Novel nitrogen-bridged diazocines (triazocines) were synthesized that carry a formyl or an acetyl group at the CH 2 NR-bridge and bromo- iodo-substituents distant phenyl ring. The photophysical properties investigated in acetonitrile water. As compared to previous approaches yields of intramolecular azo cyclizations increased (from ≈40 60%) using oxidative approach starting from corresponding a...

2-Borylated porphyrins reacted with Pt(cod)Cl2 to give b-to-b platinum-bridged porphyrin dimers, which were converted to b-to-b directly linked porphyrin dimers through triphenylphosphine-mediated reductive elimination. Similar reactions of 2,18-diborylated Ni(II)–porphyrin and Zn(II)–porphyrin gave the corresponding doubly b-to-b platinum-bridged porphyrin dimers. Treatment of the doubly b-to-...

Two ethylene-bridged methylaluminium amidinates and one aluminium amidinate containing three terminal trimethylstannyl-ethynyl groups interconnected by π-coordinated potassium ions were prepared in situ. The re-oxidation of the ethylene-bridged compound by iodine followed by further reduction using the same activation procedure demonstrated the versatility of the approach. The reactivity of an ...

A new class of systems of strongly singular integrodifferential equations is examined, which emerges in the study of the bridged interface crack growth, e.g., in fiber stitched layered composites. This work generalizes the asymptotic analysis of strongly singular integral equations by Willis and Nemat-Nasser [Quart. Appl. Math., 48 (1990), pp. 741–753]. Singular perturbation solutions up to the...

Results: Approximately 80% of patients had AWR with component separation and 8% had a bridged repair. The most frequently used mesh was porcine (Strattice, 56.5%), followed by bovine (Surgimend, 31.1%) and human (Alloderm, 10.9%). There were 31 (16.2%) hernia recurrences with a surgical site occurrence rate of 25.1%. Among these patients, 13% had hernia recurrence within 3 years, while 16.7% at...

Size exclusion chromatography and centrifugation separation protocols were developed and compared for isolating enriched fractions of phenylethynyl-bridged metal nanoparticle dimers and trimers from the monomeric particle starting material. Both methods enabled the isolation of enriched fractions of a desired array without causing significant sample aggregation or replacement of the phenylethyn...

Dicopper species have been identified as the active sites in converting methane to methanol in Cu-zeolites. To understand the formation of these copper cores in mordenite, we used in situ time-resolved X-ray absorption spectroscopy during heat treatment. Significant dehydration enabled the reduction of the copper cores, after which molecular oxygen was cleaved. The activated oxygen bridged two ...