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Related Concept Videos

Ion Channels01:19

Ion Channels

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The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
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Bonding in Metals02:32

Bonding in Metals

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Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Formation of Complex Ions03:45

Formation of Complex Ions

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A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Precipitation of Ions03:11

Precipitation of Ions

30.0K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
30.0K
Alkali Metals03:06

Alkali Metals

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Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
24.2K

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Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
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A Photochromic Sensor Microchip for High-Performance Multiplex Metal Ion Detection.

Meng Qin1, Fengyu Li1, Yanlin Song2

  • 1Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing Engineering Research Center of Nanomaterials for Green Printing Technology, Beijing National Laboratory for Molecular Sciences (BNLMS), Beijing, P. R. China.

Methods in Molecular Biology (Clifton, N.J.)
|July 17, 2019
PubMed
Summary

This study introduces a novel sensor microchip utilizing a single photochromic molecule, spirooxazine, to detect multiple metal ions. This innovative approach successfully identified 11 metal ions and distinguished brands of mineral water and human serum samples.

Keywords:
FluorescenceMetal ionsMultistatesMultivariate analysisPhotochromic sensorSpirooxazine

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Chemical Sensing

Background:

  • Photochromic molecules exhibit reversible structural changes upon stimulation, enabling multiple recognition states.
  • Developing sensors for multiplex metal ion detection remains a significant challenge in analytical chemistry.

Purpose of the Study:

  • To design a facile sensor microchip for discriminating multiplex metal ions using a single photochromic molecule.
  • To demonstrate the sensor's capability in analyzing real-world samples like mineral water and human serum.

Main Methods:

  • Fabrication of a sensor microchip incorporating a single photochromic molecule, spirooxazine.
  • Utilizing different stimulation conditions (dark, UV, visible light) to induce distinct molecular states.
  • Analyzing patterned fluorescent signals generated from spirooxazine-metal ion coordination for detection.

Main Results:

  • The sensor microchip successfully discriminated 11 different metal ions.
  • The sensor demonstrated efficacy in distinguishing between 16 different brands of mineral water.
  • Metal ion analysis in human serum samples was successfully achieved using the developed sensor.

Conclusions:

  • A single photochromic molecule-based sensor microchip offers a versatile platform for multiplex metal ion detection.
  • The developed sensor provides a facile and effective method for analyzing metal ions in complex matrices.
  • This technology holds promise for various applications, including environmental monitoring and clinical diagnostics.