1414142-02-1Relevant articles and documents
Influence of the bridging elements on the optical properties of linked 9,10-dihydro-9,10-diboraanthracenes
Januszewski, Estera,Bolte, Michael,Lerner, Hans-Wolfram,Wagner, Matthias
, p. 8420 - 8425 (2012)
Starting from the monofunctionalized 9,10-dihydro-9,10-diboraanthracene derivatives MesB(C6H4)2BX (X = H, Br), the bridged systems MesB(C6H4)2B-L-B(C 6H4)2BMes have been synthesized with L = -C(H)=C(H)(p-C6Me4)C(H)=C(H)- (5), -C≡C(p-C 6Me4)C≡C- (6), and -(p-C6H 4)(p-C6Me4)(p-C6H4)- (7). The compounds were characterized by NMR, IR, UV/vis, and fluorescence spectroscopy. The vinyl- and phenylboranes 5 and 7 are pale yellow solids, whereas the alkynylborane 6 possesses a bright yellow color. The emission maxima of 5-7 in toluene are λmax(em) 477, 460, and 461 nm with quantum yields φf of 0.02, 0.30, and 0.04, respectively. Alkynylborane 6 was found to be the least air- and moisture-sensitive of the three derivatives.