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Ivan Aprahamian

@aprahamian

Chemistry Professor at Dartmouth. Into tiny switches and machines, adaptive materials, and molecular communication systems.

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01.09.2023
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Latest posts by Ivan Aprahamian @aprahamian

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Wow -- as first spotted by @BadFoxGraphics on X, Fox & Friends this morning used *old footage of a previous dignified transfer* to mislead their audience about the fact that Trump wore a baseball cap during the one yesterday

08.03.2026 13:24 πŸ‘ 12953 πŸ” 4910 πŸ’¬ 921 πŸ“Œ 695
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Dozens killed as Israeli special forces raid Lebanese village in search of 40-year-old remains Overnight, one Israeli operation saw at least 41 people killed and 40 injured, according to the Lebanese health ministry.

Pretty serious allegation here. "Witnesses told the BBC that the Israeli soldiers had arrived disguised in Lebanese military fatigues and used ambulances with signs of Hezbollah's Islamic Health Organization."
www.bbc.co.uk/news/article...

08.03.2026 13:28 πŸ‘ 1745 πŸ” 840 πŸ’¬ 56 πŸ“Œ 152
Sign in - Google Accounts

Looking forward to the SupraChem 2026 meeting at
@tu-dortmund.de sites.google.com/view/suprach...
@suprachem2026.bsky.social
#chemsky

08.03.2026 11:26 πŸ‘ 7 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

There's something deeply obscene and broken about the fact that Donald Trump and Pete Hegseth are bombing elementary schools in an illegal war of aggression, and there's still a sense among the opposition that it has to be explained in terms of gas prices in order to get American voters to care.

08.03.2026 02:12 πŸ‘ 17804 πŸ” 4800 πŸ’¬ 618 πŸ“Œ 250
One way to look at Newton's First La of Motion is that it takes one unbalanced force to change anything.
Not majority opinion. Not good intentions. One unbalanced force, applied persistently, in a direction.
Be that unbalanced force of change on March 7th.

Take Back Our Science Rally
standupforscience.net/march7

One way to look at Newton's First La of Motion is that it takes one unbalanced force to change anything. Not majority opinion. Not good intentions. One unbalanced force, applied persistently, in a direction. Be that unbalanced force of change on March 7th. Take Back Our Science Rally standupforscience.net/march7

Still not sure if you should attend a Take Back our Science Rally today? If you do nothing, nothing will change, and the way the current administration deals with science, things need to change.

Visit this link to find your local rally!
fight2win.standupforscience....

#March7

07.03.2026 12:30 πŸ‘ 54 πŸ” 19 πŸ’¬ 0 πŸ“Œ 4

Tragic. Please pass this along to US Chairs and Deans, and consider it when you sit on promotion committees. This, combined with the review backlog, is dire - especially for our early career researchers.

07.03.2026 05:45 πŸ‘ 61 πŸ” 23 πŸ’¬ 3 πŸ“Œ 0
Netanyahu: β€˜These So-Called Genocide Experts Have Probably Never Committed A Genocide In Their Lives’

Netanyahu: β€˜These So-Called Genocide Experts Have Probably Never Committed A Genocide In Their Lives’

Netanyahu: β€˜These So-Called Genocide Experts Have Probably Never Committed A Genocide In Their Lives’ https://theonion.com/netanyahu-these-so-called-genocide-experts-have-probably-never-committed-a-genocide-in-their-lives/

05.03.2026 22:00 πŸ‘ 2836 πŸ” 593 πŸ’¬ 33 πŸ“Œ 28

It is a good time to reach out to your friends/colleagues who are from the middle east

02.03.2026 11:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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As a professional military strategist, I just wanted to make sure everyone has a full understanding of the American strategy in Iran, thank you for your attention to this matter

28.02.2026 08:27 πŸ‘ 6166 πŸ” 1821 πŸ’¬ 157 πŸ“Œ 95
Netanyahu Calls Iran Strikes Necessary To Prevent War He Just Started

Netanyahu Calls Iran Strikes Necessary To Prevent War He Just Started

Netanyahu Calls Iran Strikes Necessary To Prevent War He Just Started

28.02.2026 07:19 πŸ‘ 23683 πŸ” 7120 πŸ’¬ 735 πŸ“Œ 406
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30 years.

This video should be on every network.

26.02.2026 13:27 πŸ‘ 15940 πŸ” 8472 πŸ’¬ 1012 πŸ“Œ 918

I'm a organic materials chemist with experience in synthesis and characterization of small molecules and polymers. I have recently returned to Ontario after 18 years in the US. I'm looking for opportunities in and around the Greater Toronto Area, if possible. Would love to chat! #chemchat #chemjobs

24.02.2026 22:36 πŸ‘ 2 πŸ” 8 πŸ’¬ 0 πŸ“Œ 0
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Satellite proposals threaten the night sky In the United States, the Federal Communications Commission (FCC), the agency responsible for authorizing satellite launches and operations…

The FCC just opened public comments on SpaceX's plan to launch a million satellites to do AI compute in space. Under the current proposal, an environmental review won't be required. Please consider submitting a public comment to oppose this damaging plan.
darksky.org/news/two-sat...

22.02.2026 19:21 πŸ‘ 3577 πŸ” 2754 πŸ’¬ 125 πŸ“Œ 424
DOGE Bro’s Grant Review Process Was Literally Just Asking ChatGPT β€˜Is ThisΒ DEI?’ Federal grants that had been approved after a full application and review process were terminated by some random inexperienced DOGE bros based on whether ChatGPT could explainβ€”in under 120 charactersβ€”that they were "related to DEI." That's what the newly released proposed amended complaint from the Authors Guild against the US government reveals about how DOGE actually decided which National Endowment for the Humanities grants to kill.

DOGE Bro’s Grant Review Process Was Literally Just Asking ChatGPT β€˜Is ThisΒ DEI?’

Federal grants that had been approved after a full application and review process were terminated by some random inexperienced DOGE bros based on whether ChatGPT could explainβ€”in under 120 charactersβ€”that they were…

19.02.2026 17:25 πŸ‘ 804 πŸ” 349 πŸ’¬ 26 πŸ“Œ 97

BREAKING: The Department of Education has ended its directive that attempted to restrict diversity, equity, and inclusion efforts in schools nationwide.

This is a victory for academic freedom and education equity.

18.02.2026 17:39 πŸ‘ 41058 πŸ” 10834 πŸ’¬ 476 πŸ“Œ 1028
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C3-Symmetric Photoresponsive Chiral Dopants Based on Tribenzotriquinacene Doping cholesteric liquid crystals (CLCs) with photoresponsive chiral molecules is an effective strategy for devising responsive soft materials, as it allows for the phototuning of the noncovalent interactions in the CLCs, and hence, their helical pitch and optical properties. Here we describe the use of tribenzotriquinacene-based (TBTQ) hydrazone and azobenzene chiral dopants in the modulation of the helical pitch of the LC host, 5CB. The unique C3-symmetry of the TBTQ scaffold enhances the noncovalent interactions with the host and thus the chiral information transfer, resulting in helical twisting power (Ξ²) values as high as 147 ΞΌm–1. Notably, the TBTQ hydrazone exhibits an unusual deviation from trends observed so far in previous studies, resulting in larger Ξ² values for the Z isomer rather than the E one. Moreover, the overall Ξ² values for the hydrazone-based dopants are unexpectedly higher than those of the azobenzene dopants. These results indicate that the host/guest interactions are better when the photoswitchable chiral dopant is more rigid, as is the case with the H-bonded Z state of the hydrazone. The large Ξ² values and excellent miscibility of the hydrazone-based dopants in 5CB allowed us to design films that reflect visible structural color. The properties of the azobenzene-based dopants precluded their use in such applications. By codoping 5CB with hydrazone and azobenzene derivatives of opposite chirality, we demonstrated reversible handedness inversion upon photoswitching, providing a versatile soft material platform for reconfigurable photonic materials and colorimetric display technologies.

Latest @jacs.acspublications.org a collab with Mastalerz grp @uniheidelberg.bsky.social showing how C3-symmetric TBTQ core affects chiral induction in LCs. Hydrazone > azobenzene with this core. Mixing these two with opposite chirality allows handedness inversion bit.ly/4qAtvYE #openaccess #chemsky

13.02.2026 13:00 πŸ‘ 21 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0
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Molecular solar thermal energy storage in Dewar pyrimidone beyond 1.6 MJ/kg Storing sunlight in a compact and rechargeable form remains a central challenge for solar energy utilization. Molecular solar thermal (MOST) energy storage systems, which harness photon energy and rel...

Exciting chemsky work out First Release in @science.org from @gracegdhan.bsky.social and collaborators, scrunching up pyrimidones so tight with UV light that the strain release can boil water!

www.science.org/doi/10.1126/...

12.02.2026 19:34 πŸ‘ 29 πŸ” 12 πŸ’¬ 2 πŸ“Œ 1

I'm a Gallup pollster. You can contact them at galluppanel@gallupmail.com to let them know what you think of this.

11.02.2026 20:10 πŸ‘ 2424 πŸ” 1218 πŸ’¬ 86 πŸ“Œ 46

JD Vance visited the Armenian genocide memorial in Yerevan, accurately called it that in a post, then under orders from the Turks and the Heritage Foundation he deleted the post in two hours and replaced without the word β€œgenocide” - the fascist police states always line up.

#armeniangenocide

10.02.2026 19:25 πŸ‘ 53 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0

Genocidal Turkish petro-dictatorship Azerbaijan successfully got the Olympics to censor Armenia, the victim of its recent war crimes and ethnic cleansing #Artsakh

10.02.2026 04:55 πŸ‘ 95 πŸ” 19 πŸ’¬ 2 πŸ“Œ 0

😳

09.02.2026 11:12 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

#chemsky

07.02.2026 16:08 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

😳

05.02.2026 13:03 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

ICE at the polls! Bannon is basically yelling β€œfire” in a crowded theater here. His objective is to cause chaos (and suppress votes on the left). And it’s already working.

This threat works on multiple levels and doesn’t have to be β€œreal” to serve its purpose.

Let me explain & offer some advice.

04.02.2026 21:13 πŸ‘ 1972 πŸ” 884 πŸ’¬ 88 πŸ“Œ 96
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OrgΓ nica - Departament de Quimica InorgΓ nica i OrgΓ nica

#Barcelona folks: if you are free around noon tomorrow (Feb 6), I am giving a talk at @ub.edu at 12pm. Come say hi πŸ™‚ Details here: dqio.ub.edu/organica/ #chemsky

05.02.2026 11:26 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
SHOCKING FEDERAL COURT MOMENT: DOJ attorney Julie Le, "The system sucks, this job sucks" to Judge Jerry Blackwell who pressed her on why so many court orders are being ignored by ICE/Trump admin. She asked to be held in contempt just so she could get 24 hours of sleep. @FOX9

SHOCKING FEDERAL COURT MOMENT: DOJ attorney Julie Le, "The system sucks, this job sucks" to Judge Jerry Blackwell who pressed her on why so many court orders are being ignored by ICE/Trump admin. She asked to be held in contempt just so she could get 24 hours of sleep. @FOX9

This is unreal. An AUSA talking like that in open court is about as close as you can come to a total breakdown. Never heard of anything like it.

03.02.2026 20:46 πŸ‘ 11438 πŸ” 3339 πŸ’¬ 304 πŸ“Œ 868

Congrats Emilio!

03.02.2026 09:56 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Leading American companies β€” including Palantir, Deloitte, and private prison giant GEO Group β€” raked in over $22B from ICE and CBP contracts last year.

Do not forget who is profiting from cruelty and human suffering.

30.01.2026 20:00 πŸ‘ 9053 πŸ” 3955 πŸ’¬ 259 πŸ“Œ 181
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How AI assistance impacts the formation of coding skills Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.

The latest from Anthropic: using Anthropic's products makes you worse at your job

30.01.2026 22:42 πŸ‘ 421 πŸ” 126 πŸ’¬ 18 πŸ“Œ 49