Cyclometalated platinum(<scp>ii</scp>) complexes with acyclic diaminocarbene ligands for OLED application

Katkova, Svetlana A.; Kozina, Daria O.; Kisel, Kristina S.; Sandzhieva, Maria A.; Tarvanen, Dmitriy; Makarov, Sergey; Porsev, Vitaly V.; Tunik, Sergey P.; Kinzhalov, Mikhail A.

doi:10.1039/d3dt00080j

Cited by 8 publications

(2 citation statements)

References 59 publications

(29 reference statements)

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“…Typically, such materials possess several advantages, which lead to innovations, especially in the area of electronic devices like lighting, screens, or sensors. , Luminescent metal complexes are well-established emitters for organic light-emitting diodes (OLEDs), taking advantage of the heavy-metal atom-induced spin–orbit coupling (SOC) effect . In the past decade, large libraries of iridium(III) − and platinum(II) − complexes with tridentate − and tetradentate ligands − were synthesized and investigated with respect to their photophysical properties. Meanwhile, purely organic emitters have overcome quantum efficiency limitations due to spin statistics utilizing specific molecular design strategies, separating the highest occupied molecular orbitals (HOMOs) from the lowest unoccupied molecular orbitals (LUMOs).…”

Section: Introductionmentioning

confidence: 99%

Blue Light-Emitting Cyclometalated Spirofluorenexanthene Imidazolylidene Platinum(II) Complexes

Riesebeck,

Strassner

2023

Organometallics

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Cyclometalated 2′-spirofluorenexanthene imidazolylidene (SFX-NHC) Pt(II) complexes with acetylacetonate, 1,3-bis(2,4,6trimethylphenyl)propane-1,3-dionate, and dihydrobis(3,5-dimethylpyrazole-1-yl)borate auxiliary ligands were synthesized from readily available 2′bromospiro[fluorene-9,9′-xanthene] (2′-Br-SFX) and characterized and investigated in terms of their photophysical properties. Photophysical properties were studied in 2 wt % PMMA films at room temperature and 2-MeTHF at 77 K. The radiative decay times vary between 4 and 48 μs. The emission peak maxima are at 420, 430, and 480 nm with photoluminescence quantum yields up to 76% and blue Commission Internationale de l'E ́clairage (CIE) xy coordinates of (0.15, 0.12).

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Section: Introductionmentioning

confidence: 99%

Blue Light-Emitting Cyclometalated Spirofluorenexanthene Imidazolylidene Platinum(II) Complexes

Riesebeck,

Strassner

2023

Organometallics

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“…They effectively catalyze the processes of C-C cross-coupling [4][5][6][7][8], hydrosilylation [9][10][11], and C≡C triple-bond activation [12,13]. Moreover, several compounds are recognized as promising antitumor agents [14,15], probes of mercury(II) ions in solutions [16], and components of OLED devices [17].…”

Section: Introductionmentioning

confidence: 99%

Conformation-Associated C···dz2-PtII Tetrel Bonding: The Case of Cyclometallated Platinum(II) Complex with 4-Cyanopyridyl Urea Ligand

Baykov,

Katlenok,

Baykova

et al. 2024

IJMS

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The nucleophilic addition of 3-(4-cyanopyridin-2-yl)-1,1-dimethylurea (1) to cis-[Pt(CNXyl)2Cl2] (2) gave a new cyclometallated compound 3. It was characterized by NMR spectroscopy (1H, 13C, 195Pt) and high-resolution mass spectrometry, as well as crystallized to obtain two crystalline forms (3 and 3·2MeCN), whose structures were determined by X-ray diffraction. In the crystalline structure of 3, two conformers (3A and 3B) were identified, while the structure 3·2MeCN had only one conformer 3A. The conformers differed by orientation of the N,N-dimethylcarbamoyl moiety relative to the metallacycle plane. In both crystals 3 and 3·2MeCN, the molecules of the Pt(II) complex are associated into supramolecular dimers, either {3A}2 or {3B}2, via stacking interactions between the planes of two metal centers, which are additionally supported by hydrogen bonding. The theoretical consideration, utilizing a number of computational approaches, demonstrates that the C···dz2(Pt) interaction makes a significant contribution in the total stacking forces in the geometrically optimized dimer [3A]2 and reveals the dz2(Pt)→π*(PyCN) charge transfer (CT). The presence of such CT process allowed for marking the C···Pt contact as a new example of a rare studied phenomenon, namely, tetrel bonding, in which the metal site acts as a Lewis base (an acceptor of noncovalent interaction).

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Green and warm-white light-emitting diodes enabled by zero-dimensional green-emitting Mn(II) bromide complex with record high efficiency

Gopalan Sree,

Jana,

Chan Cho

et al. 2023

Chemical Engineering Journal

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Cyclometalated platinum(ii) complexes with acyclic diaminocarbene ligands for OLED application

Abstract: A novel series of cyclometalated platinum(II) complexes bearing acyclic diaminocarbene (ADC) ancillary ligands was designed and prepared. Their photophysical properties were systematically studied through experimental and theoretical investigations. All complexes...

Cited by 8 publications

References 59 publications

Blue Light-Emitting Cyclometalated Spirofluorenexanthene Imidazolylidene Platinum(II) Complexes

Blue Light-Emitting Cyclometalated Spirofluorenexanthene Imidazolylidene Platinum(II) Complexes

Conformation-Associated C···dz2-PtII Tetrel Bonding: The Case of Cyclometallated Platinum(II) Complex with 4-Cyanopyridyl Urea Ligand

Green and warm-white light-emitting diodes enabled by zero-dimensional green-emitting Mn(II) bromide complex with record high efficiency

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