Two-photon polarization dependent spectroscopy in chirality: a novel experimental-theoretical approach to study...

Area of Science:

• Chirality and Spectroscopy
• Physical Chemistry
• Materials Science

Background:

• Chirality is fundamental to life and biochemical processes.
• Traditional chiroptical methods (CD, ORD) have limitations in UV regions for biological systems.
• A novel non-linear, low-scatter, long-wavelength CD approach, TPACD, has been developed.

Purpose of the Study:

• To present the optics principles behind the experimental measurement of TPACD using the double L-scan technique.
• To examine and validate the theoretical-computational approach for TPACD using TD-DFT.
• To illustrate the potential of TPACD with experimental and theoretical results for chiral molecules.

Main Methods:

• Experimental measurement of TPACD using the double L-scan technique with pulsed lasers.
• Theoretical-computational analysis employing analytical response theory within TD-DFT.
• Spectroscopic studies on C(2)-symmetric, axially chiral molecules like R-BINOL, R-VANOL, and R-VAPOL.

Main Results:

• Detailed analysis of the optics principles for TPACD measurement.
• Validation of the theoretical-computational approach for TPACD.
• Presentation of experimental and theoretical TPACD data for R-BINOL, R-VANOL, and R-VAPOL.

Conclusions:

• TPACD is a promising spectroscopic tool for studying chiral systems, overcoming limitations of linear methods.
• The developed theoretical-computational approach provides reliable predictions for TPACD.
• Chiral bi-naphthol derivatives serve as effective models for TPACD structure-property relationship studies.