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Dissertation
Spectroscopic investigations of hydrogen bond network structures in water clusters
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ISSN: 21905053 ISBN: 4431546839 4431543112 4431543120 Year: 2013 Publisher: Tokyo ; New York : Springer,

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Abstract

The properties and nature of water clusters studied with novel spectroscopic approaches are presented in this thesis. Following a general introduction on the chemistry of water and water clusters, detailed descriptions of the experiments and analyses are given. All the experimental results, including first size-selective spectra of large clusters consisting of 200 water molecules, are presented with corresponding analyses. Hitherto unidentified hydrogen bond network structures, dynamics, and reactivity of various water clusters have been characterized at the molecular level. The main targets of this book are physical chemists and chemical physicists who are interested in water chemistry or cluster chemistry.


Book
Development of novel hydrogen-bond donor catalysts : doctoral thesis accepted by Kyoto University, Japan
Author:
ISBN: 4431547452 4431542302 4431542310 1299198023 Year: 2013 Publisher: New York : Springer,

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This work describes novel, effective hydrogen-bond (HB) donor catalysts based on a known bifunctional tertiary amine-thiourea, a privileged structure, which has been proven to be one of the most widely used organocatalysts. These HB donor catalysts derived from quinazoline and benzothiadiazine were initially synthesized as novel HB donors with their HB-donating abilities being measured by analytical methods. They were found to be effective for a variety of asymmetric transformations including Michael reactions of a, b-unsaturated imides and hydrazination reactions of 1,3-dicarbonyl compounds. Thiourea catalysts that have an additional functional group are also described. Specifically, thioureas that bear a hydroxyl group were synthesized and subsequently used as novel bifunctional organocatalysts for catalytic, asymmetric Petasis-type reactions involving organoboronic acids as nucleophiles. These addition reactions were difficult to achieve using existing organocatalysts. One of the developed catalytic methods can be applied to the synthesis of biologically interesting peptide-derived compounds possessing unnatural vinyl glycine moieties. These findings introduce new criteria required for the development of organocatalysts for asymmetric reactions, thus making a significant contribution to the field of organocatalysis.


Book
Spectroscopic investigations of hydrogen bond network structures in water clusters
Author:
ISBN: 8847026091 8847026105 Year: 2013 Publisher: Tokyo ; New York : Springer,

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Abstract

Nell'infanzia si pongono i classici interrogativi con tanti “perché?”. Purtroppo poi, nel corso dell'educazione matematica, la curiosità diminuisce e spesso ci si accontenta di chiedere "come si fa?". Questo libro è dedicato ai perché della logica e teoria degli insiemi, dell'analisi matematica, della probabilità e statistica. Si completano così gli argomenti di matematica insegnati a scuola, dopo i precedenti testi di V. Villani sui perché dell’algebra e geometria. Il titolo contiene un messaggio. In logica si affronta il calcolo delle proposizioni, l’analisi matematica è nota anche col nome di calcolo, la probabilità è detta calcolo delle probabilità. In tutti e tre i casi si potrebbe focalizzare l’attenzione sulla parola calcolo. Ma questo è riduttivo: il calcolo è una componente importante, ma altrettanto importante è la comprensione critica di tutto ciò che sta alla base dei calcoli. Il libro è rivolto a chi insegna matematica e a tutte le persone che hanno conservato una genuina curiosità scientifica. .

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