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• 1008-89-5 2-phenylpyridine 

Relevant academic research and scientific papers

Facile synthesis and complete characterization of homoleptic and heteroleptic cyclometalated Iridium(III) complexes for photocatalysis

Herein we describe an improved synthesis for homoleptic iridium(III) 2-phenylpyridine based photocatalysts that allows rapid access to these compounds in good to high yields which have recently become a vital component within the field of catalysis. In addition, we synthesized a number of heteroleptic iridium(III) 2-phenylpyridine photocatalysts and report their photophysical and electrochemical properties. The emission energies span the range of 473-560 nm and reduction potentials from -2.27 V to -1.23 V and oxidation potentials ranging from 1.81 V to 0.69 V. Additionally, we provide the calculated excited state properties and comment on the role of these properties in designing catalytic cycles.

Preparation method of mer-Ir(ppy)3

The invention discloses a preparation method of mer-Ir(ppy)3, belongs to the field of organic iridium complex luminescent materials. Particularly, mer-Ir(ppy)3 is prepared by taking iridium acetylacetonate as a precursor and o-dichlorotoluene or diethylene glycol diethyl ether as a solvent, carrying out heating reflux reaction on the precursor and 2-phenylpyridine under the protection of inert gas, conducting cooling, filtering, washing and drying and conducting column purification. According to the method, a solvent with very small solubility to mer-Ir(ppy)3 is selected, and the method has the advantages of simple process, short synthesis time, high purity, high yield and the like, and is suitable for batch preparation.

Emission Intensity Enhancement for Iridium(III) Complex in Dimethyl Sulfoxide under Photoirradiation

We found emission intensity enhancement for fac-Ir(ppy)3 (ppy = 2-(2′-phenyl)pyridine) in aerated dimethyl sulfoxide (DMSO) during photoirradiation for the first time. This phenomenon was concluded to be responsible for the consumption of 3O2 dissolved in DMSO through dimethyl sulfone production by photosensitized reaction using fac-Ir(ppy)3. A 3O2 adduct of DMSO molecule was detected by UV absorption measurement and theoretical calculation. We proposed a mechanism for the emission enhancement reaction including 1,3O2 molecules and 1,3O2-DMSO adducts and validated it through a simulation of emission intensity change using an ordinary differential equation solver.

METHOD FOR THE SYNTHESIS AND ISOLATION OF FACIAL-TRIS-HOMOLEPTIC PHENYLPYRIDINATO IRIDIUM (III) PHOTOCATALYSTS

Methods of synthesizing and isolating facial-tris-homoleptic phenylpyridinato iridium (III) photocatalysts are disclosed. Also disclosed are methods of recovering excess 2- phenylpyridine ligands from said syntheses.

Preparation of luminescent iridium complexes and precursors thereof

In the present invention, novel synthetic processes for preparing luminescent iridium complexes and precursors thereof are provided. The method employs water as the reaction solvent to prepare luminescent iridium complexes in two different ways. In the first way, a precursor [Ir2(C11NR8)4I2] (Formula I) is prepared from one of IrCl3, M3IrCl6 (M=Li, Na, K) and [Ir2(C11NR8)4Cl2], and then the precursor [Ir2(C11NR8)4I2] is converted into luminescent iridium complexes [Ir(C11NR8)2(C11NR′8)] (Formula II). In the second way, a metal complex IrCl3 or M3IrCl6 (M=Li, Na, K), HC11NR8 and a base are converted directly into the iridium complexes [Ir(C11NR8)3] (Formula VIII). Herein, R and R′ are defined the same as the specification.