Oxygen sensing properties of thianthrene and phenothiazine derivatives exhibiting room temperature phosphorescence: Effect of substitution of phenothiazine moieties

Leitonas, Karolis; Tomkevičienė, Aušra; Baratte, Gabriel; Dabulienė, Asta; Punniyakoti, Sanjay Madhuran; Volyniuk, Dmytro

doi:10.1016/j.snb.2021.130369

Cited by 23 publications

(18 citation statements)

References 44 publications

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“…Another interesting result observed for these two devices was the appearance of the shoulders in the blue regions of their EL spectra after annealing. These shoulders were caused by the locally excited emission of phenothiazine units . Such a situation is possible when complete energy transfer between donor and acceptor moieties has not occurred due to the changing of dihedral angles under thermal annealing.…”

Section: Resultsmentioning

confidence: 99%

“…These shoulders were caused by the locally excited emission of phenothiazine units. 51 Such a situation is possible when complete energy transfer between donor and acceptor moieties has not occurred due to the changing of dihedral angles under thermal annealing. As a result, different CIE color coordinates were obtained for non-annealed and annealed OLEDs based on these two compounds (Figure 8b and Table 4).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Mechanochromic Materials Based on Tetraphenylethylene-Substituted Phenothiazines: Substituent-Dependent Hypsochromic and Bathochromic Switching of Emission

et al. 2023

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Phenothiazine-and tetraphenylethylene (TPE)-based mechanochromic materials (PTZTPE-1CHO, PTZTPE-4CHO, and PTZTPE-4CN) with different electron-withdrawing substituents (−CHO and −CN) were designed and synthesized by the Suzuki cross-coupling reaction of bromo-TPEs with the corresponding boronate esters of phenothiazine. The photophysical, aggregationinduced emission, mechanochromic, thermal, and electroluminescence properties of the synthesized compounds were investigated. The cyano group-bearing derivative PTZTPE-4CN exhibited reversible mechanochromism, and its emission maximum shifted bathochromically when mechanically ground, whereas the formyl groupcontaining derivatives PTZTPE-1CHO and PTZTPE-4CHO exhibited hypsochromically shifted mechanochromism. The solution of PTZTPE-4CN was weakly emissive, and PTZTPE-1CHO and PTZTPE-4CHO exhibit strong fluorescence in the solution state due to the intramolecular charge transfer transitions. The electroluminescence properties of the synthesized compounds as non-annealed and annealed non-doped prompt fluorescent emitters were studied in organic light-emitting diodes, which showed a maximum external quantum efficiency of 1.2% and a luminance of 8762 cd•m −2 .

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Mechanochromic Materials Based on Tetraphenylethylene-Substituted Phenothiazines: Substituent-Dependent Hypsochromic and Bathochromic Switching of Emission

et al. 2023

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“…Taking into account the results of the investigation of the thermal properties of H-PTZ-Bpin, CHO-PTZ-Bpin, CN-PTZ-Bpin, and PhCN-PTZ-Bpin (Table 1), it was concluded that they can be suggested for solid-state applications only in combination with hosts or polymeric matrixes (e.g. poly(vinyl alcohol), 20,21 poly(methyl methacrylate) 19,22 or ZEONEX 23 ). The thermal investigations for H-PTZ-Bpin, CHO-PTZ-Bpin, CN-PTZ-Bpin, and PhCN-PTZ-Bpin were carried out by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA).…”

Section: Thermal and Redox Properties Ionization Potentials And Elect...mentioning

confidence: 99%

“…19 A common method to enhance RTP in metal-free phosphors is to embed them into a carefully selected host matrix such as poly(vinyl alcohol), 20,21 poly(methyl methacrylate) 19,22 or ZEONEX. 23 In this work, a search for single-molecule white light emitters was performed on the basis of phenothiazine boronic ester derivatives (Chart 1) by substitution engineering. In the inert host ZEONEX, 24 one of the derivatives showed high quality white emission with a PLQY of 33%, CIE1931 colour coordinates of (0.26, 0.31), a colour rending index of 73 and colour temperature of 8145 K.…”

Section: Introductionmentioning

confidence: 99%

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Efficient monomolecular white emission of phenothiazine boronic ester derivatives with room temperature phosphorescence

et al. 2022

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Ultralong Blue Organic Room‐Temperature Phosphorescence Promoted by Green Assembly

Chen,

Zhu

et al. 2024

Adv Funct Materials

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In recent years, there is a growing interest in developing ultralong organic room‐temperature phosphorescence (ORTP) with lifetimes in the range of seconds. As one of the important three primary colors, ultralong blue ORTP is an indispensable core component in RTP regulation and application, however, the large Stokes shift characteristics pose certain challenges in developing ultralong blue ORTP. Here, a new family of blue phosphors are synthesized and ultralong blue ORTP are realized through crystal assembly in water and organic phase. Remarkably, compared to crystal materials obtained in organic phases, assembly materials obtained in water enabled long‐lived blue ORTP with lifetimes up to 2.3 s and phosphorescence quantum yield reached as high as 29.27%. In addition to the efficient and green assembly form, such dark blue ORTP materials possessed high thermal stability and flexible tunability. Moreover, the superiority of the selected assembly components is demonstrated by comparing them with polymer assembly and the proposed blue ORTP materials show great potential in an organic programmable information encryption/anti‐counterfeiting.

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Oxygen sensing properties of thianthrene and phenothiazine derivatives exhibiting room temperature phosphorescence: Effect of substitution of phenothiazine moieties

Cited by 23 publications

References 44 publications

Mechanochromic Materials Based on Tetraphenylethylene-Substituted Phenothiazines: Substituent-Dependent Hypsochromic and Bathochromic Switching of Emission

Mechanochromic Materials Based on Tetraphenylethylene-Substituted Phenothiazines: Substituent-Dependent Hypsochromic and Bathochromic Switching of Emission

Efficient monomolecular white emission of phenothiazine boronic ester derivatives with room temperature phosphorescence

Ultralong Blue Organic Room‐Temperature Phosphorescence Promoted by Green Assembly

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