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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchIn 2009, a Cambridge-led team reported enclosing a molecule of white phosphorus (P₄) inside a self-assembling molecular cage. While contained, the phosphorus did not spontaneously combust in air; adding benzene could release it. The result was a chemistry proof of concept, not a tested spill-cleanup system or a commercial storage product.
How did researchers cage white phosphorus?
The team, which included Prasenjit Mal, Boris Breiner and senior author Jonathan Nitschke at the University of Cambridge, working with Kari Rissanen at the University of Jyväskylä, used iron ions and organic linkers to form a container molecule. Its cavity could hold hydrophobic white phosphorus in its molecular P₄ form. The cage assembled around the guest, changing how the reactive molecule interacted with its surroundings.
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The Cambridge account reported that P₄ did not spontaneously combust in air while it was encapsulated. Benzene could then release the guest from the cage. These are reported laboratory findings; the account does not establish that the cage makes phosphorus harmless or safe to handle outside the contained state. University of Cambridge research news, reproduced by ScienceDaily, and a 2009 Chemistry World podcast describe the cage approach.
What did “tamed” mean—and what did it not mean?
“Tamed” describes the reported change in reactivity while the P₄ molecule was inside the cage: it did not spontaneously combust in air under the reported conditions. It does not mean the phosphorus was destroyed, permanently neutralized, or made safe for ordinary handling. The benzene-triggered release is central to the result: the guest could be recovered from its container.
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Nitschke said: “It is foreseeable that our technique might be used to clean up a white phosphorus spill, either as part of an industrial accident or in a war zone.” That was a proposed future use, not evidence that the researchers tested spill cleanup in the field or that the method was deployed.
How this differs from another P₄ study
A separate 2008 paper examined ruthenium coordination and P₄ hydrolysis. Its reported chemistry produced phosphorous acid and a ruthenium-coordinated 1-hydroxytriphosphane. That is distinct from the 2009 iron-and-linker cage, which contained P₄ and released it with benzene; the two studies describe different experimental strategies, not interchangeable cleanup or storage methods. The University of Florence repository record summarizes the 2008 work.
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Where to find the 2009 paper
The cage study appeared in Science in 2009, volume 324, pages 1697–1699. The Nitschke Group’s Cambridge archive lists the paper and its bibliographic details.
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