Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

550
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...
550
Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

911
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.
911
2° Amines to N-Nitrosamines: Reaction with NaNO201:20

2° Amines to N-Nitrosamines: Reaction with NaNO2

4.7K
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
4.7K
Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

653
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...
653
Other Nuclides: 31P, 19F, 15N NMR01:16

Other Nuclides: 31P, 19F, 15N NMR

492
Many organic, inorganic, and biological molecules contain spin-half nuclei such as nitrogen-15, fluorine-19, and phosphorus-31. As a result, NMR studies of these nuclei have found extensive applications in chemical and biological research.
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a...
492
Flame Photometry: Overview01:02

Flame Photometry: Overview

894
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...
894

You might also read

Related Articles

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

Sort by
Same author

Thiaheptapyrrin and Thiatetrapyrrin Armed p-Phenylene-Bridged Norrole as NIR-II Dyes: Photothermal Behavior Effectively Enhanced by Protonation and Deprotonation.

Chemistry, an Asian journal·2026
Same author

Interaction of Polymer of Intrinsic Microporosity PIM‑1 with Explosive Analytes at the Molecular Level: Combined Experiment and Computational Modeling.

The journal of physical chemistry. C, Nanomaterials and interfaces·2026
Same author

Structure of Fluoride Anion Aqueous Solution Derived from X-ray Spectroscopy.

The journal of physical chemistry. B·2026
Same author

Dipoles affect conformational equilibrium.

Journal of photochemistry and photobiology. A, Chemistry·2026
Same author

Single-molecule electrical characterization of photoinduced aggregation evolution.

Nature communications·2026
Same author

Synergistic Dual-Passivation via Indium Doping and Zwitterionic Ligands for Efficient Pure-Blue Perovskite Light-Emitting Diodes.

ACS applied materials & interfaces·2026
Same journal

Electronegative, Transparent, and Flexible Triboelectric Electrodes via Three-Dimensionally Stacked Interconnect Structure with Cross-Interface Electron Transport.

The journal of physical chemistry letters·2026
Same journal

Effects of Ether Bonds on Liquid-Liquid Transitions in Quaternary Ammonium and Phosphonium Ionic Liquids under High Pressure.

The journal of physical chemistry letters·2026
Same journal

Origins of Size-Dependent Kinetics in Microdroplets.

The journal of physical chemistry letters·2026
Same journal

Iso-Potential <i>Operando</i> Coupling of XRD and a Profile Reactor: Structural Insights into ZnPd/ZnO during Methanol Steam Reforming.

The journal of physical chemistry letters·2026
Same journal

Formation of Methanol Clathrate Hydrate in Simulated Interstellar Ices.

The journal of physical chemistry letters·2026
Same journal

Suppressing Residual Low-Dimensional Phases in Bromide Perovskite LEDs Using a Dimethyl Phosphate Ionic Liquid.

The journal of physical chemistry letters·2026
See all related articles

Related Experiment Video

Updated: Oct 16, 2025

Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes
12:07

Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes

Published on: April 1, 2013

17.3K

Making Nitronaphthalene Fluoresce.

Katarzyna Rybicka-Jasińska1, Eli M Espinoza2, John A Clark1

  • 1Department of Bioengineering, University of California, Riverside, California 92521, United States.

The Journal of Physical Chemistry Letters
|October 15, 2021
PubMed
Summary
This summary is machine-generated.

Researchers enhanced the fluorescence of nitroaromatic compounds by modifying 1-nitronaphthalene with amine or N-amide groups. This increases singlet excited-state lifetimes, enabling new applications for these electron-deficient organic materials.

More Related Videos

Synthesis and Calibration of Phosphorescent Nanoprobes for Oxygen Imaging in Biological Systems
10:38

Synthesis and Calibration of Phosphorescent Nanoprobes for Oxygen Imaging in Biological Systems

Published on: March 3, 2010

14.0K
A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
10:13

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

2.7K

Related Experiment Videos

Last Updated: Oct 16, 2025

Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes
12:07

Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes

Published on: April 1, 2013

17.3K
Synthesis and Calibration of Phosphorescent Nanoprobes for Oxygen Imaging in Biological Systems
10:38

Synthesis and Calibration of Phosphorescent Nanoprobes for Oxygen Imaging in Biological Systems

Published on: March 3, 2010

14.0K
A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
10:13

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

2.7K

Area of Science:

  • Organic Chemistry
  • Photochemistry
  • Materials Science

Background:

  • Nitroaromatic compounds are typically nonfluorescent due to short singlet excited-state lifetimes.
  • Small nitrated polycyclic aromatic hydrocarbons have limited use as photosensitizers or photo-oxidants despite favorable reduction potentials.

Purpose of the Study:

  • To investigate methods for increasing the singlet excited-state lifetime of 1-nitronaphthalene.
  • To explore the potential of modified nitronaphthalenes as fluorescent materials.

Main Methods:

  • Synthetically attaching amine or N-amide groups to the 1-nitronaphthalene core.
  • Investigating the influence of charge-transfer (CT) character and medium polarity on excited-state decay pathways.
  • Analyzing radiative and nonradiative decay rates, including intersystem crossing (ISC).

Main Results:

  • Achieved up to a 7000-fold increase in the singlet excited-state lifetime of 1-nitronaphthalene derivatives.
  • Demonstrated that amine substitution enhances CT pathways, while N-amide substitution effectively slows ISC.
  • Successfully induced fluorescence in nitronaphthalene derivatives by balancing decay rates.

Conclusions:

  • Modification of nitronaphthalene with amine or N-amide groups can significantly extend singlet excited-state lifetimes.
  • Tailoring CT character and medium polarity offers a strategy to control excited-state decay and achieve fluorescence.
  • These findings are crucial for developing electron-deficient (n-type) organic materials with desirable optical properties.