Ancillary ligand-assisted robust deep-red emission in iridium(iii) complexes for solution-processable phosphorescent OLEDs

2019 ◽  
Vol 7 (14) ◽  
pp. 4143-4154 ◽  
Author(s):  
Hae Un Kim ◽  
Ho Jin Jang ◽  
Wanuk Choi ◽  
Minjun Kim ◽  
Sungjin Park ◽  
...  
Keyword(s):  
Excited State ◽  
Ancillary Ligand ◽  
Red Emission ◽  
Ancillary Ligands ◽  
Solution Processable

Two different kinds of ancillary ligands such as picolinate and thenoyltrifluoroacetylacetonate have profound effects on the excited state properties of deep red emissive iridium(iii) complexes

scholarly journals The development of aryl-substituted 2-phenylimidazo[1,2-a]pyridines (PIP) with various colors of excited-state intramolecular proton transfer (ESIPT) luminescence in the solid state

2016 ◽  
Vol 4 (16) ◽  
pp. 3599-3606 ◽  
Author(s):  
Toshiki Mutai ◽  
Tatsuya Ohkawa ◽  
Hideaki Shono ◽  
Koji Araki
Keyword(s):  
Excited State ◽  
Solid State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Aryl Group ◽  
Red Emission ◽  
Wide Range

The color of ESIPT luminescence of HPIP is tuned in a wide range by the introduction of aryl group(s), and thus a series of PIPs showing blue to red emission is realized.

Synthetic Control of Excited-State Properties in Cyclometalated Ir(III) Complexes Using Ancillary Ligands

2005 ◽  
Vol 44 (6) ◽  
pp. 1713-1727 ◽  
Author(s):  
Jian Li ◽  
Peter I. Djurovich ◽  
Bert D. Alleyne ◽  
Muhammed Yousufuddin ◽  
Nam N. Ho ◽  
...  
Keyword(s):  
Excited State ◽  
Synthetic Control ◽  
Ancillary Ligands

Fine tuning through valence bond tautomerization of ancillary ligands in ruthenium(ii) arene complexes for better anticancer activity and enzyme inhibition properties

2016 ◽  
Vol 45 (48) ◽  
pp. 19277-19289 ◽  
Author(s):  
Poulami Mandal ◽  
Novina Malviya ◽  
M. Fátima C. Guedes da Silva ◽  
Sandeep Singh Dhankhar ◽  
C. M. Nagaraja ◽  
...  
Keyword(s):  
Anticancer Activity ◽  
Enzyme Inhibition ◽  
Antiproliferative Activity ◽  
Ruthenium Complex ◽  
Valence Bond ◽  
Fine Tuning ◽  
Ancillary Ligand ◽  
Arene Complexes ◽  
Ancillary Ligands

Novel valence tautomerized ancillary ligand induce antiproliferative activity in ruthenium complex.

scholarly journals Theoretical investigation on the effect of ancillary ligand modification for highly efficient phosphorescent platinum(ii) complex design

RSC Advances ◽  
2017 ◽  
Vol 7 (28) ◽  
pp. 17368-17376 ◽  
Author(s):  
Hong-Wei Fan ◽  
Fu-Quan Bai ◽  
Zhi-Xiang Zhang ◽  
Yu Wang ◽  
Ze-Xing Qu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Theoretical Investigation ◽  
Organic Light Emitting Diodes ◽  
Luminescent Materials ◽  
Ancillary Ligand ◽  
Ancillary Ligands ◽  
Light Emitting ◽  
Ligand Modification ◽  
Organic Light ◽  
Complex Design

Reasonable modification of ancillary ligands for Pt(ii) complexes can effectively improve the quantum efficiency and strengthen the rigidity of luminescent materials in organic light-emitting diodes.

Efficient red emission from poly(vinyl butyral) films doped with a novel europium complex based on a terpyridyl ancillary ligand: synthesis, structural elucidation by Sparkle/RM1 calculation, and photophysical properties

2016 ◽  
Vol 7 (5) ◽  
pp. 1147-1157 ◽  
Author(s):  
Chaolong Yang ◽  
Shaojun Liu ◽  
Jing Xu ◽  
Youbing Li ◽  
Mingyong Shang ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Europium Complex ◽  
Structural Elucidation ◽  
Ancillary Ligand ◽  
Red Emission ◽  
Ligand Synthesis ◽  
Complex Polymer ◽  
Vinyl Butyral

The first example of doped Eu-complex/polymer fluorescent films based on a PVB matrix is reported.

Synthesis, Characterization, and Photoluminescence of a Novel Eu-Containing Polymer Precursor: {Tris(acetylacetonate)5-acrylamido-1,10-phenanthroline}Europium(III)

2013 ◽  
Vol 345 ◽  
pp. 189-192
Author(s):  
Cun Jin Xu
Keyword(s):  
Excited State ◽  
Acrylic Acid ◽  
Room Temperature ◽  
Functional Group ◽  
Europium Complex ◽  
Polymer Precursor ◽  
Red Emission ◽  
Pl Spectra ◽  
First Excited State ◽  
Antenna Ligand

A new europium complex, Eu (acac)3Aphen (where Hacac and Aphen stand for acetylacetone and 5-acrylamido-1,10-phenanthroline, respectively), was synthesized and characterized by elemental analysis, IR, UV and photoluminescence (PL) spectra. The ligand Aphen not only serves as an antenna ligand but also offers a functional group for polymer precursor. The room-temperature PL spectra of the europium (III) complex are composed of the typical Eu3+ red emission, assigned to transitions between the first excited state (5D0) and the multiplet (7F04). Compared to Eu (acac)2AA (where HAA is acrylic acid), Eu (acac)3Aphen exhibits greatly enhanced quantum efficiency (i.e., 14.1% vs 28.5%) and longer 5D0 lifetime (260 μs vs 568 μs).

scholarly journals Improved Deep-Red Phosphorescence in Cyclometalated Iridium Complexes via Ancillary Ligand Modification

2019 ◽  
Author(s):  
Evanta Kabir ◽  
Steven Sittel ◽  
Boi-Lien Nguyen ◽  
Thomas Teets
Keyword(s):  
Rate Constant ◽  
Quantum Yields ◽  
Iridium Complexes ◽  
Ancillary Ligand ◽  
Ancillary Ligands ◽  
X Ray ◽  
X Ray Crystallography ◽  
Ligand Modification ◽  
Radiative Rate ◽  
Red Luminescence

In this work, we describe bis-cyclometalated iridium complexes with efficient deep-red luminescence. Two different cyclometalating (C^N) ligands‒1-phenylisoquinoline (piq) and 2-(2- pyridyl)benzothiophene (btp)‒are used with six strong π-donating ancillary ligands (L^X) to furnish a suite of 10 new complexes with the general formula Ir(C^N)2(L^X). Improvements in deep-red photoluminescence quantum yields were accomplished by the incorporation of sterically encumbering substituents onto the ancillary ligand, which can enhance the radiative rate constant (kr) and/or reduce the non-radiative rate constant (knr). Five of the complexes were characterized by X-ray crystallography, and all of them were investigated by in-depth spectroscopic and electrochemical measurements.<br>

Molecular Engineering of Ruthenium-based Photosensitizers with Superior Photovoltaic Performance in DSSC: Novel N-Alkyl 2-Phenylindole-based Ancillary Ligands

2022 ◽  
Author(s):  
Saba Ashraf ◽  
Rui Su ◽  
Javeed Akhtar ◽  
Ahmed Shuja ◽  
Humaira Masood Siddiqi ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Molecular Engineering ◽  
Ancillary Ligand ◽  
Ancillary Ligands

In this work, we report the design and successful synthesis of two new heteroleptic polypyridyl Ru(II) complexes (SD-5 and SD-6), by incorporating hetero-aromatic electron-donating N-alkyl-2-phenylindole moieties into the ancillary ligand....

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