Photo and electroluminescence of a platinum porphyrin doping of complexes with two metal cores

Janghouri, Mohammad

doi:10.1007/s10854-017-6759-z

Cited by 2 publications

(4 citation statements)

References 33 publications

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“…The other peak at 447 nm could have been caused by an elctroplax emission between PVK and BPhen. [ 49 ] In comparing the PVK and the Tm complex emissions, the peak at 401 nm was associated with the PVK. Figure S8 (Supporting Information) shows the current‐voltage characteristics of the Tm complex‐based device.…”

Section: Resultsmentioning

confidence: 99%

Section: Electroluminescence Propertiesmentioning

confidence: 99%

“…Because the peak at 488 nm was absent in the photoluminescence spectrum of the Nd complex, the emission peak at 488 nm was associated with the Nd complex emission, and the other peak (445 nm) was due to the electroplex emission between PVK and BPhen. [49] Figures S5 and S6 (Supporting Information) present the luminance decay as a function of time and the Commission Internationale de L'Eclairage (CIE) coordinates in the Nd complexbased fabricated device, respectively. The highest luminesce of about 640 cd per m 2 was achieved at t = 0 hour.…”

Section: Electroluminescence Propertiesmentioning

confidence: 99%

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Architecture of New Rare Earth Metal Complexes as Precursors for the Fabrication of a New Class of OLEDs with Blue Shift Fluorescence

Darzinezhad

Amini

Mohajerani

et al. 2020

Zeitschrift anorg allge chemie

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Due to the high demand for blue organic light‐emitting diodes (blue‐OLED), in this work, a new class of them with lanthanide complexes is engineered based on a chemical design. Four new rare‐earth metals complexes, Nd2(C11H9NO)4(NO3)4(CH3COO)2·2(CH3OH) (1), Pr2(C11H9NO)4(NO3)4(CH3COO)2·2(CH3OH) (2), Sm2(C11H9NO)4(NO3)4(CH3COO)2·2(CH3OH) (3), and Tm2(C11H9NO)4(NO3)4(CH3COO)2·2(CH3OH) (4) as new precursors for fabrication of blue‐OLED were synthesized using 8‐hydroxy‐2‐methylquinoline as the primary ligand. The synthesized complexes were characterized by UV/Vis and infrared spectroscopy, elemental analysis, and X‐ray powder diffraction. The molecular structure of 1 and 2 as representative complexes were accomplished by single‐crystal X‐ray diffraction. The single‐crystal structures showed complexes 1 and 2 are iso‐structural. The similar X‐ray powder diffraction patterns of prepared complexes revealed the same structure for all of them. The results showed that the photoluminescence spectra of the complexes could scrutinize by the impact of rare‐earth metals. The strong blue fluorescence emission spectra of the prepared complexes showed they are suitable for the fabrication blue light‐emitting diodes using a simple processing method, and this may overcome the high demand of blue‐OLED.

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Section: Resultsmentioning

confidence: 99%

Section: Electroluminescence Propertiesmentioning

confidence: 99%

Section: Electroluminescence Propertiesmentioning

confidence: 99%

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Architecture of New Rare Earth Metal Complexes as Precursors for the Fabrication of a New Class of OLEDs with Blue Shift Fluorescence

Darzinezhad

Amini

Mohajerani

et al. 2020

Zeitschrift anorg allge chemie

Self Cite

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“…The introduction of heavy metals such as platinum and palladium into porphyrin enhances intersystem crossing (ISC) due to heavy atom spin–orbit coupling. The ISC populates the triplet state and makes them triplet emitters. − These phosphorescent emitters have been used in many areas including organic light emitting diodes (OLEDs), − phosphorescent oxygen probes, − phosphorescent imaging probes, , and dye sensitizers for photodynamic therapy . More recently, they have also been utilized as catalysts for water splitting − and as photosensitizers for solar energy conversion. ,,− Additionally, there is an increasing demand for near-IR emitters arising from applications in near-IR ranges such as infrared signaling, photodynamic therapy, tissue imaging, and more. − One effective strategy to obtain near-IR absorption and emissions is to extend the π-conjugation of porphyrins.…”

Section: Introductionmentioning

confidence: 99%

Excited-State Charge Transfer in Push–Pull Platinum(II) π-Extended Porphyrins Fused with Pentacenequinone

Washburn,

Kaswan,

Shaikh

et al. 2023

J. Phys. Chem. A

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Platinum(II) π-extended porphyrins fused with pentacenequinone and dihydropentacene have been successfully synthesized. These porphyrins were investigated using various techniques including absorption, steady-state, and time-resolved phosphorescence spectroscopy and differential pulse voltammetry. UV–vis absorption spectra of pentacenequinone-fused porphyrins (SW-Pt1 and SW-Pt2) showed unusually broad and nontypical absorption patterns. Phosphorescence spectra of SW-Pt1, SW-Pt2, and SW-Pt3 displayed similar emissions in the 704–706 nm region indicating electronic transitions of similar origin; however, the triplet lifetimes were found to be quenched in the case of both SW-Pt1 and SW-Pt2, suggesting the occurrence of excited-state events. Facile reductions were obtained for both the pentacene-quinone-fused monomer (SW-Pt2) and dimer (SW-Pt1) and were identified to be located at the pentacenequinone components. The observed orbital segregations for SW-Pt2 and SW-Pt1 from DFT calculations supported the possibility of charge transfer in these push–pull systems. Interestingly, the established energy level diagram revealed that the charge transfer from the triplet excited Pt porphyrin is thermodynamically an uphill process. Systematic studies involving both femtosecond and nanosecond transient absorption techniques revealed that the singlet excited Pt porphyrins undergo an intermediate charge transfer state prior to populating the triplet state, providing a plausible explanation for phosphorescence quenching. The lifetime of the intermediate charge transfer states was found to be 25.9 and 5.68 ps, respectively, for SW-Pt1 and SW-Pt2.

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Photo and electroluminescence of a platinum porphyrin doping of complexes with two metal cores

Cited by 2 publications

References 33 publications

Architecture of New Rare Earth Metal Complexes as Precursors for the Fabrication of a New Class of OLEDs with Blue Shift Fluorescence

Architecture of New Rare Earth Metal Complexes as Precursors for the Fabrication of a New Class of OLEDs with Blue Shift Fluorescence

Excited-State Charge Transfer in Push–Pull Platinum(II) π-Extended Porphyrins Fused with Pentacenequinone

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