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Related Concept Videos

IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

1.8K
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
1.8K
Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

1.4K
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
1.4K
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

965
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
965
Applications of IR Spectroscopy: Overview01:11

Applications of IR Spectroscopy: Overview

442
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
442
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

1.3K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
1.3K
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

1.1K
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to...
1.1K

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Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
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Unlocking the Potential of Machine Learning in Enhancing Quantum Chemical Calculations for Infrared Spectral

Adithya Ranjith Kartha1, Dhanush P Ajayakumar1, Muhammad Idris1

  • 1School of Computer Science and Engineering (SCOPE), Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India.

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Summary

Machine learning (ML) models predict infrared (IR) spectra, reducing computational costs for molecular analysis. This approach accelerates molecular identification and classification, enhancing applications in chemistry and data science.

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Area of Science:

  • Chemistry
  • Data Science
  • Computational Chemistry

Background:

  • Infrared (IR) spectroscopy analyzes molecular structures via vibrational modes.
  • Traditional quantum mechanical methods are accurate but computationally expensive for large systems.

Purpose of the Study:

  • Integrate machine learning (ML) to predict IR spectra, reducing computational costs.
  • Utilize IR spectra for molecular identification and classification into families.

Main Methods:

  • Developed and trained ML models using TensorFlow on computational chemistry data.
  • Data included molecular geometry, vibrational modes, and quantum mechanical properties from Gaussian 16.
  • Focused on predicting vibrational frequencies and intensities while maintaining interpretability.

Main Results:

  • Achieved significant reduction in computational costs for IR spectral prediction.
  • Demonstrated ML models' ability to maintain high accuracy.
  • Established a link between chemical principles and ML predictions.

Conclusions:

  • ML integration offers a scalable and accelerated solution for complex molecular system analysis.
  • Potential applications in drug discovery, materials science, and chemical engineering.
  • Highlights advancements, challenges, and future potential at the intersection of chemistry and data science.