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Curved nanographene with five-, six- and seven-membered rings synthesized in two steps

Nanographenes can be considered molecular fragments of graphene, a 2D conductive material in which carbon atoms are connected in a honeycomb pattern. Because their electronic and photophysical properties vary depending on the size and shape of the molecule, nanographenes are expected to find applications in OLEDs, organic solar cells, organic field-effect transistors and more.

For this, simple methods for synthesizing nanographenes that avoid complex multistep processes are desired. Now, a team of scientists from WPI-ITbM at Nagoya University and RIKEN has established a new two-step annulative π-extension (APEX) method that generates structurally diverse nanographenes. This research is published in the journal Angewandte Chemie International Edition.

New molecular magnet design boosts performance for ultrahigh-density data storage

Researchers at The University of Manchester and the Australian National University have developed a new class of molecular magnets that combines the most successful features of previous designs, resulting in some of the strongest magnetic memory properties reported to date.

The work, published in Nature Communications, centers on single-molecule magnets (SMMs), a class of materials capable of storing magnetic information within individual molecules. These materials are being explored as candidates for future ultrahigh-density data storage technologies, as they offer the potential for information to be stored on a dramatically smaller scale than in conventional magnetic devices.

Controlling the geometry of lanthanide compounds has long been one of the major challenges in molecular magnet design. The researchers have overcome part of that challenge by combining two molecular architectures that had previously delivered strong, but different, magnetic properties.

Tiny molecular rings open new ways for designing better medicines

Cyclopropanes are organic chemistry’s smallest rings. Three carbon atoms are joined in a triangle, creating a compact and unusually strained structure. Despite—or partly because of—this unusual geometry, cyclopropanes are found in many biologically active natural products and have important applications in medicines and drug discovery, from antidepressants to antibiotics and antiviral research.

Connect these carbon triangles to an amine, a functional group with a nitrogen at its center, and you get aminocyclopropanes. They are of particular interest in pharmaceutical research because they can be used to replace another substructure commonly found in drug molecules: α,α-gem-dimethylamines (compounds in which the aminocyclopropane’s triangle is “opened” by disconnecting one edge).

Such molecular substitutes that resemble an existing part of a drug but can alter important properties, such as biological activity and metabolic stability, are referred to as bioisosteres and have shown beneficial effects in countless cases.

Untangling the meta-biomaterial puzzle one property at a time

From repairing damaged tissues to developing better implants, many medical developments depend on materials that can mimic the complex properties of human tissue. Meta-biomaterials are among the most promising candidates. By tailoring their geometry, researchers can create materials with properties similar to those of natural tissues. But there is a catch: Changing one property often changes several others at the same time. TU Delft scientists have now developed a method to decouple these properties.

Their work, published in Nature Communications, helps researchers understand how individual material properties influence cell behavior and could accelerate the development of next-generation biomaterials.

Meta-biomaterials are engineered materials whose properties are determined not by their chemical composition but by their internal architecture. This allows researchers to design structures with carefully tuned mechanical, morphological and mass-transport properties. Such control is particularly valuable in biomedical engineering, where materials need to do more than simply replace damaged tissue. They must also interact with cells and actively support tissue regeneration.

Princeton AI Tames Fusion Plasma Hotter Than the Sun

Princeton’s PACMAN AI can control fusion plasma in milliseconds and predict dangerous instabilities before they start.

In some fusion energy systems, particles can reach temperatures hotter than the center of the Sun. The challenge is keeping that extreme plasma under control, because disturbances can develop within just a few thousandths of a second, much faster than a person could respond.

Researchers at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) and Princeton University have developed a new software framework that uses artificial intelligence (AI) to make those rapid control decisions. The system is designed to respond at machine speed while maintaining strict safety protections and leaving the overall goals in human hands.

Depression in Later Life May Be an Early Warning Sign of Alzheimer’s

Depression in later life may be an early warning from the brain, appearing years before Alzheimer’s begins to affect memory and thinking

A new study in JNeurosci found that faster accumulation of tau, a protein closely tied to Alzheimer’s, was associated with worsening depressive symptoms in older adults who remained cognitively healthy. Teodora Markova of Brandeis University and her colleagues investigated whether changes in mood might track the gradual buildup of tau in the aging brain.

Tau normally helps support the internal structure of neurons. When it becomes abnormal, however, it can collect into tangles that interfere with brain function. These tangles are one of the defining biological features of Alzheimer’s disease, alongside deposits of amyloid beta.

Scientists Uncover New Clues Behind the “Suicide Headache” Mystery

Cluster headache causes extreme pain, but its origins remain unclear. New research links the disorder to genetics, inflammation, and tobacco smoke exposure.

Unlike an ordinary headache, a cluster attack typically erupts without warning and causes excruciating pain around one eye. Episodes can last from 15 minutes to three hours and often return at similar times each day. The severity of the condition has led to its troubling nickname, the “suicide headache.”

Scientists have long suspected that both genes and environmental exposures contribute to cluster headaches. Two studies from Karolinska Institutet in Sweden have now examined those influences from different angles, revealing signs of inflammation, altered gene regulation, and increased exposure to toxic substances.

Physicists Find Useful Energy Hiding in Quantum “Waste Heat”

A new theoretical approach helps connect quantum physics with classical thermodynamics by clarifying what counts as heat and useful work in tiny quantum machines.

When a machine is reduced to a single atom and particles of light, even basic concepts such as heat and useful work become difficult to define. This problem sits at the intersection of thermodynamics and quantum physics, and researchers at the University of Basel in Switzerland have developed a theoretical framework that brings the two descriptions into agreement.

Thermodynamics and quantum physics emerged to explain very different scales of nature. Thermodynamics took shape in the 19th century to describe machines such as steam engines, while quantum physics arose in the early 20th century to explain atoms and subatomic particles. Modern quantum technologies now bring those worlds together because tiny systems built from atoms and light particles (photons) can absorb, transform, and release energy, effectively operating as miniature quantum machines.

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