RT info:eu-repo/semantics/article
T1 Triphenylene-ethylammonium tetrachlorometallate salts: multicolumnar mesophases, thermochromism and Langmuir films
A1 Barcenilla Castellano, María
A1 Baena Alonso, María Jesús
A1 Donnio, Bertrand
A1 Heinrich, Benoît
A1 González Gutiérrez, Lucía
A1 Coco Cea, Silverio
A1 Espinet Rubio, Pablo
K1 Sales mesomórficas
K1 Mesomorphic salts
K1 23 Química
AB This study reports new mesomorphic benzylethylammonium salts containing a 2,3,6,7,10-pentakis(dodecyloxy)-11-(hexyloxy)triphenylene unit and Cl− or [MCl4]2− (M = Cu, Ni, Co, Mn) as counterions. They show a rich columnar polymesomorphism, characterized by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and small- and wide-angle X-ray scattering (S/WAXS). All the compounds self-organize into multisegregated structures in the solid state and in the mesophases, with the alternation within large superlattices of triphenylene-containing columns and benzylammonium chloride or tetrachorometallate fragments. Interestingly, the nickel derivative displays a continuous and reversible thermochromic behavior in the range of 50–80 °C. Magnetic measurements and UV-Vis data at different temperatures, support changes in the coordination sphere of the Ni(II) atom from octahedral to tetrahedral. Furthermore, these systems form stable and homogeneous Langmuir films at the air–water interface. These films have been successfully transferred onto solid substrates giving rise to nanostructured LB films with a clearly defined bilayer structure in which each layer consists of molecular columns aligned along the surface.
PB Royal Society of Chemistry
SN 2050-7526
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/59479
UL https://uvadoc.uva.es/handle/10324/59479
LA eng
NO Journal of Materials Chemistry C, 2022, 10, 9222.
NO Producción Científica
DS UVaDOC
RD 21-dic-2024