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11+ hour, 1+ min ago (84+ words) Chemistry in Pictures: Predicting a polymer palette Showcasing the beauty of chemistry, chemical engineering, and related sciences. See more Chemistry in Pictures. Brianna Barbu is a physical sciences reporter at C&EN. Chemistry matters. Join us to get the news you need. Get More Get More An editor's selection of the C&EN stories that will continue to spark conversations in the week ahead C&EN empowers those in and around the global chemical enterprise The Edge in Chemistry News Your email has been sent to...

11+ hour, 56+ min ago (312+ words) Chemists can now precisely control the stereochemical sequence of synthetic polymers using similar techniques to those used to create artificial DNA. Growing polymers one monomer at a time could unlock "out of the box" sequences with unique properties, say researchers. Lutz and Ranajit Barman have now developed a synthetic method that can create polymers with complete control over the order of monomers, allowing for the relative order of stereocentres to be precisely managed. The team first synthesised two chiral phosphodiester amide monomers with opposite configuration, which were then used in iterations of solid phase phosphoramidite chemistry to build the polymers stepwise, similar to how artificial DNA and RNA is made. Nature can produce a range of complex biopolymers with stereocentres (left) but synthetic polymer efforts (middle) are still limited. Lutz and Barman"s new technique should significantly open up the…...

16+ hour, 41+ min ago (852+ words) An abusive lab member made my dream course a nightmare. By speaking up, I'm reclaiming my joy When I became fascinated with chemistry at school, in grade 10, what I really loved were the lab experiments and titrations. They were so fun. I wanted to learn more, do more reactions. Honestly, I just wished I could stay in the lab forever. Little did I know that the place where I found so much joy would become the stage for some of my hardest battles. I ended up scoring the highest in chemistry in 12th grade. But my father wanted me to become a doctor, so I had to prepare for medical entrance exams. I wasn't passionate about medicine, but I kept pushing myself for my dad. The entrance exam had biology, physics and chemistry. And guess what kept me motivated through it…...

3+ day, 14+ hour ago (1162+ words) Check the table below to know the marking scheme of Chemistry subject in JEE Main 2026: Total Questions in Section Questions to be Attempted Multiple Choice Questions (MCQs) 5 (Any 5 to be attempted) JEE Main 2026: Is 75% Rule Applicable This Year? NTA Clarifies the Criteria JEE Main 2026: Best 60 Days Preparation Plan to Score 99 Percentile SECTION A: Multiple Choice Questions: This section contains 20 multiple choice questions. Each question has 4 choices (1), (2), (3) and (4), out of which ONLY ONE is correct. Polymer which is named as Orlon is" Which of the following have square pyramidal structure" We are given with a reaction Which of the following statements is correct?" (1) This reaction can also take place in acetic acid" (2) This reaction is called Swarts reaction" (3) This reaction shifts in forward direction using principle of Le-Chatelier's principle" (4) This reaction will take place even if Br is replaced with F. Which of…...

4+ day, 11+ hour ago (270+ words) With most of the government's commitments to research announced already, the autumn budget contained little new on this front, but it did announce several decisions that will affect higher education. Most controversial is a levy on fees from international students that will go towards maintenance grants for disadvantaged students studying eligible courses. Chancellor Rachel Reeves has protected the block grant for university research in her budget statement Universities will have to pay "925 per international student per year starting in August 2028 if its intake passes 220 overseas students a year. This represents a 4.9% levy on the average annual fee of "19,000 for an international student; the government had originally proposed a 6% levy. Government models estimate the levy will generate "445 million in its first year. The international student levy has raised widespread concerns. The Campaign for Science and Engineering (CaSE) argues that at a…...

5+ day, 14+ hour ago (165+ words) Dyes meant to be a marker of oxidative stress may not be up to the job in bacteria. But does that really mean the hypothesis that reactive oxygen species aid antibiotics in killing bacteria can be discarded? In 2024, Imlay and his colleague Sergey Korshunov published a study concluding that the first method was unreliable. Feeding antioxidants to cells tends to slow their growth, they demonstrated, and slower-growing cells are inherently more resistant to stress. In the new work, they turned their attention to the dyes. 1 S Korshunov and J A Imlay, Proc. Natl. Acad. Sci. USA, 2025, DOI: 10.1073/pnas.2516113122 2 S Korshunov and J A Imlay, Mol. Microbiol., 2024, DOI: 10.1111/mmi.15286 3 M A Kohanski et al, Cell, 2007, DOI: 10.1016/j.cell.2007.06.049 4 Y Liu and J A Imlay, Science, 2013, 339, 1210 (DOI: 10.1126/science.1232751) 5 P Belenky et al, Cell Rep., 2015, DOI: 10.1016/j.celrep.2015.09.059 By Bradley van Paridon...

6+ day, 17+ hour ago (189+ words) A new metal'organic framework (MOF) selectively adsorbs two molecules of carbon monoxide at each metal site. The US-based researchers that developed it believe that the underlying chemistry may enable the design of MOFs that capture other gases with greater efficacy. The new MOF can bind two carbon monoxide molecules at each cobalt site MOFs were the focus of this year's Nobel prize in chemistry due to their ability to bind specific molecules, which makes them particularly useful for storage and filtration. In the vast majority of MOFs, each site in the framework can adsorb a maximum of one target molecule. The adsorption of one carbon monoxide molecule triggers a spin transition on the cobalt centre that facilitates the insertion of a second carbon monoxide between the metal and a methyl group that was directly bound to it The researchers are…...

1+ week, 12+ hour ago (231+ words) For the first time, scientists have shown that mechanoluminescence can occur in the absence of a crystalline phase and polymer matrix, using amorphous solids made from copper complexes." Mechanoluminescence is light emitted in response to mechanical stress, such as grinding or friction. It's usually linked to rigid crystals, but repeated breakage reduces their size and weakens the effect, limiting their applications. It can also occur in crystalline compounds combined with a polymer matrix. In 2020, a team surrounding Julia Khusnutdinova and Ayumu Karimata from the Okinawa Institute of Science and Technology (OIST) in Japan, showed that a family of copper complexes was mechanoluminescent not only in the crystalline state, but also as amorphous physically blended polymer films." Remarkably, friction-induced mechanoluminescence was seen across the entire family of complexes, suggesting it depends on factors other than those that govern crystalline materials. The…...

1+ week, 4+ day ago (224+ words) X-ray diffraction revealed that the N-heterocyclic carbene and aryl substituents were nearly orthogonal to each other to improve orbital overlap (blue, nitrogen; orange, phosphorus; white, carbon; black, lead) A compound which features multiple bonds between lead and carbon has been isolated and characterised. This heteronuclear "plumbyne" fills a gap among group 14 alkyne analogues and could offer a starting point to create rarer main group species. Bonding in organo-lead compounds is typically limited to single lead'carbon bonds, owing to lead"s large atomic size and poor orbital energy match to other atoms. Relativistic effects also suppress lead"s ability to form higher-order " bonds. Compounds where lead forms multiple bonds to other lead, transition metal or non-metal atoms exist, but are rare. By balancing electronic and steric factors, researchers in China have now created a compound that features multiple bonds between lead…...

1+ week, 5+ day ago (241+ words) Planar B6 ring is aromatic in nature, comparable to benzene in sandwich complexes All-boron benzene analogue stabilised by monometallic template - Share this on Facebook Share this on X (Twitter) Share this on LinkedIn Share this on Bluesky Share this on Reddit Share this on WhatsApp Share this by email More share options Researchers in India have prepared an all-boron analogue of benzene. It consists of a planar six-membered boron ring that's stabilised by a single osmium pentamethylcyclopentadienyl complex. Boron's electron deficiency makes it prefer three-dimensional polyhedral structures over chains and rings. In 2019, US researchers reported the first boron analogue of a metallabenzene " a six-membered ring with five boron atoms and one rhenium atom, plus an extra boron atom in the middle. Over the past 30 years, scientists have made planar rings containing three, four and five boron atoms by stabilising them with…...