Creation of Excitation‐Driven Hypervalent Tin(IV) Compounds For Aggregation‐Induced Emission and Application to Thermoresponsive Luminescent Films below Freezing Point

Chemistry - An Asian Journal, Journal Year: 2024, Volume and Issue: 19(24)

Published: Sept. 20, 2024

Although many researchers have devoted their much effort to establish the strategy for developing a stimuli-responsive molecule and tuning of properties according preprogrammed design, it is still challenging create desired molecules from scratch. We recently demonstrated that with large structural difference between theoretically optimized structures in ground excited states potential exhibit luminescent properties. defined these as an excitation-driven shown they are versatile platform designing molecules. Herein, based on concept molecules, we show hypervalent tin-fused azomethine (TAm) compounds possessing aggregation-induced emission (AIE) can be obtained by simple chemical modification methyl group although conventional TAm derivatives well known highly solution. Furthermore, combining solid-state luminescence property AIE coordination number shifts tin atom, thermoresponsive films operating below freezing point fabricated polymer. In this study, apply demonstrate obtain novel functional materials.

Language: Английский

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Liquid and film-type organic scintillators based on near-infrared fluorescent π-conjugated polymers containing hypervalent tin(IV) compounds

Polymer Journal, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Language: Английский

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Functional polymer materials containing heavy group‐14 elements focusing on germanium and tin

Smart Molecules, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract In this review, the synthesis, functions, and applications of polymers containing germanium tin, which are heavy group 14 elements, in their polymer frameworks summarized. Germanium tin can form similar skeletal structures with homologues carbon silicon, whereas show unique properties derived from large atomic radii weak binding energies. For example, polygermane polystannane exhibited light absorption UV–visible region conductivity because σ‐conjugation through main‐chain constructed by σ‐bonds between elements. The was affected conformational change main‐chain, thermochromic be induced. Furthermore, bonds were able to cleaved homolytically upon photoirradiation, radicals subsequently generated. By incorporating hypervalent elements into π‐conjugated system, it possible modulate electronic system σ*–π* conjugation highly coordinated Finally, for organic solar cells, light‐emitting materials, chemical sensors have been achieved. Herein, representative synthetic methods creating smart materials will explained.

Language: Английский

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π-Conjugated polymers consisting of heavier group 13 elements

Polymer Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

π-Conjugated polymers containing heavier group 13 elements are emerging materials applicable to optoelectronic devices and inorganic synthesis. This review presents an overview of synthesis optical properties these polymers.

Language: Английский

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Quadrupolar dinuclear hypervalent tin(iv) compounds with near-infrared emission consisting of Schiff bases based on π-conjugated scaffolds

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Since π-conjugated molecules are commonly used as a scaffold for constructing optoelectronic and functional materials, much effort has been devoted to exploring novel molecular scaffolds obtaining superior properties. This study focuses on dinuclear hypervalent tin(iv) compounds prepared by the ladderization of Schiff bases using tin units. The optical measurements found that introducing atoms can reinforce D-π-A system. We synthesized two types simple condensation reactions observed near-infrared (NIR) emission. Also, depending direction imine bonds, these had different quadrupolar orientations with D-π-A-π-D A-π-D-π-A systems followed negative solvatochromism, which is unique behavior quadrupolar-derived absorption. Furthermore, polymers involving showed NIR emission in wavelength range over 800 nm owing distinct expansion π-conjugation. Our findings could be useful not only electronic structures narrow energy gaps but also designing states environmental responsiveness.

Language: Английский

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Stimuli‐Responsive Optical Materials Based on Hypervalent Antimony‐Containing Conjugated Molecules

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 17, 2024

Abstract Stimuli‐responsive materials have been applied for sensor devices because they can transform and amplify various target stimuli into observable signals. Much effort has devoted to exploring effective molecular designs obtaining stimuli‐responsive behaviors by taking advantage of the unique optoelectronic properties π‐conjugated molecules involving elements. This study focuses on modulation electronic state scaffolds oxidation number change hypervalent antimony. demonstrate that strength intramolecular interaction between antimony framework be tuned with ligand structure, substituent effect, shifts In particular, color changes represented hypsochromic bathochromic wavelength optical bands are achieved oxidative reaction in solid state. Significantly, direction confidently predicted quantum chemical calculations. The findings, based main‐group elements, provide logical design strategies advanced materials.

Language: Английский

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