science

Perfluorodecalin

Perfluorodecalin is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Perfluorodecalin rather than just read about it. In short: Perfluorodecalin (C10F18) is a fluorocarbon, a derivative of decalin in which all of the hydrogen atoms are replaced by fluorine atoms. It is chemically and biologically inert and stable up to 400 °C.

Key takeaways

Perfluorodecalin belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Perfluorodecalin to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Perfluorodecalin from memory before moving on to harder problems.

Reference excerpt

Perfluorodecalin (C10F18) is a fluorocarbon, a derivative of decalin in which all of the hydrogen atoms are replaced by fluorine atoms. It is chemically and biologically inert and stable up to 400 °C. Several applications make use of its ability to dissolve gases.

Manufacture It is manufactured by the fluorination of tetralin or decalin with cobalt(III) fluoride in the Fowler process. For most applications, several steps of purification are required after reaction.

Isomers Perfluorodecalin exhibits cis-trans isomerism, as the tertiary fluorines atoms on the bridge carbon atoms can be either on the same side as each other (cis-isomer) or on opposite sides (trans-isomer). Both isomers are chemically and biologically inert and are very similar in their physical properties. The most notable difference is in the melting point, which is −3.6 °C for the cis-isomer, +18 °C for the trans-isomer, and −6.7 °C for a 50/50 mixture.

Medical applications Of all the perfluorocarbons, perfluorodecalin has probably seen the most interest in medical applications. Most applications utilize its ability to dissolve large amounts of oxygen (100 mL of perfluorodecalin at 25 °C can dissolve 49 mL of oxygen at STP). Perfluorodecalin was an ingredient in Fluosol, an artificial blood product developed by Green Cross Corporation in the 1980s. It is also being studied for use in liquid breathing, and alternative methods for emergency treatment of respiratory failure. Perfluorodecalin can be applied topically, to provide extra oxygen to a specific location, to accelerate wound healing. Organs and tissues can be stored for longer in oxygenated perfluorodecalin; the "two-layer method" uses perfluorodecalin and UW solution to preserve tissue for pancreas transplants. It is an ingredient of Perftoran, a blood substitute that also contains perfluoro-N-(4-methylcyclohexyl)-piperidine along with a surfactant, proxanol-268. It was developed in Russia and as of 2005 was marketed there.

Other applications Due to its gas-carrying capacity, perfluorodecalin has been used to enhance oxygen delivery during cell culture. Perfluorodecalin has also been shown to dramatically enhance in vivo microscopy resolution of airspace-containing tissues such as mesophyll. Mounting leaves in perfluorodecalin significantly improves the optical qualities of the leaf, thereby enabling high-resolution imaging over twofold deeper into the mesophyll, compared with using water. The physiological impact of mounting the specimen in perfluorodecalin is also minimal compared to water. Perfluorodecalin is partially miscible with hydrocarbons which makes it an attractive inert anti-solvent for some specialized applications, such as self-organization of perovskite nanocrystals into supercrystals (also known as superlattices). This compound is sometimes used to dissolve Teflon AF (not to be confused with other Teflons, as PTFE, PFA and FEP).

References

External links Safety Data Sheet Archived 2016-06-16 at the Wayback Machine

Illustrations

Worked examples

Example 1 — a first encounter with Perfluorodecalin

Start with the simplest possible case. Write down what Perfluorodecalin claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Perfluorodecalin before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Perfluorodecalin ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Perfluorodecalin

In research: Perfluorodecalin appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Perfluorodecalin in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Perfluorodecalin is common in secondary-school and first-year university syllabi. It links to neighbouring topics Coolants, Decalins, Fluorocarbons, so understanding it makes those chapters shorter.
In everyday life: Look for Perfluorodecalin outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Perfluorodecalin in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Perfluorodecalin means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Perfluorodecalin out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Perfluorodecalin in simple terms?

Why does Perfluorodecalin matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Perfluorodecalin?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Perfluorodecalin.