Reversible Luminescent Switching in a [Eu(SiW10MoO39)2]13−‐Agarose Composite Film by Photosensitive Intramolecular Energy Transfer

Wang, Zhongliang; Ma, Ying; Zhang, Ruili; Peng, Aidong; Liao, Qing; Cao, Zongwei; Fu, Hongbing; Yao, Jiannian

doi:10.1002/adma.200803321

Cited by 86 publications

(61 citation statements)

References 41 publications

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“…It had been reported from the crystal structure that the EuSiWMo was just like a dumbbell with a size of 1−2 nm. 28,39 So the bigger dots (2.70 nm) were the aggregative EuSiWMo, and the smaller dots were the disperse ones, which was consistent with the lifetime results of 30.0 μM EuSiWMo.…”

Section: Langmuirsupporting

confidence: 89%

A Two-Step Binding Process of Eu-Containing Polyoxometalates to Bovine Serum Albumin

Gao

Zhang

et al. 2015

Langmuir

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Polyoxometalates (POMs) represent a type of typical polyanionic nanoclusters that can be utilized as inorganic bioactive materials; however, the detailed interactions of them with many target biomolecules such as peptides and proteins were not well clarified due to the complexity of the binding process. In the present study, the binding-induced physiochemical phenomena of a highly charged Eu-containing polyoxometalate, K13[Eu(SiW9Mo2O39)2] (EuSiWMo), with a model protein, bovine serum albumin (BSA), was identified upon the examination of luminescence of both the components during the titration. The large emission enhancement and subsequent quenching of the EuSiWMo were found in close relation to the amount of added BSA. Being different from the known binding type of less charged POMs, a distinct two-step binding process was concluded, and the possible mechanism was proposed through the analysis on the time-resolved fluorescence spectra, isothermal titration calorimetry (ITC), transmission electron microscope (TEM), and two-dimensional correlation spectroscopy (2D COS). The present results directed a new understanding for the charge numbers and existing state of POMs affecting the interaction with proteins, which is important to exploit the biological functionalities of POMs in related systems and the development of POMs as potential inorganic drugs.

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Section: Langmuirsupporting

confidence: 89%

A Two-Step Binding Process of Eu-Containing Polyoxometalates to Bovine Serum Albumin

Gao

Zhang

et al. 2015

Langmuir

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“…The combined analytical data confirmed that our synthetic strategy afforded POM-polymer conjugates TBA 7 …”

supporting

confidence: 79%

“…Our concept will provide chemists with a new tool to design POMs whose solubility is reversibly controllable through an external stimulus. POM-polymer TBA 7 . Extensive MS analysis was used to monitor the chain-functionalization steps and to confirm the formation of the hybrid.…”

Section: Introductionmentioning

confidence: 99%

“…[6] The strategies used for their preparation have been based on physical blending (however the hybrids lack stability), [7] electrostatic interactions (limited to positively charged polyelectrolytes), [8] physical encapsulation (through ionic interactions) of POMs by in situ polymerization of cationic surfactants bearing polymerizable groups, [9,10] and the covalent bonding of both partners. This last strategy is especially appealing as it is versatile and guarantees the chemical stability of the resulting hybrids.…”

Section: Introductionmentioning

confidence: 99%

“…PDEAAm-NH 2 4 revealed a transition temperature at 43 8C (second heating scan), which corresponded a coil-globule transition owing to the rupture of (polymer À solvent) H-bonds, thereby resulting in favored polymer À polymer interactions compared to polymer À solvent interactions. For POM-polymer hybrid (NH 4 ) 7 …”

mentioning

confidence: 99%

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Synthesis and Characterization of a Thermoresponsive Polyoxometalate–Polymer Hybrid

Rieger

Antoun

Lee

et al. 2012

Chemistry A European J

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We report the synthesis of the first organo-POM with thermoresponsive properties. Our concept will provide chemists with a new tool to design POMs whose solubility is reversibly controllable through an external stimulus. POM-polymer TBA(7)[POM]-poly(N,N-diethylacrylamide) (POM-PDEAAm), was prepared by grafting PDEAAm-NH(2) (obtained by RAFT polymerization) onto the activated Dawson acyl-POM, α(2)-[P(2)W(17)O(61)SnCH(2)CH(2)C(=O)](6-). Extensive MS analysis was used to monitor the chain-functionalization steps and to confirm the formation of the hybrid. Aqueous solutions of the (NH(4))(7)[POM-PDEAAm] exhibited a LCST of 38 °C. Thus, the solubility/aggregation of the hybrid was reversibly controlled by changing the temperature. Above 38 °C, the solution became cloudy, and cleared again upon cooling. Dynamic light scattering (DLS) revealed the formation of small aggregates in the range 100 nm. We assumed that the charged POM head units prevented the formation of the larger-scattering aggregates that are usually observed for PDEAAm, and promoted the formation of micelle-like structures. The conjugate exhibited a temperature transition, which was different from that of the polymer and depended on the counterions associated with the POM. This result demonstrates the potential for merging organic (in this case, polymer) and inorganic structures to afford materials that exhibit new properties.

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Redox‐Modulated Circularly Polarized Luminescence in Chiral Photonic Films Derived from Cellulose Nanocrystals and Polyoxometalate

Zhang

Niu

Yang

et al. 2023

Advanced Optical Materials

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Achieving smart circularly polarized luminescence (CPL) materials with large luminescence dissymmetry factor (glum) is in high demand for potential technological applications in the chiroptical fields. Herein, a series of chiral photonic crystals (CPCs) derived from cellulose nanocrystals (CNCs) and photosensitive inorganic polyoxometalates (POMs) through an evaporation‐induced self‐assembly strategy are reported. The photonic bandgaps (PBGs) of CPC films are well regulated by controlling the amount of doped POMs, yielding the tunable right‐handed CPL emission with tailored glum. By locating the maximum emission peak of POMs at the center of the PBG of CPC films, the composite shows remarkable CPL performance with a |glum| value up to 0.53. Furthermore, the CPL can be reversibly switched on/off through a fluorescence resonance energy transfer (FRET) process controlled by alternate UV irradiation reduction and air oxidation. The CPC films hold the great promise as next‐generation chiroptical memory devices.

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Reversible Luminescent Switching in a [Eu(SiW₁₀MoO₃₉)₂]¹³⁻‐Agarose Composite Film by Photosensitive Intramolecular Energy Transfer

Cited by 86 publications

References 41 publications

A Two-Step Binding Process of Eu-Containing Polyoxometalates to Bovine Serum Albumin

A Two-Step Binding Process of Eu-Containing Polyoxometalates to Bovine Serum Albumin

Synthesis and Characterization of a Thermoresponsive Polyoxometalate–Polymer Hybrid

Redox‐Modulated Circularly Polarized Luminescence in Chiral Photonic Films Derived from Cellulose Nanocrystals and Polyoxometalate

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