167024-28-4Relevant academic research and scientific papers
Acene-based transmitter molecules for photon upconversion
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Paragraph 0141; 0142; 0143, (2018/10/04)
Provided herein are transmitter ligands that improve photon upconversion of near infrared light (NIR) to visible light. The presently provided ligands are complexed to semiconductor nanocrystals and improve triplet energy transfer from semiconductor nanocrystal to annihilator in triplet-triplet annihilation. Suitable applications include bio-imaging.
Concave 1,10-phenanthrolines as ligands for cyclopropanations - Towards a deeper understanding of the stereoselectivity
Eggers, Friederike,Luening, Ulrich
experimental part, p. 2328 - 2341 (2009/09/05)
Four new mono- and bimacrocyclic 1,10-phenanthrolines - 3b and 4a-c - containing aryl bridgeheads have been synthe- sised. The etherification of the aryl bridgeheads was accomplished by Williamson or Mitsunobu reactions. A key step in the synthesis of the macrocyclic phenanthrolines 3 and 4 is the Suzuki coupling of 2,9-diiodo-1,10-phenan- throline (12) with the appropriately substituted boronic acids 17 and 20. Ring-closing metathesis and hydrogenation completed the synthesis. The resulting macrocyclic 1,10-phenan- throlines 3b and 4a-c were tested as ligands in a copper(I)- catalysed stereoselective cyclopropanation.
