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Related Concept Videos

The Phosphorus Cycle01:21

The Phosphorus Cycle

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Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
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Factors Affecting Solubility04:01

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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
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Roles of Electrolytes: Calcium and Phosphate01:27

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Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
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Phosphoinositides and PIPs01:42

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Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
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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...
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Coagulation01:06

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Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
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Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
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A Highly Emissive Water-Soluble Phosphorus Corrole.

Mario L Naitana1, Sara Nardis1, Giuseppe Pomarico1

  • 1Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata", Via della Ricerca, Scientifica 1, 00133, Rome, Italy.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|October 28, 2016
PubMed
Summary

Researchers synthesized a water-soluble phosphorus corrole complex with excellent optical properties. This novel synthesis offers regioselective control, yielding a stable hexacoordinated complex with potential applications in materials science.

Keywords:
corrolephosphorusporphyrinoidsscanning probe microscopysulfonation

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Area of Science:

  • Coordination Chemistry
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Corrole complexes are known for their unique optical and electronic properties.
  • Controlling the substitution pattern and aggregation of corrole molecules is crucial for their applications.
  • Water-soluble corrole derivatives are desirable for biological and sensing applications.

Purpose of the Study:

  • To synthesize and characterize a novel water-soluble phosphorus corrole complex.
  • To investigate the role of phosphorus coordination in controlling corrole regioselectivity and substitution.
  • To explore the optical properties and self-assembly behavior of the synthesized complex.

Main Methods:

  • Novel corrole sulfonation strategy for regioselective synthesis.
  • Spectroscopic analysis (including 31P NMR) to determine structure and coordination.
  • Optical property measurements (emission quantum yield).
  • Morphological characterization of thin films on Au(111) using reduced graphene oxide.

Main Results:

  • A regioselective synthesis of a water-soluble phosphorus corrole complex was achieved in high yield.
  • The phosphorus coordination controlled the substitution pattern, preventing polysubstitution.
  • The complex exhibited excellent emission quantum yield, even in water.
  • Hexacoordinated geometry with labile axial ligands was confirmed by 31P NMR.
  • Reduced graphene oxide facilitated controlled aggregation and surface transformation of the corrole on Au(111).

Conclusions:

  • The developed sulfonation strategy provides regioselective access to functionalized phosphorus corroles.
  • Phosphorus coordination is key to controlling the reactivity and substitution pattern of corroles.
  • The water-soluble phosphorus corrole exhibits promising optical properties for potential applications.
  • Controlled self-assembly on surfaces can be achieved using strategies like reduced graphene oxide interlayers.