chemistry

Tris(2-phenylpyridine)iridium

Tris(2-phenylpyridine)iridium is a chemistry 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 Tris(2-phenylpyridine)iridium rather than just read about it. In short: Tris(2-phenylpyridine)iridium, abbreviated [Ir(ppy)3] is the organoiridium complex with the formula Ir(C6H4-C5H4N)3. The complex, a yellow-green solid, is a derivative of Ir3+ bound to three monoanionic 2-pyridinylphenyl ligands.

Key takeaways

Tris(2-phenylpyridine)iridium belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tris(2-phenylpyridine)iridium to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tris(2-phenylpyridine)iridium from memory before moving on to harder problems.

Reference excerpt

Tris(2-phenylpyridine)iridium, abbreviated [Ir(ppy)3] is the organoiridium complex with the formula Ir(C6H4-C5H4N)3. The complex, a yellow-green solid, is a derivative of Ir3+ bound to three monoanionic 2-pyridinylphenyl ligands. It is electroluminescent, emitting green light. The complex is observed with the facial stereochemistry, which is chiral. The complex is prepared by cyclometalation reactions of 2-phenylpyridine and iridium trichloride, as represented by this idealized equation:

IrCl3 + 3 C6H5-C5H4N → Ir(C6H4-C5H4N)3 + 3 HCl The complex and many analogues have been investigated for application in photoredox catalysis. Its excited state has an oxidative potential of −2.14 V, nearly 1 V more negative than the oxidative potential of excited [Ru(bipy)3]2+.

References

Illustrations

Worked examples

Example 1 — a first encounter with Tris(2-phenylpyridine)iridium

Start with the simplest possible case. Write down what Tris(2-phenylpyridine)iridium claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, 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 Tris(2-phenylpyridine)iridium 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 Tris(2-phenylpyridine)iridium 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 Tris(2-phenylpyridine)iridium

In research: Tris(2-phenylpyridine)iridium appears in chemistry 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 Tris(2-phenylpyridine)iridium 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: Tris(2-phenylpyridine)iridium is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2-Pyridyl compounds, Organoiridium compounds, Photochemistry, so understanding it makes those chapters shorter.
In everyday life: Look for Tris(2-phenylpyridine)iridium 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 Tris(2-phenylpyridine)iridium in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tris(2-phenylpyridine)iridium 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 Tris(2-phenylpyridine)iridium out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tris(2-phenylpyridine)iridium in simple terms?

Why does Tris(2-phenylpyridine)iridium matter?

Because it connects several chemistry 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 Tris(2-phenylpyridine)iridium?

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 Tris(2-phenylpyridine)iridium.