Jiazhen Chen

PhD student in chemistry at Northwestern

[Tracy Lohr @TLLohr]

Excited about this one! Congrats @yanshan_gao, @jiazhen_chen, and Yang on your @NatureCatalysis Paper! #ATeam #LubricantsfromEthylene https://t.co/w9gf4Y6BCA

[Tracy Lohr @TLLohr]

Last day at Northwestern. My amazing students and post-docs surprised me with this. I can’t thank them enough for the past few years #ATeam

[Jiazhen Chen @jiazhen_chen]

@heterocat I would recommend postersmith. I got the fabric poster 2 days after I uploaded the poster.

[Tracy Lohr @TLLohr]

Catalyst nuclearity effects on stereo- and regioinduction in propylene and 1-octene polymerization, congrats @yanshan_gao! https://t.co/DojIzWwz4k

[Jiazhen Chen @jiazhen_chen]

@RyanMewis Absolutely. Another interesting thing is whether scandium is unique in this reaction. So I’d like to try other rare earth metals with half-sandwich ligands. #RSCPoster #RSCInorg

[Jiazhen Chen @jiazhen_chen]

@ChMohammedJ I run GPC in trichlorobenzene at 150c. Such high temp is needed to dissolve high Mw polyolefins. I don’t have MALDI for these samples, their Mw are probably too high.

[Jiazhen Chen @jiazhen_chen]

@Marcel_Swart Only certain metals are active for olefin polymerizations. Ca and Zn are not active. Y should work, but I haven’t done any experiment with it yet.

[Jiazhen Chen @jiazhen_chen]

@morganagrom1 @UC_Chem @wpiers1 Is it possible to do CV on these BN containing organics? How does the HOMO LUMO energy change comparing with their CC analogues?

[Jiazhen Chen @jiazhen_chen]

@Yinyin_Bao Running GPC on these polymers were not successful to get PDI and Mw. It's possibly due to the amino group interaction with the column or with the trace water. We used DOSY to determine the diffusion coefficient of these polymers, the Mw should be roughly >100k.

[Jiazhen Chen @jiazhen_chen]

@RealTimeChem Running GPC on these polymers were not successful to get PDI and Mw. It's possibly due to the amino group interaction with the column or with the trace water. We used DOSY to determine the diffusion coefficient of these polymers, the Mw should be roughly >100k.

[Jiazhen Chen @jiazhen_chen]

@jo_usmc Great question! The lowest contact angle I got was ~88 degree with a copolymer w/ 12% AO incorporation. I believe if AO incorporation keeps increasing, the contact angle will be close to pure AO homopolymer. As a reference, polyolefin w/ contact angle 90-95 degree are adhesive.

[Jiazhen Chen @jiazhen_chen]

@jamie_carden These scandium complexes are light yellow. The polymer is colorless.

[Jiazhen Chen @jiazhen_chen]

@GriceChemistry @TLLohr The amine groups can react with strong acid such as HCl. We haven’t done any metal absorption experiments yet. I use NMR (H and C) to quantify the incorporation ratio

[Jiazhen Chen @jiazhen_chen]

Scandium-Catalyzed Self-Assisted Polar Comonomer Enchainment in Ethylene Polymerization #RSCPoster #RSCInorg #Catalysis #RSCOrg Should have #RSCCat and #RSCPoly next year!

[Jiazhen Chen @jiazhen_chen]

New article from my undergrad lab at Peking University https://t.co/nOSCKgCibg

[Inorganic Chemistry @InorgChem]

Near-infrared luminescent lanthanide complexes sensitive to temperature and viscosity were designed through tuning O-H vibration in the secondary coordination sphere of porphyrin. https://t.co/m59sWJ7nxf

[Nature Catalysis @NatureCatalysis]

Our Issue 1 editorial discusses what you can expect from Nature Catalysis
https://t.co/F82GeAJAlD (free to read)

[Weinberg College at Northwestern @WeinbergCollege]

Congrats to research asst prof Tracy Lohr, who has been named the first North American recipient of the Clara Immerwahr Award for her work in #catalysis! https://t.co/J2ySACpjJo @NUChemistryNews

[Jiazhen Chen @jiazhen_chen]

First angewandte paper! @TLLohr @angew_chem https://t.co/BWs74hY6nE

[Angewandte Chemie @angew_chem]

Scandium-Catalyzed Self-Assisted Polar Co-monomer Enchainment in Ethylene Polymerization (Marks) https://t.co/jE3GhMcodD

[Jiazhen Chen @jiazhen_chen]

Our paper on Sc-catalyzed polar monomer copolymerization is online! https://t.co/6qPt2XoPbF