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Related Concept Videos

Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

6.1K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
6.1K
Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

4.8K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
4.8K
Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions01:20

Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions

1.9K
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
1.9K
Conjugate Addition to α,β-Unsaturated Carbonyl Compounds01:09

Conjugate Addition to α,β-Unsaturated Carbonyl Compounds

4.1K
α,β-Unsaturated carbonyl compounds are molecules bearing a carbonyl and alkene functionality in conjugation with each other. The conjugation in the molecule leads to three resonance structures. The hybrid form exhibits two probable electrophilic sites: the carbonyl carbon and the β carbon.
4.1K
Carbocations02:10

Carbocations

11.0K
Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an electron-deficient species with the central carbon atom having six electrons and three bonded atoms. The central carbon in a carbocation is sp2 hybridized with trigonal planar geometry. It has an empty p orbital perpendicular to the plane of the structure that can accept electrons. Thus, carbocations act as strong electrophiles and may react with any...
11.0K
Structure and Nomenclature of Thiols and Sulfides02:17

Structure and Nomenclature of Thiols and Sulfides

4.6K
Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...
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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
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Functionalizing Thiosemicarbazones for Covalent Conjugation.

Johannes Hohnsen1, Lukas Rryci1, Diana Obretenova1

  • 1University of Cologne, Faculty of Mathematics and Natural Sciences, Department of Chemistry and Biochemistry, Institute for Inorganic and Materials Chemistry, Greinstraße 6, 50939 Koeln, Germany.

Molecules (Basel, Switzerland)
|August 10, 2024
PubMed
Summary
This summary is machine-generated.

This study synthesizes novel thiosemicarbazone (TSC) derivatives for nanoparticle functionalization. These TSCs, featuring diverse substituents and anchor groups, enable direct nanoparticle anchoring and conjugation for advanced material applications.

Keywords:
amino acidsfunctionalizationglucoseo-hydroquinonephosphonatethiosemicarbazones

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Area of Science:

  • Materials Science
  • Organic Chemistry
  • Nanotechnology

Background:

  • Thiosemicarbazones (TSCs) offer modular synthesis for creating diverse molecular structures.
  • Their potential for nanoparticle (NP) functionalization and conjugate formation is significant.
  • Incorporating metal-coordinating and luminescent groups enhances TSC utility.

Purpose of the Study:

  • To synthesize novel thiosemicarbazone derivatives for nanoparticle functionalization and conjugation.
  • To introduce metal-coordinating (di-2-pyridyl ketone) and luminescent (9-anthraldehyde) moieties.
  • To explore various substituents at the N4 position for diverse applications, including direct NP anchoring.

Main Methods:

  • Synthesis of 34 new thiosemicarbazone derivatives through multi-step reactions.
  • Characterization using nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry.
  • Spectroscopic analysis (UV-vis absorption, photoluminescence) to confirm chromophore presence.

Main Results:

  • Successful synthesis of TSCs with amino acids, phosphonic acids, glucose, hydroquinone, and thiol groups.
  • Demonstrated direct anchoring of phenyl phosphonic acid TSC derivatives onto TiO2 nanoparticles.
  • Synthesized TSCs with various end groups (e.g., Boc, C≡CH, N3) for further covalent modification.

Conclusions:

  • Developed a versatile platform for synthesizing functionalized thiosemicarbazones.
  • Established a method for direct nanoparticle anchoring using TSC derivatives.
  • These novel TSC conjugates hold promise for advanced materials and bioconjugation applications.