Exploring the self-assembly and energy transfer of dynamic supramolecular iridium-porphyrin systems

Abstract

Introduction.

An Unprecedented Family of Luminescent Iridium(III) Complexes Bearing a Six-Membered Chelated Tridentate C^N^C Ligand

“…= 1.17 V in deaerated CH 2 Cl 2 , where mesppy is 2-phenyl-4-mesityl-pyridinato). 49 Conversely, 3 shows a significantly anodically shifted oxidation potential at 1.14 V. The CVs of 1 – 3 show irreversible reduction waves that are monoelectronic as inferred from the respective DPVs. DFT calculations (Figure 3a) indicate that both the HOMO and HOMO–1, which are close in energy (see Figure S34 in the SI), involve the iridium and chloride atoms and the two phenyl rings of the bnpy ligand.…”

Homochiral Emissive Λ8‐ and Δ8‐[Ir8Pd4]16+ Supramolecular Cages

“…Each family of metalloligands is easily accessed in racemic form in a five step synthesis;22 however, with the aim of assessing the impact of iridium‐based chirality on the self‐assembly, we also prepared the enantiopure metalloligands Λ‐ and Δ‐[Ir(mesppy) 2 (qpy)]BF 4 (Λ‐ 1 and Δ‐ 1 ) and Λ‐ and Δ‐[Ir(dFmesppy) 2 (qpy)]BF 4 (Λ‐ 2 and Δ‐ 2 ) by using l ‐ and d ‐serine as chiral auxiliaries, following the protocol illustrated in Scheme S1 in the Supporting Information 23. The absolute configuration for each of the enantiopure iridium dimers Λ,Λ‐ D1 , Δ,Δ‐ D1 , Λ,Λ‐ D2 and Δ,Δ‐ D2 (Scheme S1) has been unambiguously determined by X‐ray crystallography (Figure S59 in the Supporting Information) and used to ascertain the absolute configurations of the enantiomers Λ‐ 1 , Δ‐ 1 , Λ‐ 2 and Δ‐ 2 23.…”

Bright green PhOLEDs using cyclometalated diiridium(iii) complexes with bridging oxamidato ligands as phosphorescent dopants

“…Ligand 3 and the derived complexes 4-6 incorporate a mesityl substituent at C4 of each of the ppy ligands as there is precedent that a mesityl group at this position significantly improves the solubility of iridium complexes in organic solvents thereby facilitating device fabrication by solution processing, while having minimal effect on the emission colour. [38][39][40][41][42][43] The m-dichloro-bridged species 4 43 was obtained in 66% yield using the standard procedure 44 by reacting 3 with IrCl 3 Á3H 2 O in 2-ethoxyethanol. Reaction of 4 with oxamide or with N,N 0 -di-tbutylphenyloxamide in the presence of sodium methoxide gave the target oxamido-bridged complexes 5 and 6 as yellow-orange solids in ca.…”