Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

The Antenna Complex

The Antenna Complex

Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...

Channel Rhodopsins

Channel Rhodopsins

Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...

G-Protein Gated Ion Channels

G-Protein Gated Ion Channels

GPCRs are primarily responsible for our sense of smell, taste, and vision. The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...

Atomic Fluorescence Spectroscopy

Atomic Fluorescence Spectroscopy

Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...

The Electrical Double Layer

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...

Leveling Effect

Leveling Effect

In acid-base chemistry, the leveling effect refers to the limitation imposed by the solvent on the strength of acids and bases in solution. When a base stronger than the solvent's conjugate base is used, it deprotonates the solvent until the base is entirely consumed, making it ineffective against weaker acids. Conversely, an acid stronger than the solvent's conjugate acid protonates the solvent until the acid is depleted, rendering it ineffective against weaker bases. Essentially, the solvent...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Insight into the reactivity and antitumoral potential of allyl rhodanine derivatives: Azomethine ylide cycloadditions, molecular docking, and SAR studies.

Bioorganic chemistry·2026

Same author

Sustainable Sound Absorption: A Critical Review of Material Innovation and Geometry-Driven Design.

Polymers·2026

Same author

Phosphonates as Modulators of Brain Chemistry.

Medicinal research reviews·2026

Same author

Process Strategies Enabling Selective Polymer Valorization from Textile Fiber Blends.

Materials (Basel, Switzerland)·2026

Same author

Divergent Reactivity of Diketopyrrolopyrroles: Ring-Opening with Amines.

Organic letters·2026

Same author

Oxidant-Dependent Switch of a Molybdenum(VI) Tetrazolate Complex from a Homogeneous to a Self-Separating Catalyst for Olefin Epoxidation.

Industrial & engineering chemistry research·2026

Search research articles

Related Experiment Video

Updated: Jul 16, 2026

Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence

Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence

Published on: April 27, 2018

Photoluminescent layered lanthanide silicates.

Duarte Ananias¹, Mariya Kostova, Filipe A Almeida Paz

¹Contribution from the Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.

Journal of the American Chemical Society

|August 19, 2004

Summary

New layered lanthanide silicates (AV-22 materials) were synthesized and characterized. These materials exhibit tunable photoluminescence, with potential applications as phosphors in lighting technologies.

More Related Videos

Fluorescent Silver Staining of Proteins in Polyacrylamide Gels

Fluorescent Silver Staining of Proteins in Polyacrylamide Gels

Published on: April 21, 2019

Dynamic Light-Induced Protein Patterns at Model Membranes

Dynamic Light-Induced Protein Patterns at Model Membranes

Published on: February 23, 2024

Related Experiment Videos

Last Updated: Jul 16, 2026

Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence

Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence

Published on: April 27, 2018

Fluorescent Silver Staining of Proteins in Polyacrylamide Gels

Fluorescent Silver Staining of Proteins in Polyacrylamide Gels

Published on: April 21, 2019

Dynamic Light-Induced Protein Patterns at Model Membranes

Dynamic Light-Induced Protein Patterns at Model Membranes

Published on: February 23, 2024

Area of Science:

Materials Science
Inorganic Chemistry
Solid-State Chemistry

Background:

Lanthanide silicates are a class of materials with interesting optical properties.
Developing novel phosphors with tunable emission is crucial for advanced lighting applications.

Purpose of the Study:

To hydrothermally synthesize and structurally characterize novel layered lanthanide silicates, designated AV-22.
To investigate the photoluminescent properties of these AV-22 materials doped with various lanthanide ions.

Main Methods:

Single-crystal and powder X-ray diffraction for structural elucidation.
Chemical analysis, thermogravimetry, SEM, (29)Si MAS NMR, and photoluminescence spectroscopy for characterization.
Hydrothermal synthesis technique.

Main Results:

Successful synthesis of K(3)[M(1-a)Ln(a)Si(3)O(8)(OH)(2)] (AV-22) materials.
Er-AV-22 functions as a room-temperature infrared phosphor.
Tb- and Eu-AV-22 exhibit visible emission with efficiencies comparable to commercial standards.
Tunable photoluminescence achieved by incorporating multiple lanthanide ions.
Evidence of Tb(3+)-to-Eu(3+) energy transfer in mixed-doped materials.

Conclusions:

The layered AV-22 structure facilitates the incorporation of multiple lanthanide ions for fine-tuning luminescence.
These materials show promise for applications in lighting and display technologies.
Efficient energy transfer mechanisms were observed in co-doped AV-22 materials.