Preface. Modification of Cyclodextrins to Control their Guest-Host Chemistry and Their Application as Chemosensors; J.H.T. Luong. New Fluorescent Readouts for Protein Interactions, Gene Expression, and Membrane Potential; R.Y. Tsien. Chemical Sensors Based on Field Effect Transistors; Selective Recognition of Cations and Anions; M.M.G. Antonisse, et al. Aqueous Sugar Sensing by Boronic-Acid-Based Artificial Receptors; S. Shinkai. Solid State Supramolecular Optical Sensors; O.S. Wolfbeis, et al. Fluorescent Chemosensors Which Take Profit from the Metal-Ligand Interaction; L. Fabbrizzi, et al. Recognition, Transduction and Immobilisation: A Holistic Approach to Sensor Development; D. Diamond, et al. Signal Transduction in Chemosensors of Modified Cyclodextrins; A. Ueno, et al. Hydrogen Bonding Chemosensors for Metabolites and Nucleotides; T.W. Bell, Z. Hou. New Approaches to Sensory Materials: Molecular Recognition in Conjugated Polymers. New Transduction Methodology; T.M. Swager. Higher Generation Luminescent PET (Photoinduced Electron Transfer) Sensors; A.P. De Silva, et al. Chemosensing of Monocyclic and Bicyclic Aromatic Hydrocarbons by Supramolecular Active Sites; W.K. Hartmann, et al. Squaraine-Based Long Wavelength Fluorescent Chemosensors for Ions; E.U. Akkaya. A Fluorescent Chemosensor with Selectivity for Hg(II). Chelatoselectivity Via Ligand Immobilization; J. Yoon, et al. Cation-Responsive Fluorescent Sensors; B. Valeur, et al. Fluorescent, Siderophore-Based Hydroxamate Chelators for the Detection of Transition-Metal Ions; F. Fages. Author Index. Subject Index.