RT info:eu-repo/semantics/article
T1 Access to luminescent mesophases of chiral gold(i) complexes by thermal or mechanic stimuli: the role of the tertiary carbon
A1 Barcenilla Castellano, María
A1 Folcia, César L.
A1 Ortega, Josu
A1 Etxebarria, Jesús
A1 Coco Cea, Silverio
A1 Espinet Rubio, Pablo
K1 Luminescent materials
K1 Tertiary carbon
K1 Materiales luminiscentes
K1 Carbono terciario
K1 2303 Química Inorgánica
AB Chiral gold(I) isocyanide complexes [Au(p-C6F4OR1)(p-CNC6H4(O2CC6H4OR2)] with R1, R2 or both being (R)-2-octyl, display an interesting and unprecedented response to mechanical or thermal stress. For all the complexes, heating leads to formation of Sm mesophases identified by POM, DSC, and X-ray diffraction studies. On the other hand, grinding produces soft materials which are eventually identified also as Sm metastable mesophases formed at temperatures much below the melting point. Intriguingly, only some of these mesophases (those with the tertiary carbon in the isocyanide ligand) display a strong green luminescence. The X-ray analysis supports that the melting of the crystals, either by mechanical or by thermal stress, produces a transition from regular Sm-like molecular arrangement in the solids to interdigitated-Sm arrangement in the mesophases. The molecular slippage producing this interdigitation is conditioned by the position of the bulky tertiary carbon in the molecule, which allows or impedes formation of the Au⋯Au interactions that give rise to luminescence.
PB Royal Society of Chemistry
SN 2050-7526
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/52745
UL https://uvadoc.uva.es/handle/10324/52745
LA eng
NO Journal of Materials Chemistry C, 2022,10, 941-946
NO Producción Científica
DS UVaDOC
RD 24-nov-2024