School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China.
Chem Asian J. 2023 Jul 3;18(13):e202300302. doi: 10.1002/asia.202300302. Epub 2023 May 31.
While the majority of nonconventional luminophores consist of electron-rich heteroatoms, an emerging category with electron-deficient atoms (e. g. boron) have gained much attention. In this work, we focused on one of the most common boron-containing substances, namely bis(pinacolato)diboron (BE1) and its analogue bis(2,4-dimethylpentane-2,4-glycolato)diboron (BE2), whose empty p-orbitals of boron atoms and p-orbitals with lone pairs of oxygens form π frameworks. Both compounds are nonemissive in dilute solutions but depict remarkable photoluminescence (PL) at aggregate states, featuring aggregation-induced emission characteristics. Additionally, their PL can be easily tuned by various external factors, such as excitation wavelength, compression, and oxygen. These photophysical properties could well be explained by the clustering-triggered emission (CTE) mechanism.
虽然大多数非常规发光体由富电子杂原子组成，但具有缺电子原子（例如硼）的新兴类别引起了广泛关注。在这项工作中，我们专注于最常见的含硼物质之一，即双（频哪醇）二硼（BE1）及其类似物双（2,4-二甲基戊烷-2,4-二醇）二硼（BE2），其硼原子的空 p 轨道和带有孤对氧的 p 轨道形成π骨架。这两种化合物在稀溶液中均不发光，但在聚集态下表现出显著的光致发光（PL），具有聚集诱导发光特性。此外，它们的 PL 可以很容易地通过各种外部因素进行调节，例如激发波长、压缩和氧气。这些光物理性质可以很好地用聚集触发发射（CTE）机制来解释。
