Related Experiment Video
Updated: Dec 22, 2025
08:44
Fabrication and Testing of Photonic Thermometers
Published on: October 24, 2018
6.2K
A difluoroboron β-diketonate based thermometer with temperature-dependent emission wavelength
Jian-Xin Wang1, Yi-Shuai Yu, Li-Ya Niu
1Key Laboratory of Radiopharmaceuticals Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China. qzyang@bnu.edu.cn.
Chemical Communications (Cambridge, England)
|May 7, 2020
Summary
New difluoroboron β-diketonate fluorophores change color with temperature, enabling easy and precise temperature measurements. This fluorescence shift from green to orange offers a novel sensing method.
Area of Science:
- Materials Science
- Photochemistry
- Chemical Sensing
Background:
- Temperature-dependent fluorescence is crucial for various sensing applications.
- Developing novel fluorophores with distinct optical responses is an active research area.
Purpose of the Study:
- To synthesize and characterize a series of difluoroboron β-diketonate fluorophores.
- To investigate the temperature-dependent emission properties of these novel fluorophores.
- To evaluate their potential for accurate temperature measurements.
Main Methods:
- Synthesis of difluoroboron β-diketonate compounds.
- Spectroscopic analysis (UV-Vis absorption and fluorescence emission).
- Temperature-dependent emission measurements.
Main Results:
- A series of difluoroboron β-diketonate fluorophores were successfully synthesized.
- These fluorophores exhibit a distinct temperature-dependent emission wavelength shift.
- Fluorescence emission changes from green to orange with increasing temperature.
- The observed changes allow for convenient and accurate temperature determination.
Conclusions:
- Difluoroboron β-diketonate fluorophores offer a promising platform for optical thermometry.
- The distinct color change provides a visual and quantitative method for temperature sensing.
- These findings open avenues for new temperature measurement technologies.
Related Concept Videos
01:25Fluorescence and Phosphorescence: Instrumentation
1.3K
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
1.3K
01:16Flame Photometry: Lab
735
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
735
01:27Atomic Spectroscopy: Effects of Temperature
781
Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
781
01:02Flame Photometry: Overview
1.3K
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
1.3K
01:29Atomic Fluorescence Spectroscopy
824
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...
824
01:25IR Spectrometers
2.1K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
2.1K