Efficient blue TADF-type organic afterglow material<i>via</i>boric acid-assisted confinement

Shen, Song; Sun, Yuena; Wang, Donghui; Zhen, Zhang; Shi, Yue; Wang, Zhenguang

doi:10.1039/d2cc04544c

Cited by 8 publications

(3 citation statements)

References 42 publications

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“…High-resolution C 1s spectra presented three peaks at 288.8, 286.9, and 284.8 eV, corresponding to O–CO, C–O, and sp 2 C (Figure d) . The high-resolution B 1s spectrum was fitted into three peaks at 193.4, 194.2, and 195.5 eV, corresponding to –BCO 2, B 2 O 3 , and B–O bonds (Figure e). ,, This is consistent with the results of XRD and FTIR, which indicated that a partial amount of BA transferred into B 2 O 3 , and boron atoms are surrounded by carbon and oxygen atoms. Figure f shows the UV–vis absorption spectra of heated BA, Nap-BOH, and samples.…”

Section: Resultssupporting

confidence: 85%

“…4, 194.2, and 195.5 eV, corresponding to −BCO 2, B 2 O 3 , and B−O bonds (Figure 4e). 36,38,39 This is consistent with the results of XRD and FTIR, which indicated that a partial amount of BA transferred into B 2 O 3 , and boron atoms are surrounded by carbon and oxygen atoms. Figure 4f shows the UV−vis absorption spectra of heated BA, Nap-BOH, and samples.…”

Section: Resultssupporting

confidence: 85%

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Wide-Color-Tunable Afterglow Materials from Blue to Deep Red via Boric Acid Assisted Molecular Doping

Chen,

Fu,

Chang

et al. 2024

J. Phys. Chem. C

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The construction of afterglow materials with full-color tunable emissions is attractive but still a challenging task. Herein, a host–guest doping strategy was proposed to produce afterglow materials with an emission-color span of almost 210 nm (from blue to deep red) by heat treating the aqueous mixture of arylboronic acids and boric acid (BA). In-depth structural, photophysical, and theoretical studies revealed that the heat treatment process resulted in the dehydration of BA and the formation of a glassy state host, and arylboronic acids were loaded as guest molecules through H-bonds and covalent bonds with BA. The afterglow originated from arylboronic acids, and the afterglow color of products was related to their degree of conjugation of aromatic groups. The host–guest doping strategy significantly improved the photophysical performances of arylboronic acids, achieving a photoluminescence quantum yield as high as 81.7% and an emission lifetime of 2.90 s (afterglow >22 s). Triple information encryption based on emission lifetime and color-encoding was also achieved, demonstrating their commercial potential for use in anticounterfeiting and information storage.

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Section: Resultssupporting

confidence: 85%

Section: Resultssupporting

confidence: 85%

Wide-Color-Tunable Afterglow Materials from Blue to Deep Red via Boric Acid Assisted Molecular Doping

Chen,

Fu,

Chang

et al. 2024

J. Phys. Chem. C

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“…The epoxy composites were produced by adding fine powder of boric acid (H 3 BO 3 , Chempur Company, Piekary Śl ąskie, Poland) to the resin. This compound has a wide range of applications [31,36,[52][53][54], one of which is to improve the flame retardancy of polymers [31,39]. The ortho form of boric acid was used, as shown in Figure 1c [52].…”

Section: Boron Acid/epoxy Resin Compositesmentioning

confidence: 99%

Properties and Performance of Epoxy Resin/Boron Acid Composites

Rudawska,

Frigione,

Sarcinella

et al. 2024

Materials

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This research study focused on the effect of adding boric acid to epoxy resin in order to obtain a composite material with improved properties and performance. To this end, a fine powder of boric acid (H3BO3) was introduced into epoxy resin in different amounts, i.e., 0.5 g, 1.0 g, and 1.5 g. As the matrix of the epoxy composites, styrene-modified epoxy resin based on bisphenol A (BPA) (Epidian 53) was used. It was cross-linked with two types of curing agents, i.e., an amine (ET) and a polyamide (PAC). The mechanical properties of the obtained epoxy composites (in terms of compressive strength, compressive modulus, and compressive strain) were determined at room temperature in order to assess the effect of the addition of boron acid and of the type of curing agent employed to cure the epoxy on these characteristics. Calorimetric measurements were made to highlight any changes in the glass transition temperature (Tg) as a result of the addition of boric acid to epoxy resin. Finally, flammability tests were performed on both Epidian 53/PAC and Epidian 53/ET epoxy composites to analyze their fire behavior and consequently establish the effectiveness of the selected additive as a flame retardant.

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Excitation‐Dependent Long Afterglow Room‐Temperature Phosphorescence Material Activated by Doping Boric Acid Matrix

Deng

Guan

et al. 2023

Advanced Optical Materials

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Room-temperature phosphorescence (RTP) materials are normally prepared by doping guest materials into space-limited host materials to inhibit nonradiative decay. This work aims to prepare a long afterglow excitation-dependent emission RTP material by doping a small amount of 4-carboxyphenylboronic acid into the boric acid matrix, followed by heat-treating. The calculation of density functional theory shows that the electron cloud distribution and electron transfer trend of the selected material reduces the energy requirement to excite the RTP properties of the obtained materials. The obtained RTP materials can be excited by UV light at 310 and 365 nm for dark blue and green phosphorescence emission, respectively. The results demonstrate the long phosphorescence lifetimes of 1.97 and 0.62 s and the high absolute photoluminescence quantum yields of 17.4% and 15.6%. These results show that the obtained RTP materials have potential prospects as information coding and phosphorescent anti-counterfeiting.

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Efficient blue TADF-type organic afterglow materialviaboric acid-assisted confinement

Abstract: A heat treatment method is developed to produce blue afterglow materials, achieving a photoluminescence quantum yield of 65% and an emission lifetime of 0.18 s (afterglow: >2 s). The afterglow...

Cited by 8 publications

References 42 publications

Wide-Color-Tunable Afterglow Materials from Blue to Deep Red via Boric Acid Assisted Molecular Doping

Wide-Color-Tunable Afterglow Materials from Blue to Deep Red via Boric Acid Assisted Molecular Doping

Properties and Performance of Epoxy Resin/Boron Acid Composites

Excitation‐Dependent Long Afterglow Room‐Temperature Phosphorescence Material Activated by Doping Boric Acid Matrix

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