Fluorescence emission properties of rhodamine B encapsulated organic-inorganic hybrid mesoporous silica host

Rao, Honghong; Zhang, Xue; Zhao, Guohu; Li, Sheng-Ying; Du, Xiaoni

doi:10.1016/j.jnoncrysol.2016.07.037

Cited by 19 publications

(9 citation statements)

References 43 publications

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“…Figure ). − No significant emission was detected for the naphthalimide and rhodamine B derivatives when irradiated with X-rays (data not shown). It is obvious that the emission of LSO:Ce overlaps well with AlNap, and the emission of AlNap overlaps well with the absorbance of AlRhod.…”

Section: Resultsmentioning

confidence: 98%

Organic Fluorophore Coated Polycrystalline Ceramic LSO:Ce Scintillators for X-ray Bioimaging

et al. 2018

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The current effort demonstrates that lutetium oxyorthosilicate doped with 1–10% cerium (Lu2SiO5:Ce, LSO:Ce) radioluminescent particles can be coated with a single dye or multiple dyes and generate an effective energy transfer between the core and dye(s) when excited via X-rays. LSO:Ce particles were surface modified with an alkyne modified naphthalimide (6-piperidin-1-yl-2-prop-2-yn-1-yl-1H-benzo[de]isoquinoline-1,3-(2H)-dione, AlNap) and alkyne modified rhodamine B (N-(6-diethylamino)-9-{2-[(prop-2-yn-1-yloxy)carbonyl]phenyl}-3H-xanthen-3-ylidene)-N-ethylethanaminium, AlRhod) derivatives to tune the X-ray excited optical luminescence from blue to green to red using Förster Resonance Energy Transfer (FRET). As X-rays penetrate tissue much more effectively than UV/visible light, the fluorophore modified phosphors may have applications as bioimaging agents. To that end, the phosphors were incubated with rat cortical neurons and imaged after 24 h. The LSO:Ce surface modified with AlNap was able to be successfully imaged in vitro with a low-output X-ray tube. To use the LSO:Ce fluorophore modified particles as imaging agents, they must not induce cytotoxicity. Neither LSO:Ce nor LSO:Ce modified with AlNap showed any cytotoxicity toward normal human dermal fibroblast cells or mouse cortical neurons, respectively.

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Section: Resultsmentioning

confidence: 98%

Organic Fluorophore Coated Polycrystalline Ceramic LSO:Ce Scintillators for X-ray Bioimaging

et al. 2018

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“…The use of a bi‐exponential function to fit decay curves of emitting guests in solid hosts is well documented for a number of emitters including, conjugated polymers, [ 20,40 ] quantum dots, [ 41 ] and also Rhodamine B molecules adsorbed via direct infiltration on porous silica nanoparticles prepared by chemical synthesis. [ 42,43 ] In the latter, the shorter decay time is assigned to the fraction of RhoB molecules that are uniformly dispersed in the pores and have weak interaction with the SiO 2 nanostructure surface; the longer decay time is explained in terms of stronger interaction of RhoB molecules with the SiO 2 nanostructure surface. This is consistent with the electrostatic assembling of RhoB molecules covalently‐bound to a PAH polyelectrolyte on the nanostructured PSiO 2 surface.…”

Section: Resultsmentioning

confidence: 99%

Nanoscale Photoluminescence Manipulation in Monolithic Porous Silicon Oxide Microcavity Coated with Rhodamine‐Labeled Polyelectrolyte via Electrostatic Nanoassembling

Chen

Robbiano

Paternò

et al. 2021

Advanced Optical Materials

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Porous silicon (PSi) is a promising material for future integrated nanophotonics when coupled with guest emitters, still facing challenges in terms of homogenous distribution and nanometric thickness of the emitter coating within the silicon nanostructure. Herein, it is shown that the nanopore surface of a porous silicon oxide (PSiO2) microcavity (MC) can be conformally coated with a uniform nm‐thick layer of a cationic light‐emitting polyelectrolyte, e.g., poly(allylamine hydrochloride) labeled with Rhodamine B (PAH‐RhoB), leveraging the self‐tuned electrostatic interaction of the positively‐charged PAH‐RhoB polymer and negatively‐charged PSiO2 surface. It is found that the emission of PAH‐RhoB in the PSiO2 MC is enhanced (≈2.5×) and narrowed (≈30×) at the resonant wavelength, compared with that of PAH‐RhoB in a non‐resonant PSiO2 reference structure. The time‐resolved photoluminescence analysis highlights a shortening (≈20%) of the PAH‐RhoB emission lifetime in the PSiO2 MC at the resonance versus off‐resonance wavelengths, and with respect to the reference structure, thereby proving a significant variation of the radiative decay rate. Remarkably, an experimental Purcell factor Fp = 2.82 is achieved. This is further confirmed by the enhancement of the photoluminescence quantum yield of the PAH‐RhoB in the PSiO2 MC with respect to the reference structure. Application of the electrostatic nanoassembling approach to other emitting dyes, nanomaterials, and nanophotonic systems is envisaged.

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“…Du et al ., functionalized mesoporous nanoparticles using two types of bromo‐tetraphenylethene derivatives and explored their luminescence properties. They found that the materials showed strong blue fluorescence . These functionalized materials were found to be the potential candidates for the selective sensing of nitroarenes explosives and antibiotics with low detection limits.…”

Section: Synthesis Of Organo‐functionalized Molecular Sievesmentioning

confidence: 99%

“…The high sensing capability of these fluorescent chemosensors based on functionalized mesoporous materials can be attributed to the photo‐induced energy transfer quenching. Fluorescence properties could be introduced in the pure and phenyl substituted MCM‐41 with Rhodamine B (RhB) molecules . It was reported that the surface charge on the walls, which could dictate the interaction between the surface functional groups of MCM‐41 and RhB, is a crucial element that controls the intensity of fluorescence.…”

Section: Synthesis Of Organo‐functionalized Molecular Sievesmentioning

confidence: 99%

Recent Advances in the Preparation and Applications of Organo‐functionalized Porous Materials

Yadav

Baskaran

Anjali

et al. 2020

Chemistry An Asian Journal

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Organo‐functionalized materials with porous structure offer unique adsorption, catalytic and sensing properties. These unique properties make them available for various applications, including catalysis, CO2 capture and utilization, and drug delivery. The properties and the performance of these unique materials can be altered with suitable modifications on their surface. In this review, we summarize the recent advances in the preparation and applications of organo‐functionalized porous materials with different structures. Initially, a brief historical overview of functionalized porous materials is presented, and the subsequent sections discuss the recent developments and applications of various functional porous materials. In particular, the focus is given on the various methods used for the preparation of organo‐functionalized materials and their important roles in the heterogenization of homogeneous catalysts. A special emphasis is also given on the applications of these functionalized porous materials for catalysis, CO2 capture and drug delivery.

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Fluorescence emission properties of rhodamine B encapsulated organic-inorganic hybrid mesoporous silica host

Cited by 19 publications

References 43 publications

Organic Fluorophore Coated Polycrystalline Ceramic LSO:Ce Scintillators for X-ray Bioimaging

Organic Fluorophore Coated Polycrystalline Ceramic LSO:Ce Scintillators for X-ray Bioimaging

Nanoscale Photoluminescence Manipulation in Monolithic Porous Silicon Oxide Microcavity Coated with Rhodamine‐Labeled Polyelectrolyte via Electrostatic Nanoassembling

Recent Advances in the Preparation and Applications of Organo‐functionalized Porous Materials

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