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

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction01:16

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

11.5K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
11.5K
UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

7.9K
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in...
7.9K
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

2.3K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
2.3K
Stability of Conjugated Dienes01:28

Stability of Conjugated Dienes

3.9K
Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
3.9K
Structure of Conjugated Dienes01:16

Structure of Conjugated Dienes

6.3K
Introduction
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
6.3K
Aromatic Hydrocarbon Anions: Structural Overview01:18

Aromatic Hydrocarbon Anions: Structural Overview

3.3K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
3.3K

You might also read

Related Articles

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

Sort by
Same author

The neurobiological regulatory mechanism of brain edema.

Frontiers in cellular neuroscience·2026
Same author

Molecular Response Mechanism of Potato Seedling Leaves under Nicotine Stress: Integration of Multiomics and Molecular Simulation Analysis.

Journal of agricultural and food chemistry·2026
Same author

Research Progress on the Physiological Functions of Aspartic Acid and Its Applications in Animal Production.

Animals : an open access journal from MDPI·2026
Same author

Incidence of acute exacerbation and its related factors among chronic obstructive pulmonary disease patients aged 40 years and older in China.

Chinese medical journal pulmonary and critical care medicine·2026
Same author

The semantic interplay of semantic radicals and host phonograms in chinese transparent character processing.

Cognitive processing·2026
Same author

Gut microbial metabolic disorder in depression: insights from computational modeling and mediation analysis.

BMC microbiology·2026
Same journal

Heterometallic ludwigite M<sub>2.5</sub>T<sub>0.5</sub>(O<sub>2</sub>BO<sub>3</sub>) and (M<sub>2</sub>T)(O<sub>2</sub>BO<sub>3</sub>) (M = Co, Ni, Cu; T = Ti, Sn, Fe) compounds as electrocatalysts.

Dalton transactions (Cambridge, England : 2003)·2026
Same journal

Copper(II) complexes for electrocatalytic dioxygen reduction: controlling selectivity <i>via</i> a proton relay mode.

Dalton transactions (Cambridge, England : 2003)·2026
Same journal

Single- and tri-doping strategies with Mn<sup>2+</sup>, Sn<sup>2+</sup>, and Pb<sup>2+</sup> in cadmium-based metal halides for primary-color and tunable white-light emission.

Dalton transactions (Cambridge, England : 2003)·2026
Same journal

Heterobimetallic aluminium/group 4 complexes derived from single-electron processes initiated by an aluminyl anion.

Dalton transactions (Cambridge, England : 2003)·2026
Same journal

Thermally tunable terahertz smart window based on VO<sub>2</sub> phase change material with broadband absorption and ultra-broadband transmission.

Dalton transactions (Cambridge, England : 2003)·2026
Same journal

Cation-templated synthesis of a Fe<sub>4</sub>Co<sub>20</sub> cyanometallate cluster.

Dalton transactions (Cambridge, England : 2003)·2026
See all related articles

Related Experiment Video

Updated: Nov 22, 2025

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

10.7K

Developing strong NIR absorption materials through linear planar π-conjugated cyclopalladated complex dimers.

Qi Luo1, Jing Zhang1, Jiangbin Xia2

  • 1Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China. jbxia@whu.edu.cn.

Dalton Transactions (Cambridge, England : 2003)
|January 8, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed novel near-infrared absorbing metal complexes (NIRMCs) using linear, large, planar π-conjugated cyclopalladated dimers. This offers a simpler alternative to traditional macrocyclic ligands for creating advanced NIR materials.

More Related Videos

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

17.4K
Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

9.0K

Related Experiment Videos

Last Updated: Nov 22, 2025

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

10.7K
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

17.4K
Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

9.0K

Area of Science:

  • Coordination Chemistry
  • Materials Science
  • Photophysics

Background:

  • Near-infrared absorbing metal complexes (NIRMCs) typically rely on complex π-expanded macrocyclic structures.
  • Existing macrocyclic ligands for NIRMCs present synthetic challenges and limited structural diversity.

Purpose of the Study:

  • To report a new class of NIRMCs utilizing linear, large, planar π-conjugated cyclopalladated dimers.
  • To establish a facile synthetic route for these novel NIRMCs.
  • To investigate their near-infrared absorption and emission properties.

Main Methods:

  • Synthesis of linear large planar π-conjugated cyclopalladated dimers via base-induced dimerization of monomers.
  • Spectroscopic analysis to determine NIR absorption and fluorescence emission characteristics.

Main Results:

  • The synthesized cyclopalladated dimers exhibit intense NIR absorption (ε770 nm = 2.5 × 105 cm-1 M-1).
  • These complexes display fluorescence emission peaks around 910 nm.
  • Quinoid thiophene methine (QTM) and the cyclopalladated structure are identified as key contributors to strong NIR absorption.

Conclusions:

  • A facile method for preparing NIRMCs based on cyclopalladated dimers has been developed, bypassing complex macrocyclic synthesis.
  • The findings provide a new structural paradigm for designing and synthesizing NIR absorption metal complexes.
  • These novel complexes hold potential for applications requiring strong NIR absorption and emission.