Cyclometalated Ir(iii) complexes towards blue-emissive dopant for organic light-emitting diodes: fundamentals of photophysics and designing strategies

Abstract

The fundamental photophysics of cyclometalated Ir(iii) complexes and surveys design strategies for efficient blue phosphorescent Ir(iii) complexes are summarised.

Solvatochromism and Theoretical Studies of Dicyanobis(phenylpyridine)iridium(III) Complex Using Density Functional Theory

“…Consequently, it is clear from the calculation that three transitions were get involved (Table 1). The contributions to these transitions show that the prominent peaks of the spectra are a combination of a blue shift 1 MLCT transitions from various Ir d orbitals to ppy ligands (as expected) and 1 π-π* transition on the ppy moiety [3,[29][30].…”

“…The anionic complex [Ir(ppy)2(CN)2]which is one of the general family of iridium(III) complexes based on cyclometallating phenylpyridine ligands, has attained eminence recently for its needed photophysical properties [1][2][3][4]. Luminescent cyanometallate [Ir(ppy)2(CN)2] -(Fig.…”

Exploring the Full Potential of Photocatalytic Carbon Dioxide Reduction Using a Dinuclear Re2Cl2 Complex Assisted by Various Photosensitizers

“…reductive quenching by sacrificial electron donors should be feasible), only few photosensitizers can be considered (Table 1). Especially Ir and Cu (Scheme 1) do match these conditions and were chosen for further catalytic experiments [41–43] . As sacrificial reductants either triethylamine (TEA), triethanolamine (TEOA) or 1,3‐dimethyl‐2‐phenylbenz‐imidazoline (BIH), or a combination of these ( vide infra ) were selected [44] .…”

“…Especially Ir and Cu (Scheme 1) do match these conditions and were chosen for further catalytic experiments. [41][42][43] As sacrificial reductants either triethylamine (TEA), triethanolamine (TEOA) or 1,3-dimethyl-2-phenylbenz-imidazoline (BIH), or a combination of these (vide infra) were selected. [44] In earlier studies, TEOA was used in most cases.…”

Sensitized Photocatalytic CO2 Reduction With Earth Abundant 3d Metal Complexes Possessing Dipicolyl-Triazacyclononane Derivatives

“…The catalysis mixture is placed in front of a 200 W Hg-lamp equipped with a 400 nm low-wavelength cut-off filter to exclude UV light. Ir was selected because of its ability to still absorb solar photons in the region of 400–460 nm ( Becker et al, 2020 ) and its potentially well suited (excited state) redox properties ( Table 1 ) ( Koike and Akita, 2014 ; Lee and Han, 2020 ; Giereth et al, 2021 ). For this work we just focused on the gaseous reduction products formed and did not investigate the formation of liquid products.…”