Ground State and Resonances in the Standard Model of the Non-Relativistic QED

We prove existence of a ground state and resonances in the standard model of the non-relativistic quantum electro-dynamics (QED). To this end we introduce a new canonical transformation of QED Hamiltonians and use the spectral renormalization group technique with a new choice of Banach spaces.     

Two-point contact chiral distinction--a theoretical appraisal

Ab initio calculations reveal chiral distinction in two-point contact CHFCIBr dimers, with chiral distinction energy of 1.5 kJ mol-1 between the SR and SS dimers fully optimized at the MP2/6-311++G** level.     

Crystal engineering of metalloporphyrin assemblies. New supramolecular architectures mediated by bipyridyl ligands

Targeted synthesis of new supramolecular motifs of metalloporphyrins in crystals by a concerted mechanism of molecular recognition in three dimensions, aided by organic ligands, is presented; it involves induced assembly of [tetrakis(4-hydroxyphenyl)porphyrinato]zinc species by a combination of axial coordination through bridging bipyridyls and of lateral hydrogen bonding.     

Preferred electron-impact elimination of two CHO groups from A triapentafulvalenequinone. Formation of a triafulvalene radical cation?

The mass spectral fragmentations of 1,2-diphenyl- and 1,2-di (phenyl-d₅)-4,5-benzotriapentafulvalene-3,6-quinone indicate the preferred elimination of two CHO groups with the formation of triafulvalene radical cations.     

Microprocessor ratemeter for kinetic determinations

A simple, compact, easy-to-implement microprocessor ratemeter for kinetic determinations based on initial rate, fixed time, and variable time is presented. The hardware and software are such that the ratemeter can be used with almost any transducer or instrument to monitor reactions in a wide variety of chemical systems. The performance of the ratemeter is demonstrated by its application to the determination of phosphorus by stoppedflow spectrometry, glucose by amperometry, and alkaline phosphatase activity in control sera by visible spectrophotometry.     

1H and 13C n.m.r. study of butatriene-bis-tricarbonyliron complexes. Assignment of geometric orientation by comparative J(CCCH) values

A number of substituted butatriene-bis-tricarbonyliron complexes have been studied by ¹³C and ¹H n.m.r. spectroscopy. Long range coupling values, J(CCCH), have confirmed chemical shift results that methyl and phenyl groups assume opposite orientations at the coordinated double bonds with the methyl group preferentially trans to carbon and the phenyl group preferentially trans to iron.