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Supramolecular gelling agents: can they be designed?

Parthasarathi Dastidar¹

¹Department of Organic Chemistry, Indian Association for the Cultivation of Science, 2A&2B, Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, West Bengal, India. parthod123@rediffmail.com

Chemical Society Reviews

|November 21, 2008

Summary

Designing low molecular mass organic gelators (LMOGs) remains challenging. This review highlights molecular and crystal engineering approaches for the rational design of novel supramolecular gelators.

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Area of Science:

Supramolecular Chemistry
Materials Science
Organic Chemistry

Background:

Research in supramolecular gelators, particularly low molecular mass organic gelators (LMOGs), has significantly increased due to academic interest and potential materials science applications.
The rational design and synthesis of LMOGs present a major challenge, often hindered by the serendipitous discovery of gelators and a lack of molecular-level understanding of gelation mechanisms.
Existing approaches like molecular engineering are limited to modifying parent gelator scaffolds, restricting the development of diverse gelling agents.

Purpose of the Study:

To review recent developments in the rational design of LMOGs.
To highlight the utility of molecular and crystal engineering strategies in designing supramolecular gelators.
To provide insights into structure-property correlations for effective gelator design.

Main Methods:

Review of literature focusing on molecular engineering and crystal engineering approaches for LMOG design.
Correlation of single-crystal structure data with gelling/non-gelling behavior.
Analysis of self-assembly mechanisms at the molecular level.

Main Results:

Crystal engineering offers a pathway to understand gelator self-assembly by correlating molecular structure with gelling properties.
This structure-property correlation provides crucial insights for the rational design of new supramolecular gelling agents.
Advancements in both molecular and crystal engineering are contributing to the development of novel LMOGs.

Conclusions:

Crystal engineering provides a powerful tool for elucidating the molecular mechanisms underlying supramolecular gelation.
Rational design strategies, informed by crystal engineering, are essential for overcoming the challenges in synthesizing effective LMOGs.
This review underscores the importance of integrating molecular and crystal engineering for the future development of advanced supramolecular materials.