Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, Japan.
J Am Chem Soc. 2012 Jun 6;134(22):9130-3. doi: 10.1021/ja3036042. Epub 2012 May 21.
We disclose a new planarized triarylborane in which the tri-coordinated boron atom is embedded in a fully fused polycyclic π-conjugated skeleton. The compound shows high stability toward oxygen, water, and silica gel, despite the absence of steric protection around the B atom. Reflecting the electron-donating character of the π-skeleton and the electron-accepting character of the B atom, this compound shows broad absorption bands that cover the entire visible region and a fluorescence in the visible/near-IR region. In addition, this compound shows dramatic property changes upon formation of a tetra-coordinated borate, such as thermochromic behavior in the presence of pyridine.
我们公开了一种新型的平面化三芳基硼，其中三配位的硼原子嵌入完全融合的多环π共轭骨架中。尽管 B 原子周围没有空间位阻保护，但该化合物对氧气、水和硅胶表现出很高的稳定性。反映出π骨架的供电子特性和 B 原子的受电子特性，该化合物显示出覆盖整个可见光区域的宽吸收带和在可见/近红外区域的荧光。此外，该化合物在形成四配位硼酸时表现出显著的性质变化，例如在吡啶存在下的热致变色行为。
