Cationic Platinum(II) Complexes Bearing Aryl-BIAN Ligands: Synthesis and Structural and Optoelectronic Characterization

Bay-Region Functionalisation of Ar-BIAN Ligands and Their Use Within Highly Absorptive Cationic Iridium(III) Dyes

“…We had previously assigned the first oxidation wave at 1.22 V to be localised on the N , N -dimethylaniline fragment, while the second oxidation consisted of contributions from the C^N ligands and the Ir IV /Ir III redox couple. The incorporation of an electron-donating MeO group leads to a cathodic shift in both the reduction and oxidation waves 20 , 21 , 24 , 37 . The oxidation waves are more substantively affected with substitution at the 3-position resulting in a 0.13 V shift of E 1 ox to lower potential in 3 compared to a more modest 0.03 V shift in 2 with the 4MeO-5Meppy C^N ligand.…”

“…Our team has sought to expand the library of potential candidates for light harvesting by developing iridium and other metal complexes composed of bis(arylimino)acenaphthene (Ar-BIAN) ligands that are highly modular and can be readily synthesised from commercially available reagents 20 – 24 . The Ar-BIANs are known to be versatile π-acceptors and have been employed for hydroamination and hydrogenation catalysis with iridium complexes 25 – 27 .…”

Complexes of Cobalt(II) Iodide with Pyridine and Redox Active 1,2-Bis(arylimino)acenaphthene: Synthesis, Structure, Electrochemical, and Single Ion Magnet Properties

“…The ligand dpp-BIAN is widely known for its unique ability to accept reversibly up to four electrons [13], which allows one to control the ligand field strength over a wide range. Moreover, the catalytic activity towards a number of industrially important reactions [14][15][16][17], visible light-harvesting behavior for potential photovoltaic applications [18,19], biological activity [20], as well as ability for small molecule activation [21] shown by transition metal complexes of neutral, mono-, and dianionic forms of dpp-BIAN could be finely tuned due to the unique redox features of this ligand [22][23][24][25][26][27][28]. On the other hand, the possibility of reversible generation of radical anions ([(dpp-BIAN) 0 ] [(dpp-BIAN) •− ]) may allow the exchange interactions of the ferromagnetic nature in the complex molecule to be switched on, which can also have an effect on the SIM magnetization reversal barrier.…”

Unusual Reactivity and Photophysical Properties of Platinum(II) Pincer Complexes Containing 6,6'‐Diphenyl‐2,2'‐bipyridine Ligands

“…Pt(II) complexes containing NNC pincer ligands is a well-known class of luminescent compounds showing outstanding photophysical characteristics, [1][2][3][4][5] which depend on the composition and structure of the NNC aromatic system and on the properties of lateral ligand occupying the fourth coordination position. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] The most part of these compounds are based on the 6-phenyl-2,2′-bipyridine coordinating moiety, [6,7,15,[17][18][19][20][21][22][23] which can be decorated with the substituents at bipyridine and phenyl fragments thus making possible to modify emission parameters of the final chromophores [8][9][10][11][12][13] and their physicochemical properties for various applications. [20,21,23,24] Surprisingly, a closely analogous and easily synthesized 6,6′-diphenyl-2,2′-bipyridine ligand was very rarely used [25,…”