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Analytische chemie. --- Fluorimetrie.

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Analytische chemie. --- Chemische reacties.

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Halogen atoms in organiccompounds can typically be foundat the periphery of molecules. For this reason, they are ideally positioned to be involved in intermolecular interactions. Indeed, halogen atoms are frequently involved in awide varietyofnon-covalent interactions whichcanberemarkably different regarding their energetic and geometric features. Theoretical studies predict thattheelectrondensitydistributionaroundhalogenatomsformsanellipsoid elongated in the direction perpendicular to the covalent bond axis. A clear trend ofincreasing electropositive potential develops alongthe covalent bond axisuponincreasingthepolarizabilityandatomicmassofthehalogen.Exp- imentalresultscon?rmthisanisotropicdistributionandprovetheamphoteric characterofhalogens.Thiscanproduceinteractionsinadirectionperpend- ular to the covalent bond axis when the halogen is the electron donor (Lewis base), and along the axis when the halogen is the electron acceptor (Lewis acid). This book focuses on the interactions wherein halogens work as el- trophilicspecies and interact with electron rich sites (namely, electronegative partners).Ofthenumerousnon-covalentinteractionsinvolvinghalogens,this particular subset istypically referredto ashalogen bonding.The bookbegins byintroducingtheoreticalcalculationsonthecharacteristicsofhalogenbo- ing (A. Karpfen), then focuses on the adducts wherein the electron donor is a lone pair possessing species (n donor). The complexes formed by halogens andinterhalogensinthegas(A.Legon)andsolidphase(W. T.Penningtonetal.) arepresentedandtheroleofhalocarbonsinhalogenbonding-basedcrystal- gineeringisdiscussed(P.Metrangolo,G.Resnatietal.).Achapterexploringthe complexesinwhichhalogenatomsinteractwith? electrondonors(J.K.Kochi etal.)concludesthepartofthebookthatdealswiththegeneralitiesofhalogen bonding.Incontrast,thelasttwochaptersofthisbookdiscusshalogenbonded adducts endowed with useful applicative properties. Among the many novel applications of halogen bonding, liquid crystals(D. Bruce) and conducting or magnetic materials (M. Fourmigue)are discussed as prototypicalexamples.

anorganische chemie --- Analytical chemistry --- fysicochemie --- analytische chemie --- Physicochemistry --- Inorganic chemistry

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Solid Phase Microextraction: Theory and Practice Janusz Pawliszyn Solid phase microextraction (SPME) is a recently proposed solvent-free sampling and sample preparation technique. SPME represents a quick, sensitive, and economical approach that can be adopted for field work and can be easily integrated with present analytical instrumentation into an automation process. Written by the inventor of the technique, Solid Phase Microextraction: Theory and Practice describes the theoretical and practical aspects of this new technology, which received an "R&D 100" Award in 1994 recognizing its invention as a major advancement in the analytical sciences. Solid Phase Microextraction: Theory and Practice, the first book on SPME, offers the reader:* An overview of SPME technique, theory, method development, and applications;* Experiments for beginners;* A summary of the practical applications of SPME in environmental, food, pharmaceutical, and forensic settings;* Material suitable for SPME courses or self-guided study.

Chemistry, Analytic --- Extraction (Chemistry). --- Technique. --- Analytische chemie. --- Extractie.

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Analytical chemistry --- Chemistry, Analytic --- 543 --- chemische analyse --- analytische chemie --- Chemistry, Analytic. --- Analytische chemie --- Analytische chemie. --- 543 Analytical chemistry --- Complexometric titration --- Equilibrium --- Equilibrium, acid-base --- Potentiometry --- Precipitation --- Redox reaction --- Solvents --- Titration