NNNS chemistry blog http://chem.vander-lingen.nl Chemistry blog : news - comments - basics in chemistry en-us 1440 New in SLA http://chem.vander-lingen.nl/articles/New in SLA/id/291/itemid/941 Unusual to see the three authors of a Science article also listed as the CEO, CTO and chairman of a commercial business. The article is about 3D printing (DOI) and the company is 3D printing company Azul3D. Okay, Walker, Hedrick and Mirkin also work at Northwestern University. Stereolithography Wednesday 09 Oct 2019 18:42:51 New in CASP http://chem.vander-lingen.nl/articles/New in CASP/id/290/itemid/940 Quick update from the field of CASP (Computer Assisted Synthesis Planning) by Thakkar / Kogey / Reymond / Engkvist / Bjerrum in a recent ChemRxiv article (DOI). In it they bring artificial intelligence to retrosynthetic analysis, a particular chemical human art thus far obtained "through years of ex Sunday 29 Sep 2019 14:42:59 New in nitrogen reduction http://chem.vander-lingen.nl/articles/New in nitrogen reduction/id/290/itemid/939 New nitrogen reduction paper out on ChemRxiv (Bruch et al. DOI). See earlier nitrogen reduction coverage here and here. Alexander Miller heads the Miller group at UNC and has been publishing about catalysis since 2005. The publication trail almost inevitably has been leading up to nitrogen reduction Monday 16 Sep 2019 18:48:06 Tetravinylallene http://chem.vander-lingen.nl/articles/Tetravinylallene/id/290/itemid/938 Tetravinylallene is new improbable molecule out of the laboratory of M.S. Sherburn (Elgindy et al. DOI). This blog has been reporting about earlier stranger things such as divinylallene in 2011 and 3-vinyl-1,4,heptadiene in 2012. They all belong to a class of hydrocarbons called dendralenes that hav Friday 13 Sep 2019 13:23:41 New in Mitsunobu http://chem.vander-lingen.nl/articles/New in Mitsunobu/id/290/itemid/937 In Science this week Beddoe et al. report on a catalytic Mitsunobu reaction (DOI). The classic Mitsunobu is a seemingly simple reaction of an alcohol with an acid to form an ester but with two improbable stoichiometric additives triphenyl phoshine and DEAD. The reaction mechanism is bewildering but Sunday 01 Sep 2019 19:59:20 Elements in the news http://chem.vander-lingen.nl/articles/Elements in the news/id/289/itemid/936 New segment on this blog. Elements in the news. What have they been up to lately? Tantalum and other metals have been discovered inside millions of discarded phones and laptops just waiting to be mined / recycled the BBC reports (link). Interesting use here of the phrase "endangered metals". Che Saturday 24 Aug 2019 11:43:41 Scotch on Whisky http://chem.vander-lingen.nl/articles/Scotch on Whisky/id/289/itemid/935 Can you taste the difference between an 12-year old Glenfiddich and an 15-year old Glenfiddich? According to a group of Scottish researchers you can not and they have therefore devised a laboratory method that can. (Macias et al. DOI) (TheGuardian report). The newly developed biosensor is based Saturday 03 Aug 2019 10:41:46 Scite check for chemists http://chem.vander-lingen.nl/articles/Scite check for chemists/id/288/itemid/934 This month in the US, The National Science Foundation awarded AI startup scite 224,559 dollars in funding for their 'deep learning platform to identify confirming and refuting citations' (link, link). Go to the scite.ai website, enter a DOI and find out how many publications either mentioned the art Saturday 20 Jul 2019 22:04:42 Global aromaticty http://chem.vander-lingen.nl/articles/Global aromaticty/id/288/itemid/933 Hückel's rule predicts that any cyclic conjugated system with 2n+4 electrons is aromatic with marked consequences for reactivity en spectroscopy. The classic examples with an increasing number of participating electrons are the cyclopropenium ion (n=0) benzene (n=1) and the cyclooctatetraenide anion Saturday 20 Jul 2019 11:59:15 Tetracene as drug precursor http://chem.vander-lingen.nl/articles/Tetracene as drug precursor/id/287/itemid/932 Dennis, Okumura and Sarlah report a synthesis of idarubicinone, a compound closely related to and precursor to Idarubicin, a well known antileukemic drug. (DOI) They are both members of the anthracycline class of drugs that work by intercalating with DNA. They can do that because they are flat as a Tuesday 25 Jun 2019 20:56:23 A silanone http://chem.vander-lingen.nl/articles/A silanone/id/287/itemid/931 In chemistry silicon to oxygen chemical bonds are nothing special, just look at siloxanes. But whereas a single bond is common, a double bond would require some counseling between the two. In a so-called silanone R(R)Si=0 a large difference in electronegativity is in the way and orbital mixing is g Sunday 23 Jun 2019 19:31:08 New in ethanol oxidation http://chem.vander-lingen.nl/articles/New in ethanol oxidation/id/287/itemid/930 Liang et al. report a direct 12-electron ethanol oxidation with a new type of catalyst system. Ethanol fuel cells have a lot of advantages: high energy content, non-toxic, fuel readily available, light-weight but are not exactly commerce-ready: the only cell found available in a shop is a fuel cell Monday 10 Jun 2019 11:30:34 Antimonene 2.0 http://chem.vander-lingen.nl/articles/Antimonene 2.0/id/287/itemid/929 In a next iteration on the graphene theme, Peng et al. report on a new synthesis of antimonene. (DOI). In an ideal world antimonene is a single two-dimensional layer of antimony hexagons but in the harsh laboratory reality layers stick together to form multilayers and instead of one smooth layer you Saturday 08 Jun 2019 19:54:43 Shell publicity stunt http://chem.vander-lingen.nl/articles/Shell publicity stunt/id/287/itemid/928 Very recently this blog (based in The Netherlands) had the opportunity to tank gasoline at a Shell station that had on offer a brand new product: carbon dioxide compensation. And very affordable: on one litre of E95 at 1,71 euro it costs just one cent. Shell's carbon footprint is a hot topic, the Du Saturday 08 Jun 2019 12:26:58 New Xtacy perfume rolled out http://chem.vander-lingen.nl/articles/New Xtacy perfume rolled out/id/286/itemid/927 Quick dispatch from the illegal drug laboratory battle front (earlier episode here). Parts of The Netherlands are littered with them but how to make members of the public aware of a hidden drug lab where they live or work? After all, the smell of cannabis from an illegal plantation may be familiar t Sunday 26 May 2019 20:19:53 Penta aqua nitrosyl iron sulphate http://chem.vander-lingen.nl/articles/Penta aqua nitrosyl iron sulphate/id/286/itemid/926 In the nitrate test iron(II) sulfate is added to a solution suspected of containing nitrates followed by slowly adding sulfuric acid so that it forms a layer below the aqueous layer. If nitrates are out there they reveal themselves by a visible brown ring between the two layers. The chemical reactio Friday 24 May 2019 09:49:09 Ozonolysis latest http://chem.vander-lingen.nl/articles/Ozonolysis latest/id/286/itemid/925 As pointed out by Smaligo et al. in a recent article in Science,(DOI) in organic synthesis it is not always about combining small molecules to create larger ones but occasionally it can be about cutting existing bonds. Ozonolysis is a classic reaction involving the cleavage of an alkenes, for exampl Sunday 19 May 2019 11:39:54 The cathones have it, the cathones have it! http://chem.vander-lingen.nl/articles/The cathones have it, the cathones have it!/id/285/itemid/924 The list of citations of Professor Jun Chen (ORCID) has a clear theme: that of batteries! Name a compound and apply it in a battery somehow be it carbon monoxide, manganese hydroperoxide, nanotubes or benzoquinone. A recent publication concerns cyclohexanehexone as target compound, for use as cathod Saturday 27 Apr 2019 16:36:27 The finite seawater engine http://chem.vander-lingen.nl/articles/The finite seawater engine/id/285/itemid/923 Not an infinite submarine engine running on seawater. That was my brain getting carried away from just scanning the title. First,carefully read the article and then rush to conclusions. The article in question (DOI) explains how seawater can work as the one end of a galvanic cell, not for use in sub Wednesday 24 Apr 2019 19:07:11 The helium hydride ion http://chem.vander-lingen.nl/articles/The helium hydride ion/id/285/itemid/922 In the news this week: helium hydride or more precise the helium hydride cation. And in the news why? The first ever detection of the molecule in space by an international group of radio astronomers. (DOI) The observation was made inside SOFIA (a plane with an on-board telescope operating at an alti Saturday 20 Apr 2019 19:49:58