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Related Concept Videos

Nucleic Acid Structure01:25

Nucleic Acid Structure

The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
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Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
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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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Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
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Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
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Published on: April 3, 2014

A self-complementary nucleoside: synthesis, solid-state structure, and fluorescence behavior.

Eun-Kyoung Bang1, Jiyeon Won, Dohyun Moon

  • 1Department of Chemistry, Division of IBB, Pohang University of Science and Technology, Pohang 790-784, Korea.

Chemistry, an Asian Journal
|June 3, 2011
PubMed
Summary
This summary is machine-generated.

A novel self-complementary nucleoside, (A)T, exhibits enhanced solid-state fluorescence. Aggregation, driven by hydrogen bonding and π-π stacking, leads to increased intensity and redshifted emission.

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Area of Science:

  • Organic Chemistry
  • Supramolecular Chemistry
  • Materials Science

Background:

  • Fluorescent organic molecules often exhibit quenched emission in the solid state.
  • Self-complementary nucleosides offer unique structural and photophysical properties.
  • Understanding aggregation-induced emission is crucial for developing advanced materials.

Purpose of the Study:

  • To synthesize and characterize a novel self-complementary nucleoside, (A)T.
  • To investigate the solid-state fluorescence properties of (A)T.
  • To elucidate the aggregation mechanisms responsible for enhanced fluorescence.

Main Methods:

  • Chemical synthesis of the self-complementary nucleoside (A)T.
  • Spectroscopic analysis (fluorescence spectroscopy).
  • X-ray crystallography for solid-state structure determination.
  • Density Functional Theory (DFT) calculations.

Main Results:

  • Successful synthesis of the self-complementary nucleoside (A)T with pale-blue fluorescence.
  • (A)T displays enhanced fluorescence in the solid state, contrary to typical organic molecules.
  • Increased concentration or decreased temperature leads to aggregation, resulting in enhanced fluorescence intensity and a ~70 nm redshift.
  • X-ray crystallography and DFT calculations confirm aggregate formation stabilized by hydrogen bonding and π-π stacking.

Conclusions:

  • The synthesized (A)T nucleoside exhibits unique solid-state fluorescence properties.
  • Aggregation-induced emission in (A)T is driven by specific intermolecular interactions.
  • This study provides insights into designing fluorescent materials with enhanced solid-state emission through controlled aggregation.