Silicon-assisted unconventional fluorescence from organosilicon materials

Zuo, Yujing; Gou, Zhiming; Quan, Wei; Lin, Weiying

doi:10.1016/j.ccr.2021.213887

Cited by 52 publications

(30 citation statements)

References 67 publications

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“…Organosilicon compounds are widely applied in polymers, sealants, adhesives, coatings, and agents for surface treatments and used as synthetic intermediates in organic and medicinal chemistry. − Hydrosilanes are useful precursors for the preparation of many different silicon-containing molecules, and they are transformed into value-added molecules generally through Si–H bond activation. , The Si–H bond displays higher basicity and lower σ*-orbital energy than C–H bonds, which make them a stronger σ -donor and π-acceptor, respectively. As a result, it is relatively easier to activate Si–H bonds than C–H bonds (Figure S1).…”

Section: Introductionmentioning

confidence: 99%

PtCu@Ir-PCN-222: Synergistic Catalysis of Bimetallic PtCu Nanowires in Hydrosilane-Concentrated Interspaces of an Iridium(III)–Porphyrin-Based Metal–Organic Framework

Chen

et al. 2022

ACS Catal.

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Hydrosilanes are useful precursors for the preparation of many different silicon-containing molecules, and they are transformed into value-added molecules generally through Si–H bond activation. Herein, we report the synthesis of a series of porphyrinic metal–organic framework (MOF) composites that were encapsulated with bimetallic PtCu nanowires (PtCu@Ir-PCN-222) and their catalytic performances toward Si–H bond functionalization. Catalytic results showed that PtCu@Ir-PCN-222 was efficient for the hydrolytic oxidation of hydrosilane and CO2 hydrosilylation. Especially, the turnover number in PtCu@Ir-PCN-222-catalyzed hydrosilane oxidation was up to 27,857 based on Pt. Theoretical studies disclosed that Ir(III) porphyrin might interact with hydrosilane via a η2-(H–Si) coordination model, and meanwhile, PtCu alloys displayed higher Si–H activation ability than the sole Pt nanoparticles because of the well-tuned Pt and Cu electronic structures in the bimetallic PtCu nanowires.

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Section: Introductionmentioning

confidence: 99%

PtCu@Ir-PCN-222: Synergistic Catalysis of Bimetallic PtCu Nanowires in Hydrosilane-Concentrated Interspaces of an Iridium(III)–Porphyrin-Based Metal–Organic Framework

Chen

et al. 2022

ACS Catal.

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“…Hyperbranched polysiloxane (HBPSi) as a novel unconventional fluorescent polymer has attracted increased attention due to its potential applications in biosensors, drug delivery, and chemical detection. ,− Moreover, its fluorescent property can be facilely adjusted by functionalization. ,, In this work, to decrease the steric hindrance and distance between electron-rich atoms and functional groups, a new HBPSi-NH 2 is synthesized from 1,3-propanediol and (3-aminopropyl)triethoxysilane via polycondensation reaction. To further enhance the fluorescence and adjust the emission color of HBPSi-NH 2 , β-cyclodextrin, an oxygen atom-rich and rigid molecule, was introduced onto HBPSi-NH 2 (HBPSi-β-CD).…”

Section: Introductionmentioning

confidence: 99%

Truly Multicolor Emissive Hyperbranched Polysiloxane: Synthesis, Mechanism Study, and Visualization of Controlled Drug Release

et al. 2022

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Unconventional fluorescent polymers have attracted increasing attention due to their facile synthesis, excellent biocompatibility, and novel photophysical properties. In this work, a truly multicolor emissive hyperbranched polysiloxane (HBPSi-β-CD) is obtained through adjusting the distribution of electron-rich atoms and grafting β-cyclodextrin; the quantum yields of HBPSi-β-CD after being excited by 360, 420, 450, and 550 nm are 19.36, 31.46, 46.14 and 44.84%, respectively. The density functional theory calculations reveal that the truly multicolor emission is derived from the formed electron delocalization among the hydroxyl, amine, ether, and −Si(O)3 groups due to the strong intermolecular interaction, high density of electron-rich atoms, and low steric hindrance among functional groups. The prepared polymers could serve as a multisensitivity sensor in detecting Fe3+, Cu2+, and Co2+. The HBPSi-β-CD shows low cytotoxicity and excellent cellular imaging capability. The self-assembly of HBPSi-β-CD also possesses high drug loading capacity and pH-controlled drug release, especially, the drug delivery system could be applied in the visualization of controlled drug delivery.

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“…There are many successful examples of preparations of luminescent materials based on various architectures of organosilicon compounds. Thus, linear polysiloxanes, hyperbranched organosilicones, and polyhedral oligomeric silsesquioxane (POSS) derivatives could be utilized for the preparation of unconventional fluorescent materials [36]. Luminescent polysiloxanes can possess self-healing properties [37][38][39] can be applied in photonics [40,41] and as sensing devices for detecting nitroaromatic compounds [42] or oxygen [43,44].…”

Section: Introductionmentioning

confidence: 99%

Cross-Linked Luminescent Polymers Based on β-Diketone-Modified Polysiloxanes and Organoeuropiumsiloxanes

et al. 2022

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Nowadays, luminescent materials attract wide attention due to their valuable characteristics and broad area of potential application. Luminescent silicone-based polymers possess unique properties, such as flexibility, hydrophobicity, thermal and chemical stabilities, etc., which allow them to be utilized in various fields, such as optoelectronics, solid-state lasers, luminescent solar concentrators, sensors, and others. In the present work, a metal-ligand interaction approach was applied to obtain new cross-linked luminescent polymers based on multiligand polysiloxanes with grafted β-diketone fragments and organoeuropiumsiloxanes containing various organic substituents. Organoeuropiumsiloxanes were utilized as a source of Eu3+ ions due to their compatibility with the silicon matrix. All synthesized polymers were fully characterized and their physicochemical, mechanical, self-healing, optical, and thermal properties were studied.

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Silicon-assisted unconventional fluorescence from organosilicon materials

Cited by 52 publications

References 67 publications

PtCu@Ir-PCN-222: Synergistic Catalysis of Bimetallic PtCu Nanowires in Hydrosilane-Concentrated Interspaces of an Iridium(III)–Porphyrin-Based Metal–Organic Framework

PtCu@Ir-PCN-222: Synergistic Catalysis of Bimetallic PtCu Nanowires in Hydrosilane-Concentrated Interspaces of an Iridium(III)–Porphyrin-Based Metal–Organic Framework

Truly Multicolor Emissive Hyperbranched Polysiloxane: Synthesis, Mechanism Study, and Visualization of Controlled Drug Release

Cross-Linked Luminescent Polymers Based on β-Diketone-Modified Polysiloxanes and Organoeuropiumsiloxanes

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