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Inorganic–organic hybrid semiconductors based on copper(I) halide are intriguing luminescent materials possessing great prospects as rare-earth elements (REEs) free phosphors for use in solid-state lighting (SSL). However, it is still a great challenge to develop such hybrid semiconducting materials with high energy blue light emission and good thermal stability simultaneously. Here, we have synthesized a brand new, one-dimensional (1D) organic–inorganic semiconductor CuI-Pytz (Pytz = 4-(pyrid-2-yl)-1,2,4-triazole) using a solvent diffusion method, for which the structure was determined by single crystal X-ray diffraction (SCXRD) and shows great thermal stability and decomposition temperature up to 220 °C. At room temperature, this indirect band gap hybrid semiconductor shows a blue emission centered at 464 nm which was nearing deep blue light (<460 nm) with a band gap energy of 2.70 eV. In addition, we developed a simple method for large-scale synthesis of the microcrystal, which significantly enhances the possibility of widespread applications for CuI-Pytz. Both density functional theory calculations and experimental studies reveal that the blue light emission originates from the combination of metal-to-ligand charge transfer (MLCT) and halide-to-ligand charge transfer (XLCT). The good thermal stability and high energy blue light emission make this low-cost and easily available copper(I) halide hybrid semiconductor a potential candidate for use as rare-earth free phosphors. [ABSTRACT FROM AUTHOR]

Luminescent Cu(I) complexes have drawn considerable attention as alternative materials to precious transition metal complexes due to their low cost and electron configuration. Discrete heteroleptic diamine-diphosphine copper(I) complexes have been investigated owing to their outstanding photophysical features. However, heteroleptic copper(I) coordination polymers remain mostly unexplored. Herein, we report the synthesis and photophysical characterization of a heteroleptic copper(I) coordination polymer by employing bidentate oxybis(2,1-phenylene)bis(diphenylphosphine) (POP) diphosphine and nitrogen heterocyclic 5-[4-(1-imidazolyl)phenyl]-2H-tetrazole (ipt) as ligands. By utilizing the mixed-solvent strategy, a one-dimensional (1D) linear chain was constructed under solvothermal reaction conditions. Temperature-dependent emission spectra combined with decay time measurements demonstrate that emission originated from triplet phosphorescence at ambient temperature. [ABSTRACT FROM AUTHOR]

One long-standing issue in directed C−H functionalization is that either nitrogen or sulfur atoms present in heterocyclic substrates may bind preferentially to a transition-metal catalyst rather than to the desired directing group. This competitive binding has largely hindered the application of C−H functionalization in late-stage heterocycle drug discovery. Reported here is the use of an oxazoline-based directing group capable of overriding the poisoning effect of a wide range of heterocycle substrates. The potential use of this directing group in pharmaceutical drug discovery is illustrated by diversification of Telmisartan (an antagonist for the angiotensin II receptor) through copper-mediated C−H amination, hydroxylation, thiolation, arylation, and trifluoromethylation. [ABSTRACT FROM AUTHOR]

Photoactive Cu(I) complexes are promising luminescent materials owing to their abundant reserves and marvelous biocompatibility. In this work, we report the synthesis and characterization of two binuclear sulfur‐bridged Cu(I) complexes (POP)2Cu2(μ‐HS/Cl)2 ⋅ 0.92MeOH 1 (POP=(oxybis(2,1‐phenylene))bis(diphenylphosphine)) and (POP)2Cu2(μ‐HS)22, which were prepared by one‐pot facile solvothermal method with copper‐4‐tert‐butylbenzenethiol (CuSC6H4tBu) and POP as precursors. Complex 1 exhibits sky‐blue emission while complex 2 displays blue. Complex 1 was systemically investigated by PXRD, UV‐vis spectrum, IR, TGA and steady‐state spectra. Temperature‐dependent steady‐state emission and decay lifetime indicate that complex 1 is a typical phosphorescent emitter. [ABSTRACT FROM AUTHOR]