Competitive ICT in asymmetric D−A Scaffolds showing visible solvatochromism, temperature-induced emission enhancement and AIE based acidochromism

Kushwaha, Ashish Kumar; Kumar, Yogesh; Kumar, Surendra; Singh, Roop Shikha

doi:10.1016/j.jlumin.2022.119072

Cited by 10 publications

(2 citation statements)

References 73 publications

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“…69 The AIE phenomenon has opened new routes to investigate the luminescence behavior in the aggregate/condensed state and hence is a refined strategy to develop novel luminogenic materials with desired photophysical characteristics. 70–72…”

Section: Introductionmentioning

confidence: 99%

Recent advances in AIEgen-based chemosensors for small molecule detection, with a focus on ion sensing

Asthana,

Mouli,

Tamrakar

et al. 2024

Anal. Methods

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Section: Introductionmentioning

confidence: 99%

Recent advances in AIEgen-based chemosensors for small molecule detection, with a focus on ion sensing

Asthana,

Mouli,

Tamrakar

et al. 2024

Anal. Methods

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“…Therefore, we envisaged that the compounds containing carbonyl oxygen might also be utilized as probes for acidochromism. [58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73] In this work, we have designed and synthesized a series of three symmetrical red-colored chalcone derivatives containing two non-planar electron-rich phenothiazine units linked together through a cross-conjugated system, giving a D-π-A-π-D type push-pull molecular arrangement (Figure 1). To fine tune the photophysical properties, different alkyl chains (n = 2À 4) were substituted at position 10 of the phenothiazine units.…”

Section: Introductionmentioning

confidence: 99%

Multi Stimuli Responsive Non‐Doped Red Emitting AIEE Active Phenothiazine‐Based Chalcones: Crystal Structure, Solvatochromism, Turn‐on Mechanofluorochromism and Acidochromism

Kumari

Milton

2022

Eur J Org Chem

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We report on a series of phenothiazine‐based D‐π‐A‐π‐D type cross‐conjugated non‐doped red‐emitting molecules synthesized by simple Claisen‐Schmidt condensation, which exhibit excellent AIEE phenomena through the formation of large‐sized nano‐aggregates. These thermally stable red fluorescent organic materials have low band gap energies (Eg=1.84–2.15 eV) and also display reversible mechanofluorochromism. The CIE chromaticity coordinates of red emissive ground powders were closer to the standard red‐light chromaticity coordinates. These chalcones also exhibited positive solvatochromism, and large Stokes shifts. Finally, these compounds were utilized as reversible volatile acid sensors to detect TFA in solution as well as in solid state, by virtue of the presence of electron withdrawing carbonyl oxygen, and they could detect TFA at a concentration as low as 15.8 ppm in the presence of C4.

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Manifesting the multi‐stimuli‐responsive behaviour of triazole‐substituted triphenylamine

Pandey,

Samarth,

Kharabe

et al. 2024

Luminescence

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The development of multi‐stimuli‐responsive (MSR) materials is a tempting yet intriguing challenge due to the absence of a defined design approach. In this study, we designed and synthesised two compounds based on triphenylamine, namely, TPA‐Tz1 and TPA‐Tz2. The photoluminescent investigations reveal the MSR behaviour of both compounds. TPA‐Tz1 shows reversible mechanochromism with a blue‐shifted emission due to changes in intermolecular interactions. Furthermore, both compounds exhibit solvatochromism in solvents of varying polarity. Detailed studies suggest that solvatochromism in TPA‐Tz1 can be attributed to twisted intramolecular charge transfer (TICT), while in TPA‐Tz2, it is due to intramolecular charge transfer (ICT). Additionally, both compounds display acidochromic properties in solution as well as in the solid state due to the protonation of the triazole ring. All changes in emissions are corroborated through theoretical calculations. The results provide insights into the intricate interplay of molecular interactions and structural rearrangements that contribute to the compound's multifaceted responsiveness.

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Competitive ICT in asymmetric D−A Scaffolds showing visible solvatochromism, temperature-induced emission enhancement and AIE based acidochromism

Cited by 10 publications

References 73 publications

Recent advances in AIEgen-based chemosensors for small molecule detection, with a focus on ion sensing

Recent advances in AIEgen-based chemosensors for small molecule detection, with a focus on ion sensing

Multi Stimuli Responsive Non‐Doped Red Emitting AIEE Active Phenothiazine‐Based Chalcones: Crystal Structure, Solvatochromism, Turn‐on Mechanofluorochromism and Acidochromism

Manifesting the multi‐stimuli‐responsive behaviour of triazole‐substituted triphenylamine

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