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Room-temperature luminescence from Pd(II) and Pt(II) complexes: from mechanochromic crystals to flexible polymer matrices.
Gutierrez Suburu, Matias E; Maisuls, Iván; Kösters, Jutta; Strassert, Cristian A.
Afiliação
  • Gutierrez Suburu ME; Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, D-48149 Münster, Germany. ca.s@wwu.de.
  • Maisuls I; CeNTech, SoN, CiMIC, Westfälische Wilhelms-Universität Münster, Heisenbergstraße 11, D-48149 Munster, Germany.
  • Kösters J; Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, D-48149 Münster, Germany. ca.s@wwu.de.
  • Strassert CA; CeNTech, SoN, CiMIC, Westfälische Wilhelms-Universität Münster, Heisenbergstraße 11, D-48149 Munster, Germany.
Dalton Trans ; 51(35): 13342-13350, 2022 Sep 13.
Article em En | MEDLINE | ID: mdl-35983882
ABSTRACT
A series of Pd(II) (PdLOMe, PdLOHex) and Pt(II) (PtLOMe, PtLOHex) complexes bearing tetradentate ligands as dianionic luminophores were synthesized. Hence, the cyclometallating chelators were alternatively decorated with two n-hexyloxy (LOHex) or two methoxy (LOMe) moieties to promote crystallization and processability. The new compounds were unambiguously characterized by means of multiple NMR spectroscopies and mass spectrometry as well as by single crystal X-ray diffractometric analysis (PtLOMe and PdLOMe). Steady state and time-resolved photoluminescence spectroscopic studies were carried out in crystalline phases, in fluid solutions at room temperature, in frozen glassy matrices at 77 K and in a flexible polymeric matrix (PMMA). PtLOMe presents an intriguing mechanochromism resulting from the responsive metal-metal interactions involving adjacent monomeric units. Incorporation of the Pd(II) complexes into the polymeric matrix boosts their photophysical properties by stiffening of the coordination environment while reducing non-radiative deactivation pathways mediated by dissociative metal-centred states, which also become thermally inaccessible at 77 K.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article