Enhanced Resonance Energy Transfer and White-Light Emission from Organic Fluorophores and Lanthanides in Dendron-based Hybrid Hydrogel

Kumar, Prashant; Soumya, S.; Prasad, Edamana

doi:10.1021/acsami.6b00018

Cited by 63 publications

(46 citation statements)

References 56 publications

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“…In each of the branching points, there is a tertiary amine. 26,27 For example, Kumar et al constructed a white-light emitting gel using the FRET from organic donors to lanthanide ions. 31,32 The fluorescence spectrum of HPAMAM shown in Figure 2(d) indicates that the emission peak appears at $450 nm as the excitation wavelength is 365 nm.…”

Section: Resultsmentioning

confidence: 99%

“…It is thought that the tertiary amines are the origin of fluorescence of HPAMAMs. 27 In this work, the blue-light emitting HPAMAM is blended with chromophores that can absorb blue-light and therefore emit green and red light, respectively. It is a blue light.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the first goal of our work is to determine the FRET between HPAMAM and VB 2 . 27 RhB is a commonly used organic dye. As indicated in Figure 3(a), it can be seen that the absorption band of VB 2 overlaps with the emission band of HPAMAM in large area fraction.…”

Section: Resultsmentioning

confidence: 99%

“…One feasible solution is to integrate the luminescent components with flexible polymers, like poly(dimethyl siloxane) or poly(vinyl alcohol). 26,27 Moreover, the HPAMAMs have strong affinity to the nanoclays. The obtained films were very flexible and able to emit purely white light.…”

Section: Introductionmentioning

confidence: 99%

“…[23][24][25] They can emit strong blue fluorescence under UV irradiation, which is essential to the WLEMs. 26,27 Moreover, the HPAMAMs have strong affinity to the nanoclays. [28][29][30] Our group has utilized the HPAMAM to fabricate fluorescent hybrid films.…”

Section: Introductionmentioning

confidence: 99%

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White‐light‐emitting hybrid film from fluorescent hyperbranched poly(amido amine)

Yang

Wang

et al. 2017

J of Applied Polymer Sci

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The flexible, strong, and tough white-light-emitting (WLE) hybrid films are highly demanded in large-scale displays, including TV sets, monitors, and electronic interactive devices. In this work, a kind of WLE hybrid film was fabricated from hyperbranched poly(amido amine) (HPAMAM) and nanoclay with the incorporation of riboflavin (VB 2 ) and rhodamine B (RhB). The fluorescence emission of HPAMAM was partially absorbed and effectively transferred into green and red color, which combined into a bright white light with the residue blue fluorescence. Due to the alignment of nanoclay inside the HPAMAM matrix, in addition to the strong interaction among the HPAMAM molecules and that between HPAMAM and nanoclay, this hybrid film shows to be strong and tough. The mechanical strength is about 20 MPa and the elongation is about 30%. It is convinced that this hybrid film is promising in flexible large-scale displays.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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White‐light‐emitting hybrid film from fluorescent hyperbranched poly(amido amine)

Yang

Wang

et al. 2017

J of Applied Polymer Sci

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Protein Biophosphors: Biodegradable, Multifunctional, Protein‐Based Hydrogel for White Emission, Sensing, and pH Detection

Benson

Ghimire

Pattammattel

et al. 2017

Adv Funct Materials

108

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A highly efficient, multifunctional, bioderived white-emitting hydrogel (biophosphor) consisting of crosslinked bovine serum albumin and three fluorescent dyes, Coumarin 460, fluorescein, and 5(6)-carboxy-x-rhodamine, is reported here. White emission is obtained upon excitation of the biophosphor at 365 nm with appropriate mole ratios of the above dyes. The CIE 1931 chromaticity coordinates of white emission with 365 nm excitation are (0.36, 0.37), and the correlated color temperature is 5300 K. Multifunctional nature of the biophosphor is also demonstrated. A UV-light-emitting-diode (361 nm) coated with this biophosphor, for example, indicates white emission (CIE 0.28, 0.31) with a half-life of 106 (±5) h. The white emission is also highly sensitive to pH over a broad range (pH 1-11). Incorporation of glucose oxidase and peroxidase in the biophosphor allows for the detection of glucose over a physiologically relevant range of 1.8-288 mg dL −1 . This is a unique, advanced biophosphor with LED and sensing applications, and it is the first example of a multifunctional, proteinaceous white emitter. molar absorptivity and quantum efficiency of emissive components is a significant challenge for systems that combine direct emission and sensitized emission via Förster resonance energy transfer (FRET) to produce white light. [6,7] Hydrogels are hydrophilic polymer networks [8] and are emerging as versatile new matrices for high-efficiency generation of white light using intermolecular energy transfer processes. The gel matrix improves energy transfer efficiency by rigidifying the orientation of the donor (D)-acceptor (A) pairs [9] and preventing their aggregation, which can lead to quenching. [10] Despite the advantageous properties of white-emitting hydrogels, implementation in a functional device and photostability were not systematically studied, and biodegradability has not been demonstrated. Additionally, white-emitting proteinbased hydrogels are not known other than a report of a gelatin hydrogel with chromaticity coordinates [0.26, 0.33], far from being coordinates of pure white emission [0.33, 0.33]. [2] To the best of our knowledge, there are no reports of a multifunctional, nontoxic, biodegradable, white-emitting protein hydrogel.BSA is inexpensive and readily available as a waste product of the meat industry. BSA has a large number of primary amines (59 lysine) and carboxylic acids (99 aspartic acid/glutamic acid), [11] which can be crosslinked under controlled conditions by carbodiimide chemistry to form a network of amide bonds without disrupting the intricate secondary structure of the protein. [12,13] The protein's secondary structure plays an important role for dye binding at the intended site and for enzyme activity retention, when enzymes are incorporated in the matrix for sensing or catalytic applications. We envisioned that this molecular network of BSA would result in a water-rich hydrogel with discrete sites for dye binding which would be suitable for the construction of a white-emitting gel.Previou...

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Metallogels: Availability, Applicability, and Advanceability

et al. 2019

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amount of cross-linked solid. According to the nature of solvents, gels are categorized into hydrogel and organogel to indicate whether the solvent is water or organic solvent(s), respectively. As to the gelation driving forces, gels can be classified into physical gels in which intermolecular interactions are responsible for gel formation, and chemical gels in which the gel skeleton is cross-linked by covalent bonds.Incorporation of metal components (metal ions, metal-organic molecules, and metal nanoparticles) is an effective way to locally establish extra interactions among the building blocks and consequently trigger gel formation, [2][3][4] weaken [5] or enhance [6] gel strength, and modify gel morphology. [7,8] Moreover, addition of metal components is a straightforward way to integrate the specific properties of metals with the properties of organic matrix, therefore to tune properties like conductivity, [9] color, [10,11] rheological behavior, [12] adsorption, [13] emission, [14] photophysical properties, [15] magnetism, [16,17] antibacterial activities, [18,19] catalytic activities, [20][21][22][23] redox activities, [24,25] and selfhealing properties. [26][27][28] Therefore, a broad response range to physical and chemical stimuli can be achieved. For instance, the incorporation of multivalence ions such as Fe 2+ /Fe 3+ , [25,29] Co 2+ / Co 3+ , [30] Cu + /Cu 2+ , [31] results in redox reactive hydrogels; the incorporation of magnetic nanoparticles like Fe 3 O 4[17] causes the gel to respond to external magnetic fields. In addition to the abovementioned intrinsically functional superiorities, metallogels can also serve as ideal templates to generate new materials, [13,22,23,32,33] such as 3D networks, [34] porous structures, [35] chiral materials, [36][37][38] quantum dots, [39] and nanorods. [40] Following the rapid advancement of exploration on the knowledge acquisition toward the major roles that metallogels are playing in catalysis, sensing, biomedicine, electronics, and optical devices, the focus of research has been transferred to the design principles of metallogels in the last decade. Owing to the advancements in the instrumental characterizations and theoretical calculations, [41] a number of pioneering efforts on metallogel design have been made and several innovative reviews have summarized these inspiring contributions. [32,[42][43][44] Despite their extensively acknowledged application advantages in many fields, the discovery of new metallogels with expected functionalities is still highly dependent on experimental screening and serendipity. The challenge stems from the susceptible balance among those complicated intermolecular interactions and the elaborate structure requirements of metallogels.Another research niche that needs to be clarified before discussing recent development of metallogels is: how to sort Introducing metal components into gel matrices provides an effective strategy to develop soft materials with advantageous properties such as: optical activity, conductivity, magn...

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Enhanced Resonance Energy Transfer and White-Light Emission from Organic Fluorophores and Lanthanides in Dendron-based Hybrid Hydrogel

Cited by 63 publications

References 56 publications

White‐light‐emitting hybrid film from fluorescent hyperbranched poly(amido amine)

White‐light‐emitting hybrid film from fluorescent hyperbranched poly(amido amine)

Protein Biophosphors: Biodegradable, Multifunctional, Protein‐Based Hydrogel for White Emission, Sensing, and pH Detection

Metallogels: Availability, Applicability, and Advanceability

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