scholarly journals Mechanistic studies on the addition of hydrogen to iridaepoxide complexes with subsequent elimination of water

2016 ◽  
Vol 7 (2) ◽  
pp. 921-931 ◽  
Author(s):  
Lauren E. Doyle ◽  
Warren E. Piers ◽  
Javier Borau-Garcia ◽  
Michael J. Sgro ◽  
Denis M. Spasyuk
Keyword(s):  
Iridium Complex ◽  
Iridium Complexes ◽  
Mechanistic Studies ◽  
Subsequent Elimination ◽  
Cooperative Activation

Iridium complexes of the PCsp2P ligand in which the donors are linked by 2,3-benzo[b]thiophene groups engage in the cooperative activation of N2O and the resulting iridaepoxides can be treated with dihydrogen to effect elimination of water and regeneration of the starting iridium complex.

Cationic Iridium Dendrimers: Synthesis and Photophysical Properties

2011 ◽  
Vol 64 (9) ◽  
pp. 1211 ◽  
Author(s):  
Bin Du ◽  
Si-Chun Yuan ◽  
Jian Pei
Keyword(s):  
Solid State ◽  
Photophysical Properties ◽  
Dendritic Structure ◽  
Benzimidazole Derivatives ◽  
Iridium Complex ◽  
Iridium Complexes ◽  
Efficient Energy Transfer ◽  
Ancillary Ligands ◽  
Synthetic Strategy ◽  
Yellow Orange

Two dendrimers, D1 and D2, containing the cationic iridium complexes (C1 and C2) as cores and truxene-functionalized chromophores as the branches, have been developed by a convergent synthetic strategy. The cationic complexes employ 3-(pyridin-2-yl)-1H-1,2,4-triazole and 2-(pyridin-2-yl)-benzimidazole derivatives as the ancillary ligands. To avoid the change in emission colour arising from the iridium complex, the conjugation between the dendron and the ligand is decoupled by separating them using the alkyl chain. An investigation of their photoluminescent features reveals that efficient energy transfer happens from the dendrons to the core in the solid state. Likewise, the charged dendritic structure is demonstrated to be an efficient method to improve the compatibility between the polar charged iridium complexes and typical hydrophobic hosts with the additional benefit of excellent solution processability. Both dendrimers exhibit strong solvatochromic behaviours in solvents and exclusive green and yellow-orange light in the solid state.

A coordinatively unsaturated iridium complex with an unsymmetrical redox-active ligand: (spectro)electrochemical and reactivity studies

2019 ◽  
Vol 48 (37) ◽  
pp. 13931-13942 ◽  
Author(s):  
Sebastian Sobottka ◽  
Margarethe Behr van der Meer ◽  
Estelle Glais ◽  
Uta Albold ◽  
Simon Suhr ◽  
...  
Keyword(s):  
Bond Activation ◽  
Iridium Complex ◽  
Iridium Complexes ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active ◽  
Metal Ligand

Metal–ligand cooperativity can be used in iridium complexes with an unsymmetrically substituted redox-active diamidobenzene ligand for bond activation reactions.

C–H activation of ethers by pyridine tethered PCsp3P-type iridium complexes

2016 ◽  
Vol 45 (24) ◽  
pp. 10007-10016 ◽  
Author(s):  
Peng Cui ◽  
Dominic C. Babbini ◽  
Vlad M. Iluc
Keyword(s):  
Iridium Complex ◽  
Iridium Complexes ◽  
Fischer Carbenes

An iridium complex supported by a PCPyP ligand featuring an internal pyridine tether showed selective mono-C–H activation of ethers, which represent intermediates in the synthesis of the corresponding Fischer carbenes.

scholarly journals Mechanistic Studies on the Alkylation of Amines with Alcohols Catalyzed by a Bifunctional Iridium Complex

ACS Catalysis ◽  
2015 ◽  
Vol 5 (6) ◽  
pp. 3704-3716 ◽  
Author(s):  
Agnieszka Bartoszewicz ◽  
Greco González Miera ◽  
Rocı́o Marcos ◽  
Per-Ola Norrby ◽  
Belén Martı́n-Matute
Keyword(s):  
Iridium Complex ◽  
Mechanistic Studies

scholarly journals Solubilised bright blue-emitting iridium complexes for solution processed OLEDs

2016 ◽  
Vol 4 (17) ◽  
pp. 3726-3737 ◽  
Author(s):  
Adam F. Henwood ◽  
Ashu K. Bansal ◽  
David B. Cordes ◽  
Alexandra M. Z. Slawin ◽  
Ifor D. W. Samuel ◽  
...  
Keyword(s):  
Blue Emission ◽  
Iridium Complex ◽  
Iridium Complexes ◽  
Solution Processed ◽  
Bright Blue

Combining a sterically bulky, electron-deficient cyclometalating C∧N ligands with an electron rich, highly rigidified N∧N ligand gives an iridium complex, that achieves extraordinarily bright blue emission (ΦPL = 90%; λmax = 459 nm in MeCN) for a cationic iridium complex.

Scope and Mechanistic Studies of Intramolecular Aliphatic C−H Bond Activation of N-Heterocyclic Carbene Iridium Complexes§

2007 ◽  
Vol 26 (18) ◽  
pp. 4618-4626 ◽  
Author(s):  
Yusuke Tanabe ◽  
Fumihiro Hanasaka ◽  
Ken-ichi Fujita ◽  
Ryohei Yamaguchi
Keyword(s):  
Bond Activation ◽  
Iridium Complexes ◽  
Mechanistic Studies

Enhanced performance of polymer bulk heterojunction solar cells employing multifunctional iridium complexes

2014 ◽  
Vol 2 (47) ◽  
pp. 10195-10200 ◽  
Author(s):  
Myoung Hee Yun ◽  
Eung Lee ◽  
Woochul Lee ◽  
Hyosung Choi ◽  
Bo Ram Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Iridium Complex ◽  
Iridium Complexes ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells ◽  
Polymer Bulk

We report a 10% enhancement of the photovoltaic performance of polymer bulk heterojunction solar cells composed of an iridium complex, P3HT, PEO and PCBM.

scholarly journals Synthesis and phosphorescent properties of the copolymers of N-vinylcarbazole, methyl methacrylate and iridium complex

2014 ◽  
Vol 32 (2) ◽  
pp. 206-213
Author(s):  
Wen Wang ◽  
Minglu Zhou ◽  
Luying Liang ◽  
Meijuan Lin ◽  
Qidan Ling
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Visible Light ◽  
Methyl Methacrylate ◽  
Radical Copolymerization ◽  
Emission Peak ◽  
Iridium Complex ◽  
Iridium Complexes ◽  
Ft Ir ◽  
Uv Visible

AbstractThe copolymers containing carbazole unit and iridium complexes, such as (Ir(bpy)2Cl, Ir(mbpy)2Cl and Ir(Brbpy)2Cl, were synthesized via radical copolymerization of N-vinylcarbazole, methyl methacrylate and iridium complex. The synthesized copolymers were characterized by FT-IR, UV-Vis absorption spectroscopy and photoluminescence (PL) spectroscopy, respectively. According to the results, the copolymers (Ir(Brbpy)2Cl/PVK and Ir(mbpy)2Cl/PVK) exhibit yellow phosphorescence with an emission peak at around 553 nm under UV-visible light in the solid state. The results also reveal almost complete energy transfer from the host carbazole segments to the guest Ir complex in the copolymer film when the Ir content reaches 1.0 wt.%. The synthesized copolymers are good candidates as blue or yellow phosphorescent materials for PLED applications.

scholarly journals Selective, Radical-Free Activation of Benzylic C-H Bonds in Methylarenes

2021 ◽  
Author(s):  
Antony Chan ◽  
Martin Jakoobi ◽  
Yan-Cong Tian ◽  
Chenxu Wang ◽  
Nathan Halcovitch ◽  
...  
Keyword(s):  
Oxidative Addition ◽  
Iridium Complexes ◽  
Mechanistic Studies

We report rare examples of exclusive benzylic C-H oxidative addition in industrially important methylarenes using simple η4-arene iridium complexes. Mechanistic studies showed that coordinatively unsaturated η2-arene intermediates are responsible for...

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