Video Experimental Relacionado

Updated: Jul 18, 2026

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera

Published on: December 27, 2018

Luminiscencia tribocromismo y emisión brillante en oro (I) complejos de tiouracilato

Young-A Lee¹, Richard Eisenberg

¹Department of Chemistry, University of Rochester, Rochester, NY 14627, USA.

Journal of the American Chemical Society

|June 26, 2003

Resumen

Los nuevos complejos de oro (I) muestran luminiscencia sintonizable, que se enciende con la molienda y cambia con el pH. Estos compuestos dinucleares ofrecen potencial en aplicaciones de detección y emisiones de estado sólido.

Área de la Ciencia:

Química Inorgánica La Química Inorgánica es la química inorgánica.
Ciencia de los materiales Ciencia de los materiales.
La fotoquímica es la fotoquímica.

Sus antecedentes:

Los complejos dinucleares de oro ((I) se exploran para propiedades electrónicas y fotofísicas únicas.
El tiouracilato y los ligandos de bis ((difenilfosfino) metano ofrecen posibilidades versátiles de coordinación.
La luminiscencia en estado sólido y la sensibilidad al pH son rasgos deseables para materiales avanzados.

Objetivo del estudio:

Síntesis y caracterización de nuevos complejos dinucleares de oro.
Investigar su estado sólido luminiscencia tribocromismo.
Explorar su sensibilidad al pH en solución.

Principales métodos:

Síntesis de complejos dinucleares Au (I).
Caracterización estructural (por ejemplo, difracción de rayos X).
Análisis espectroscópico (por ejemplo, luminiscencia, RMN).

Principales resultados:

Los compuestos exhiben tribocromismo de luminiscencia en estado sólido (emisión encendida/apagada por molienda).
La forma emisora muestra una emisión azul brillante / cian (λex = 375 nm).
Los cambios estructurales se correlacionan con la luminiscencia: interacciones aurófilas débiles vs fuertes y arreglos helicoidales vs diméricos.

Conclusiones:

Los complejos dinucleares Au ((I) muestran luminiscencia sintonizable a través de la fuerza mecánica y el pH.
La interconversión entre estados emisores y no emisores es alcanzable.
Aplicaciones potenciales en materiales y sensores sensibles.

Más Videos Relacionados

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

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

Videos de Conceptos Relacionados

Colors and Magnetism

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.

Total Internal Reflection Fluorescence Microscopy

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...

Variables Affecting Phosphorescence and Fluorescence

Variables Affecting Phosphorescence and Fluorescence

Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...

Photoluminescence: Applications

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...