cl-CH^C*) 1C) containing cyclometalated N-heterocyclic carbenes were synthesized from compounds [{Pt(µ-Cl)(R-C^C*)}2] (R = CN A, CO2Et B, Cl C). Compound C was prepared for the first time following a step-by-step protocol used to synthesize A and B. The X-ray structures of complexes 1B and 1C show that only in 1B the molecules stack in pairs through intermolecular Pt···Pt (3.370 Å) and p-p (~3.43 Å) interactions between the NHC ligand and the acac. The reaction of compounds 1A-1C with TlPF6 (2:1 molar ratio) leads to the clusters [{Pt(R-C^C*)(acac)}2Tl]+ (R = CN 2A, CO2Et 2B, Cl 2C), which exhibit a "Pt2Tl" sandwich structure, where two slightly distorted square planar "Pt(R-C^C*)(acac)" subunits are bonded to a Tl(I) center through donor-acceptor Pt-Tl bonds. Compounds 2A and 2B show an extended two-dimensional lattice in the solid state through intermolecular Pt··Pt and Tl-E (E = N, O) interactions; meanwhile 2C forms discrete molecules without any kind of intermolecular interaction among them. The effects of the R substituent and the Pt-Tl interactions on the crystal structures and the photophysical properties have been investigated.

Idioma: Inglés

DOI: 10.1021/acs.cgd.7b00662

Año: 2017

Publicado en: CRYSTAL GROWTH & DESIGN 17, 8 (2017), 4336-4346
ISSN: 1528-7483

Factor impacto JCR: 3.972 (2017)

Categ. JCR: CRYSTALLOGRAPHY rank: 6 / 26 = 0.231 (2017) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 60 / 283 = 0.212 (2017) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 46 / 169 = 0.272 (2017) - Q2 - T1

Factor impacto SCIMAGO: 1.154 - Chemistry (miscellaneous) (Q1) - Materials Science (miscellaneous) (Q1) - Condensed Matter Physics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E21
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/CTQ2015-67461-P

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Química Inorgánica (Dpto. Química Inorgánica)