“My friend sent an awkward memo at work today.” - WindumArc
Hovertext: In Robot romantic comedies, everyone finds their perfect mate with no difficulty. The humor comes from imagining doing that without a digital brain.
Australian photographer Ray Collins first picked up a camera in 2007 and used it to photograph his friends surfing around his home after long shifts working in a nearby coal mine. His attention quickly shifted from his friends to patterns and forms he noticed in the waves. Collins, who is colorblind, was also drawn to the interplay of light and water, perhaps more attune to contrast than the nuance of color. He poetically refers to this switch from coal miner to fine art photographer as a balance between his “black life and blue life.”
The accolades, awards, and sponsorships have been heaped on Collins leading to the publication of his first book, Found at Sea, he also has a wide variety of prints on his website, and you can follow his photography day-to-day on Instagram. (via Laughing Squid)
1+1=3: By combining the exceptional reactivities of cyclic hypervalent iodine reagents and iron catalysts, Sharma and Hartwig achieved the azidation of CH bonds with unprecedented efficiency and selectivity. The late-stage introduction of azides into complex bioactive molecules will greatly facilitate the synthesis of analogues and accelerate the discovery of new chemical entities.
A new α-C(sp3)H alkynylation of unactivated tertiary aliphatic amines with 1-iodoalkynes as radical alkynylating reagents in the presence of [Au2(μ-dppm)2]2+ in sunlight provides propargylic amines. Based on mechanistic studies, a CC coupling of an α-aminoalkyl radical and an alkynyl radical is proposed for the C(sp3)C(sp) bond formation. The mild, convenient, efficient, and highly selective C(sp3)H alkynylation reaction shows excellent regioselectivity and good functional-group compatibility. A scale-up to gram quantities is possible with sunlight used as a clean and sustainable energy source.
Golden sunshine: With 1-iodoalkynes as radical alkynylation reagents, unactivated tertiary aliphatic amines react in the presence of [Au2(μ-dppm)2]2+ (dppm=bis(diphenylphosphanyl)methane) in sunlight to afford propargylamines. A CC coupling of an α-aminoalkyl radical and an alkynyl radical was proposed as the mechanism.
Graphene nanoribbons (GNRs) represent promising materials for the next generation of nanoscale electronics. However, despite substantial progress towards the bottom-up synthesis of chemically and structurally well-defined all-carbon GNRs, strategies for the preparation of their nitrogen-doped analogs remain at a nascent stage. This scarce literature precedent is surprising given the established use of substitutional doping for tuning the properties of electronic materials. Herein, we report the synthesis of a previously unknown class of polybenzoquinoline-based materials, which have potential as GNR precursors. Our scalable and facile approach employs few synthetic steps, inexpensive commercial starting materials, and straightforward reaction conditions. Moreover, due to the importance of quinoline derivatives for a variety of applications, the reported findings may hold implications across a diverse range of chemical and physical disciplines.
Towards nitrogen-doped nanoribbons: A previously unknown class of benzoquinoline-based materials was synthesized via the aza-Diels–Alder reaction. The reported straightforward and facile methodology provides ready access to a potentially diverse range of polybenzoquinolines. These materials hold promise as key intermediates for the synthesis of modular nitrogen-doped graphene nanoribbons.