Binuclear Pt(II) Complexes with N̂ĈN Ligands: Synthesis, Photophysical Properties, and Vapochromic Responses

Crystal Growth & Design, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Language: Английский

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Emission Wavelength Control via Molecular Structure Design of Dinuclear Pt(II) Complexes: Optimizing Optical Properties for Red- and Near-Infrared Emissions

Crystals, Journal Year: 2025, Volume and Issue: 15(3), P. 273 - 273

Published: March 15, 2025

Phosphorescent Pt(II) complexes have garnered significant attention as key components in luminescence-based systems due to their highly efficient emission properties. A notable characteristic of these is ability form excimers through strong molecular stacking concentrated solutions or solid film states. This aggregation-driven emission, primarily arising from metal–metal ligand charge transfer (MMLCT), influenced by overlapping d-orbitals oriented perpendicular the square planar structure complexes. Although this property hinders development pure blue-emitting complexes, it facilitates design materials that emit red- and near-infrared (NIR) light. By employing advanced techniques, dinuclear been optimized significantly enhance red NIR emissions modulation Pt-Pt interactions adjustments electron densities. review elucidates how control distances strategic modifications can directly influence spectra toward regions. comparative analysis recent studies underscores novelty effectiveness double-decker-type achieving characteristics long-wavelength range. These insights may guide structures for next-generation organometallic phosphorescent materials.

Language: Английский

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Luminescent Binuclear Pd (II) N^C^N‐Pincer Complexes With N^N Bridging Ligand

Applied Organometallic Chemistry, Journal Year: 2025, Volume and Issue: 39(5)

Published: April 8, 2025

ABSTRACT Two novel binuclear cyclometalated Pd (II) complexes with two tridentate phenylpyridine ligands and a N^N ligand were readily synthesized. Both structures unambiguously characterized via X‐ray single crystal diffraction, nuclear magnetic resonance (NMR) spectra, high‐resolution mass spectrometry (HRMS). The structure data reveals that the Pd–Pd distances of [Pd(1,3‐di(2‐pyridyl)benzene)] 2 (Dpf) (DpfH = N , ′‐diphenyl formamidine) Pd1 [Pd(1,3‐di(2‐pyridyl)benzene] ( α ‐Car) ‐CarH ‐carboline) Pd2 measure 3.0046(3) 3.1518(8) Å, respectively. absorption spectra display metal–metal‐to‐ligand charge transfer (MMLCT) transitions. In solid state, they show triplet emissions at 635 607 nm, While in 1 wt% PMMA film, emission peaks are located 602 571 contrast, both very weak solution their maximum wavelengths significantly red‐shifted. Based on photophysical properties, films quartz squares was placed different organic or acid solvents for 30 min then utilized to detect solvent vapor. film showed unique quenching vapor acetone.

Language: Английский

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Heteronuclear Pt^II-Pd^II Dimers Formation through Ligands Subtle Tailoring

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 12(5), P. 1812 - 1821

Published: Dec. 15, 2024

Bright Pt–Pd emitters have been synthesized for the first time, heralding a new era in phosphorescent through meticulous design and tailoring of ligands, thus introducing novel approach to preparation luminescent materials.

Language: Английский

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