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Cross-conjugated bifunctional species including a phosphine, phosphine oxide, phosphine sulfide, phosphonium salt, phosphorus ylide and a gold(i) phosphine complex have been prepared. The photophysical characteristics of the series of compounds have been determined experimentally and are discussed/compared with simpler analogues lacking cross-conjugated branches and rationalized on the basis of DFT calculations. [ABSTRACT FROM AUTHOR]

A sterically-encumbered 5,5′-distyryl-2,2′-bipyridyl derivative that enforces a 1 : 1 metal-to-ligand ratio acts as a selective turn-on sensor for Zn2 in THF. [ABSTRACT FROM AUTHOR]

The terphspan scaffold was employed to support a bis(N-heterocyclic carbene) ligand (1) that provides a m-terphenyl canopy over one side of its metal complexes. Single-crystal X-ray diffraction studies on a silver complex of {[Ag(1)]AgBr2}2revealed an unusual tetranuclear silver core with a Ag–Ag bond distance of 3.0241(8) with 1as a trans-chelating ligand (C–Ag–C = 171°). A preliminary X-ray structure of pseudo-square planar [PdCl2(1)] showed a similar binding mode of 1(C–Pd–C = 177°). High yields were obtained in Suzuki–Miyaura coupling reactions utilizing [PdCl2(1)] as the procatalyst and the results were compared with analogous complexes of trans-spanning diphosphine (2) and diphosphinite (3) complexes. The diphosphinite complex, [PdCl2(3)], decomposes to [μ-ClPd(PPh2OH)(PPh2O)]2at room temperature. [ABSTRACT FROM AUTHOR]

New fluorinated arylene vinylene ether (FAVE) polymers were prepared by a facile, metal-free condensation polymerization of fluorene, phenylenevinylene, dithiophene, or thiadiazole chromophore-containing bisphenols with bis(trifluorovinyloxy)biphenyl. The addition of chromophores encapsulated into the polymers were prepared in good yields and characterized by 1H and 19F NMR and GPC. Thermal analysis by differential scanning calorimetry (DSC) confirmed the polymers are entirely amorphous and are easy to solution process, producing optically transparent, flexible films. Thermal gravimetric analysis (TGA) showed they possess high thermal stability with decomposition temperatures of 340−387 °C and 308−443 °C in nitrogen and air, respectively. Chromophore inclusion was confirmed by ultraviolet−visible (UV−vis) spectroscopy, which demonstrated tailorable photoluminescence (PL) in both the solution and the solid state by selective substitution of the chromophore. Polymer thin film PL studies revealed notable red-shifts compared with polymer solutions presumably attributable to aggregation in the solid state. Solution quantum yields of the polymers were comparable to those reported for the single chromophores used in this study. [ABSTRACT FROM AUTHOR]