Synthesis, structures and spectroscopic properties of platinum complexes containing orthometalated 2-phenylpyridine

Ghavale, Ninad; Wadawale, Amey; Dey, Sandip; Jain, Vimal K.

doi:10.1016/j.jorganchem.2010.01.035

Cited by 53 publications

(48 citation statements)

References 55 publications

(77 reference statements)

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“…Thus, the bonds trans to the phosphine ligands are slightly shorter than those trans to the carbon atom. All the four PteN distances are, however, in conformity with those reported for pyrazolate-bridged platinum complexes [10,30,32,50,51]. The Pt/Pt separation (3.547 A) is the longest reported so far in binuclear pyrazolate-bridged platinum complexes (2.8343e3.3763 A) [10,32,50,51].…”

supporting

confidence: 84%

“…Attempts to separate these isomers either by recrystallization or by column chromatography were unsuccessful. It is worth noting that the reaction of [Pd 2 (m-Cl) 2 (Me 2 NCH 2 C 6 H 4 (o)-N,C) 2 ] with pySH yields a binuclear complex stabilized by SN bridges [11], while the reaction of [Pt 2 (m-Cl) 2 (ppy) 2 ] (ppy ¼ 2-C 6 H 4 eC 5 H 4 N) with Pb(Spy) 2 readily afforded a Pt(III) complex, [Pt 2 Cl 2 (mSpy) 2 (ppy) 2 ] [10].…”

Section: Synthesis and Spectroscopymentioning

confidence: 99%

“…However, the solid-state structure (see later) revealed a monomeric species with chelating 1,1-dithiolate group. The 1,1-dithiolate complexes of palladium and platinum with metalated nitrogen and phosphorus ligands have been described in literature [10,41] (17) [10])) the solid-state structure prevails in solution. These complexes have four-(dithiolate) and five-(metalated ligand) membered chelate rings.…”

Section: Synthesis and Spectroscopymentioning

confidence: 99%

“…Depending on the nature of E, incoming ligand and the metal atom, structural diversity in the resulting complexes is not uncommon [2]. For instance, the reaction of [Pt 2 (m-Cl) 2 (ppy) 2 ] (ppy ¼ 2-C 6 H 4 eC 5 H 4 N) with pyEH (E ¼ O or S) yields readily platinum(III) complexes, [Pt 2 Cl 2 (m-Epy) 2 (ppy) 2 ] [10], but a similar reaction of [Pd 2 (m-Cl) 2 (Me 2 NCH 2 C 6 H 4 -o) 2 ] with pySH affords a binuclear complex, [Pd 2 (m-Spy) 2 (Me 2 NCH 2 C 6 H 4 -o) 2 ] [11]. Most of the substitution reactions have been investigated on binuclear complexes containing five-membered metalated ligands and quite often with E ¼ nitrogen donor atom.…”

Section: Introductionmentioning

confidence: 99%

“…[Pt 2 (m-pz) 2 (thpy) 2 ] (thpy ¼ C 4 H 2 SeC 5 H 4 N) [50], [Pt 2 (m-pz) 2 (ppy) 2 ] [10]. The two mean square planes of platinum atom inclined with the base of the boat i.e.…”

mentioning

confidence: 99%

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Synthesis, structures and spectroscopic properties of cyclometalated tri-tert-butylphosphine complexes of platinum(II)

Ghavale

Wadawale

Dey

et al. 2010

Journal of Organometallic Chemistry

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supporting

confidence: 84%

Section: Synthesis and Spectroscopymentioning

confidence: 99%

Section: Synthesis and Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…[Pt 2 (m-pz) 2 (thpy) 2 ] (thpy ¼ C 4 H 2 SeC 5 H 4 N) [50], [Pt 2 (m-pz) 2 (ppy) 2 ] [10]. The two mean square planes of platinum atom inclined with the base of the boat i.e.…”

mentioning

confidence: 99%

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Synthesis, structures and spectroscopic properties of cyclometalated tri-tert-butylphosphine complexes of platinum(II)

Ghavale

Wadawale

Dey

et al. 2010

Journal of Organometallic Chemistry

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Multifunctional and Reactive Enantiopure Organometallic Helicenes: Tuning Chiroptical Properties by Structural Variations of Mono‐ and Bis(platinahelicene)s

Anger

Rudolph

Norel

et al. 2011

Chemistry A European J

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Acetylacetonato-platina[6]- and -platina[7]helicenes have been prepared from 2-pyridyl-substituted benzophenanthrene ligands by following a two-step cycloplatination reaction. The photophysical properties (UV-visible absorption and emission behavior) and chiroptical properties (circular dichroism and molar rotation) of the resolved enantiomers have been measured. These metallahelicenes constitute a novel family of easily accessible helicene derivatives that exhibit large and tuneable chiroptical properties that can be rationalized theoretically and compared to the parent [6]- and [7]carbohelicenes. Furthermore, they are red phosphors at room temperature and their large chiroptical properties can be modulated by oxidation of the metal center to Pt(IV). Hetero- and homochiral diastereomeric bis(metallahelicene)s that possess a rare Pt(III)-Pt(III) scaffold bridged by benzoato ligands have also been prepared. It is shown that the heterochiral (P,M)-bis(Pt(III)-[6]helicene) 9a(1) can isomerize into the homochiral (P,P)- and (M,M)-bis(Pt(III)-[6]helicene) 9a(2). Spectral assignments and an analysis of the optical rotation of these systems were made with the help of time-dependent density functional theory. The calculations highlight the contributions of the metal centers to the chiroptical properties. For 9a(1) and 9a(2), σ-π conjugation between the helicenes and the Pt-Pt moiety may contribute strongly to the optical rotation and electronic circular dichroism.

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The Chameleonic Nature of Platinum(II) Imidazopyridine Complexes

Pinter

Pittkowski

Soellner

et al. 2017

Chemistry A European J

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The synthesis and characterization of cyclometalated C^C* platinum(II) complexes with unique photophysical properties, aggregation induced enhancement of the quantum yields with a simultaneous decrease of phosphorescence lifetimes, is reported. Additionally, a change of emission color is induced by variation of the excitation wavelength. The aggregation behavior of these complexes is controlled by the steric demand of the substituents. The photophysical properties of these complexes are investigated through emission-excitation matrix analysis (EEM). The monomeric complexes are excellent room temperature phosphorescent blue emitters with emission maxima below 470 nm and quantum yields of up to 93 %.

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Synthesis, structures and spectroscopic properties of platinum complexes containing orthometalated 2-phenylpyridine

Cited by 53 publications

References 55 publications

Synthesis, structures and spectroscopic properties of cyclometalated tri-tert-butylphosphine complexes of platinum(II)

Synthesis, structures and spectroscopic properties of cyclometalated tri-tert-butylphosphine complexes of platinum(II)

Multifunctional and Reactive Enantiopure Organometallic Helicenes: Tuning Chiroptical Properties by Structural Variations of Mono‐ and Bis(platinahelicene)s

The Chameleonic Nature of Platinum(II) Imidazopyridine Complexes

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