A series of 3,6-di-tert-butyl carbazole-functionalized 9-borafluorene derivatives have been prepared with outstandingly strong photoluminescence with quantum yields up to ca. 100 and 94% for Mes*BF-pCz in solution and film, respectively. 1,3,5-Tris(trifluoromethyl)benzene (^FMes)-substituted compounds exhibit enhanced Lewis acidity with coordination to weak nucleophiles like tetrahydrofuran, resulting in a long afterglow at low temperature. The large two-photon absorption cross-section of ca. 1103 GM for Mes*BF-pCz at 800 nm in CH₂Cl₂ indicated its potential application in bioimaging.

中文翻译：

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咔唑悬垂物对高亮度 9-硼芴衍生物的取代基调制

已经制备了一系列 3,6-二叔丁基咔唑官能化的 9-硼芴衍生物，具有非常强的光致发光，量子产率高达约 Mes*BF-pCz在溶液和薄膜中分别为 100% 和 94% 。1,3,5-三（三氟甲基）苯（^F Mes）取代的化合物表现出增强的路易斯酸性，与四氢呋喃等弱亲核试剂配位，导致低温下长时间的余辉。约的大双光子吸收截面。在 CH ₂ Cl ₂中 800 nm 处Mes*BF-pCz 的1103 GM表明其在生物成像中的潜在应用。