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Related Concept Videos

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry01:29

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
Stereoisomerism02:52

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Directing and Steric Effects in Disubstituted Benzene Derivatives01:18

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When disubstituted benzenes undergo electrophilic substitution, the product distribution depends on the directing effect of both substituents. When the directing effects of both substituents reinforce each other, a single product is obtained. For example, bromination of p-nitrotoluene occurs ortho to the methyl group and meta to the nitro group, which is the same position, resulting in a single product. However, if the directing effects of the two groups oppose each other, the more strongly...
Stability of Conjugated Dienes01:28

Stability of Conjugated Dienes

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[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement01:21

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Halogenation of Alkenes02:46

Halogenation of Alkenes

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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
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Ladder-type P,S-bridged trans-stilbenes.

Wannes Weymiens1, Mark Zaal, J Chris Slootweg

  • 1Department of Chemistry and Pharmaceutical Sciences, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands.

Inorganic Chemistry
|July 29, 2011
PubMed
Summary

Researchers developed a new synthesis for asymmetric P-bridged trans-stilbenes, enhancing their electronic material potential. Planarization of the phosphorus center fine-tuned photophysical properties for advanced fluorescent molecular frameworks.

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Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
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Published on: November 22, 2016

Area of Science:

  • Organic Chemistry
  • Materials Science
  • Photophysics

Background:

  • Phosphole-containing π-systems are promising electronic materials due to tunable phosphorus centers.
  • Asymmetric P-bridged trans-stilbenes are underexplored building blocks for advanced materials.

Purpose of the Study:

  • To develop an efficient synthesis for novel asymmetric P-bridged trans-stilbenes.
  • To investigate the impact of phosphorus center planarization on photophysical properties.
  • To analyze the electronic structure of these π-conjugated systems.

Main Methods:

  • Elegant and efficient synthetic route for P-bridged trans-stilbenes.
  • Photophysical property tuning via phosphorus tripod planarization.
  • Spectroscopic analysis including NMR, UV-vis, and fluorescence.
  • Computational analysis using time-dependent density functional theory (TD-DFT).

Main Results:

  • Successful synthesis of asymmetric P-bridged trans-stilbenes.
  • Demonstrated fine-tuning of photophysical properties through structural modification.
  • Established correlation between phosphorus lone pair-π-system interaction and electronic properties.
  • Detailed electronic structure analysis of the synthesized fluorescent molecular frameworks.

Conclusions:

  • The developed synthesis provides access to rare asymmetric P-bridged trans-stilbenes.
  • Planarization of the phosphorus center effectively modulates electronic and photophysical characteristics.
  • These findings pave the way for designing novel phosphole-based electronic and fluorescent materials.