Synthesis of a magnetic π-extended carbon nanosolenoid with Riemann surfaces.

Riemann surfaces are deformed versions of the complex plane in mathematics. Locally they look like patches of the complex plane, but globally, the topology may deviate from a plane. Nanostructured graphitic carbon materials resembling a Riemann surface with helicoid topology are predicted to have interesting electronic and photonic properties.

Precise membrane separation of nanoparticles using a microporous polymer containing radially π-conjugated molecular carbocycles.

Herein, we report the synthesis of a novel porous polymer, PS2, containing radially π-conjugated carbocycles and a linear phenylene backbone. The -based membrane has a distinct small size cutoff ( 2.6 nm) and a major size at ∼1.

Synthesis and Physical Properties of a Phenanthrene-Based [6,6] Hollow Bilayer Cylindrical Nanoring.

Herein, we report the synthesis and properties of a [6,6] hollow bilayer cylindrical nanoring () from a planar macrocycle via a Diels-Alder and Yamamoto coupling reaction. The fluorescence quantum yield of was determined to be = 52%, which is four times higher than its precursor. In addition, its hollow nanoring configuration was also simulated by theoretical studies, and the tension energy was estimated to be 47.

Synthesis and properties of a nanographene-embedded conjugated macrocyclic nanoring the Scholl reaction.

Direct π-extension by the Scholl reaction for solution-based growth of armchair edges in curved macrocyclic hydrocarbon nanostructures is a great challenge. To date, several attempts at direct π-extension of small highly strained macrocycles have failed. Herein, we report a fixed two-bond approach for direct functionalization of small strained macrocyclic nanorings.

A supramolecular polymeric heterojunction composed of an all-carbon conjugated polymer and fullerenes.

Herein, we design and synthesize a novel all-carbon supramolecular polymer host () containing conjugated macrocycles interconnected by a linear poly(-phenylene) backbone. Applying the supramolecular host and fullerene C as the guest, we successfully construct a supramolecular polymeric heterojunction (⊃C). This carbon structure offers a means to explore the convex-concave π-π interactions between and C.

Synthesis and Photophysical Properties of [3]Cyclo-1,8-pyrenes via [4 + 2] Cycloaddition Reaction.

Herein, we report the synthesis, characterization, and photophysical properties of the crown-like structure of [3]cyclo-1,8-pyrenes (compounds and ). Planar pyrenyl arylene-ethynylene macrocycles are used as the precursors to synthesize these pyrene-based cycloarenes by [4 + 2] cycloaddition reaction with good yields. These molecules are confirmed by nuclear magnetic resonance spectroscopy and high-resolution mass spectrometry.

The Supramolecular Chemistry of Cycloparaphenylenes and Their Analogs.

Cycloparaphenylenes (CPPs) and their analogs have recently attracted much attention due to their aesthetical structures and optoelectronic properties with radial π-conjugation systems. The past 10 years have witnessed a remarkable advancement in CPPs research, from synthetic methodology to optoelectronic investigations. In this present minireview, we highlight the supramolecular chemistry of CPPs and their analogs, mainly focusing on the size-selective encapsulation of fullerenes, endohedral metallofullerenes, and small molecules by these hoop-shaped macrocycles.

From Planar Macrocycle to Cylindrical Molecule: Synthesis and Properties of a Phenanthrene-Based Coronal Nanohoop as a Segment of [6,6]Carbon Nanotube.

Herein, we explore phenanthrene as the building block to synthesize a hoop-shaped [6,6]carbon nanotube segment from a planar macocycle via a Diels-Alder reaction. The phenanthrene-based coronal nanohoop was fully characterized by HR-MS, NMR, and other spectroscopies. In addition, its photophysical properties and the supramolecular interactions between and fullerene C were investigated.