DOI: 10.1002/asia.201000641 Synthesis and Spectroscopic Properties of Fused-Ring-Expanded Aza-Boradiazaindacenes Hua Lu, [a, b] Soji Shimizu, [b] John Mack, [b] Zhen Shen,* [a] and Nagao Kobayashi* [b] 1026  2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Chem. Asian J. 2011, 6, 1026 – 1037 FULL PAPERS