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A Facile Palladium-Mediated Contractions of Benzene to Cyclopentadiene: Transformations of Palladium(II) p-Benziporphyrin Bartosz Szyszko, Lechosław Latos-Grażyński and Ludmiła Szterenberg Department od Chemistry University of Wrocław 14 F. Joliot-Curie St., 50-383 Wrocław, Poland Palladium(II) p-benziporphyrin provides the unique macrocyclic vessel to afford the contraction of benzene to cyclopentadiene embedded in the first instance of 21carbaporphyrin complexes. Addition of palladium(II) and a hydroxide ion to a C–C double bond, β elimination, and competing cheletropic extrusion of carbon oxide and 1,2-hydride shift reactions lead to the contraction of p-phenylene to form a cyclopentadiene unit. This reaction results in the formation of a 21-carbaporphyrin from a palladium(II) p-benziporphyrin. In the case of chloropalladium 1,4-naphthiporphyrin similar reactivity pattern allowed to obtain 21-benzocarbaporphyrin on the course of naphthalene to isoindene contraction.
Chromogenic Anion Receptors Based on s-Triazine Skeleton. Synthesis and Properties. Ewa Wagner-Wysiecka, Karolina Mazur, Kamila Muchowska Gdansk University of Technology, Faculty of Chemistry, Department of Chemical Technology, Narutowicza 11/12, 80-233 Gdansk, Poland However the design of the new anion receptors is not always easy [1], it is a growing field of research due to the key roles played by anions in biology, environment and chemistry [e.g. 2, 3]. Rapid information about anion-receptor interaction may be achieved by incorporating a chromophore residue(s) into the ligand structure. Thanks it, anion recognition is well seen with a “naked eye” and quantitative studies of complexation process are possible with the use of simple and no expensive analytical method - UV-Vis spectroscopy. Promising building block for anion sensors is 1,3,5triazine ring [4]. It can be involved in all categories of supramolecular interactions e.g. coordination bonds, hydrogen bonding, electrostatic, charge transfer and aromaticstacking interactions. Even compounds of very sophisticated structure may be easily obtained using cyanuric chloride as a substrate. Here, the synthesis of chromogenic derivatives based on 1,3,5-triazine ring is presented. Obtained compounds differ in type, size and number of substituents joined with heterocyclic residue. The distinctive feature of the introduced substituents is the presence of additional functional groups which can act as proton donors in anion recognition via hydrogen bond formation. Anion complexation studies were carried out with the use of UV-Vis and NMR spectroscopy in organic solvents and their mixtures with water. The effect of the counter ion was also taken under investigation. Acknowledgments: Author kindly acknowledged support from sources for science in years 2010-2011, Grant No. N N204 137438. [1]. F. P. Schmidtchen, Coord. Chem. Rev. 250 (2006) 2918. [2]. T. Gunnlaugsson, M. Glynn, G. M. Tocci, P.E. Kruger, F. M. Pfeffer, Coord. Chem. Rev. 250 (2006) 3094. [3]. C. Caltagirone, P. A. Gale, Chem. Soc. Rev. 38 (2009) 520. [4]. T. J. Mooibroek, P. Gamez, Inorg. Chim. Acta 360 (2007) 381.
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4 th International Summer School Se
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4 th International Summer School
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Tuesday, September 13 th 9 - 10.30
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4.30 - 5.30 pm Poster Short Talks (
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2.30 - 4 pm Session VIII (Inorganic
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11.30 - 12.00 am Olga Federova, Mos
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INNOVATIVE DEVELOPMENTS ON THE BASI
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Calixarenes: from molecular recepto
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Controlled and Targeted Drug Delive
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What does the recognition of biomol
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Binding properties of calix[4]arene
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“Light and Molecular Design in Bi
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Supramolecular protein immobilizati
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Cucurbiturils at the interface betw
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Chiral Concave N-Heterocyclic Carbe
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Aromaticity Switching In Porphyrino
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Zwitterion-chromophore modules for
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Chemoinformatics approaches to virt
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Polyphosphorus Ligands in Supramole
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Page 41 and 42: Luisa De Cola Germany, Münster "Se
Page 43 and 44: Cationic amphiphilic calixarenes: s
Page 45 and 46: Supramolecular devices based on pho
Page 47 and 48: The sensing of interfacial interact
Page 49 and 50: Molecular recognition of organic qu
Page 51 and 52: Towards a molecular assembly based
Page 53 and 54: Analysis of benzodiaza-15-crown-5 e
Page 55 and 56: Crown-containing derivatives of nap
Page 57 and 58: Tuning of Knoevenagel-type substrat
Page 59 and 60: FRET based distance measurements on
Page 61 and 62: Synthesis and supramolecular associ
Page 63 and 64: The features of the coordination ne
Page 65 and 66: Catalysts within Dynamic Combinator
Page 67 and 68: SYNTHESIS AND COMPLEXATION ABILITIE
Page 69 and 70: Towards a Light Driven Proton Pump
Page 71 and 72: HPLC study of the complexation of c
Page 73 and 74: Novel fluorescent sensors based on
Page 75 and 76: SYNTHETIC TETRAAMIDES ANION RECEPTO
Page 77 and 78: Development of Vesicle-based Chemos
Page 79 and 80: Catechol derivatives of thiacalix[4
Page 81 and 82: Victor Pavlovsky Ukraine, Odessa "S
Page 83 and 84: Synthesis of disubstituted by merca
Page 85 and 86: SUPRAMOLECULAR POLYMERS OF OLIGO-DY
Page 87 and 88: Investigation of self-assembling ab
Page 89: Conjugates of thiacalixarenes and c
Page 93 and 94: Family Name First Name Title Positi
Page 95: Universität Regensburg - direction
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