Ivan Aprahamian
@aprahamian
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Professor @Dartmouth , Chair @DartmouthChem . Into tiny switches and machines
Hanover, NH
Joined July 2012
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Pinned Tweet
In
@ScienceMagazine
today is
@shaobaqian
& Heyifei's
@dartmouth
report on a photoswitchable anion pump that actively transports Cl- against a concentration gradient. The pump's operation transports the Cl- a distance equiv to 65,000 football fields! 1/5
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After a 10 year incubation period I am happy to have finally bloomed into a Full Professor :) A shout out to all my co-workers past and present for their enormous contribution to this wonderful journey, and thanks to my mentors and community for all the support
#realtimechem
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429
Latest from the group
@J_A_C_S
shows a 1,2BF2 shift in an BF2-azo switch, resulting in a BODIHY fluorophore. Inspired by leaves that change color in the fall we used the temp and light responsiveness to design multichromatic PDMS clovers 1/2
#realtimechem
8
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282
I have an opening in my group for a postdoctoral researcher to work on reaction cascades and feedback loops (). Expertise in supramolecular and systems chemistry is required. Plz RT
#realtimechem
#chempostdoc
#BlackInChem
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Newest from group
@J_A_C_S
explores the subtle interactions between photoswitchable chiral dopants and liquid crystal hosts, and how they can be manipulated to reflect and lock-in visible to NIR light (range of +1500 nm). Congratulations to Brandon!
10
30
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Come join our team at
@dartmouthchem
! There are a number of postdoc positions available in the areas of systems chemistry, adaptive (liquid-crystalline) materials, nanoscopy and automated materials discovery. RTs are appreciated
#realtimechem
#chemjobs
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As an Armenian from Jerusalem, the death of innocent people over the past few weeks in
#arstakh
and now Israel/Palestine has just been overwhelming.
5
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Just received my free copy of the molecular photoswitches book edited by
@pianowskilab
This is such a great resource for anyone interested in learning about the state of the art in the field. Thank you
@Wiley_VCH
@Wiley_Chemistry
#RealTimeChem
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Our collaborative paper with
@GraceGDHan
@ChemicalScience
which was already a
#HotPaper
and
#PickOfWeek
is one of 2023 most popular energy & environmental chemistry articles! Congrats to all
@QingkaiQ
and Qianfeng
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10
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In collab with
@BeerenLab
we show
@Chem_CP
the use of a photoremovable hydrazone template in the enzymatic synthesis of g-CD, thus eliminating the energy consuming steam distillation process used in industry that drastically increases g-CD production costs
6
20
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Very excited about this new
@J_A_C_S
paper in collaboration with the marvellous
@Natha_tweet
We tackled a big issue in photo-actuations of polymers - how to deform in stages and adopt multiple shapes - using bistable hydrazones
#realtimechem
#openaccess
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Just out
@J_A_C_S
a switching cascade involving metal and proton relays. Kudos to Heyifei Fu for cracking this project that
@chemsusnata
started years ago
#realtimechem
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21
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5 years ago today a few of us were minding our business and having drinks at
@GrandHotelSthlm
when these 3 characters showed up. Then it turned into a champagne, royalty, ambassadors, more champagne, me pretending to be
@JLsessler
, a small ceremony, and after party, party :)
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4
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Congrats
@Hai_Qian
@shaobaqian
and collaborators for latest in
@J_A_C_S
showing how the ON/OFF emission toggling of a bistable photochromic hydrazone can ocur in solution (incl serum) and solid state, using 1- and 2-photon excitation
#realtimechem
5
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Enjoyed working on this
@ACSCentSci
Got to include
@aiww
, put
@sirfrasersays
@FeringaLab
& Sauvage on a bike, talk about pet peeves (reactants≠fuels), find a mistake
@CambridgeWords
.. Thanks to
@NSF
@AvHStiftung
for $ and
@Ella_Maru
for gif
#rscposter
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Instead of celebrating my dad's 80th birthday this weekend, we are mourning his loss. Dad's dementia started about a decade ago, and he was in a coma for the past 4 years. I know that at least now he is resting in peace. You will be dearly missed dad..
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Congrats to
@SirunYang
Jared, Laura & collabs
@APriimagi
& Gaurav for
@J_A_C_S
paper showing how switching of hydrazone pendants results in photo-hardening. We also used the switch bistability to lock-in different Tg values in same polymer
#RealTimeChem
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7
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Not working on anything even remotely related to
#COVID19
I am not itching to open my labs anytime soon. We 1st need proper and accurate testing. My priority now is my student's
#mentalhealth
while in self-isolation. Any advice in this respect would be appreciated
#RealTimeChem
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In this collaborative work
@J_A_C_S
with the Zenobi group
@ETH_DCHAB
we elaborate on the photo-switching of hydrazone SAMs on different metals (Au, Ag, Cu) using TERS. The isomerization is accelerated on the surface but still 1 of longest for photochromics
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Our 3D volumetric display is now out in
@Chem_CP
Congrats to
@QingkaiQ
and our collaborators
@lippertlab
who made this cool application of photoswitches possible. The paper is for dog and cat lovers alike :) And yes that is a cat walking in a polymer 1/2
9
22
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Our photo-removable hydrazone-templated enzymatic synthesis of gamma-cyclodextrin
@Chem_CP
is getting more love! Thanks to
@JTDurrani
for the write-up and congrats again to the team
@sirun
@BeerenLab
@PelleMierkeLab
@larsenbagvendt
#realtimechem
A team of researchers in Denmark and the US have developed a light-controlled synthesis of the eight-glucose γ-cyclodextrin
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Our latest (& last pandemic) review in the Journal of Physical Organic Chemistry
@Wiley_Chemistry
is about BF2-hydrazone fluorescent rotors (BODIHYs) and how they can be applied in
#AIE
related applications Congratulations
@ANBismillah
#realtimechem
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I am looking for a postdoctoral scholar with training in supramolecular chemistry to work on molecular-switch-mediated reaction cascades
#chemjobs
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@sgoldup
& I wrote a thing about how catalytic systems, molecular motors and supramolecular materials can be maintained in a non-equilibrium steady states
#realtimechem
1/3
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Excellent
#tenure
talk
@DartmouthChem
@dartmouth
by my wonderful colleague
@KMirica
! Congrats to Kat and all the Mirica group members for their outstanding achievements
#RealTimeChem
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I like it that more and more journals/editors are informing reviewers about their final decision about manuscripts. I learn a lot from reading the other reviews as it allows me to gauge mine
#RealTimeChem
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Congrats to Quan Li
@Hai_Qian
&
@shaobaqian
on their latest
@J_A_C_S
paper showing how strain in large macrocycles (yes yes large not small!) can be used in accelerating the isomerization rate of bistable hydrazones
#RealTimeChem
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If
@POTUS
utters the word
#Genocide
tomorrow (and it is an if, until it happens) we should immediately turn our attention to the Armenians in Istanbul and Turkey who are already living under very precarious conditions
#NeverAgain
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Just realized that this publication from 2009 is about chemically fueled, out-of-equilibrium and dissipative switching. Only if I knew about the magic of chemical fuels back in 2009 🙄
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Latest is a collaboration with the
@LabZenobi
@ETH_DCHAB
&
@JinggangLan
@UZH_en
Congrats to all especially to Liqing and
@SirunYang
who did the heavy lifting. The paper is part of a special issue in celebration of
@sirfrasersays
upcoming 80th birthday
5
13
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Congrats to
@hargrovelab
@DukeChemistry
for receiving the 2021 Cram Lehn Pedersen Prize in Supramolecular Chemistry
@ismsc2022
#ismsc2022
#realtimechem
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A wonderful collaboration
@J_A_C_S
with the
@GraceGDHan
group
@BrandeisScience
. Congrats to Qianfeng and Sirun
@dartmouth
who did the heavy lifting
#RealTimeChem
Our collaboration with the amazing
@aprahamian
group
@DartmouthChem
shows the photon energy storage in hydrazone
#photoswitches
! Proud to report a new class of
#molecular_solar_thermal
☀️compounds in
@J_A_C_S
@BrandeisScience
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Congrats to
@Mark_J_Moran
for his paper in
@J_A_C_S
showing how to induce a phase transition (cholesteric to smecticA*) in a liquid crystal using a hydrazone photoswitch, allowing for a photogated window application (see paper :))
#RealTimeChem
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First attempt at making choreg (armenian easter bread ) and baking in general. Not too shabby
#HappyEaster
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Every year this tree extends the
#Foliage
season by weeks and every time it is just a
#WorkofArt
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The latest from
@ANBismillah
is a review about the up-and-coming class of fluorophores called BOPHY
@ChemSocRev
#RealTimeChem
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Thanks to all the speakers, discussion leaders, poster presenters, attendees and funders for the wonderful
#switchGRC
week!
@sgoldup
and I can now have some rest, especially knowing that the next iteration of the conference is in good hands
#realtimechem
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Our perspective about new molecular switch architectures is out
@PNASNews
It will be part of a special issue on artificial molecular machines edited by
@sirfrasersays
Great job
@Mark_J_Moran
and Jared Harris!
#RealTimeChem
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A nice brisk morning in Eugene. Looking forward to seeing friends in person again at
#ISMSC2022
@ismsc2022
and the kickoff later on today by no other than
@ChenfengKe
@DartmouthChem
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An excellent perspective
@ChemicalScience
about
#Aromaticity
by many great contributors (too many to tag). Great replacement for Schleyer's "What is Aromaticity?" () when illustrating the ambiguity of this term to orgo students
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Writing with lasers: researchers report a goldielocks
#photochromic
compound. Read more at
#CENChemPics
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@sgoldup
and I wrote a thing about non-equilibrium steady states in catalysis, molecular machines and materials. It's a big topic at the moment and we wanted to bring together some of the concepts that are common in these related fields:
#RealTimeChem
🧵
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12
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104 years ago my paternal grandmother (an Assyrian) while on a death march was snatched from her family by Turkish gendarmerie and sold as a slave to a Kurdish family. If this sounds familiar (
#yazidis
) it is because impunity begets repetition
#neveragain
#armeniangenocide
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Check how Baihao used hydrazone emission toggling and switching in tracking where when and how much drug is released from nanocarriers
#ISMSC2020
#ISMSCPOSTER
#ISMSCPoster
So excited to share my recent work
@ISMSC2020
, where we use an emissive hydrazone switch to "simultaneously" visualize the nanocarriers while controlling drug release. Original paper
@ChemicalScience
. Feel free to leave comments!
#nanomat7
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To all my ZOOM University colleagues, any interest in guest lecturing in the
#supramolecular
chemistry course I will be teaching soon? Trying to turn a lemon into lemonade
@SupraMolChem
#RealTimeChem
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12
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An elegant and wonderful work by
@SyuzannaHaruty7
@Nature
showing how oscillating systems can be designed using simple organic molecules.
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Journal: we cannot recognize this password, please try again or change password
me: ok, I will change password for nth time
Journal: you cannot change it to the previous password that we just told you we do not recognize
me: 🤔🙄
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Congrats Ben
@FeringaLab
In recognition of his contributions to synthetic and physical organic chemistry, Ben L. Feringa of
@univgroningen
is being inducted into the National Academy of Sciences.
Watch the
#NAS159
livestream:
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@gcaravagna
My first paper was triaged/rejected by
@angew_chem
and I was frustrated. After talking with
@amar_flood
(this is why you need a support system) I revised the introduction to better emphasize the importance of the findings, then it was accepted in
@J_A_C_S
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It only took a pandemic to finally get to it :)
Check out the group's new website, now with correct spelling -
#RealTimeChem
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Our review Boron difluoride hydrazone (BODIHY) complexes is officially out and now as a cover. Congrats again to
@ANBismillah
and thanks to
@TykwinskiGroup
for help with the cover!
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Latest from the group looks into the effect of pH on hydrazone-based photo-switches. The paper is part of a special issue in
@ChemPhotoChem
(edited by Dube, Tamaoki and I) on light-activated switches and machines.
pH-induced fluorescence and thermal relaxation rate modulation in a hydrazone
#photoswitch
(
@Aprahamian
,
@shaobaqian
@DartmouthChem
)
0
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Inspired by
@JahanDawlaty
@usc
we decided to waive the application fee to our chemistry graduate program
@dartmouth
! Come join me
@ChenfengKe
@KMirica
@jimmywuchemist
@glueckd
@RagusaLab
and other colleagues
@DartmouthChem
Please RT and spread the word
#RealTimeChem
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Some baking this morning to distract myself from all that is happening. I even tried making baguettes for first time. Needs some more tweaking :)
#sourdoughbread
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Huge Congratulations
@ardemp
!! On top of everything first Armenian American to get the Prize
BREAKING NEWS:
The 2021
#NobelPrize
in Physiology or Medicine has been awarded jointly to David Julius and Ardem Patapoutian “for their discoveries of receptors for temperature and touch.”
288
10K
20K
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There are ethnic Armenians dying to defend Ukraine. There are ethnic Armenians serving in Ukranian government such as
@_Akopyan_Meri
, and instead of showing some empathy to 120K Armenians who are held hostages by
@Azerbaijan
this advisor to
@ZelenskyyUa
is worried about attention
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Check out
@shaobaqian
's perspective in
@Chem_CP
on the development of hydrazones as chemically and photochemcially activated switches
#RealTimeChem
0
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1 year on, it's great to see the Perspective with
@sgoldup
has been useful, judging by citations and downloads at least! 😀 It triggered useful discussions around semantics but this really wasn't the main point! What counts.. 1/2
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10
54
Thanks to
@dartmouthartsci
@dartmouth
for this great write-up about our anion pump paper
"A Filtration System Powered by Synthetic Molecules and Light"
In
@ScienceMagazine
today is
@shaobaqian
& Heyifei's
@dartmouth
report on a photoswitchable anion pump that actively transports Cl- against a concentration gradient. The pump's operation transports the Cl- a distance equiv to 65,000 football fields! 1/5
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1
7
55
The latest from the group
@ChemicalScience
is a collaborative effort showing how hydrazone switching and emission toggling can be used in tracking where, and assessing how much drug is being delivered by nanoparticles in cells
1
4
55
First entry of hydrazone (photo)switches into framework materials courtesy of this beautiful collaborative work with
@ChenfengKe
group. Congrats to all incl
@shaobaqian
#VIP
@angew_chem
#RealTimeChem
Our recent development of HcOF-101 featuring a 1.4 nm pore
@angew_chem
. Constructed through heteromeric carboxylic acid dimerization and SCSC. It includes a hydrazone photoswitch made by
@aprahamian
, allowing for solid-state fluorescent patterning.
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@Tom_deWaal
And here is the
#AllLivesMatter
moment we have been waiting for from the historian who thinks that the
#ArmenianGenocide
and Assyrian Genocides happened between 1915-1916🙄Imagine talking about the
#Holocaust
and in same breath say that Nazis also died in huge numbers
#ShameOnYou
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"What's your name?"
"Ivan"
"Yvonne?"
"No. Ee' van"
"How do you spell it?
"I V A N"
"Oh Eye-Van"
"No. Ivanka, without the ka"
"Why did you have to bring Her up?"
"Just give me the damn coffee already."
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1
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A great collaboration with
@ShustovaLab
showing how the nature of the void in MOFs and COFs affects the photo-switching of hydrazones. Congrats to all involved especially
@GraceThaggard
and Daniil
#realtimechem
Confinement-Driven Photophysics in Hydrazone-Based Hierarchical Materials (Shustova)
@ShustovaLab
#AngewandteVIP
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Great few days in
#Dilijan
The hikes were the cream on top. Thanks to
@hike_armenia
for keeping me on track!
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@YesVicken
@Tom_deWaal
#TimTheTool
got his number from no other than disgraced revisionist historian and
#ArmenianGenocide
denier Justin McCarthy
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5
45
Great contribution by
@shaobaqian
to the special issue
@ChemistryOpen
dedicated to Jean-Marie Lehn's 80th birthday
#realtimechem
Have you tried untwisting hydrazone photoswitches? The group of Ivan Aprahamian
@Aprahamian
@Dartmouth
explains what happen in their Communication
#OpenCollections
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An editor is taunting me for being late in sending my review of a revised paper that I never agreed to re-review in first place 🙄 the more emails I get the further down it gets on my to do list
#realtimechem
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Paper accepted, and a speeding ticket in Montreal. Not a bad start of the day
Now off to one of my favorite countries for
#isna18
Looking forward for all the aromatics
#realtimechem
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If you are at
#ACSOrlando
tomorrow (Tuesday) chekout the syposium on "Artificial Molecular Machines" organized by the graduate students
@LSU
@LSUGSSPC
They did an excellent job organizing it and putting a stellar lineup (minus me that is :)) in place
#RealTimeChem
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My first try at smoking brisket (flat)! Pretty happy with my
@Masterbuilt
gravity 560 (
#gravity560
) pit :)
#ChemistsWhoCook
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My podcast about
#MolecularMachines
with
#AllThingsPhotonics
@photonicsmatt
& Jake Saltzman
@PhotonicsMedia
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9
45
Very sad news and a huge loss
S hlubokým zármutkem oznamujeme, že ve věku 85 let dnes zemřel významný český chemik a vědecká osobnost světového významu prof. Josef Michl. V
@IOCBPrague
vedl vědeckou skupinu zaměřenou na organickou chemii, současně od roku 1991 do své smrti působil na
@cuboulder
.
"Byl to
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Great hike up Cardigan Mountain with
@wegnerlabs
who is visiting
@dartmouth
@DartmouthChem
as a Harris visiting professor
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Dartmouth Society Fellows application deadline is Sept 13. If you are interested in applying for this prestigious and highly competitive postdoctoral fellowship ($55K stipend for 3 years plus other benefits) send me an email
#chempostdoc
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Had a great time hosting
@christhechang
as our 2021 Ross Lecturer. Enjoyed learning about how metals are involved in energy applications, improving sleep and reducing fat, and how to develop activity based sensors (check the
@angew_chem
review). It was a symphony of elements :)
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What a great Telluride workshop! Kudos to
@GraceGDHan
@s_wezenberg
and Jirka for organizing such a spectacular meeting. It was special :)
Amazing moment at Telluride Science Workshop
#TSRC
#Telluride
#Molecular_Rotors_Motors_Switches
!!
Appreciate to “Telluride-responsive"community
@FeringaLab
,
@aprahamian
,
@GaribayLab
,
@amar_flood
,
@FuchterMatt
,
@ShustovaLab
,
@GraceGDHan
!
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Our first submission to
@chemRxiv
is online! It summarizes a thorough strucutre property analysis of the bistable hydrazone photoswitches recenlty developed in the group. Great work by
@shaobaqian
and
@Hai_Qian
#RealTimeChem
Structure Property Analysis of the Solution and Solid-State Properties of Bistable Photochromic Hydrazones by Ivan Aprahamian (
@aprahamian
) & co-workers
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Just in case anyone is wondering why the
#ArmenianGenocide
trauma has never healed.
An Aliyev regime affiliate blockading Nagorno-Karabakh says “we will slaughter an Armenian & add his blood to kebob” for Nowruz holiday. He thinks he is funny. He is def. more honest about the blockade’s end goal than the fake student environmentalists.
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It was great to catch-up with old friends and make new ones this week at
#isna18
. There was also a lot of good food to be had at Sapporo
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The conformation of a structurally simple hydrazone determines whether or not it will emit white-light. Congrats to
@shaobaqian
and collaborators for latest in
@ChemCommun
Will now try squeeze it into
#isna19
talk :)
#RealTimeChem
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Supramolecular chemistry did well in 2020
Meet C&EN's 2020 Molecules of the Year! These might be our editors' picks, but you can vote for your favorite molecule too. Read about the molecules that made it and cast your vote here:
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Seems the cat is out of the bag - excited to be joining the Advisroy Borad of
@Chem_CP
and contributing to the advancement of this great journal. Congrats to
@organomimetic
@CoskunLab
@OmarFarha5
and other new members as well
#RealTimeChem
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So happy/excited for my kickass colleagues
@ChenfengKe
and
@KMirica
for this well deserved recognition. Looking forward to all the great things they will do with the award
@dartmouth
and
@DartmouthChem
. Congrats to
@denniscao
and the rest of winners as well!
#RealTimeChem
RCSA Announces 2019 Cottrell Scholars
Research Corporation for Science Advancement announces its 2019 Cottrell Scholar Awards. These Awards provide $100,000 to each recipient identified as a leader in integrating science teaching and research at a top...
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