Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Molecular orientation and angular distribution probed by angle-resolved absorbance and second harmonic generation

Simpson1, Westerbuhr, Rowlen

  • 1Department of Chemistry and Biochemistry, University of Colorado, Boulder 80309-0215, USA.

Analytical Chemistry
|March 30, 2000
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Indian Hemp as an Oxytoxic.

Western journal of medicine and surgery·2024
Same author

Method of Operating in Excision of the Cervix Uteri.

Western journal of medicine and surgery·2024
Same author

On Unavoidable Hemorrhage.

Medical examiner (Philadelphia, Pa.)·2023
Same author

Chloroform in Infantile Convulsions and Other Spasmodic Diseases.

Medical examiner (Philadelphia, Pa.)·2023
Same author

Cimicifuga Racemosa.

Chicago medical examiner·2023
Same author

On the Various Forms of Vulvitis.

The Chicago medical journal·2023

This study combined nonlinear and linear spectroscopy to analyze molecular orientation. The findings reveal distinct angular distributions for physisorbed and covalently bound dyes on surfaces.

Area of Science:

  • Molecular spectroscopy
  • Surface science
  • Nonlinear optics

Background:

  • Understanding molecular orientation on surfaces is crucial for designing advanced materials.
  • Traditional spectroscopic methods can be limited in their ability to fully characterize molecular arrangements.

Purpose of the Study:

  • To develop and apply a combined spectroscopic approach for precise molecular orientation analysis.
  • To differentiate between physisorbed and covalently bound molecular systems based on their orientation distributions.

Main Methods:

  • Utilized second harmonic generation (SHG), a nonlinear optical technique.
  • Employed angle-resolved absorbance with photoacoustic detection, a linear spectroscopic method.
  • Assumed a Gaussian distribution function to model the angular orientation.

Related Experiment Videos

Main Results:

  • Physisorbed stilbene dye on fused silica showed a narrow orientation distribution (rms width < 8 degrees) centered at 73 degrees.
  • Covalently bound azo dye exhibited a broad orientation distribution (rms width ~30 degrees) centered at 60 degrees.
  • The combined SHG and absorbance method provided superior insights compared to using two linear techniques.

Conclusions:

  • The synergistic combination of nonlinear (SHG) and linear (absorbance) spectroscopy offers a powerful tool for detailed molecular orientation studies.
  • The method effectively distinguishes between different surface binding mechanisms based on orientation characteristics.
  • This approach enhances the understanding of molecular assembly on surfaces, vital for materials science and nanotechnology.