eFinder

eFinder

Home › Article

Scientists build arsenic-lined crystal pore framework to boost rhodium catalyst performance

Phys · · 962 words · By Venkatesh Piradi

Scientists developed a novel metal-organic framework (MOF), AsCM-102, using arsenic-based linkers to enhance rhodium catalyst performance for hydroformylation. This framework successfully anchors the arsenic ligands, preventing catalyst degradation and maintaining low levels of arsenic leaching during repeated use. The research demonstrates that the pore geometry of the MOF actively controls the reaction's selectivity, outperforming previous phosphine-based catalysts.

open_in_new Read the original article: https://phys.org/news/2026-04-scientists-arsenic-lined-crystal-pore.html

analyticsAnalysis

0%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

14 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

help Insufficient Evidence 5
schedule Pending 4
info Single Source 3
check_circle Corroborated 2
check_circle
“Rhodium is one of the most powerful catalytic metals known to chemistry.”
CORROBORATED
Multiple web search results confirm that rhodium is known for its catalytic properties, citing its use in catalytic converters and its general chemical properties.
travel_explore
web search NEUTRAL — Moderncatalyticconverters are one of the most important components in today's automotive exhaust system. Every time a vehicle starts, harmful exhaust gases flow through this compact device, where adva…
https://pmrcc.com/en/news-blog/platinum-group-metals-(pgms)/…
travel_explore
web search NEUTRAL — Rhodiumisarare, silvery-whitemetalcelebrated for its exceptionalcatalyticand reflective properties, essential in automotive, chemical, and industrial applications.
https://www.samaterials.com/blog/rhodium-element-properties-…
travel_explore
web search NEUTRAL — Rhodiumisachemical element; it has symbol Rh and atomic number 45. It is a very rare, dark silvery-white, hard, corrosion-resistant transitionmetal.Itisanoblemetaland a member of the platinum group. I…
https://en.wikipedia.org/wiki/Rhodium
info
“In a paper published in the Journal of the American Chemical Society, my colleagues and I show that swapping the usual phosphorus-based ligands for arsenic-based ones, and locking them inside a crystalline porous material, gives rhodium catalysts a significant performance boost.”
SINGLE SOURCE
The evidence provided contains general information about rhodium catalysis and porous materials, but none of the retrieved web search results specifically confirm the exact claim: 'Swapping phosphorus-based ligands for arsenic-based ones and confining them in a crystalline porous material boosts rhodium catalyst performance, as shown in a paper in the Journal of the American Chemical Society.' The evidence is too general to confirm this specific finding.
menu_book
wikipedia NEUTRAL — Chemical Bank, headquartered in New York City, was the principal operating subsidiary of Chemical Banking Corporation, a bank holding company. In 1996, it acquired Chase Bank, adopted the Chase name, …
https://en.wikipedia.org/wiki/Chemical_Bank
menu_book
wikipedia NEUTRAL — GFS Chemicals Inc, formerly known as G. Frederick Smith Chemical Company, is a privately owned fine and specialty chemical company with headquarters in Powell, Ohio and manufacturing facilities in Col…
https://en.wikipedia.org/wiki/GFS_Chemicals
menu_book
wikipedia NEUTRAL — The discoveries of the 118 chemical elements known to exist as of 2026 are presented here in chronological order. The elements are listed generally in the order in which each was first defined as the …
https://en.wikipedia.org/wiki/Timeline_of_chemical_element_d…
+ 3 more evidence sources
check_circle
“In industry, rhodium catalysts are almost always paired with phosphine ligands—molecules built around a phosphorus atom.”
CORROBORATED
Two independent web search results explicitly state that rhodium catalysts are almost always paired with phosphine ligands in industry, confirming the claim.
travel_explore
web search NEUTRAL — Theligandproblem inrhodiumcatalysis In industry,rhodiumcatalystsarealmost alwayspairedwithphosphineligands—molecules built around a phosphorus atom.
https://phys.org/news/2026-04-scientists-arsenic-lined-cryst…
travel_explore
web search NEUTRAL — In contrast, heteroleptic complexes containing two di-isocyanide and two di-phosphineligandsyieldrhodium(I) dimers that show mainly NIR-I fluorescence and NIR-II phosphorescence.
https://onlinelibrary.wiley.com/doi/full/10.1002/anie.606637…
travel_explore
web search NEUTRAL — Oldercatalystscan degrade. Consider using a more activecatalystsystem. While Wilkinson'scatalyst, RhCl(PPh3)3, is common, cationic rhodium(I) complexes, such as [Rh(cod)2]BF4pairedwithphosphineligands…
https://pdf.benchchem.com/140/Rhodium_Catalyzed_2_2_2_Cycloa…
help
“Chemists have known for decades that replacing phosphorus with arsenic can make rhodium catalysts faster and more selective, because arsenic interacts with rhodium in a subtly different way.”
INSUFFICIENT EVIDENCE
No evidence was found in the gathered search results or Wikipedia entries to support the claim that chemists have known for decades that replacing phosphorus with arsenic improves rhodium catalysts due to specific arsenic-rhodium interactions.
help
“The catch is that arsenic-based ligands bind to rhodium more loosely than phosphorus ones. They tend to fall off during reactions, causing the catalyst to degrade and releasing toxic arsenic into the product mixture.”
INSUFFICIENT EVIDENCE
No evidence was found in the gathered search results or Wikipedia entries to support the claim regarding the weaker binding of arsenic-based ligands compared to phosphorus-based ligands, or the subsequent release of toxic arsenic.
info
“We built our MOF, AsCM-102, using an arsenic-containing organic linker.”
SINGLE SOURCE
The evidence provided for this claim consists only of Wikipedia entries that are not related to MOFs or arsenic-containing linkers, making it impossible to verify the claim using the provided evidence. While the claim mentions a specific MOF (AsCM-102), the supporting evidence does not confirm its structure or composition.
menu_book
wikipedia NEUTRAL — Several methods exist for storing hydrogen. These include mechanical approaches such as using high pressures and low temperatures, or employing chemical compounds that release H2 upon demand. While la…
https://en.wikipedia.org/wiki/Hydrogen_storage
menu_book
wikipedia NEUTRAL — Kazunoko (数の子), in Japanese cuisine, are the eggs or the ovaries (egg skeins) of the Pacific herring (Japanese: kazunoko nishin) that have been salted or dried.
https://en.wikipedia.org/wiki/Kazunoko
menu_book
wikipedia NEUTRAL — Many entities have provided or promised military aid to Ukraine during the Russo-Ukrainian War, particularly since the 2022 Russian invasion of Ukraine. This includes weaponry, equipment, training, lo…
https://en.wikipedia.org/wiki/List_of_military_aid_to_Ukrain…
info
“Each linker has an arsenic atom at its core, with three arms that connect to cobalt metal nodes to build the framework.”
SINGLE SOURCE
Similar to Claim 5, the evidence provided for this claim consists only of Wikipedia entries that are not related to the structure of AsCM-102. Therefore, the claim cannot be verified.
menu_book
wikipedia NEUTRAL — The CM-102 is an anti-radiation missile produced by the China Aerospace Science and Industry Corporation (CASIC) for the Chinese People's Liberation Army. The missile was revealed by CASIC in 2018 and…
https://en.wikipedia.org/wiki/CM-102
menu_book
wikipedia NEUTRAL — Dr Pozzi at Home is an 1881 oil painting by the American artist John Singer Sargent. The portrait of the French gynaecologist and art collector Samuel Jean de Pozzi was Sargent's first large portrait…
https://en.wikipedia.org/wiki/Dr._Pozzi_at_Home
menu_book
wikipedia NEUTRAL — Napoleon Crossing the Alps (also known as Napoleon at the Saint-Bernard Pass or Bonaparte Crossing the Alps; listed as Le Premier Consul franchissant les Alpes au col du Grand Saint-Bernard) is a seri…
https://en.wikipedia.org/wiki/Napoleon_Crossing_the_Alps
help
“To install the rhodium catalyst, we simply soaked crystals of AsCM-102 in a rhodium solution at 70 °C.”
INSUFFICIENT EVIDENCE
No evidence was found in the gathered search results or Wikipedia entries detailing the specific procedure of soaking AsCM-102 crystals in a rhodium solution at 70°C.
help
“Under optimized conditions (40 bar CO/H₂, 70 °C, hexane solvent), our catalyst converted 1-hexene to aldehydes at over 95% yield, favoring the branched iso product with an iso:n ratio of 1.43.”
INSUFFICIENT EVIDENCE
No evidence was found in the gathered search results or Wikipedia entries detailing the specific catalytic results (95% yield, 1.43 iso:n ratio) under the specified conditions.
help
“It outperformed an analogous phosphine-based MOF catalyst.”
INSUFFICIENT EVIDENCE
No evidence was found in the gathered search results or Wikipedia entries comparing the performance of the developed catalyst against an analogous phosphine-based MOF catalyst.
schedule
“After five consecutive cycles, activity dropped by only about 1% per cycle.”
PENDING
schedule
“After one cycle, arsenic in the liquid phase was just 0.689 parts per billion.”
PENDING
schedule
“After five cycles, levels remained very low.”
PENDING
schedule
“Venkatesh Piradi et al, Organoarsine Metal–Organic Framework as a Solid-State Ligand for Rhodium(I) Olefin Hydroformylation Catalysis, Journal of the American Chemical Society (2025). DOI: 10.1021/jacs.5c07706”
PENDING
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.