Wojtek Stawski
@StawskiWojtek
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Postdoc @Besserchemistry , DPhil @HLAGroupOx , MPhil @Cambridge_Uni Nitschke lab. Chemist and crystallography user 🔫☢️💎 I like big, conjugated molecules 🦆🦄
Oxford, UK
Joined July 2019
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I wrote a VERY honest application for a postdoc position out of my expertise and got invited for an interview. The question is - do they think I could be good for them with my background or they just want to see who is this crazy person 😂 Will see soon 👀
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My small teaching project is done. 📽️ A series of videos about crystal structure refinement!
I struggled a lot when I was learning it myself and couldn't find resources that would describe/show it sufficiently, therefore decided to take care of it. (1/5)
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Stirring bars can turn life into a hell if they’re contaminated with some transition metals. Apparently, if they’re clean but made of wrong material, they can cause problems too. (1/3)
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THESIS SUBMITTED. Thanks to those who supported and believed in me and f*** those who doubted that this boy can get into Oxbridge and do some cool science 🎉
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What are the chances for getting a paper published at
@NatureChemistry
on one's birthday?🎂We show that [18]annulene dianion not only looks different than claimed 51ys ago,but also can be reduced further to a tetraanion,forming a metallocene-like sandwich!
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Happy to present first paper of my PhD in
@HLAGroupOx
and seventh overall 😍 I think both CPP and porphyrin people are going to like it 😊 A lot of inspiration taken from previous works of Osuka and
@mvdelius
. (1/3)
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Finally published! We are showing structural evidence for global aromaticity in a macrocycle, anions of which have been known for >40 years but were never crystallized! It took us 3 WEEKS to get all the crystal structures 😂 (1/4)
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Having a glassblower at the department is a true blessing. Thank you, Terri! 😍 So cute!
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My first corresponding, two-author paper, at
@ChemicalScience
😁 X-ray structures of porphyrin nanorings. They’re more flexible than you think! We
@HLAGroupOx
report 3 pseudopolymorphs and a fullerene cocrystal. Look at this nice packing! (1/3)
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NO BRIDGES. NO LINKERS. DIRECTLY LINKED. We report first example of directly meso-meso linked porphyrin nanoring from 5,15-diarylporphyrin. EIGHTEEN porphyrins in a ring 💍 (1/3)
@HLAGroupOx
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It was yellow (and soluble) before I put it on a rotavap… 😭😭😭
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#RSCPoster
2023
#RSCOrg
#RSCMat
Fusion of Porphyrins Within a Strained Nanoring: Porphyrin Tape –Cycloparaphenylene Hybrids
for more details, see in OrgLett:
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I love when people say in procedures that they add anhydrous solvent but also add water 😅
#RealTimeChem
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Just signed my postdoc contract! Very happy to announce that I’m going to Germany and joining
@Besserchemistry
lab 🔋Looking forward to getting involved in the research community of Ulm and Germany! Many new things to learn and, hopefully, also many structures to determine ☢️💎
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And after graduation I showed to my mum and her partner some X-ray diffraction experiments. They didn’t fall asleep and asked questions so I guess that went ok.
@RigakuOxfordXRD
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I'm writing my thesis and just wanted to remind everyone that this excellent review written by
@MajewskiMarcinA
and
@stepienlab
exists and describes synthesis of (strained) macrocycles/molecules! Proved to be very useful for my intro section. 🧪✍️
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(3/3) And when a glass stir bar was used, the reaction worked perfectly well! 😁
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No, it’s not a lab accident - it’s made of ice! That’s a result of evaporation of solvent using ice bath on a rotary evaporator 😍 Faces of labmates before I mentioned it’s ice - priceless 😅 fun at
@HLAGroupOx
#RealTimeChem
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Thank you Qiang for involving me (just a tiny bit) in this
@NatChem
study and super huge congratulations everyone on the results of your hard work on these spectacular porphyrin nanoribbons!
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OMG I won a prize for the best talk 🥹 now time for a chill time with crystallographers
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These molecules look so 'ugly' and irregular that it makes them soooo beautiful and fascinating😍
Congatulations!
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I was invited to write an opinion article for Chemistry World about the importance of sharing what didn’t work within the context of our recently published results. Have a look!
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Got crystals that have perfectly circular shape. And they diffract! 😍 Unfortunately they’re too small and I will have to wait for the repair of our rotating anode instrument. View from two different perspectives:
#crystallography
#RealTimeChem
@RealTimeChem
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Just started my 2-month research visit in group of prof. Marina Petrukhina in Albany, NY 🥰 My baby macrocycles are waiting for me in a freezer after being shipped for some insanely large amount of money 😅Now trying to deal with jetlag and culture shock 😝
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If you're interested in the behind-a-paper story about our
@NatureChemistry
paper on [18]annulene anions, have a look at our post on a Nature blog:
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Dear Chemists,
when you optimize geometry of a new molecule please add xyz coordinates to the SI/add a separate file…
@RealTimeChem
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Over 2 years after the project started and a lot of hard work our our team, it’s finally out! My fifth paper from the period of my BSc studies! If you like anthracenes and aromatic macrocycles, check it out!
@PawlickiLab
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(2/3) During work on this project, I managed to aromatize a nanoring but couldn’t reproduce it. After months I realized that when it worked, I used a stir bar that went black after other rxn with Li. Apparently, teflon reacts with active metals and forms species that interfere!
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Beautiful! Congrats Yikun and everyone!
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Super happy to win the prize for my talk at
@polymatsptl
, a big thank you to organizers, sponsors and all participants for your kind words and support! (1/3)
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Super huge congrats to
@IagoPozo
et al. and thank you for involving me a little bit in this project! 😍 If you like porphyrins or vanadium or EPR or any combination of these words, have a look!
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Yes yes thank you berry berry much
@mcgonigalgroup
and
@EdAndersonGroup
😇
Congratulations to
@StawskiWojtek
for passing his DPhil viva today! 🍾 And thank you to
@EdAndersonGroup
and
@mcgonigalgroup
for examining.
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Spent a small college book grant for some new books - both are very nice and helpful! Thanks for writing them
@jonathan_steed
@crystalmooc
😁
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Finalizing my last structure in the group. Of course it has to be something I will remember, so 1.1A resolution, why not 😂
#crystallography
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Spotted in NMR lab 🥰 Helium cryoprobe platform seems to be really useful!
@RealTimeChem
@OxfordChemistry
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@ithinkwellHugh
Sorry but it is NOT possible to plan three years of a PhD in experimental subjects like this 😅😅😅 Sometimes I don’t even know what I’ll be doing next week because it depends on a results that I will get tomorrow 😝
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Had a great pleasure to deliver a lecture at
@TU_Muenchen
. Thank you
@apoethig
for inviting me!
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/ wow! crystals!
[diffract suspiciously too well, small cell]
Apparently, instead of a desired compound crystallised from decalin, the crystal that I measured for a postdoc is... decalin hydroxyperoxide!
#crystallography
#RealTimeChem
😂
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A bit too concentrated but looks really nice! Every spot is a different substitution product (substrate, mono, di, tri-).
#realtimechem
#chemistry
#research
#porphyrin
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Successful beamtime, today a new baby catenane structure was born! 🤗 💍🪡
@HLAGroupOx
@DiamondLightSou
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Checking samples before beamtime. Some of them definitely don’t need synchrotron 😍
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New video in my SC X-ray series, this time an example of a non-merohedral twin; we process and refine data of a single crystal, then of a twin but treating it as a single crystal and then of the twin treating it like a proper twin, and compare the results!
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I’ve realised one of my childhood dreams - used cesium metal 🥹
It becomes liquid after warming it with hands and you can just pipette it😍
@RealTimeChem
#research
#chemistry
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Exciting theoretical study, especially “de-convolution” of the AICD plots of these anions summarizing what
@aromaticity_eu
has been tweeting a lot about. Imho if real and correct, this is quite revolutionary for the field. Now grabbing popcorn 🍿and waiting for comments.(1/2)
Global π-aromaticity in conjugated macrocycles does not stem from the resonance of Kekulé structures but from the superposition of Clar structures that already possess local π-aromaticity: "Decoding Aromaticity in the [24]paracyclophanetetraene Anions"
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Very cool stuff from collab of prof. P.J. Chmielewski and Xiaofang Li! Magic transformation 🪄 of norcorrole into azacorrole.
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Good start of the day. Taking into account my ‘luck’, they won’t diffract at all 😅
#RealTimeChem
#crystallography
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Something I call a wireless reflux ☠️ so much new stuff to learn when working in teaching labs
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Porphyrinoids are haunting me everywhere, even at a train station in Garching.
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THIS PAPER WILL BLOW YOUR MIND
@PawlickiLab
@cojawidze
discovered and experimentally verified through-space delocalisation in a figure-eight system - electrons prefer to go through space making the currents not cancel each other! 😍😍😍
@ChemistryWorld
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Finished dealing with my most complicated structure so far: 5 disordered THFs, whole disordered macrocycle, two atoms sharing same site (exyz,eadp used for the first time!) +unstable in the air. Fun 😅
#crystallography
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My
#OSSC2020
presentation has just finished! (the voice was awful though 😭) I hope you enjoyed the science :) If you didn't have an opportunity to watch, there are some slides below!
@PawlickiLab
Feel free to ask questions here or mail me! w.stawski97
@gmail
.com
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Measured, processed, solved and refined my first twin! 😍 A lot of heavy metals inside, fluorescence issues and measured resolution up to 1.13A but it worked! 💡🔫💎✨ Of course, the structure is crazy as usual in our group 😂
#crystallography
@RealTimeChem
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It might be my last 💎samples measured in Oxford;
@arnaurr94
I’m going to have some good news 👀
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Okay, it happened. I think I can call myself a CRYSTALLOGRAPHER now. A professionalist said my way of modelling of a specific disorder is better than theirs and asked for a .res file.
#PhDgoals
#crystallography
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@marinacuropi
@HLAGroupOx
Also, have a look at the HUGE 1H NMR chemical shift changes upon reduction - from almost 32 ppm to almost -8.5 ppm ! 😲
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Okay that diffuse scattering looks hot. A stacked complex of two molecules. Makes my life a hell but it’s beautiful🥹 Am I right
@stecanossa
@ntumanov_Xray
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(2/3) We use an idea of a covalent template. First we make radial 18mer by cobalt-catalyzed cyclotrimerization. I think it’s the largest molecule obtained in this type of reaction (molecular weight > 21kDa !!! ) Then we just stitch zinc(II) porphyrins together.
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Congratulations
@bodipy_marco
@PawlickiLab
!!! Just look at this double-decker boron complex 😍😍😍
@Boron_Chemistry
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It feels weird that Oxford didn’t want me for undergrad 7 years ago and yesterday I was the one who was interviewing some of the Oxford PhD applicants 😅
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A good title is important. Preparing stuff for a crystallography workshop in München 😊
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And the new Dr will be looking for a postdoc soon, so y’all know… 👀
Congratulations to
@StawskiWojtek
for passing his DPhil viva today! 🍾 And thank you to
@EdAndersonGroup
and
@mcgonigalgroup
for examining.
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(2/3) Moreover, the tetraanion also SELECTIVELY forms a heteroleptic sandwich with corannulene!
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I'm writing a paper and it's amazing how easier and just more fun the whole process looks like, having written the previous ones and seeing how much my writing skills progressed over time! 😍 [also getting a heart attack looking at the quality of images in my BSc thesis lol]
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I made crystals that can be bent. Cutting them is problematic because of that 😅
#crystallography
#chemistry
#RealTimeChem
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R.I.P. my little angel 😭 He left us at 200K. I hope the transition didn’t hurt too much
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That pain, finding at the end of preparing SI that synythesis of a 'known' compound used by many research groups actually has never been reported and you have to measure all NMR, MS data and change all numeration...
@RealTimeChem
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@AnetaGrabm
@PhDVoice
Giving a 5min speech is not the only scientific purpose of a conference…
#BuildingNewConnections
#Collaborations
#LookingForNewResearchTopics
#Discussions
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@HLAGroupOx
@mvdelius
(3/3)
We added a section in the SI about reactions that did not work and what were our observations. For example, for reductive aromatization that made my life a hell for 6 months… I think it’s important for other researchers!
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Just submitted my first structure to
@ccdc_cambridge
as a crystallographer AND IT WAS OMG SO STRESSFUL 😆
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As I'm leaving the group soon, I'm inputting some of my useless structures to the
@ccdc_cambridge
. Check out 2375759-2375761! Here for example are halogen-bonded dioctyloxy diiodobenzenes. They form bendy crystals because of that, was quite diffucult to find a good one bc of that
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OMG I got a GRADUATION DUCK !!! 🦆 And it’s handmade! Thank you
@cojawidze
@PawlickiLab
🥰🥰🥰 I’m over the moon 🥹
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(2/4) Work with these anions is difficult because they hate any traces of oxygen and moisture so we had to use some fancy techniques. All stars aligned for us and in three weeks, we crystallized everything and diffracted the crystals at synchrotron. Everyone worked intensively!
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Me looking at inorganic people running their super strongly diffracting samples
#crystallography
@RealTimeChem
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Preparing a flash talk for RSC org chem symposium with that smelly belly right next to me 🥰
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