Ionic Bent-Core Pillar[]arenes: From Liquid Crystals to Nanoaggregates and Functional Applications.

Herein, we report the first examples of supramolecular systems from bent-core-based pillar[]arenes through ionic bonds. These ionic materials have been prepared by the interaction of an amino-ended pillar[5]arene (P5N10) and three different carboxylic acids, including bent-core moieties. The bent-core units are based on ester, biphenyl, and azobenzene structures bearing two different flexible spacers between the carboxyl group and the central bent-core aromatic units.

Suitability of strontium and cobalt-free perovskite cathodes with LaSiAlO apatite electrolyte for intermediate temperature solid oxide fuel cells.

Aluminium-doped lanthanum silicate (LSAO) apatite-type compounds have been considered as promising candidates for substituting yttria-stabilized zirconia (YSZ) as electrolytes for intermediate temperature solid oxide fuel cells (IT-SOFC). Nevertheless, not many materials have been reported to work as cathodes in a LSAO apatite-based cell. In the present work, eight different strontium and cobalt-free compounds with a perovskite-type structure and the general composition LaM1-xNxO3-δ (where M = Fe, Cr, Mn; N = Cu, Ni; and x = 0.

Measuring Membrane Permeation Rates through the Optical Visualization of a Single Pore.

Membranes are a critical technology for energy-efficient separation processes. The routine method of evaluating membrane performance is a permeation measurement. However, such measurements can be limited in terms of their utility: membrane microstructure is often poorly characterized; membranes or sealants leak; and conditions in the gas phase are poorly controlled and frequently far-removed from the conditions employed in the majority of real processes.

Interacting plasmon and phonon polaritons in aligned nano- and microwires.

The availability of macroscopic, nearly periodic structures known as eutectics opens a new path for controlling light at wavelength scales determined by the geometrical parameters of these materials and the intrinsic properties of their component phases. Here, we analyze the optical waveguiding properties of eutectic mixtures of alkali halides, formed by close-packed arrangements of aligned cylindrical inclusions. The wavelengths of phonon polaritons in these constituents are conveniently situated in the infrared and are slightly larger than the diameter and separation of the inclusions, typically consisting on single-crystal wires down to submicrometer diameter.

Broadband laser tunability of Nd3+ ions in 0.8CaSiO3-0.2Ca3(PO4)2 eutectic glass.

Site-selective spectroscopy and stimulated emission experiments performed in the (4)F(3/2)-->(4)I(11/2) laser transition of Nd(3+)-doped 0.8CaSiO(3-) 0.2Ca(3)(PO(4))(2) eutectic glass are presented.

Synthesis of Heteronuclear Pt-Tl Complexes with Donor-Acceptor Bonds. X-ray Structures of cis-[Tl(&mgr;(2)-OOCCH(3))Pt(PPh(3))(C(6)F(5))(2)] and (NBu(4))(2)[{Pt(C(6)F(5))(3)}(2){(&mgr;(2)-O,&mgr;(3)-O'CCH(3))Tl}(2)].

Reactions of the anionic platinum complexes (NBu(4))[Pt(PPh(3))(C(6)F(5))(2)(OCOCH(3))] (1) and (NBu(4))(2)[Pt(C(6)F(5))(3)(S)] (S = methanol or acetone) with Tl(I) salts afford the heterometallic neutral cis-[(C(6)F(5))(2)(PPh(3))Pt(&mgr;(2)-OOCCH(3))Tl] (2) and the dimeric dianionic (NBu(4))(2)[{(C(6)F(5))(3)Pt}(2){(&mgr;(2)-O,&mgr;(3)-O'CCH(3))Tl}(2)] (3). Both complexes display Pt-Tl bonds with bond lengths of 2.994(1) Å and 2.