Chemistry

550 cards. Each one is a 40-second story with a five-minute read behind it. Page 8 of 10.

421. How a refugee chemist revolutionized birth control and mastered the game of bridgeGeorge Rosenkranz fled Nazi-era Europe to build a pharmaceutical empire in Mexico. By reverse-engineering complex steroid production, he helped develop the first oral contraceptiv…
422. Why the path of a chemical reaction does not change its total energyGermain Henri Hess discovered that the energy released in a chemical reaction remains constant, regardless of the steps taken to reach the final state. This principle, known as He…
423. How Henri Moissan Tamed the Most Dangerous Element in the Periodic TableFluorine is the most reactive element in existence, a chemical terror that defied scientists for over 150 years. In 1886, French chemist Henri Moissan finally isolated the elusive…
424. How Henry Taube Discovered Molecules Build Bridges Instead of Just Swapping ElectronsFor decades, chemists assumed molecules simply exchanged electrons during reactions. Henry Taube proved otherwise. By identifying a hidden chemical bridge, he transformed our unde…
425. Hermann Staudinger proved that polymers are long chains, not just clusters of small molecules.For years, the scientific establishment mocked the idea that large molecules existed. They insisted that substances like rubber were merely loose aggregates of tiny particles. Her…
426. How Jean-Marie Lehn engineered molecular cages to mimic the intelligence of biological systemsJean-Marie Lehn revolutionized chemistry by designing molecules that can recognize one another. By creating synthetic cages that selectively trap specific guests, he pioneered sup…
427. How a Nobel-winning chemist pivoted from infrared light to scanning tunneling microscopyJohn Polanyi, a Nobel laureate in chemistry, spent decades mastering the mechanics of chemical reactions. After winning the 1986 prize for his work in infrared chemiluminescence, …
428. How a Scottish chemist redefined heat and changed the future of steam powerJoseph Black was a titan of the Scottish Enlightenment whose precise experiments transformed chemistry into a quantitative science. By distinguishing between heat and temperature …
429. How a pacifist crystallographer settled the long-standing debate over the shape of benzene.Kathleen Lonsdale was a trailblazing scientist who proved the benzene ring is flat, shattering chemical assumptions in 1929. Beyond her laboratory breakthroughs, she was a committ…
430. How a childhood chemistry set led to the discovery of the Antarctic ozone holeMario Molina was a Mexican physical chemist who transformed environmental science by identifying how common refrigerants were destroying the Earth's protective ozone layer. His wo…
431. How a nineteenth-century physician transformed the courtroom by turning poison into visible evidence.Before Mathieu Orfila, proving murder by poison was a guessing game. By pioneering the study of how toxins accumulate in specific organs, Orfila moved toxicology from speculation …
432. The 16th-century alchemist who identified oxygen 170 years before modern scienceLong before oxygen was officially discovered, Michael Sendivogius identified a life-giving substance in the air. This Polish alchemist, a fixture at the courts of Emperor Rudolf I…
433. How Paul Flory transformed our understanding of the complex world of long-chain moleculesPaul Flory was a Nobel laureate whose work redefined polymer science. By applying statistical mechanics to macromolecules, he moved beyond simple assumptions to explain how polyme…
434. How a Swedish polymath reshaped the periodic table and pioneered modern oceanographyPer Teodor Cleve was a master of the elements who discovered holmium and thulium while untangling the complex chemistry of rare earths. Yet his intellectual curiosity extended far…
435. How a chemist turned soybean oil into life-saving medicine and industry-changing breakthroughsPercy Lavon Julian overcame systemic racism to become a titan of industrial chemistry. By mastering the synthesis of plant sterols, he slashed the costs of essential hormones and …
436. How Robert Mulliken redefined the chemical bond by looking at the whole moleculeBefore Robert Mulliken, chemists viewed bonds as localized links between atom pairs. Mulliken challenged this, proposing that electrons instead occupy states spanning an entire mo…
437. How a failed experiment led a French chemist to a Nobel Prize-winning discoveryVictor Grignard transformed organic chemistry by solving a stubborn problem in synthesis. By replacing zinc with magnesium in a stalled reaction, he unlocked a reliable way to for…
438. Walther Nernst: The Nobel-winning chemist who pioneered electric cars and electronic pianos.Walther Nernst was a titan of thermodynamics, but his restless mind spanned far beyond the laboratory. From inventing early electric lighting and pioneering chain reaction theory …
439. How a Manhattan Project chemist invented the nuclear clock that transformed our understanding of historyWillard Libby’s work on uranium enrichment during World War II led him to a breakthrough that changed archaeology forever. By realizing that carbon-14 acts as a natural timer in o…
440. How a Victorian chemist’s quest for safety accidentally birthed the modern sunglasses industrySir William Crookes was a brilliant physicist who discovered thallium and pioneered plasma research. Yet, his most enduring legacy might be the specialized glass he developed to p…
441. The brilliant polymath whose missing notebooks obscured his place in scientific historyWilliam Hyde Wollaston was a titan of 19th-century science, discovering palladium and rhodium while pioneering spectroscopy and electrochemistry. Yet, he remains overshadowed by h…
442. How a Scottish chemist discovered an entire missing group of the periodic tableSir William Ramsay transformed our understanding of the atmosphere by isolating a series of inert gases that had previously eluded detection. His rigorous pursuit of these elusive…
443. Chiral metal-organic frameworks offer tunable properties for specialized chemical applicationsResearchers have identified that chiral metal-organic frameworks (CMOFs) provide unique functional properties that traditional porous materials like silica or activated carbon can…
444. Designing chiral catalysts to control complex light-driven chemical reactionsResearchers exploring asymmetric catalysis found that creating precise, light-driven chemical reactions requires specialized catalyst architectures. While many methods for stereoc…
445. Porous metal-organic frameworks show promise for capturing and converting atmospheric carbon dioxideResearchers have identified metal-organic frameworks (MOFs) as a versatile class of materials for addressing rising atmospheric CO2 levels. These highly porous structures can be c…
446. Visible light photocatalysis offers milder conditions and new pathways for chemical synthesisA review of modern organic chemistry found that visible-light photocatalysis has become a versatile tool for creating complex molecules. By using catalysts that absorb light to sh…
447. A free web tool predicts chemical toxicity across 61 different endpointsResearchers built ProTox 3.0, a free webserver that uses machine learning and molecular similarity to estimate how toxic a chemical might be. Given only a compound's two-dimension…
448. Most aromatic rings in metal complexes prefer slipped rather than face-to-face stackingA geometric analysis of metal complexes with aromatic nitrogen-containing ligands revealed that perfect face-to-face π–π stacking is actually quite rare. Instead, researchers foun…
449. Piezoelectric effect boosts photocatalytic hydrogen production in MOFsResearchers comparing two nearly identical metal-organic frameworks, UiO-66-NH2 built from zirconium or hafnium, found that under combined light and ultrasonic irradiation, the ha…
450. Metal-organic frameworks offer a versatile new blueprint for efficient industrial separationsResearchers are increasingly looking to metal-organic frameworks (MOFs) as a high-performance solution for separating gases and liquids. These highly porous, crystalline materials…
451. The evolution of reticular chemistry from simple pores to complex structural designA review of twenty-five years of reticular chemistry shows that the field has moved far beyond simply creating highly porous materials. While the initial interest in metal-organic…
452. How triplet energy transfer can drive the creation of chiral moleculesA review of photochemical research shows that scientists can use triplet energy transfer to drive enantioselective reactions. By using a sensitizer to transfer energy to a substra…
453. New strategies for building chemically stable metal-organic frameworks expand their practical usesResearchers reviewing a decade of progress in metal-organic frameworks (MOFs) found that specific chemical design strategies can overcome the inherent instability of these materia…
454. Combining graphene with metal-organic frameworks creates versatile materials for energy and waterResearchers have identified a promising way to overcome the limitations of metal-organic frameworks (MOFs) by combining them with graphene. While MOFs are excellent porous materia…
455. Light-activated catalysts enable precise chemical bonds through radical intermediatesA review of chemical research highlights how visible light can be used to trigger radical coupling reactions. By using photoredox agents—specifically ruthenium, iridium, and vario…
456. New catalytic methods expand the ways chemists create complex moleculesA comprehensive review of chemical research over the last 20 years found a massive surge in new methods for enantioselective radical reactions. By using chiral catalysts—ranging f…
457. The diverse origins of light emission in metal-organic frameworksA comprehensive review of metal-organic frameworks (MOFs) found that their ability to emit light stems from a complex variety of structural features. Researchers surveyed the exis…
458. Customizing the architecture of porous materials through precise organic linker designResearchers have identified that the unique properties of metal-organic frameworks (MOFs)—highly porous materials used for storage and catalysis—can be precisely engineered by mod…
459. The complex chemistry of lipid oxidation impacts meat quality and safetyResearchers reviewing the chemistry of meat products found that lipid oxidation is a primary driver of food spoilage. While meat provides essential nutrients like vitamins and fat…
460. Zirconium-based frameworks emerge as highly stable materials for industrial and medical useResearchers have identified zirconium-based metal–organic frameworks (Zr-MOFs) as a leading class of materials for practical technology. These structures are notable for their div…
461. Combining metal-organic frameworks with other materials creates powerful new multifunctional compositesA review of recent advances in chemistry found that integrating metal-organic frameworks (MOFs) with other functional materials can create new composites. These hybrid materials e…
462. Metal compounds emerge as a potential new tool against resistant bacteriaA review of chemistry research describes metal ions, nanoparticles and metal complexes—dubbed 'metalloantibiotics'—as a growing area of study for fighting bacterial infections. Th…
463. How scientists design porous frameworks for energy and medicineA review of metal-organic frameworks (MOFs) highlights how these highly porous, crystalline structures are built by bonding metal ions with organic linkers. Researchers found that…
464. Choosing the right analytical tools to measure food freshness and stabilityResearchers have compiled a comprehensive overview of how scientists measure lipid oxidation—the process that causes fats in food to spoil—and the effectiveness of antioxidants. T…
465. Researchers trace how water molecules assemble inside specialized porous crystalsResearchers studying the water-harvesting material MOF-303 found that water does not simply flood into pores. By using X-ray diffraction and computer simulations, the team observe…
466. The versatile potential of two-dimensional metal-organic frameworks in modern technologyA review of metal-organic frameworks found that two-dimensional (2D) compounds, also known as layered coordination polymers, possess highly tunable structures and modular natures.…
467. A new guide for interpreting chemical bonds in organic materials using FTIR spectroscopyResearchers have developed a step-by-step method to help scientists read and assess chemical bonds and structures in organic materials. By analyzing FTIR spectroscopy peaks, the s…
468. Three key criteria for designing materials that capture water from the airResearchers studying 23 different porous materials, including 20 metal-organic frameworks, identified three essential criteria for effective water adsorption. By evaluating conden…
469. Optimizing zeolite adsorption could improve industrial sustainability and energy savingsA review of zeolite technology highlights how these versatile materials are central to modern separation processes. Researchers found that replacing current industrial separation …
470. Copper nanoparticles offer versatile potential for advancing modern chemical catalysisA comprehensive review of copper and copper-based nanoparticles found that these earth-abundant, inexpensive materials are driving significant interest in the field of catalysis. …
471. Metal-organic frameworks offer a versatile way to capture hazardous iodine residuesResearchers have identified metal-organic frameworks (MOFs) as highly promising materials for capturing and sequestering iodine. Because iodine has a short half-life and poses sig…
472. A journey through the rarest and most radioactive elementsFilmed at the Oak Ridge National Laboratory in Tennessee, this video showcases a collection of incredibly rare and radioactive isotopes, ranging from Uranium to Polonium.
473. Why a simple kitchen staple becomes a dangerous explosive when dispersed in airCorn flour is usually harmless, but when blown through a funnel, it creates a dramatic fireball. This video explores the science of reaction rates and why increasing surface area …
474. Why dry cleaning once relied on highly flammable gasoline and keroseneDry cleaning was not always a safe process. This video explores the evolution of garment cleaning, tracing the shift from dangerous, flammable solvents like kerosene and gasoline …
475. What is the chemical formula for a human being?If you distilled a human body into a single molecule, what would it look like? This video investigates the specific elements required for life and explains why our biological chem…
476. Six chemical reactions that fundamentally altered the course of human historyChemistry is not just a laboratory pursuit; it is the silent engine behind human progress. This video examines six life-altering chemical reactions that have shaped everything fro…
477. The chemistry behind the glow of living lightExplore the fascinating world of bioluminescence, from the rhythmic blinking of summer fireflies to the glowing predators of the deep sea.
478. The 2025 Nobel Prize in Chemistry honors the architects of metal–organic frameworks.This video explores the breakthrough in chemical structures known as metal–organic frameworks. Experts from the Periodic Videos team discuss the significance of this year's Nobel-…
479. What would the chemical structure of Dune's mythical Spice Melange actually look like?Periodic Videos examines a proposed chemical structure for the legendary Spice Melange from Frank Herbert's Dune universe. This exploration breaks down the fictional substance thr…
480. Who are the faces behind the Periodic Videos experiments?Ever wondered about the people conducting the chemistry demonstrations in our series? This video introduces the scientists and contributors who bring over 300 elemental videos to …

All of Science Open the feed Latest A–Z