White-light emission from a structurally simple hydrazone

Shao, Baihao; Stankewitz, Nell; Morris, Jacob A.; Liptak, Matthew D.; Aprahamian, Ivan

doi:10.1039/c9cc03912k

Cited by 20 publications

(13 citation statements)

References 53 publications

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“…288,299 Their multi-responsive nature, together with their isomer-dependent emission properties, make (acyl)hydrazones interesting candidates for constructing more complex systems combing acid/base chemistry, metal-ion binding and photochemical processes as triggers. 288,[300][301][302][303][304][305] Thereby, the thermodynamically stable isomer in acyl (3.11 in Fig. 19) and phenylhydrazones (3.12-14 in Fig.…”

Section: Photoswitches Relying On the Isomerization About Double-bondsmentioning

confidence: 98%

Molecular photoswitches in aqueous environments

et al. 2021

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Section: Photoswitches Relying On the Isomerization About Double-bondsmentioning

confidence: 98%

Molecular photoswitches in aqueous environments

et al. 2021

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“…Among all the external stimuli, light is an ideal candidate, because of its clean, noninvasive, and remote-controlling nature. [117][118][119][120] We have reported [121] an in situ photo-switched multicolor luminescent supramolecular assembly, which has been produced (Figure 6b) from anionic carbon dots and cationic supramolecular nanofibers that are comprised of a styrylpyridinium-modified diarylethene and CB [8]. Benefiting Reproduced with permission.…”

Section: Luminescent Assemblies Based On Multiple-fluorophoresmentioning

confidence: 99%

Color‐Tunable Supramolecular Luminescent Materials

Wang

et al. 2021

Advanced Materials

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Constructing multicolor photoluminescent materials with tunable properties is an attractive research objective on account of their abundant applications in materials science and biomedical engineering. By comparison with covalent synthesis, supramolecular chemistry has provided a more competitive and promising strategy for the production of organic materials and the regulation of their photophysical properties. By taking advantage of dynamic and reversible noncovalent bonding interactions, supramolecular strategies can, not only simplify the design and fabrication of organic materials, but can also endow them with dynamic reversibility and stimuli responsiveness, making it much easier to adjust the superstructures and properties of the materials. Occasionally, it is possible to introduce emergent properties into these materials, which are absent in their precursor compounds, broadening their potential applications. In an attempt to highlight the state‐of‐the‐art noncovalent strategies available for the construction of smart luminescent materials, an overview of color‐tunable materials is presented in this Review, with the emphasis being placed on the examples drawn from host–guest complexes, supramolecular assemblies and crystalline materials. The noncovalent synthesis of room‐temperature phosphorescent materials and the modulation of their luminescent properties are also described. Finally, future directions and scientific challenges in the emergent field of color‐tunable supramolecular emissive materials are discussed.

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“…A new family of fluorescent materials based on hydrazones, which can emit various colors of white, yellow, or green fluorescence in solution, solid and hydrogel states, is very promising in the fields of, for example, chemosensors, photochromism, and photopharmacology, due to their diverse functions and facile synthesis. Hydrazone‐based AIE materials have been reported to respond to various environments and stimulation, including H + ‐induced aggregate emission . However, it is still challenging to design easily synthesized, stable, and tunable AIE materials.…”

Section: Figurementioning

confidence: 99%

“…The fluorescence quantum yield of compound 3 and 4 were found to be 5.3 and 5.1 %, respectively,m oreover,t he quantum yield of 3c is 22.6 %, these numbers are comparable or higher than those of structurally similar hydrazones. [18,19] On the other hand, 3a and 3b exhibit lower quantum yields (0.75 and 0.06 %), which means that the anion-exchange reaction of 3 may be ap otential method for fluorescencep robing of halide ions. .…”

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confidence: 99%

Tunable Aggregation‐Induced Emission of Imidazole Hydrazones by pH and Anions

Tian

Zheng

et al. 2019

Chemistry A European J

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Aggregation-induced emission (AIE) materials have drawn great attention for applicationsa so rganic light-emitting diodes (OLED) and probes. The applications are, however,r estricted by the complexs yntheses and hydrophobic properties. Herein, ao ne-step synthesis of an AIE materialb ased on imidazole hydrazone is assessed. Protonation of the imidazole-H leads to emission color changef rom yellow to green in the solid state. The emission color is recovered upon imidazole-H + deprotonation. Moreover,t he emission wavelength shifts from 532 to 572 nm by anion exchange. In addition, an enhanced emission (F F up to 22.6 %) was obtained with the Br À anion compared with NTf 2 À ,S bCl 5 À ,P F 6 À ,a nd OTf À anions.X -ray crystallography studies togetherw ith theoretical calculations show that the enhanced emissiono f hydrazone salts arises from strong hydrogen bondingb etween the hydrazone proton andt he halide ion (Cl À or Br À ).

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White-light emission from a structurally simple hydrazone

Abstract: Two hydrazones featuring a unique excitation wavelength-dependent dual fluorescence emission have been developed.

Cited by 20 publications

References 53 publications

Molecular photoswitches in aqueous environments

Molecular photoswitches in aqueous environments

Color‐Tunable Supramolecular Luminescent Materials

Tunable Aggregation‐Induced Emission of Imidazole Hydrazones by pH and Anions

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