How Boron Doping Shapes the Optoelectronic Properties of Canonical and Phenylene-Containing Oligoacenes: A Combined Experimental and Theoretical Investigation
and a related compound (DBI) featuring two biphenylene‐2,3‐diyl units in place of naphthalene‐2,3‐diyl moieties are reported. Striking differences between the optoelectronic properties of DBP and DBI have been experimentally observed, and explained by quantum chemical calculations. DBP is a member of the oligoacene family, DBI is a linear [N]phenylene derivative. The yellow DBP shows blue photoluminescence
Dual Role of Doubly Reduced Arylboranes as Dihydrogen- and Hydride-Transfer Catalysts
作者:Esther von Grotthuss、Sven E. Prey、Michael Bolte、Hans-Wolfram Lerner、Matthias Wagner
DOI:10.1021/jacs.9b01998
日期:2019.4.10
activation strongly depend on the B-bonded substituents and the counter cations. Smaller substituents (e.g., H, Me) are superior to bulkier groups (e.g., Et, pTol), and a Mes substituent is even prohibitively large. Li+ ions, which form persistent contact ion pairs with [DBA]2-, slow the H2-addition rate to a higher extent than more weakly coordinating Na+/K+ ions. For the hydrogenation of unsaturated compounds
Aryl–aryl coupling in a polycyclic aromatic hydrocarbon with embedded tetracoordinate boron centre
作者:Sven Kirschner、Song-Song Bao、Melina K. Fengel、Michael Bolte、Hans-Wolfram Lerner、Matthias Wagner
DOI:10.1039/c9ob00618d
日期:——
The addition of 2 eq. of MesLi to the biphenylene-containing 9,10-dihydro-9,10-diboraanthracene (DBA) 2 results in the formation of the corresponding oxaboraphenanthrene 3 after column chromatography under ambient conditions. In the initial step, the anionic B–Mes monoadduct of 2 is generated, which eliminates a formal [Mes2B:]− ion with concomitant C–C-bond formation (room temperature, 18 h). The
Stepwise synthesis and properties of a 9,10-dihydro-9,10-diboraanthracene
作者:Tomohiro Agou、Masaki Sekine、Takayuki Kawashima
DOI:10.1016/j.tetlet.2010.07.068
日期:2010.9
A stepwise synthetic method for a 9,10-dihydro-9,10-diboraanthracene was developed, and the optical and electrochemical properties as well as the molecular structure of the 9,10-dihydro-9,10-diboraanthracene were elucidated. The 9,10-dihydro-9,10-diboraanthracene exhibited high complexation ability against fluoride ion, and the complexation was accompanied by the enhancement of photoluminescence emission, probably due to intramolecular charge transfer between the two boron atoms. (C) 2010 Elsevier Ltd. All rights reserved.