A tunable phosphorescence supramolecular switch by an anthracene photoreaction in aqueous solution

Su, Ting; Liu, Yaohua; Chen, Yong; Liu, Yu

doi:10.1039/d1tc04100b

Cited by 22 publications

(11 citation statements)

References 70 publications

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“…Theoretical and practical values are consistently driving scientists to design and develop photoluminescent materials with novel properties. − Among them, room-temperature phosphorescence (RTP) materials have harvested special attention owing to their larger Stokes shifts and longer lifetimes compared to fluorescence, − hence wide applications in fields such as chemical sensing, − biological imaging, − molecular switches, , and organic light-emitting diodes (OLEDs). − Conventional inorganic and organometallic RTP materials typically involve noble metals like iridium and platinum. − Pure organic phosphorescent materials are therefore particularly desirable to avoid the usage of expensive and toxic heavy metals as well as harsh preparation conditions. − …”

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confidence: 99%

External Heavy-Atom Activated Phosphorescence of Organic Luminophores in a Rigid Fluid Matrix

Yan

2022

ACS Materials Lett.

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Growing attention has been paid to pure organic room-temperature phosphorescence (RTP). Although an insufficient population and fast nonradiative decay of triplet excitons are avoided in recent endeavors, complicated synthesis and limited universality still hinder its development. Further, fluid RTP materials are more difficult to design because of faster nonradiative relaxation. Herein, a deep eutectic mixture of glucose and choline, a stable supercooled liquid at room temperature, is employed as a matrix. Direct transformation from commercial fluorescent dyes to RTP fluid is realized by doping without modifications. The excited triplet states are generated by an external heavy atom, while the rigid noncovalent network stabilizes them with both functions intrinsic to the liquid matrix. Modulation of matrix components also results in nearly white light emission of a single dye. This study presents a general strategy to design fluid RTP materials starting from the vast library of fluorophores.

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confidence: 99%

External Heavy-Atom Activated Phosphorescence of Organic Luminophores in a Rigid Fluid Matrix

Yan

2022

ACS Materials Lett.

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“…[67][68][69][70] Recently, supramolecular assembly strategy has been employed to develop organic RTP materials in aqueous solution, which was proved to be an efficient strategy for achieving RTP emission in water solution. [71][72][73] The host materials generally possess rigid structure and can form an ordered assembly with the guest molecules. The strong host-guest interaction can inhibit molecular motions and protect the triplet exciton from quenchers in water solution.…”

Section: Macrocyclic Supramolecular Assemblymentioning

confidence: 99%

Achieving purely organic room temperature phosphorescence in aqueous solution

Sun

Zhu

2022

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Purely organic room temperature phosphorescence (RTP) materials have aroused increasing interests in recent years and have been widely applied in anticounterfeiting, biological imaging, sensing, etc. Currently, these materials can be efficiently developed in crystalline states and amorphous polymer-doped systems. However, achieving organic RTP in solution, especially in water solution, is still a formidable challenge. Recently, reports on aqueous phase RTP have been increasing and some feasible design strategies have been proposed; however, related investigations are still limited and there is a lack of systematic reviews. Therefore, we summarized the recent cases of aqueous phase organic RTP emission with primarily focusing on the RTP properties and efficient design strategies (e.g., forming nanoparticles from phosphorescent molecules and macrocyclic supramolecular assembly). Moreover, promising applications of the aqueous phase organic RTP emission in bio-imaging and sensing were discussed. Some detailed perspectives concerning materials design and application were provided with the hope to provide inspiration for the future development of aqueous phase organic RTP.

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“…However, there are still some limitations in the regulation of the RTP emission. Therefore, tunable RTP materials responding to stimulus such as temperature, − humidity, − mechanical force, − pH, − and light − have attracted extensive attention, revealing their broad application prospects in chemical sensing, , information anticounterfeiting, , optoelectronic devices, , and biological imaging. , …”

Section: Introductionmentioning

confidence: 99%

Water/Light Multiregulated Supramolecular Polypseudorotaxane Gel with Switchable Room-Temperature Phosphorescence

Liu,

Zhang,

et al. 2024

ACS Appl. Mater. Interfaces

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Water/light regulated room-temperature phosphorescence (RTP) of polypseudorotaxane supramolecular gel is constructed by threading the poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (PEG−PPG-PEG) chain with the bromoaromatic aldehyde into mono-(6-ethylenediamine-6-deoxygenated)-β-cyclodextrin (ECD) cavities and further assembling with negatively charged Laponite XLG (CNS) and diarylethene derivative (DAE) through electrostatic interaction. This hydrogel exhibits significant blue fluorescence emission; instead, after lyophilization to xerogel, the system exhibits both blue fluorescence and yellow RTP based on the rigid network structure of the xerogel, which restricts the vibration of the phosphor and suppresses the nonradiative relaxation process. Interestingly, the addition of excess ECDs to the gel system can enhance the RTP emission. Furthermore, the reversible luminescence behavior can be adjusted by the photoresponsive isomerism of DAE and humidity. This polypseudorotaxane supramolecular gel system provides a novel strategy for constructing tunable RTP materials.

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A tunable phosphorescence supramolecular switch by an anthracene photoreaction in aqueous solution

Abstract: Purely organic room-temperature phosphorescence (RTP) has attracted tremendous attention, but is rarely reported to possess stimulus responsiveness. Herein, we report a supramolecular RTP switch based on a dicationic guest molecule...

Cited by 22 publications

References 70 publications

External Heavy-Atom Activated Phosphorescence of Organic Luminophores in a Rigid Fluid Matrix

External Heavy-Atom Activated Phosphorescence of Organic Luminophores in a Rigid Fluid Matrix

Achieving purely organic room temperature phosphorescence in aqueous solution

Water/Light Multiregulated Supramolecular Polypseudorotaxane Gel with Switchable Room-Temperature Phosphorescence

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