In the title mol-ecule, C(18)H(18)F(2)N(2)O(2)S, the two benzene rings, which are oriented in opposite directions with respect to the rigid 2,5-diaza-bicyclo-[2.2.1]heptane core, form a dihedral angle of 17.2 (1)°. Weak inter-molecular C-H⋯O, C-H⋯F and C-H⋯N contacts consolidate the crystal packing.

Acenaphtho[1,2-k]fluoranthene derivatives DPAF-n as new building blocks for one-dimensional (1D) structure assembly have been developed and employed to fabricate luminescent twisted nano/micro-wires; and the DPAF rigid core attached via flexible alkyl chains with suitable lengths is critical for the formation of twisted architectures.

Two new truxene-based 3-dimensional (3-D) molecules self-assembled in cyclohexane to give organogels with vesicular and fibrillar nano-morphologies governed by the substitution pattern of the peripheral alkyl amido side-chains grafted onto the rigid 3-D core.

Herein we report the syntheses of two porous hyper-crosslinked polymers (HCPs) via thiol-yne reaction with rigid tetrahedral and pseudo-octahedral core structures. Sorption measurements with nitrogen gas at 77 K revealed BET-surface areas up to 650 m²/g. Those networks also showed a high thermal stability as well as insolubility in common organic solvents.

Background Mutations in proteins can have deleterious effects on a protein’s stability and function, which ultimately causes particular diseases. Genetically inherited muscular dystrophies include several genetic diseases, which cause increasing weakness in muscles and disability to perform muscular functions progressively. Different neuro-muscular diseases are caused by different types of muta...

High birefringence and low viscosity isothiocyanate liquid crystal single compounds, and eutectic mixtures based solely on unsaturated rigid core structures, are reported. Extraordinarily high values of figure-of-merit were observed at room temperature for the formulated nematic mixtures. Potential applications of such mixtures for laser beam steering at l51.55mm using optical phased arrays are...

Attachment of a flexible coil on the mid-part of a rigid rod block generates T-shaped rod-coil block molecules that self-assemble into a stepped column. These layers, in turn, self-curve into a spiral column with tunable core structure in the solid state.

We report construction of monodisperse PAMAM-type dendrimers based on a dodecahydroxy closo-dodecaborane scaffold. The ideal sphericity and high functional group density of the icosahedral core permits ready access to hybrid dendrimers (dendritic closomers) having rigid, uniformly shaped exterior surfaces.

The purpose of this research was to evaluate the nonlinear dynamic response of rigid and semi-rigid steel frames under Far-Fault Earthquake Records. Accordingly, the fragility curve of the moment frames with rigid and semi-rigid connections was determined. Considering the analytical knowledge of structures in the past, the analysis and design of steel frames based on the assumptions of rigid or...