Research Article

Evaluation of the Molecular State of Piperine in Cyclodextrin Complexes by Near-Infrared Spectroscopy and Solid-State Fluorescence Measurements

Scheme 1

Structural view of different crystalline arrangements: (a) channel-type, (b) head-to-head, (c) head-to-tail, (d) tetragonal, (e) monoclinic, and (f) hexagonal; (g) cage-type.