Recent Advances in the Luminescence of Arylboronic Acids and their Heteroatom Condensates

Hackney, Hannah E.; Hall, Dennis G.

doi:10.1002/cptc.202100219

Cited by 8 publications

(2 citation statements)

References 82 publications

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“…For example, our group reported CTE-induced ultralong RTP from boric acid [30] (and similar results from another group [38] ), a kind of n electron-rich material that has been investigated for over 100 years. [39] It was largely different from the conventional boronic acids and esters in structure and phosphorescence mechanism, [40][41][42][43][44] thus was suspected as impurity-induced results very recently. [45] Moreover, although purification helps impurity identification in RTP confirmation, ppb-level impurity was once reported to be effective for RTP promoting.…”

Section: Introductionmentioning

confidence: 99%

Unusual phosphorescence of boric acid: From impurity or clusterization‐triggered emission?

Cao,

Wang,

Zheng

et al. 2023

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The unusual room‐temperature phosphorescence (RTP) from the n electron‐rich systems (without regular conjugated structure) has aroused great attention for structural designing and application development of RTP materials. Such emission has been ascribed to clusterization‐triggered emission (CTE) via weak through‐space conjugation of n electrons in the heteroatoms. However, there was suspicion on such RTP as impurity‐induced result. Therefore, in‐depth photophysical investigation and effective proof methods are needed to trace the origin of such RTP. Here, using the recently reported CTE phosphor boric acid as the example, a Jablonski diagram‐based verification protocol was proposed to confirm the intrinsic luminescence of the n electrons‐rich systems. Meanwhile, some other types of luminophores, that is, traditional phosphors, already reported impurity‐induced and host‐guest doping luminophores, were included for comparison. Overall, this work provides a basic paradigm for differentiating between the impurity‐involved and the n electron‐rich phosphors and will further deepen the understanding of nonconventional luminescence.

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Section: Introductionmentioning

confidence: 99%

Unusual phosphorescence of boric acid: From impurity or clusterization‐triggered emission?

Cao,

Wang,

Zheng

et al. 2023

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“…Oxaboranes 9 (X = Ar), oxaboroles 10 (X = OH), and related boron heterocycles 11 have garnered increased interest in recent years due to their biological activities, 12 optical properties, 13 and utility as synthetic building blocks. The ability to leverage the reactivity of oxaboracyclopentenes would enable rapid and tailorable syntheses of these boron heterocycles.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of oxaboranes via nickel-catalyzed dearylative cyclocondensation

et al. 2022

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Aggregation‐Induced Dual Phosphorescence from (o‐Bromophenyl)‐Bis(2,6‐Dimethylphenyl)Borane at Room Temperature

Dinkelbach

Kerner

et al. 2022

Chemistry A European J

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Designing highly efficient purely organic phosphors at room temperature remains a challenge because of fast non‐radiative processes and slow intersystem crossing (ISC) rates. The majority of them emit only single component phosphorescence. Herein, we have prepared 3 isomers (o, m, p‐bromophenyl)‐bis(2,6‐dimethylphenyl)boranes. Among the 3 isomers (o‐, m‐ and p‐BrTAB) synthesized, the ortho‐one is the only one which shows dual phosphorescence, with a short lifetime of 0.8 ms and a long lifetime of 234 ms in the crystalline state at room temperature. Based on theoretical calculations and crystal structure analysis of o‐BrTAB, the short lifetime component is ascribed to the T1M state of the monomer which emits the higher energy phosphorescence. The long‐lived, lower energy phosphorescence emission is attributed to the T1A state of an aggregate, with multiple intermolecular interactions existing in crystalline o‐BrTAB inhibiting nonradiative decay and stabilizing the triplet states efficiently.

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Recent Advances in the Luminescence of Arylboronic Acids and their Heteroatom Condensates

Cited by 8 publications

References 82 publications

Unusual phosphorescence of boric acid: From impurity or clusterization‐triggered emission?

Unusual phosphorescence of boric acid: From impurity or clusterization‐triggered emission?

Synthesis of oxaboranes via nickel-catalyzed dearylative cyclocondensation

Aggregation‐Induced Dual Phosphorescence from (o‐Bromophenyl)‐Bis(2,6‐Dimethylphenyl)Borane at Room Temperature

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