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Université de Neuchâtel

NMR spectroscopy and DFT calculations of a self-assembled arene ruthenium rectangle obtained from a combination of coordination and hydrogen bonds

Appavoo, Divambal ; Raja, Nandhagopal ; Deschenaux, Robert ; Therrien, Bruno ; Carnevale, Diego

In: Dalton Transactions, 2016, vol. 45, no. 4, p. 1410-1421

The hydrogen-bonded arene ruthenium metalla-rectangle, [(p-cymene) 2Ru2(OOnOO)(UPy)2]24+ , obtained from 1-(4-oxo-6-undecyl-1,4-dihydropyrimidin-2-yl)-3-(pyridin-4- ylmethyl)urea (UPy) and the dinuclear arene ruthenium clip (p-cymene) 2Ru2(OOnOO)Cl2 (OOnOO = 2,5-dioxido-1,4- benzoquinonato), is investigated by...

Université de Neuchâtel

Combining coordination and hydrogen-bonds to form arene ruthenium metalla-assemblies

Appavoo, Divembal ; Carnevale, Diego ; Deschenaux, Robert ; Therrien, Bruno

In: Journal of Organometallic Chemistry, 2016, vol. 824, p. 80-87

Three ureido-pyrimidone derivatives (N-LH) were used to generate in combination with four dinuclear arene ruthenium clips, (p-cymene) 2Ru2(OO boolean AND OO)Cl2 (OO boolean AND OO = oxalato, 2,5-dioxido-1,4-benzoquinonato, 2,5-dichloro-1,4-benzoquinonato, 5,8-dioxido-1,4-naphtoquinonato), twelve cationic arene ruthenium metalla-cycles of the...

Université de Neuchâtel

From anticancer complexes to photoswitchable assemblies : new approaches in the design and synthesis of arene ruthenium species

Cheminel, Thomas ; Therrien, Bruno (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

The aim of the present thesis was to explore new approaches in the design and synthesis of new arene ruthenium species. This class of organometallic compounds has been the subject of much attention in the recent years due to their interesting properties in various fields, such as medicinal chemistry or supramolecular chemistry. In order to achieve this goal, this work was divided into two...

Université de Fribourg

Mechanoresponsive Luminescent Molecular Assemblies : An Emerging Class of Materials

Sagara, Yoshimitsu ; Yamane, Shogo ; Mitani, Masato ; Weder, Christoph ; Kato, Takashi

In: Advanced Materials, 2015, vol. 28, no. 6, p. 1073-1095

The possibility to change the molecular assembled structures of organic and organometallic materials through mechanical stimulation is emerging as a general and powerful concept for the design of functional materials. In particular, the photophysical properties such as photoluminescence color, quantum yield, and emission lifetime of organic and organometallic fluorophores can significantly...

Université de Fribourg

A Thermo‐ and mechanoresponsive cyano‐substituted oligo(p‐phenylene vinylene) derivative with five emissive states

Sagara, Yoshimitsu ; Lavrenova, Anna ; Crochet, Aurélien ; Simon, Yoan C. ; Fromm, Katharina M. ; Weder, Christoph

In: Chemistry - A European Journal, 2016, vol. 22, no. 13, p. 4374–4378

Multiresponsive materials that display predefined photoluminescence color changes upon exposure to different stimuli are attractive candidates for advanced sensing schemes. Herein, we report a cyano-substituted oligo(p-phenylene vinylene) (cyano-OPV) derivative that forms five different solvent-free solid-state molecular assemblies, luminescence properties of which change upon thermal and...

Université de Fribourg

Supramolecular organization of dye molecules in zeolite L channels: synthesis, properties, and composite materials

Cao, Pengpeng ; Khorev, Oleg ; Devaux, André ; Sägesser, Lucie ; Kunzmann, Andreas ; Ecker, Achim ; Häner, Robert ; Brühwiler, Dominik ; Calzaferri, Gion ; Belser, Peter

In: Chemistry - A European Journal, 2016, vol. 22, no. 12, p. 4046–4060

Sequential insertion of different dyes into the 1D channels of zeolite L (ZL) leads to supramolecular sandwich structures and allows the formation of sophisticated antenna composites for light harvesting, transport, and trapping. The synthesis and properties of dye molecules, host materials, composites, and composites embedded in polymer matrices, including two- and three-color antenna systems,...

Université de Neuchâtel

Insight into the rules dictating the formation of arene ruthenium metalla-assemblies

Garci, Amine ; Therrien, Bruno (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2015.

The self-assembly process is a natural phenomenon with the ability to organize biological systems. Its development by chemists as a synthetic process allowed the formation of esthetical structures as well as highly complex supramolecular systems with remarkable biological functions. Since 1990, metal directed self-assembly strategy has largely contributed to the design and synthesis of discrete...

Université de Neuchâtel

Complexes arène-ruthénium multinucléaires fluctuants : véhicules pour le transport intracellulaire de molécules cytotoxiques et photosensibilisantes

Freudenreich, Julien ; Süss-Fink, Georg (Dir.) ; Therrien, Bruno (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2012.

Depuis plusieurs années, la thérapie photo-dynamique est pratiquée au quotidien pour soigner certaines tumeurs, comme le mélanome. La méthode consiste à traiter le patient au moyen d’un composé photosensible, indifféremment absorbé par les cellules normales et cancéreuses, ces dernières le retenant toutefois plus longtemps. Après plusieurs heures, le composé est activé par une...

Université de Neuchâtel

Propriétés mésomorphes ou biologiques d'assemblages dendritiques et métallodendritiques

Pitto-Barry, Anaïs ; Deschenaux, Robert (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2012 ; 2256.

The aim of this thesis is to combine metals and dendrimers to obtain mesomorphic or biological properties. The design of metamaterials from gold nanoparticles is still a challenge as the spatial organisation is difficult to control. Thus, the combination of gold nanoparticles with liquid-crystalline dendrimers is a way to explore the organisation of such systems in mesophases. We...