Multidentate Schiff base ligands derived from a selection of biphenyl- and terphenyl polyamines were synthesized, their reactivity towards divalent (Ni, Cu, Zn, Cd) trivalent (Co, Y, Lu) metals was studied by single-crystal X-ray diffraction analysis, NMR spectroscopy, UV/Vis spectroscopy for the Cu(II) complexes. Large variations in resulting complexes observed based on relative position amine...

High-quality pentacene-doped p-terphenyl bulk crystals were grown by the selective self-seeding vertical Bridgman technique (SSVBT). The lattice structure and crystal properties of samples different doping concentrations their relations with single tested analyzed. effects pentacene at in molecular are discussed. powder X-ray diffraction, FTIR, 1H NMR studies show that no additional peaks (exce...

Overexpression or hyperactivation of MDM2 contributes to functional inactivation of wild-type p53 in nearly 50% of tumors. Inhibition of p53 by MDM2 depends on binding between an NH(2)-terminal (residues 16-28) p53 alpha-helical peptide and a hydrophobic pocket on MDM2, presenting an attractive target for development of inhibitors against tumors expressing wild-type p53. Here we report that nov...

We report on the fabrication of a molecular transistor based on a single molecule trapped in a few-layer graphene nanogap. The device is pre-patterned with He-ion beam milling or oxygen plasma etching prior to nanogap formation. Pre-patterning helps to localize the gap, and to make it narrower, so that only a few or a single molecule can be trapped in it. The nanogap is formed by an electroburn...

London dispersion force is ubiquitous in nature, and is increasingly recognized to be an important factor in a variety of surface processes. Here we demonstrate unambiguously the decisive role of London dispersion force in non-equilibrium growth of ordered nanostructures on metal substrates using aromatic source molecules. Our first-principles based multi-scale modeling shows that a drastic red...

Recently, the world's first room-temperature maser was demonstrated. The maser consisted of a sapphire ring housing a crystal of pentacene-doped p-terphenyl, pumped by a pulsed rhodamine-dye laser. Stimulated emission of microwaves was aided by the high quality factor and small magnetic mode volume of the maser cavity yet the peak optical pumping power was 1.4 kW. Here we report dramatic miniat...

The Pd-complex-catalyzed polymerization of 2,7-dibromo-9,9-dihexylfluorene, 2,5-dibromo-3-hexylthiophene, and 1,4-dibromo-2,5-dioctyloxybenzene with 3,5-diethynyl-4-methoxy[1,1';4',1'']terphenyl afforded poly(aryleneethynylene)s (PAEs), Polymer-1, Polymer-2, and Polymer-3, respectively; the Pd-complexcatalyzed polymerization of the same with 1,3-diethynylbenzene afforded PAEs, Polymer-4, Polyme...

White emission with two sharp strong peaks - a molecular emission peak at 455 nm and an excimer emission peak at 591 nm - was obtained by introducing a terphenyl group into a highly twisted core chromophore, which promoted a molecular orientation in the film state suitable for excimer formation.