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Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
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γ-Cyclodextrin Functionalized Supramolecular Architectured Molecular Logic Functions and Password Security System

Saikat Samanta1, Chinmoy Mahapatra2, Ujjal Kanti Roy1

  • 1Department of Chemistry, University of Kalyani, Nadia, West Bengal, India.

Luminescence : the Journal of Biological and Chemical Luminescence
|May 22, 2025
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Summary

This study introduces pH-triggered molecular logic using self-assembling 3,3'-bis-indolyl(phenyl)methane (BIPM) molecules and gamma-cyclodextrin (γ-CD). These supramolecular compounds exhibit reversible self-assembly/disassembly, enabling optical signal processing for molecular logic operations.

Keywords:
Boolean logicassociation–dissociationmolecular securitypH sensorγ‐CD supramolecule

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Area of Science:

  • Supramolecular Chemistry
  • Molecular Logic Systems
  • Optical Sensing

Background:

  • pH-responsive molecules are crucial for developing molecular logic systems.
  • Previous work showed 3,3'-bis-indolyl(phenyl)methane (BIPM) forms aggregates disaggregated by gamma-cyclodextrin (γ-CD).
  • Optical detection devices are vital analytical tools across scientific disciplines.

Purpose of the Study:

  • To explore pH-triggered molecular logic using nonlinear optical processes.
  • To investigate the photo-induced dynamics of γ-CD functionalized BIPM supramolecular compounds.
  • To demonstrate the potential for installing and processing logic operations via pH-induced self-assembly/disassembly.

Main Methods:

  • Utilizing nonlinear optical processes for input/output channels.
  • Employing pH variation to trigger photo-induced dynamics (self-assembly/disassembly/reassembly).
  • Confirming phenomena using fluorescence anisotropy and scanning electron microscopy (SEM).

Main Results:

  • Demonstrated pH-triggered self-assembly and disassembly of γ-CD functionalized BIPM supramolecular compounds.
  • Confirmed reversible photo-induced dynamics through experimental analysis.
  • Visualized potential for optical signal processing based on molecular state changes.

Conclusions:

  • pH-triggered dynamics in functionalized supramolecular compounds offer a novel platform for molecular logic.
  • This approach utilizes distinct input/output channels via nonlinear optical processes.
  • The study highlights exciting potential and challenges in developing advanced molecular logic systems.