A new set of luminescent platinum(II) diimine complexes has been synthesized and characterized. The anionic ligands in these are arylacetylides. brightly emissive fluid solution with relative emission quantum yields phiem ranging from 3 x 10(-3) to 10(-1). Two series have investigated. first the formula Pt(Rphen)(C...CC6H5)2 where Rphen is 1,10-phenanthroline substituted 5-position R = H, Me, Cl, Br, NO2, or C...CC6H5, while second Pt(dbbpy)(C=CC6H4X)2 dbbpy 4,4'-di(tert-butyl)bipyridine X...

A donor−chromophore−acceptor triad (D−C−A) in which the chromophore is a Pt diimine bis(acetylide) moiety (red), donor phenothiazine (blue), and acceptor nitrophenyl (green) has been synthesized studied spectroscopically. Irradiation leads to charge-separated state that 70 ns lifetime as measured by transient absorption spectroscopy.

This review presents the main class of organophosphorus compounds (triaryl phosphines, phosphazenes, phospholes, phosphetes and diphosphacyclobutanes), which have been used in electronic devices (organic light-emitting diodes (OLEDs), organic photovoltaic cells (OPV cells), dye-sensitized solar (DSSCs), field-effect transistors (OFETs), electrochromic cells).

The photophysical, electrochemical, and optoelectronic properties of conjugated systems incorporating dibenzophosphole or phosphole moieties are described. Dibenzophosphole derivatives not suitable materials for OLEDs due to their weak photoluminescence (PL) in the solid state instability devices. Variation substitution pattern phospholes chemical modification P atoms afford thermally stable derivatives, which photo- electroluminescent. Comparison optical solution thin film thioxophospholes...

Two series of 2,5-dipyridyl- and 2,5-dithienylphosphole derivatives containing σ3- or σ4-P atoms were prepared, their optical (UV/Vis absorption, fluorescence spectra) electrochemical properties systematically evaluated. These physical depend mainly on the natures 2,5-substituents phosphorus moiety, they revealed that these compounds contain extended π-conjugated systems. Structure–property relationships established basis experimental data ab initio calculations parent molecules. The limited...

Exploiting the reactivity of P-atom phosphole-based oligomers, we have achieved access to first organophosphorus-containing organic light-emitting diode (OLED) materials. The versatility these P-materials is demonstrated with synthesis a corresponding gold complex that has also been used as an OLED material. Optimization devices by doping phosphole layer red fluorescent dye described.

Room temperature phosphorescence has been observed in a synthetically facile Pt(II) complex, Pt(dbbpy)(CtriplebondC-pyrene)(2) (dbbpy = 4,4'-di(tert-butyl)-2,2'-bipyridine; CtriplebondC-pyrene 1-ethynylpyrene), fluid solution. The static and time-resolved absorption luminescence data are consistent with emerging from the appended CtriplebondC-pyrenyl units following excitation into low energy dpi Pt --> pi* dbbpy metal-to-ligand charge transfer bands.

A synthetic route to planar P-modified polycylic aromatic hydrocarbons (PAHs) is described. The presence of a reactive σ(3),λ(3)-P moiety within the sp(2)-carbon scaffold allows preparation new family PAHs displaying tunable optical and redox properties. Their frontier molecular orbitals (MOs) are derived from corresponding phosphole MOs show extended conjugation with entire π framework. coordination ability P center coordination-driven assembly two onto Au(I) ion.

An elegant and flexible synthesis of pyrene-based dyads bearing ruthenium or osmium chromophoric moieties connected through a single C≡C bond Pt(C≡C)2 spacer is described (see picture). Photophysical properties reveal that the two Ru-based units enter into reversible triplet energy transfer with appended pyrene. This effect responsible for unusual prolongation excited (40 17 μs, pyr–Ru pyr–Pt–Ru, respectively).

Extended π-conjugated systems and tunable optic properties are characteristic for compounds with linear backbones based on electron-donating thiophene, electron-accepting pyridine, a σ3,λ3-phosphole core. The oligomers 1 2 fluorescent chromophores and, 2, these through chemical modification of the phosphorus-bound chalcogen atom. σ4,λ4 derivatives electropolymerized to electroactive polymers. Y=lone electron pair, or O, S, Se

Efficient white-light-emitting LEDs have been constructed by varying the substitution pattern of phosphole derivatives and chemical modification their P atoms, producing thermally stable that are used as suitable dopants in a blue-light-emitting host. The devices exhibit high brightness and, due to simple structures, current-independent CIE coordinates. Detailed facts importance specialist readers published ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or...

A synthetic route to novel benzofuran-fused phosphole derivatives 3–5 is described. These compounds showed optical and electrochemical properties that differ from their benzothiophene analog. Preliminary results show 4 can be used as an emitter in OLEDs, illustrating the potential of these new for opto-electronic applications.

Vastly improved photophysical properties of terminal RuII terpyridine-based chromophores is achieved by insertion an ethynylene group between the terpyridine ligand and a covalently linked aromatic nucleus. In case where nucleus possesses vacant coordination sites, as shown in 1, complexation certain cations (e. g., Zn2+ , Cd2+ or Ba2+ ) at central unit gives further improvement photoproperties due to better blending respective LUMO levels.

Abstract The control of the doping ratio a blue‐emitting matrix by an orange emitter with high accuracy still remains very challenging in development reproducible white organic light‐emitting diodes (WOLEDs). In this work, organophosphorus dopant that presents rate order to reach emission is reported. increase has small impact on CIE co‐ordinates and EQE. These results are appealing towards “easy‐to‐make” WOLEDS.

Abstract We describe the synthesis and physical properties of polyaromatic hydrocarbons (PAHs) containing a phosphorus atom at edge. In particular, impact successive addition aromatic rings on electronic was investigated by experimental (UV/Vis absorption, fluorescence, cyclic voltammetry) theoretical studies (DFT). The recorded in solution solid state showed that P‐containing PAHs exhibit expected for an emitter white organic light‐emitting diodes (WOLEDs).

Abstract Novel conjugated, pyridyl‐functionalised triazaphospholes with either t Bu or SiMe 3 substituents at the 5‐position of N PC heterocycle have been prepared by a [3+2] cycloaddition reaction and compared structurally related, triazole‐based systems. Photoexcitation 2‐pyridyl‐substituted triazaphosphole gives rise to significant fluorescence emission quantum yield up 12 %. In contrast, all‐nitrogen triazole analogue shows no all. DFT calculations indicate that 2‐pyridyl substituted...

The lateral CC-π-extension of perylene diimides ( PDI s) to coronene CDI leads undesired effects such as the decrease absorption and a hypsochromic shift. This could be overcome by BN-annulation s form superior BNCDIs .

Grafting an ethynylated-pyrene moiety to a Ru(II) or Os(II) polypyridine complex perturbs the photophysical properties of metal fragment and, when relevant energy levels are properly balanced, provides 115-fold prolongation triplet lifetime.

To study the ability of sigma-P-P skeleton to mediate interaction between pi-chromophores, 1,1'-biphospholes bearing phenyl or thienyl substituents at 2,2' and 5,5'-position have been prepared studied. These air-stable derivatives are readily available via a "one-pot" synthesis starting from diynes. Theoretical studies UV-vis data clearly establish that two pi-systems interact bridge. This through-bond results in lowering optical HOMO-LUMO gap assemblies. The nucleophilic sigma(3)-P centers...