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

Variables Affecting Phosphorescence and Fluorescence01:26

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...
Five-Membered Heterocyclic Aromatic Compounds: Overview01:13

Five-Membered Heterocyclic Aromatic Compounds: Overview

Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom, respectively.
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Photoluminescence: Applications01:14

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...
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.

You might also read

Related Articles

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

Sort by
Same author

Screening of hepatotoxic components of Epimedium brevicornu Maxim. by liver microfluidic-organ-chip: Icariside Ⅱ induces hepatocyte apoptosis via ROS-mediated mitochondrial dysfunction and the p38 MAPK pathway.

Journal of ethnopharmacology·2026
Same author

Attenuated Salmonella typhimurium L-forms combined with lentiviral shRNA-HOTAIR suppress tumorigenicity and aggressiveness of murine breast cancer by inhibiting EGFR/Snail/MMP9 pathway.

European journal of pharmacology·2026
Same author

PRKCA and ABCB1 dual-enriched exosomes are key drivers of drug resistance in chronic myeloid leukemia.

Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy·2026
Same author

A Facile Synthetic Approach to Obtain Circularly Polarized Luminescence-Active AIEgens with High Luminescent Dissymmetry Factors.

Organic letters·2026
Same author

Aggregation-induced emission luminogen in ternary organic bulk-heterojunction for efficient perovskite-organic tandem solar cells.

Nature communications·2026
Same author

Pretreatment intratumoral mature TLSs in non-clear cell renal cell carcinoma are associated with response to immunotherapy rechallenge.

Journal for immunotherapy of cancer·2026

Related Experiment Video

Updated: Jul 16, 2026

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
14:11

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach

Published on: June 10, 2021

Pyrene-Fused Xanthone Derivatives: Synthesis, Emission Properties and Stimuli-Responsive Behavior.

Zihao Tang1, Xiaoxuan Lin1, Shan Liang1

  • 1School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, P. R. China.

Organic Letters
|July 15, 2026
PubMed
Summary

Researchers developed new pyrene-fused xanthone derivatives with tunable, color-changing emissions. These novel compounds show promise for applications in materials science due to their acid-responsive optical properties.

More Related Videos

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
08:51

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core

Published on: October 24, 2017

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
06:08

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

Published on: December 27, 2018

Related Experiment Videos

Last Updated: Jul 16, 2026

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
14:11

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach

Published on: June 10, 2021

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
08:51

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core

Published on: October 24, 2017

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
06:08

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

Published on: December 27, 2018

Area of Science:

  • Organic Chemistry
  • Materials Science
  • Photophysics

Background:

  • Pyrene derivatives are widely studied for their unique photophysical properties.
  • Xanthone scaffolds are known for their thermal stability and fluorescence.
  • Expanding π-conjugation in organic molecules can tune their electronic and optical characteristics.

Purpose of the Study:

  • To synthesize novel pyrene-fused xanthone derivatives.
  • To investigate the effect of extended π-conjugation on the photophysical properties of pyrene-xanthone systems.
  • To explore the emission behavior of these compounds in the aggregated state and their response to acidic conditions.

Main Methods:

  • Facile molecular strategy involving acid-catalyzed cyclization.
  • Suzuki-Miyaura coupling for introducing functional groups.
  • Spectroscopic analysis to study emission properties.

Main Results:

  • Successful synthesis of a series of novel pyrene-fused xanthone derivatives.
  • Demonstrated terminal group-dependent, color-tunable emission in the aggregated state.
  • Observed acid-responsive emission behavior in the synthesized compounds.

Conclusions:

  • The developed molecular strategy effectively expands the π-conjugation of pyrene.
  • Pyrene-fused xanthones exhibit tunable and responsive photoluminescence.
  • These findings open avenues for designing advanced functional materials with tailored optical responses.