Ditopic binding of various dinitrogen compounds to three bisporphyrin molecular tweezers with spacers of varying conformational rigidity, incorporating the planar enediyne (1), the helical stiff stilbene (2), or the semi-rigid glycoluril motif fused to the porphyrins (3), are compared. Binding constants Ka = 10⁴-10⁶ M(-1) reveal subtle differences between these tweezers, that are discussed in t...

Cosmic dust plays a dominant role in the universe, especially formation of stars and planetary systems. Furthermore, surface cosmic grains is bench-work where molecular hydrogen simple organic compounds are formed. We manipulate individual particles water solution by contactless non-invasive techniques such as standard Raman tweezers, to characterize their response mechanical effects light (opt...

Single molecule force spectroscopy methods, such as optical and magnetic tweezers and atomic force microscopy, have opened up the possibility to study biological processes regulated by force, dynamics of structural conformations of proteins and nucleic acids, and load-dependent kinetics of molecular interactions. Among the various tools available today, optical tweezers have recently seen great...

• New tools for chiral voltammetry in ionic liquid media: molecular “tweezers” Tweezer chirality from isomannide/isosorbide cores derived pool arm design enables modulating redox properties and coordination modes Tweezers can be liquids or/and additives achiral Successful enantiodiscrimination CV tests with tweezer Ionic (ILs), either themselves (CILs) or modified small quantities of CILs relat...

A molecular system of a nanometer-sized reel was developed from F(1)-ATPase, a rotary motor protein. By combination with magnetic tweezers and optical tweezers, single-molecule double-stranded DNA (dsDNA) was wound around the molecular reel. The bending stiffness of dsDNA was determined from the winding tension (0.9-6.0 pN) and the diameter of the wound loop (21.4-8.5 nm). Our results were in g...