Donor–Acceptor Stenhouse Adducts as Intrinsically Photoswitchable Dynamic Covalent Bonds Combining dynamic covalent bonds with photoswitches allows the kinetics and thermodynamics of exchange to be controlled with light. However, this two-component strategy introduces synthetic and compatibility challenges. Here, we present a single-component strategy using donor–acceptor Stenhouse adducts (DASAs) as both the photoswitch and the dynamic covalent bond. DASAs isomerize from “open” to “closed” forms with light and heat, respectively. We discovered that open DASA isomers undergo dynamic covalent exchange of their amine donor via two pathways, reversible dissociation and conjugate transamination. Exchange can then be arrested upon irradiation to form the closed DASA isomer, offering a handle to gate dynamic behavior. Consequently, incorporating DASAs as cross-linkers in PDMS-based networks yields covalent adaptable networks (CANs) with viscoelastic behavior that can be tuned by light. We also identify degradation pathways that limit the reversibility of this system under extended heating. Overall, DASA exchange represents a synthetically accessible platform for photocontrolled soft materials. More broadly, this work introduces DASAs as a new class of intrinsically photoswitchable dynamic covalent bonds and lays the foundation for the discovery of other stimuli-gated dynamic bonds that combine reactivity and responsiveness in a single molecular unit.

🚨New research from @kalowlab.bsky.social:

“Donor–Acceptor Stenhouse Adducts as Intrinsically Photoswitchable Dynamic Covalent Bonds”

Read more in @jacs.acspublications.org: pubs.acs.org/doi/full/10....

Show your NU Chemistry pride! 💜🧪

The Fall Merch Shop is open through Oct 24—with fan favorites and new fall styles.

🎁 Perfect holiday gifts for Wildcats everywhere!

👉 bit.ly/NUChemMerch

Today we honor the staff whose dedication powers every experiment, every collaboration, and every breakthrough at #NUChemistry. Your hard work makes innovation possible. #LaborDay #TeamScience

These humans! 🫶🏼
#longweekend #gradschoolfriends

Since 2016, this is the book I pull out anytime I get frustrated with the political division in this country. #politics #religion

Learn about the #NUChemImpact. Our faculty are saving lives with science!

Having the opportunity to interview Harry Gray and hear his stories of Basolo’s mentorship was truly an honor! #MentorshipMatters

Boosting for visibility! I want to keep my #Memphis friends and family safe.

A spiral galaxy seen at a skewed angle. Its centre is a bright spot radiating light. A thick, stormy disc of material surrounds this, with swirling strands of dark dust and bright spots of star formation strewn through the disc. A large spiral arm extends from the disc towards the viewer. Some foreground stars are visible atop the galaxy.

this is one of those space images that’s “so beautiful it looks like a painting” 🌌

Under Hegseth, the Naval Academy removed books (Maya Angelou out, Mein Kampf in🤔) — then canceled a speech by Ryan Holiday who was going to talk about the importance of reading uncomfortable ideas.

Where’s the “free speech” Crowd on all this? www.nytimes.com/2025/04/19/o...

Writer’sTheater opening night parties are the best! #openingnight #translations

Welp, there goes the US defense industry.

Also, true story

The Project 2025 Song! YouTube video by Kravits

Love me a good educational song!

youtu.be/CvQhTbCY4xc?...

So often art explains better than any words.

😆

Just going to leave this here should it become useful to anyone…

CORRUPT AF: At least 11 federal agencies targeted by the Trump-Musk firings and cuts “have more than 32 continuing investigations, pending complaints or enforcement actions into Mr. Musk’s six companies."

Read more here: bit.ly/4jSg1VU

#ResistTrump

Stacking the room with softball pitchers 🥎

This is a NIRCam (Near-Infrared Camera) image from the James Webb Space Telescope of the "Cosmic Cliffs" in the Carina Nebula. The image is dominated by textured formations of gas and dust in warm tones of orange, brown, and gold, resembling a rugged cliff face. Bright, star-forming regions are visible within the cliffs, glowing with a soft light. The top portion of the image shows a transition to a deep blue, star-filled space. Numerous distinct stars are scattered throughout the image, some displaying a starburst effect from the telescope's optics.

JWST's "Cosmic Cliffs".
🔭 🧪

It’s been a hot minute since I worked on the producing side of filmmaking. 🎬
Today was a great reminder of how much I love being on this side of the camera.

Thanks @nuchemistry.bsky.social for the variety of exciting tasks I get working as your Marketing Specialist!

Tesla paid $0 in federal income tax last year.

2022: $0
2021: $0
2020: $0
2019: $0
2018: $0

Tesla reported $6.7 billion in profit in those years.

Carob chips! This was a real ‘trauma’ for this 80s kid ;)

FACT CHECK: Canada has already announced this plan BEFORE Trump announced his tariffs.

Beyonce winning Best Country Album at the Grammys gonna piss off allll the right people.

Imagine that

The gaslighting of the Republican Party does not shock me, I was raised in the evangelical church. Justifying flaws of leaders is in the DNA.

In 2020, it became apparent that a lot of people had been asleep in science class.

Well, in 2025, it’s become quite apparent that they slept through history class, too.

#Resist