Thulium (new) - Periodic Table of Videos

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i love how observations about how neil feels about the reactions are as important as the observations of the reactions themselves

That little mad scientist so excited of getting thulium for his birthday warmed my heart.

I laughed at Martyn's excitement at seeing Neil's office, as if Neil's such a hermit that nobody else has ever seen it 😄

A smiling thumbs up from Neil! I've never seen him so emotional.

Neil is my absolute favourite. Wears a vest and suspenders, has Jagermeister, brandy and a coin collection in his office, and never misses the chance to do a hydrogen pop test. Keep rocking buddy 🍻

Professor Martyn Poliakoff, thank you for all your amazing content and contributions over the years. As a boy I was very excited to watch your videos… and today I still get giddy when I see a notification! Godbless!

Trivalent thulium ions exhibit the very strange and rare property of anti-Stokes fluorescence upconversion. In addition to fluorescing blue under the ultraviolet as seen, it will also fluoresce blue when irradiated with high intensity INFRARED light, naively appearing to violate fundamental thermodynamics (the excitation photon energy is LOWER than the emission photon energy!), but what's really going on is triplet-triplet annihilation, where two ions in their excited states interact to add their excitation energy together into another ion which then undergoes normal relaxation with emission of a photon at approximately double the excitation photon energy.

I still remember watching these videos back in middle school... And now I'm almost at the end of my education, working towards a master's degree. Time really goes by fast, and seeing the professors gray hair just makes me kinda nostalgic 😢

1:15 Charles James is one of my heroes for his tireless persistence in crystallizing rare earths, and his modesty (and dedication to science over politics) in allowing Urbain to take credit for lutetium.

Professor Poliakoff is one of those rare human beings that I greatly respect in their field, and adore as a human being - despite never meeting. I appreciate the team for making these videos and the work that goes into them, and the professor's wonderful descriptions and clear explanations.

I seriously get so happy when you guys upload another video. I wish there were more content from this channel, I cant get enough.

The only thing I knew about thulium before this video was the way Tom Lehrer carefully pronounced it in 'The Element Song'.

Neil is always a some mysterious person, never speaks, but in fact I am quit jealous about his job. Working with special equipment, and performing tests where everybody can always only dream about😋

Is that Neil saying "That's a really nice sample"? 😃💜

Just love how these overlooked elements are actually so interesting and amazing

Hi Martyn, I love your videos. I've been watching them for almost a decade or more and still seems to be yesterday I discovered your channel, 😂. Please, live for another 2000 years !!!! We need professors like you to make the World understand how important and delightful is to study Chemistry. Thank you for existing and being such a lovely person....🙏🙏🙏

„Quite exiting. His office has no outside windows“ 😂 Poor Neil!

Thank you for making these nearly impossible experiments, their results, context, and historical perspective understandable for mere mortals! Bravo! BTW, my little daughter amiably calls you "Professor Fuzzy", obviously referring to your unique recognisable hairstyle.

Love your videos! I have shared a few with friends. Keep up the excellent work! Cheers ! !