Avarietyof?uorescentandluminescentmaterialsintheformofmolecules,their complexes,andnanoparticlesareavailableforimplementationasreportingunits intosensingtechnologies. Increasingdemandsfromtheseapplicationareasrequire developmentofnew?uorescencereportersbasedonassociationandaggregationof ?uorescencedyesandontheirincorporationintodifferentnanostructures. Inter- tionsbetweenthesedyesandtheirincorporatingmatricesleadtonewspectroscopic effectsthatcanbeactivelyusedforoptimizingthesensordesign. Oneofthese effects is a spectacular formation of J-aggregates with distinct and very sharp excitationandemissionbands. Byincorporationintonanoparticles,organicdyes offer dramatically increased brightness together with improvement of chemical stabilityandphotostability. Moreover,certaindyescanformnanoparticlesth- selvessothattheirspectroscopicpropertiesareimproved. Semiconductorquantum dotsaretheothertypeofnanoparticles thatpossessuniqueandveryattractive photophysicalandspectroscopicproperties. Manyinterestingandnotfullyund- stoodphenomenaareobservedinclusterscomposedofonlyseveralatomsofnoble metals. Inconjugatedpolymers,strongelectronicconjugationbetweenelementary chromophoricunitsresultsindramaticeffectsinquenchingandinconformati- dependentspectroscopicbehavior. Possessingsuchpowerfulanddiversearsenaloftools,wehavetoexplorethem innovelsensingandimagingtechnologiesthatcombineincreasedbrightnessand sensitivityinanalytedetectionwithsimplicityandlowcostofproduction. The present book overviews the pathways for achieving this goal. In line with the discussion on monomeric ?uorescence reporters in the accompanying book (Vol. 8ofthisseries),aninsightfulanalysisofphotophysicalmechanismsbehind the ?uorescence response of composed and nanostructured materials is made. Based on the progress in understanding these mechanisms, their realization in differentchemicalstructuresisoverviewed. vii viii Preface Demonstratingtheprogressinaninterdisciplinary?eldofresearchanddev- opment,thisbookisprimarilyaddressedtospecialistswithdifferentbackground physicists, organic and analytical chemists, and photochemists to those who developandapplynew?uorescencereporters. Itwillalsobeusefultospecialists inbioanalysisandbiomedicaldiagnostics. Kyiv,Ukraine AlexanderP. Demchenko June2010 Contents PartI GeneralAspects NanocrystalsandNanoparticlesVersusMolecularFluorescent LabelsasReportersforBioanalysisandtheLifeSciences: ACriticalComparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 UteResch-Genger,MarkusGrabolle,RolandNitschke, andThomasNann OptimizationoftheCouplingofTargetRecognition andSignalGeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 AnaB. Descalzo,ShengchaoZhu,TobiasFischer,andKnutRurack CollectiveEffectsIn?uencingFluorescenceEmission . . . . . . . . . . . . . . . . . . . . . 107 AlexanderP. Demchenko PartII EncapsulatedDyesandSupramolecularConstructions FluorescentJ-AggregatesandTheirBiologicalApplications . . . . . . . . . . . . . 135 MykhayloYu. LosytskyyandValeriyM. Yashchuk Conjugates,Complexes,andInterlockedSystems BasedonSquarainesandCyanines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159 LeonidD. Patsenker,AnatoliyL. Tatarets,OleksiiP. Klochko, andEwaldA. Terpetschnig PartIII Dye-DopedNanoparticlesandDendrimers Dye-DopedPolymericParticlesforSensingandImaging . . . . . . . . . . . . . . . . 193 SergeyM. Borisov,TorstenMayr,Gu nterMistlberger,andIngoKlimant ix x Contents Silica-BasedNanoparticles:DesignandProperties . . . . . . . . . . . . . . . . . . . . . . . 229 SongLiang,CarrieL. John,ShupingXu,JiaoChen,YuhuiJin, QuanYuan,WeihongTan,andJuliaX. Zhao LuminescentDendrimersasLigandsandSensors ofMetalIons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253 GiacomoBergamini,EnricoMarchi,and

General Aspects

Nanocrystals and Nanoparticles Versus Molecular Fluorescent Labels as Reporters for Bioanalysis and the Life Sciences: A Critical Comparison
Optimization of the Coupling of Target Recognition and Signal Generation
Collective Effects Influencing Fluorescence Emission
Encapsulated Dyes and Supramolecular Constructions
Fluorescent J-Aggregates and Their Biological Applications
Conjugates, Complexes, and Interlocked Systems Based on Squaraines and Cyanines
Dye Doped Nanoparticles and Dendrimers
Dye-Doped Polymeric Particles for Sensing and Imaging
Silica-Based Nanoparticles: Design and Properties
Luminescent Dendrimers as Ligands and Sensors of Metal Ions
Prospects for Organic Dye Nanoparticles
Luminescent Metal Nanoclusters
Few-Atom Silver Clusters as Fluorescent Reporters
Luminescent Quantum Clusters of Gold as Bio-Labels
Conjugated Polymers
Structure, Emissive Properties, and Reporting Abilities of Conjugated Polymers
Optical Reporting by Conjugated Polymers via Conformational Changes
Fluorescence Reporting Based on FRET Between Conjugated Polyelectrolyte and Organic Dye for Biosensor Applications.