Joshua Barham
@joshpbarham
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Joined February 2016
🚨Simple neutral acridines work as N-centered radical d-HAT photocats!💡🔄engaging C-H bonds of even light alkanes! vs scarce examples of (ionic) NCR PCs, we report a general platform incl. 2-/3-component rxns, heterofuncs, & dual catalysis w/ Ni & Cu🤝 👇 https://t.co/uRboF8amn8
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Just out in @angew_chem: a thorough look at an isolated acridinyl radical and its conPET-type photochem., with an emphasis on understanding how SET takes place. (Dynamic quenching? Preassembly? Solvated electrons?) Thanks to collaborators @RCNSTheoChem! https://t.co/kJ5j7gdDOb
onlinelibrary.wiley.com
In this paper, we isolate the reduced form of a commonly used acridinium photocatalyst (acridinyl, Acr•) and investigate its photochemistry using transient absorption, analysed alongside TD-DFT...
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Our collaborative work with TD Chung group on photoelectrode-mediated radical-radical coupling has now been up in @ChemicalScience!! Big congrats to all related, especially for our visiting student Sunghwan! https://t.co/syyQ6w7nUQ
pubs.rsc.org
The selection of electrode material is a critical factor that determines the selectivity of electrochemical organic reactions. However, the fundamental principles governing this relationship are...
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Is the #photoredox cat. you add to the rxn really the active cat.?🤔We report how DicyanoAcridones are precats to record-breaking acridinium super-photooxidants (E ~3 V)💥that oxidize even ArCl&ArF in #photoelectrochemical rxns💡🔋 Out now in @angew_chem🎉 https://t.co/rwBtdC0GCg
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Very excited to announce that the new group webpage @uni_regensburg is now live at https://t.co/dVMA0pA5DV. If you are interested in our #maingroup research please visit. We will also be #recruiting for a #chemPhD position. official announcement in due course. #chemTwitter #newPI
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Congratulations to Shahboz & team for this excellent, comprehensive & disruptive work that could make a substantial impact on EnT photochemistry & remote fluorination reactions! 👌🎉💡
Want to C-H Fluorinate a complex molecule? Simply add a benzoyl & turn on the💡😎 In air, gram scale, amenable to free OH/NH compounds, >5 APIs, ionic liqs. Benzoyl directs regio- as a user-installed handle. Allows [2+2]s in air. Now in @ChemicalScience
https://t.co/6PJbzZ76o6 🎉
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Now in @OPRD_ACS, an auto-frequency tunable single mode microwave cavity enables the highly productive #continuousflow synthesis of a diversity of imidazolium #ionicliquids, up to 600 g/h & 62.5 kg/h /L (STY). From @BarhamLab https://t.co/EpDXs0fqiv
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1st @OPRD_ACS ! By a #microwave & #flowchemistry synergy📡🤝🌀with solid-state oscillator tech. (cf. mobile telecomms📶) we synthesized #ionic liquids in record productivities & S.T.Y. 20 examples, simple workup/filter for >99% purity. Congrats Michal!🎉👏 https://t.co/SHYk489Rvv
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Chuffed to be recognized by the @EuChemS special sponsor award!✨ Alongside a number of great young scientists🙏 Thanks EYCheM 2022 for the kind invitation to present, and to showcase the emerging #photoelectrochemistry #synthesis field! #award #photocatalysis #organoEchem
And finally, closing this successful edition of the @EyM2022 with a special thanks to our sponsors, and congratulations to our special sponsor award winners! 🏆👏🏼
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Review: Synthetic Molecular #Photoelectrochemistry: New Frontiers in Synthetic Applications, Mechanistic Insights and Scalability @joshpbarham @BarhamLab #openaccess thanks to #projektDEAL
https://t.co/mgVdC4nhag
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Thanks @ChemicalScience for promoting Mark&co.'s work! Geared up to share it, & other work from our team at Corning's webinar series! Join us next Tue @ 2pm to learn how we used #flowchemistry to make high energy #photochemistry scalable, safe & green💡♻️ https://t.co/sc4UQlPA9r
Don't miss our new article from Joshua P. Barham (@BarhamLab) et al. ✨🤯 An organophotocatalytic late-stage N–CH3 oxidation of trialkylamines to N-formamides with O2 in continuous flow 🔗 https://t.co/JGqoFHNWBt
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Our collaborative cat-free heterocyclic photocyclopropanation w/ @reiser_group featured as the outside front cover of Green Chem.!🎉😍Thanks @green_rsc !🙏 Toxic, explosive diazos tamed-in a sustainable, safe, scalable process w/ biodegradable solvent!👇 https://t.co/QF9UIyBuSS
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Are you an organic synthetic chemist, doing #photocatalysis, #organoEchem or #photoelectrochemistry? Oh boy, have we got something for you. Check out all this fresh content in the group's latest review!💥Excellent job by @ChemShangzeWu, Jas, Tobi and Xianhai! #proudsupervisor😊
Interested in Synth. PhotoEChem?🔋💡 An💥of reports since 2019 spurred us to offer an updated, comprehensive review filled w/ new✨content incl. reactivity🧪, mech. insights🔍&scale-up to multi-g's🚰! Check it👇@angew_chem Congrats to @ChemShangzeWu &team! https://t.co/oeCjyIWKGc
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Electro-mediated #PhotoredoxCatalysis for Selective C(sp3)-O Cleavages of Phosphinated Alcohols to Carbanions (Barham) @BarhamLab @ChemistryKoenig @ShahbozYakubov @XianhaiT #openaccess thanks to #projektDEAL
https://t.co/D9i4QyJfA7
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Knife-edge final to Euros, congrats to #Italy 🇮🇹 for being the right side of the penalty shootout knife!👏turbulent year for both countries, huge credit to the teams🇮🇹🏴 for bringing such joy&hope all the way. Fans aside- big respect #Southgate&team #England for their conduct✨😊
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Beyond C(sp2)-X cleavage/aryl radicals: We report #photoEchem💡🔋C(sp3)-O reductive cleavage of phosphinated alcohols (-2.7 V) to carbanions in olefination/deox rxns. https://t.co/qwZDBSINxf Aryl halides untouched! Preassembly is 'key'🗝️; shifts reactive site&assists C-O cleavage
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The Joint Committee on Vaccination and Immunisation (JCVI) has issued advice to the UK government on the use of the #COVID19 Oxford/AstraZeneca vaccine for people aged under 40. Read more here:
gov.uk
The Joint Committee on Vaccination and Immunisation (JCVI) has issued advice to the UK government on the use of the coronavirus (COVID-19) Oxford/AstraZeneca vaccine for people aged under 40.
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Photoelectrochemical C-N bond formations with novel, tunable triarylamines that engage substrates via dispersion precomplexation, hot off the press!🗞️✨ WARNING ⚠️*topics presented (contra-redox potential, contra-Kasha rule) are highly controversial - proceed with caution*⚠️ 😎👇
Introducing triarylamines, tunable #electrochem⚡️activated photocats for super-oxidations. We discovered pi-stacking precomplexation 1) rationalizes photochem💡of ps-lived⏱️*[radical ions] & 2) harnesses full power of vis. photons by anti-Kasha #photochem!
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"Visible‐Light‐Induced Homolysis of Earth‐Abundant Metal‐Substrate Complexes: A Complementary Activation Strategy in Photoredox Catalysis". We would love to hear your opinion about this concept, which has led to exciting chemistry. https://t.co/azuQbW46nF
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Delighted to share our photocat-free #photochem amide C-H arylation💡✨from Jaspreet's MSc Thesis🎉🎊Mech. studies imply EDA complex & further rxns in a "solvent cage". We're *excited*🤩 for opportunities of preassembly in photocatalysis! Check it in @JOC_OL!👇👇👇 #womeninSTEM
Caged up but not chained up: Arenes form EDA complexes with persulfate in a solvent cage giving rise to a photocatalyst-free C(sp3)-H arylation of amides. Check it out in #OL
https://t.co/cflN50dbkV
@BarhamLab @JCFRegensburg
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