**Author details**

Rashid Ali

Organic and Supramolecular Functional Materials Research Laboratory, Department of Chemistry, Okhla, New Delhi, India

\*Address all correspondence to: rali1@jmi.ac.in

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*Introductory Chapter: Historical Background – Fundamental Structural and Physiochemical… DOI: http://dx.doi.org/10.5772/intechopen.107434*
