Polynuclear metal complexes of nanometre size. A versatile synthetic strategy leading to luminescent and redox-active dendrimers made of an osmium(II)-based core and ruthenium(II)-based units in the branches

Serroni, Scolastica; Juris, Alberto; Venturi, Margherita; Campagna, Sebastiano; Resino, Immaculada; Denti, Gianfranco; Credi, Alberto; Balzani, Vincenzo

doi:10.1039/a700426e

Cited by 105 publications

(74 citation statements)

References 32 publications

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“…Molecule 28b is an example. [121] The osmium and ruthenium redox couples were distinguishable from each other by cyclic voltammetry. The increase in positive charge as larger and larger analogues were compared did not appreciably change the redox potentials of these moieties.…”

Section: +mentioning

confidence: 99%

Metallodendrimers: Structural Diversity and Functional Behavior

Gorman¹

1998

Adv. Mater.

221

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Section: +mentioning

confidence: 99%

Metallodendrimers: Structural Diversity and Functional Behavior

Gorman¹

1998

Adv. Mater.

221

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“…Their perfect and well-defined structure leads to a number of interesting characteristics and features, including low viscosity, good solubility, and compatibility. 1,2 Numerous dendritic architectures have been reported including polyamines, 3 polyphenylethers, 4 triazine-containing dendrimers, 5,6 polyamidoamines, 7 carbosilanes, 8 and polynuclear metal complex, 9 to name just a few. Triazines-especially melamine-can recognize other molecules by the donation and acceptance of hydrogen bond, metal chelating, p-p interaction, and the ability of dendrimers to perform as catalysts, filters, or sorbents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of triazine‐based dendrimers and their application in metal ion adsorption

Golikand¹,

Didehban²,

Irannejad³

2011

J of Applied Polymer Sci

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This article described the synthesis of triazine-based dendrimers with poly(ethylene glycol) core by convergent method. Compound 1 was prepared by coupling of amino group of diethanolamine with cyanuric chloride in dry THF (tetrahydrofuran). Reaction of compound 1 with p-aminobenzylamine resulted in compound 2. Compound 4 was synthesized using coupling reaction of amino group of compound 2 with cyanuric chloride, then coupling of amine groups of p-aminobenzylamine with compound 3 in the hybrid solvents. The final dendrimer (den-OH) were synthesized using reaction of dendron 4 with compound 5. Ethylene diaminetetraacetic acid modified final dendrimer were successfully prepared via coupling ethylene diaminetetraacetic acid dianhydride and den-OH. The growth of dendrons and their structures were investigated by using usual spectroscopy methods and elemental analysis. The chelating behavior and sorption capacities of triazine dendrimers were determined in relation to pH dependency for some metal ions such as Cu þ2 , Ni þ2 , and Zn þ2 using atomic absorption methods.

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“…In this regard several synthetic methods are reported in the literature, some of which depend on supramolecular principles, and some others on more conventional synthetic principles (Figure 1). [15][16][17][18] We have been interested in organooxotin cages for some time and have recently developed new paradigms that utilize known robust synthetic methodologies to assemble a well-defined organooxotin cluster/cage with simultaneous arrangement of a functional periphery around the inorganic cluster/cage. [19] It was of interest whether such a stannoxanebased synthetic methodology can be applied to prepare multifluorene compounds.…”

Section: Introductionmentioning

confidence: 99%

Inorganic‐Cored Photoactive Assemblies: Synthesis, Structure, and Photochemical Investigations on Stannoxane‐Supported Multifluorene Compounds

Chandrasekhar¹,

Thilagar²,

Steiner³

et al. 2006

Chemistry A European J

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Organostannoxanes were used as inert supports for the preparation of multichromophore assemblies. The synthesis involves a single-step procedure and allows the preparation of compounds in which the number of chromophore units can be varied from one to six. Thus, the reactions of LCOOH (1-fluorenecarboxylic acid) or L'COOH (9-fluorenecarboxylic acid) with various organostannoxane precursors afforded the fluorenyl derivatives [Ph(3)SnO(2)CL] (1), [Ph(3)SnO(2)CL'] (2), [{nBu(3)SnO(2)CL''}(n)] (3), [{nBu(3)SnO(2)CL'}(n)] (4), [{tBu(2)Sn(OH)O(2)CL}(2)] (5), [{tBu(2)Sn(OH)O(2)CL'}(2)] (6), [{[nBu(2)SnO(2)CL](2)O}(2)] (7) [{[nBu(2)SnO(2)CL'](2)O}(2)] (8), [{nBuSn(O)O(2)CL}(6)] (9), and [{nBuSn(O)O(2)CL'}(6)] (10). Interestingly, the formation of 3 is accompanied by an unusual oxo-transfer reaction. The ligand L is oxidized at the 9-position. Compounds 1, 3, 5, 7, and 8 were characterized by X-ray crystallography. The solid-state structures of these compounds reveal rich supramolecular structures owing to multiple intermolecular interactions between the various supramolecular synthons present in these molecules. The optical behavior of 1-10 is primarily dictated by the fluorenyl periphery. These compounds display strong blue fluorescent emission in solution and blue-green fluorescent emission in the solid state. Fluorescence lifetimes of all of these compounds are on the nanosecond timescale, and this suggests that the emission originates from the singlet excited state to the ground state. Intermolecular interactions in the solid state lead to considerable broadening of the emission bands.

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Polynuclear metal complexes of nanometre size. A versatile synthetic strategy leading to luminescent and redox-active dendrimers made of an osmium(II)-based core and ruthenium(II)-based units in the branches

Cited by 105 publications

References 32 publications

Metallodendrimers: Structural Diversity and Functional Behavior

Metallodendrimers: Structural Diversity and Functional Behavior

Synthesis and characterization of triazine‐based dendrimers and their application in metal ion adsorption

Inorganic‐Cored Photoactive Assemblies: Synthesis, Structure, and Photochemical Investigations on Stannoxane‐Supported Multifluorene Compounds

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