Structure–property–function relationship of fluorescent conjugated microporous polymers

Bai, Ming; Babu, Heeralal Vignesh; Lakshmi, Vellanki; Rao, M. Rajeswara

doi:10.1039/d0qm00769b

Cited by 36 publications

(29 citation statements)

References 137 publications

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“…So far, the truxene core has been utilized to develop functional materials such as covalent organic frameworks (COFs), metal–organic frameworks (MOFs), CMPs, and so on, used in various potential applications. − Mostly, CMPs developed from the truxene core are fluorescent due to flexible aryl linkers and could be used as fluorescence sensors . For the highly selective and rapid detection of NAEs, many porous materials such as CMP-, ,− COF-, − and MOF-based ,− sensors have been utilized using the fluorescence-quenching pathway. However, the selective detection of PA by CMP-based sensors is less explored. − Therefore, we synthesized three truxene-based fluorescent CMPs ( Tx-CMPs ) in one step via Suzuki–Miyaura cross-coupling reaction (Scheme ) and studied the behavior of Tx-CMPs ( Tx - CMP-1 , Tx-CMP-2 , and Tx-CMP-3 ) toward the sensitive and ultrafast detection of PA.…”

Section: Introductionmentioning

confidence: 99%

“…For the highly selective and rapid detection of NAEs, many porous materials such as CMP-, ,− COF-, − and MOF-based ,− sensors have been utilized using the fluorescence-quenching pathway. However, the selective detection of PA by CMP-based sensors is less explored. − Therefore, we synthesized three truxene-based fluorescent CMPs ( Tx-CMPs ) in one step via Suzuki–Miyaura cross-coupling reaction (Scheme ) and studied the behavior of Tx-CMPs ( Tx - CMP-1 , Tx-CMP-2 , and Tx-CMP-3 ) toward the sensitive and ultrafast detection of PA. These polymers differ from each other by the electronic environment and conjugation of the benzene-based linkers.…”

Section: Introductionmentioning

confidence: 99%

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Luminescent Conjugated Microporous Polymers for Selective Sensing and Ultrafast Detection of Picric Acid

Nailwal

Devi

Pal

2022

ACS Appl. Polym. Mater.

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Luminescent conjugated microporous polymers (CMPs) are one of the important class of porous organic materials that possess a fully π-conjugated skeleton and high surface area and have been utilized as light-emitting materials. In this work, we have designed and developed three luminescent CMPs based on truxene core (Tx-CMPs) via Suzuki−Miyaura cross-coupling reaction in one step. The flexible aryl linker in Tx-CMPs prevents the possibility of aggregation-caused quenching (ACQ) due to π−π stacking of layers and thus offers a high luminescence in the synthesized Tx-CMPs. All Tx-CMPs possess a high BET surface area (S BET = 788−915 m 2 g −1 ) and excellent thermal stability. Utilizing the fluorescent nature and electron-rich property of the Tx-CMPs, we exploited them as a sensor for the selective and sensitive detection of picric acid (PA) among various nitroaromatic explosives. The Stern−Volmer constant (K SV ) for PA was estimated as 3.97 × 10 4 , 7.35 × 10 4 , and 2.39 × 10 4 M −1 for Tx-CMP-1, Tx-CMP-2, and Tx-CMP-3, respectively, indicating that PA can quench the fluorescence intensity of Tx-CMP-2 most efficiently. The detection limits of Tx-CMPs toward PA were found in the nanomolar range.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Luminescent Conjugated Microporous Polymers for Selective Sensing and Ultrafast Detection of Picric Acid

Nailwal

Devi

Pal

2022

ACS Appl. Polym. Mater.

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“…Porous fluorescent organic polymers (POPs) have emerged as new sensing materials − and recently are attracting attention in pesticide detection − owing to their large specific surface with tunable porous sizes and chromophore groups. Different from MOFs, the hyper-cross-linked POPs constructed though robust covalent bonds are more stable and can resist harsh acid–base and moist environments. − Despite numerous merits, the detection sensitivity of fluorescent POPs for pesticides is still far less satisfied.…”

Section: Introductionmentioning

confidence: 99%

Micro-/Mesoporous Fluorescent Polymers and Devices for Visual Pesticide Detection with Portability, High Sensitivity, and Ultrafast Response

Tang

Wang

2022

ACS Appl. Mater. Interfaces

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The residue of pesticides in crops, soil, and water continues to be a widespread concern due to the threat to human health and food safety. With the aim to develop highly sensitive sensing materials and portable detection devices, two dicarbazole-based fluorescent micro-/mesoporous polymers (JYs) with a larger specific surface area and pore sizes ranging from 1.1 to 34.2 nm are synthesized. The Stern–Volmer constants of JY fluorescence quenching for imidacloprid (50,063 M–1) exceed 23–51 times those of the reported porous organic polymers (980–2173 M–1). Of particular interest is the observation that JYs show rapid fluorescence response (2 s) and ultralow detection limit (30 ppb) for imidacloprid in water medium. The pronounced chemsensing property is attributed to the synergistic role of the hierarchical pore structure, large π-conjugation of chromophore groups, and strong inner filter effect between the polymer and imidacloprid molecule. Moreover, the pesticide detection of JYs exhibits good interference resistance in complicated service environments such as the extract liquids of the apple peel and field soil as well as aqueous solutions of various cations and anions. Because of the portability, excellent reusability, and sensitive fluorescence response, the prepared JYs and detection devices have promising applications in the on-site monitoring and early warning of the pesticide residues.

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“…Among these POPs, CMPs are a class of amorphous materials that permit the linking of building blocks in a π-conjugated fashion and possess 2D or 3D frameworks . They have been widely used in adsorption, − heterogeneous catalysis, − photocatalysis, , chemosensors, − energy storage, − flame retardancy, and other fields. Since CMPs possess the features of a large specific surface area, a highly delocalized π–π conjugated system, a certain degree of hydrophilicity, and variable active groups on the surface, there is a great potential for them to be used as novel sorbent materials in sorption science.…”

Section: Introductionmentioning

confidence: 99%

Nanoarchitectured Conjugated Microporous Polymers: State of the Art Synthetic Strategies and Opportunities for Adsorption Science

et al. 2022

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Conjugated microporous polymers (CMPs) have attracted extensive attention due to their permanent porosity, large specific surface area, unique thermal and chemical stability, and highly delocalized π−π conjugated skeleton. These outstanding characteristics give them a great potential for the applications in adsorption science and many other fields. This review summarizes the recent significant developments and breakthroughs in the synthesis of CMPs and their applications in the adsorption of a variety of compounds including gases, organic pollutants, heavy metal ions, etc. This review also highlights the efforts that the researchers have taken in the improvement of the adsorption performance of the CMPs. Meanwhile, the challenges that CMPs face in the field of adsorption are also discussed. Finally, the possible application directions of CMPs in the field of adsorption are also anticipated.

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Structure–property–function relationship of fluorescent conjugated microporous polymers

Abstract: Fluorescent porous organic polymers are a unique class of materials owing to their strong aggregation induced emission, long range exciton migration and permanent porosity, thus envisioned to possess a wide range of applications (sensing, OLEDs).

Cited by 36 publications

References 137 publications

Luminescent Conjugated Microporous Polymers for Selective Sensing and Ultrafast Detection of Picric Acid

Luminescent Conjugated Microporous Polymers for Selective Sensing and Ultrafast Detection of Picric Acid

Micro-/Mesoporous Fluorescent Polymers and Devices for Visual Pesticide Detection with Portability, High Sensitivity, and Ultrafast Response

Nanoarchitectured Conjugated Microporous Polymers: State of the Art Synthetic Strategies and Opportunities for Adsorption Science

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