We used temperature programmed reaction spectroscopy (TPRS) and molecular beam reflectivity measurements to investigate the initial dissociation of n-butane isotopologues on PdO(101) and determine kinetic parameters governing the selectivity of initial C-H(D) bond cleavage. We observe differences in the reactivity of the n-butane isotopologues on PdO(101) due to kinetic isotope effects, and fin...

Batch kinetic and inhibition studies were performed for the aerobic cometabolism of 1,1,1-trichloroethane (1,1,1-TCA), 1,1-dichloroethylene (1,1-DCE), and 1,1-dichloroethane (1,1-DCA) by a butane-grown mixed culture. These chlorinated aliphatic hydrocarbons (CAHs) are often found together as cocontaminants in groundwater. The maximum degradation rates (k(max)) and half-saturation coefficients (...

One of the greatest challenges in 2D self-assembly at interfaces is the ability to grow spatially controlled supramolecular motifs in the third dimension, exploiting the surface as a template. In this manuscript a concentration-dependent study by scanning tunneling microscopy at the solid-liquid interface, corroborated by Molecular Dynamics (MD) simulations, reveals the controlled generation of...

In the Jager group, a series of bichromophoric light-harvesting antenna systems has been synthesized in a modular fashion by covalent attachment of blue light-absorbing naphthalene monoimide energy donors to green light-absorbing perylene3,4,9,10-tetracarboxylic acid energy acceptors. Quantitative and ultrafast (ca. 1 ps) intramolecular excitation energy transfer (EET) from the donor to the acc...

In this study, a novel three-component hydrogel has been designed and fabricated via hierarchical self-assembly by amino acid derivative (N,N′-diphenylalanine-3,4,9,10-tetracarboxylic diimide (NPPD)), riboflavin (RF) and α-cyclodextrin (α-CD). These molecules were aggregated to form some fibrous structures based on hydrogen bond and π–π stacking. The results show that the hydrogel has a specifi...

A ndreas Krause, Helm ut Lackner* Institut für Organische Chemie der Universität Göttingen, Tammannstraße 2, D-37077 Göttingen Z. Naturforsch. 53 b, 1043-1050 (1998); eingegangen am 22. Juni 1998 Antibiotics, Octacidomycins, Oligocarboxylic Acids, Synthesis, NMR Data Following a new strategy, an improved total synthesis of the unique antibiotic octacidomycin (1) and of structurally related olig...

Three novel gold nanoparticle (AuNPs) composites protected by perylene bisimide derivatives have been designed and synthesized. Thanks to the rational molecular design, AuNPs capped by N,N'-2,6-bis(4-aminomethylpyridine)-1,6,7,13-tert-[4-(hydroxymethyl)phenoxy-5-(1,2-dithiolan-3-yl)pentanoate]-3,4,9,10- tetracarboxylic acid bisimide (8SP-AuNPs) exhibited unusual enhancement in fluorescence inte...

Conventional photoredox catalytic additions of alcohols to olefins require additives, like thiophenol, promote back electron transfer. The concept “photozymes” assumes that forward and backward transfer steps in a cycle are controllable by substrate binding photocatalytically active peptides. Accordingly, we synthesized short tripeptide modified with 1,7-dicyano-perylene-3,4 : 9,10-tetracarboxy...

Two novel ethylene-assimilating bacteria, strains ETY-M and ETY-NAG, were isolated from seawater around Japan. The characteristics of both strains were investigated, and phylogenetic analyses of their 16S rRNA gene sequences showed that they belonged to the genus Haliea. In C1-4 gaseous hydrocarbons, both strains grew only on ethylene, but degraded ethane, propylene, and propane in addition to ...