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from people who already read cbc my favorites are carbon based condoms and is my nasal hair large enough posted by ψ ψ at 8 37 00 pm 13 comments labels google 10 19 2007 friday potpourri just a few things to sate your appetite for the ol cbc this weekend james watson as it turns out is a complete prick shocking given his treatment of rosalind franklin in the double helix frankly nothing that comes out of this man s mouth surprises me he s always had a lack of tact the concept of race is a purely socioeconomic one which has a long sordid awful history in this country no amount of science is going to fix that if watson has his way such science would only make things worse i think this is a point worth repeating there are some things that science can t fix race discrimination is undoubtedly one of those things roger kornberg does chemistry who knew epic lulz in an incredible paper that came out in science this week the kornberg group isolated and got a crystal structure of a gold nanoparticle with 102 au atoms capped by 58 mercaptobenzoic acid ligands given the difficulty of generating sufficiently monodisperse nanoparticles to even make crysals this is quite an achievement a great read thanks to anonymous for the tip whoever you are another cool paper from advanced materials aka that one journal with the awesome research and no supporting information the japanese have succeeded in fabricating a gel that walks on its own using metal redox chemistry and no biologicals i for one submit to our walking jelly overlords which i suspect will take over japan and soon the world in the next twenty years in the yet another paper on carbon nanotubes department a nano letters paper from the burke group at uci where they made a carbon nanotube radio the nanotube acts as the am demodulator of the radio source and they even made a video demonstrating how it works with those newfangled ipods all the kids have nowadays the music choice is pretty dumb it was like muzak or something why not some real music but the concept is cool edit the video is on youtube woot and finally in the self congatulatory deparment an article in this week s science about this year s nobel prize in chemistry going to gerhard ertl has the following quip in an earlier phone interview with science ertl was quick to offer credit to fellow researchers his field he says was propelled by the parallel development of many surface characterization techniques and he adds many scientists were adept at applying them including gabor somorjai of the university of california berkeley with whom he shared the 1998 wolf prize in chemistry for their work in surface science i was a little bit disappointed he didn t share the nobel prize with me ertl says last week several chemistry bloggers went further arguing that somorjai deserved recognition for his vital role in laying the foundations of surface science so basically 1 gerhard ertl is a nice guy 2 ertl also thinks somorjai should have won 3 apparently the chemblagosphere whined loud enough about this that science took notice and felt it necessary to add that last part in i feel partly responsible yay me there that should keep you occupied for the weekend see you monday posted by excimer at 9 59 00 pm 11 comments labels announcements cool papers random 10 18 2007 change of plans no content post i was planning to post some beautiful red crystals that finished growing after two weeks of resisting the temptation to look at them every five minutes you would have liked them they were fibrous and tangled and somewhat reminiscent of hair some are shorter and more blocky and look like they will diffract very well unfortunately i don t have them anymore and unless some nice people at nist want to take a shot of them once they arrive you ll never see them sorry posted by ψ ψ at 11 21 00 pm 4 comments labels xtals 10 15 2007 a mighty inorganic kablooie you couldn t pay me enough money to work with polyazides that s pretty much the bottom line for me for some reason though these potential molecular bombs have attracted a lot of interest lately the total synthesis of tetraazidomethane was finally completed earlier this year and the synthesis of the complex ti n 3 4 among other metal polyazides was completed a few years back fresh off the heels of their previous successes with metal azide complexes those crazy sons of bitches at the christe group have published the synthesis of more bombs this time with selenium the lame se n 3 4 the much more awesome se n 3 5 and the chuck norris special se n 3 6 2 that s right kids six azide groups on one atom six six that s a lotta firepower in one molecule actually as it turns out the pentaazido and hexazido compounds which are anionic are more stable than the neutral tetrazido species but they re still not that stable surprisingly they were able to obtain a crystal structure for the hexaazide badass and as one would expect these nanobombs decompose readily at room temperature via the following pathway ph 4 p 2 se n 3 6 2 ph 4 p n 3 se n 2 a giant fucking explosion while i m sure there is always great interest in the inorganic community to study the structure and reactivity of new inorganic complexes i draw the line at ten feet where the compound even in small quantities has enough force to kill me from ten feet with shrapnel or whatnot this leads me to propose the following transformation this work will not be continued and i wish to reserve the field for myself yes it s a total synthesis suck it explosion only subtlely reported read between the lines or just read the safety precautions section which takes up a sizable chunk of the experimental section posted by excimer at 1 37 00 pm 18 comments labels cool papers 10 13 2007 goodnight moon goodnight sun goodnight calix 6 arene if you re into molecular machines and who isn t then you might get a kick out of this recent jacs paper the rest of you who could care less will at least like their graphical abstract cuuuute look at that happy sun and that content moon and what the hell is that red thing and blue thing with the blue tail and it s going in what now vigilant cbc readers are probably thinking oh god not this shit again he s probably gonna call it a nanotampon or something isn t he well that s where you re wrong i m not going to stoop to your pedestrian humor cause i m a classy guy perish the thought that i would ever sink so low as to use bodily humor to illustrate the diverse and fascinating chemistry of rotaxanes which is exactly what this system is and is activated in the presence of light by a photoacid anyway the nanotampon dammit is a simple monoalkylated 4 4 bipyridinium with one basic site the um nano ah fuck it it s a calix 6 arene 1 now as it turns out the protonated bipyridinium forms a nice pseudorotaxane with the calixarene so the authors decided to use a merocyanine photoacid to turn the rotaxane assembly and disassembly into a process that can be switched on and off with light photoacids are simply molecules that when exposed to light release a proton this merocyanine spiropyran system is a photoacid so upon release of that proton in the presence of light the bipyridinium is protonated and the pseudorotaxane is formed put it in the dark and the system slowly 7 days for full conversion disassembles and unlike real tampons the process is completely reversible 2 one can debate the usefulness of molecular machines i frankly don t see any real use for this thing but c mon cuuuuuuuute graphical abstract and i think photoacids are awesome i wish more papers had happy suns 1 god i am so glad the authors used the default chemdraw template for calixarenes here seriously 2 i deeply apologize for that gross remark posted by excimer at 8 20 00 pm 8 comments labels cool papers photochemistry supramolecular 10 11 2007 glowy byproduct this is discarded junk from a successful reaction one of the postdocs was looking over my shoulder while i worked it up and asked why it looked a little green the product after all is red as a solid and orange in solution i grabbed the tlc lamp to check for fluorescence and bam aqua cool posted by ψ ψ at 10 10 00 pm 8 comments labels pretty colors 10 10 2007 it takes some serious talent to screw this up i will never really understand why people bother to buy tetrakis triphenylphosphine palladium 0 on any given day it s definitely the easiest reaction i do and it always works on a bad day the bright yellow crystals are enough to make me feel a little better also palladium catalysis is magic apparently it doesn t ship well and might show up in funny colors unless maybe you get it from strem it only takes about half an hour excimer asked me a long time ago to post the procedure i use to make this and i m finally getting around to it one of my labmates googled this a while back and it s never failed us it also has the advantage of being free usually i work on about a hundredth of their scale which still works well enough i ll maybe never have an excuse to make over 100 grams of the stuff store under nitrogen and in the dark it s ready for whatever coupling reaction you want to throw it into this batch is going toward a sonogashira and a stille posted by ψ ψ at 12 06 00 am 19 comments labels experiments that actually work pretty colors synthesis 10 08 2007 nobody cares who i think should get a nobel edit gerhard ertl won the prize for chemsitry this year well deserved on his part and i m glad surface chemistry is being recognized this year but the fact that somorjai and whitesides didn t win is in my professional opinion tarded oh well like kyle said the nobel is a silly thing anyway first off suck it bush suck it long and suck it hard i say that a lot but why this time because pioneering work in embryonic stem cell research and its impact on gene therapy was awarded with a nobel prize in medicine today bush s veto of the embryonic stem cell research bill last year and today s nobel announcement further illustrates the divide between scientific progress and the bush administration s policies while the nobel was for research on mice and the ban on human stem cells the announcement still shows the importance of stem cells in gene research anyway they re announcing the nobel prize in chemistry on wednesday which means it s time for speculation one can debate the usefulness of such speculation ok whatever it s a worthless waste of time but it sure is fun i m not banking on a prize in materials chemistry or organic chemistry based on the chemistry selection committee a hodgepodge of p chemists and biologists with umlauts in their names however most of the work i do and the work of many people who do work on novel materials is centered around the truly pioneering work of three chemists who in my opinion and after five minutes of discusion with ψ ψ her opinion as well are highly deserving of the nobel prize this is meant on no way to predict who the winner will be on wednesday i am neither swedish nor broadly knowledgeable in all areas of chemistry especially the molecular biology aspects but go here if you wanna place your bets george whitesides and ralph nuzzo i call whitesides the world s smartest chromedome he might object to that but i have yet to find evidence to the contrary if they do get the nobel it will be for their research on self assembled monolayers that paper according to web of science has been cited over 2 100 times however whitesides has been a pioneer in nearly everything he s had his hand in from his early work on c h activation in metals to soft lithography to more recently multi ligand interactions in enzymes well i thought it was neat but his work on self assembled monolayers is nobel worthy it s had a large impact on the miniaturization of electronic devices as well as simply being a simple method for creating ordered monolayers on conductive substrates another pioneer in surface chemistry has been gabor somorjai whose work on studying surface metal metal interactions and metal organic interactions on the atomic level has also had a huge impact on surface chemistry richard heck heck s work needs no introduction to organic chemists most noted for the reaction that bears his name heck s work on palladium catalysis preceded pretty much everyone else s at the time the suzuki reaction heck s work set the stage for that the sonogashira reaction heck did it first without the copper seeing as both academia and industry have benefitted from palladium catalyzed organic reactions heck certainly deserves a nobel for this early work that led to some of the most important reactions of the late 20th century metathesis was honored two years ago which while important hasn t had half the impact palladium has plus heck s getting up there in age so they need to get it to him quickly so that s what i think in my professional opinion neither of them will win the nobel and it ll be given to people whose research i don t really care about i has an idea lets give it to another biologists lol posted by excimer at 10 13 00 am 32 comments labels announcements random older posts home subscribe to posts atom carbon based curiosities you should click me contributors excimer ψ ψ labels random 46 cool papers 34 announcements 31 life in the lab 29 pretty colors 24 teeny little devices 13 synthesis 12 nanocrap 10 xtals 9 bitching 8 experiments that actually work 8 solar cells 8 mystery flask 7 unsolicited advice 7 design strategy 6 glassware fetish 6 ink piercings 6 life as a grad student 5 photochemistry 5 destruction 4 google 4 oxygen 4 supramolecular 4 government work 3 kitties 3 ninja 3 oled 2 olet 2 displays 2 liquid crystals 2 poll 2 top five 2 david hasselhoff 1 lolnano 1 meta 1 blog archive blog archive september 2006 1 october 2006 13 november 2006 17 december 2006 15 january 2007 16 february 2007 15 march 2007 13 april 2007 12 may 2007 13 june 2007 11 july 2007 13 august 2007 14 september 2007 14 october 2007 13 organikers 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