Molecules are never truly still. Even in apparently stable matter, atoms vibrate continuously, stretching and bending the chemical bonds that hold them together. These vibrations are not random noise: they determine how molecules absorb light, exchange energy, and undergo chemical reactions. One of the central challenges in chemistry is learning how to direct energy into […]
Light can do more than illuminate matter. In some metal complexes, it can break chemical bonds in a highly controlled way, releasing specific molecules only when and where light is applied. This idea lies behind photoactivated chemotherapy, a strategy in which relatively inactive compounds become chemically reactive after irradiation. Ruthenium complexes are among the most […]
Pressure is usually imagined as a force that simply squeezes matter into a smaller space. At the molecular level, however, the story is more subtle. A recent computational chemistry study explored how pressure changes the shapes of molecules and the fleeting structures known as transition states, which appear briefly as reactions occur. The work focused […]
Nanogels are among the most interesting examples of how chemists can build useful structures by working at the scale of single molecules. They are tiny soft particles made from polymers, long chain-like molecules, that are linked together into small three-dimensional networks. Because they can hold water and trap other molecules inside, nanogels are especially attractive […]
Chemistry • DIPC Biochemistry • Evolution • Geosciences • Materials
The classic chemical garden experiment is a staple of introductory chemistry, where colorful, plant-like structures sprout from metal salt crystals dropped into a solution of sodium silicate. While these vibrant tubes look like biological life, they are entirely inorganic, driven by the physics of osmosis and the chemistry of precipitation. For decades, scientists have admired […]
Author: Jordi Diaz Marcos, CCiTUB , Universitat de Barcelona As good citizens, we diligently fill the recycling bins provided by our local authorities with all manner of plastic trays, boxes, bottles and bags. But as these bins fill up quicker and quicker each week, an awkward question arises: is all this effort actually doing any […]
Imagine cooling a liquid so fast it turns into glass: a solid that’s jumbled inside, unlike neat crystal lattices. In 1948, Walter Kauzmann noticed a puzzle. As liquids cool, their entropy (a measure of disorder) drops faster than in crystals. Below a certain temperature, a supercooled liquid would have less entropy than the crystal, implying […]
Traditional chemistry textbooks present a tidy picture: Atoms in molecules occupy fixed positions, connected by rigid rods. A molecule such as formic acid (methanoic acid, HCOOH) is imagined as two-dimensional—flat as a sheet of paper. But quantum physics tells a different story. In reality, nature resists rigidity and forces even the simplest structures into the […]
Authors: Crisbel Cardenas 1, Eduardo Torre-Pascual 1,2 , Maite de Blas 1,2 , Estíbaliz Sáez de Cámara 1,2, Erlantz Lizundia 1,3 & Ion Agirre-Arisketa 1,2 1 Repsol Foundation Classroom on Energy Transition & Circular Economy. Bilbao School of Engineering. University of the Basque Country (UPV/EHU). Bilbao. España 2 Chemical and Environmental Engineering Department. Bilbao School […]
In the world of organic chemistry, some rules are taught as absolute boundaries. One of the most famous is Bredt’s rule, a guideline that has dictated the limits of molecular architecture for nearly a century. This rule essentially places a “keep off the grass” sign on certain parts of a molecule, specifically forbidding the formation […]