Conformational Landscapes and Energetics of Carbon Nanohoops and their Ring-in-Ring Complexes.

Carbon nanohoops are promising precursors for the synthesis of nanotubes, whose structural dynamics are not well understood. Here, we investigate the conformational landscape and energetics of cycloparaphenylenes (CPPs), a methylene-bridged CPP and a carbon nanobelt. These nanohoops can form host-guest complexes with other rings, and understanding their structure is crucial for predicting their properties and identifying potential applications.

[Comfort Terminal Care in the intensive care unit: recommendations for practice].

Background And Objective: The Working Group on Ethics in Anesthesia and Intensive Care Medicine of the Austrian Society for Anesthesiology Resuscitation and Intensive Care Medicine (ÖGARI) already developed documentation tools for the adaption of therapeutic goals 10 years ago. Since then the practical implementation of Comfort Terminal Care in the daily routine in particular has raised numerous questions, which are discussed in this follow-up paper and answered in an evidence-based manner whenever possible.

Results: The practical implementation of pain therapy and reduction of anxiety, stress and respiratory distress that are indicated in the context of Comfort Terminal Care are described in more detail.

New Insights into Ring-In-Ring Complexes of []Cycloparaphenylenes including the [12]Carbon Nanobelt.

The supramolecular chemistry of cycloparaphenylenes (CPPs) is characterized by the ability of the ring system to undergo both concave and convex π-π interactions. As a consequence, ring-in-ring complexes can be formed in which the CPP serves as the host as well as the guest molecule ([ + ]CPP⊃[]CPP). In this work, host-guest ring-in-ring complexes of []CPPs ( = 5-12) are investigated by means of electrospray ionization-tandem mass spectrometry (ESI-MS) and laser desorption ionization mass spectrometry (LDI-MS).

Experimental and Theoretical Structure Elucidation of the [2 : 1] Complex Ion of Carbo[n]helicene with n=6, 7 and 8 and Ag.

The front cover artwork illustrates the competition of [6]-, [7]- and [8]helicene for attaining a silver(I) cation. This struggle takes place in the electrospray process during solvent evaporation, leading to the well-known tweezer-like surrounding of Ag by the helicene in the [1:1] complex. In this competition, the larger helicenes outperform the smaller ones.