Materials Literature
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The methods of synthesis of dendrimers and dendritic macromolecules possessing phosphorus derivatives at each branching points are reviewed. Classical methods using the repetition of two steps are first described, then various ways usable to shorten the time needed for the synthesis are emphasized. These improvements…
The fine structure of excited excitonic states in a quantum dot with an embedded magnetic ion is studied theoretically and experimentally. The developed theory takes into account the Coulomb interaction between charged carriers, the anisotropic long-range electron-hole exchange interaction in the zero-dimensional exci…
Cyclopentadienyl ruthenium phosphane and carbene complexes are grafted on the surface of mesoporous SBA-15 molecular sieves through an aminosilane linker. The nature of the support after the grafting is examined by powder XRD, TEM and N(2) adsorption/desorption analysis. Elemental analysis, FT-IR, DRIFTS, TG-MS and MA…
Phase transitions in colloid-polymer mixtures have attracted a large amount of attention over the last 20 years (W. C. K. Poon, , 2002, , R859; R. Tuinier, J. Rieger and C. G. de Kruif, , 2003, , 1). By comparison, the interfacial tension between the coexisting phases has received little attention. Here, we show that…
Boehmite nanoparticles with covalently linked polyamine chains functionalized with naphthalene fluorophores have been prepared and characterized. The characterization of the materials by elemental microanalysis, X-ray powder diffraction, MAS 29Si NMR and electron microscopy unambiguously prove that the covalent anchor…
The triple decker dinuclear Cr(II) salt [(η5-C5Me5)Cr(μ2:η5-P5)Cr(η5-C5Me5)]+ (SbF6)− has been structurally characterised by multiple temperature X-ray diffraction experiments from 290 K to 12 K. This material shows changes in its structural features which correlate with its magnetic response, including a structural t…
Colloids with graduated fluorescence intensities were fabricated by means of layer-wise adsorption of fluorescein isothiocyanate-labelled poly(allyl amine hydrochloride) (FITC-PAH) together with poly(styrene sulfonate) (PSS) on silica particles. The graduated fluorescence was adjusted by variation of the fluorescent l…
The extension of Robson-type ligands from dinucleating based on 2,6-diformylphenol to trinucleating based on 2,7-diformyl-1,8-naphthalenediol is demonstrated by the synthesis, structural and magnetic characterization of the first trinuclear Cu(II) complex using a 1,8-naphthalenediol derived ligand.
This paper reports the use of first (G1), second (G2) and third (G3) generation dendritic branches based on L-lysine building blocks with an [18]crown-6 unit at the focal point to bind protonated dopamine. The binding strength in CD3OD is dependent on dendritic generation (G1 > G2 < G3). As expected, the presence of w…
Oriented Au–Cu nanoalloys have been generated in SiO2 films using a new two-layer (TL) coating approach. Two successive overlapping coating layers were deposited on silica glass substrate using Au- and Cu-incorporated inorganic–organic hybrid silica sols. The concentrations of the Au and Cu (3 equivalent mol% metal–97…
Neutral transition metal complexes of different alpha,omega-dimethyltripyrrins TrpyMX with M = Cu(II) and Zn(II) have been prepared with a variety of anionic halogeno and pseudohalogeno ligands X, and have been studied with respect to coordination modes and structural distortion. Only four- and five-coordinate species…
Abstract Characterization and performance of electrochemically treated cast PANI‐HgCl 2 films for detection of HCN in the range 1–20 ppm were studied. The HCN detection comprises analytical signals that are generated from the work function change and the resistance change of the sensing layer. The sensing platform acc…
Pseudomorphic transformation is introduced as an effective and versatile method to independently optimize the morphology of the grains and the structural properties of mesostructured silicas. In this account a short overview is given of the preparation of MCM-41 and MCM-48 mesophases as non-aggregated and homogeneousl…
A tetranuclear complex [Cr(III)Mn(II)(3)(PyA)(6)Cl(3)] 1 containing pyridine-2-aldoximato monoanion, PyA, has been structurally and magnetochemically characterized. The compound is a rare example of a tetranuclear star-shaped metal topology containing pyridine-2-aldoximato ligands. Static magnetic studies have demonst…
Cyclic octanuclear complexes, each containing seven group 13 metals and one d-block metal are reported and preliminary physical characterisation of the compounds discussed.
Abstract A method to microfabricate micron‐scale freestanding porous silicon photonic crystal particles is described. An electrochemically prepared film of porous silicon on a crystalline silicon substrate is patterned with an SU8‐25 photoresist, and the unmasked porous silicon is removed with a chlorine plasma reacti…
Y 2 SiO 5:Eu 3+ and Gd 9.33 (SiO 4 ) 6 O 2:Eu 3+ red phosphor particles were prepared using an emulsion liquid membrane (ELM, water-in-oil-in-water (W/O/W) emulsion) system, which could be utilized as a microreactor for precipitation reaction of rare earth oxalate and hydrolysis−condensation reaction of Si alkoxide, t…
We report a general strategy for the spontaneous segregation of electron-rich and electron-poor pi-conjugated moieties using mutually phobic aliphatic fluorocarbon-hydrocarbon interactions.
Layer-by-layer self-assembly can be used to incorporate amphiphilic molecules into multilayered polyelectrolyte architectures. This review examines equilibrium LbL assemblies constructed by direct adsorption from aqueous solution. LbL systems have not only provided fundamental insight into the nature of polyion-surfac…
New organic–inorganic hybrid molecular films, consisting of a Keggin-type polyoxometalate PW12 and a series of gemini amphiphiles with various lengths of the flexible spacers, have been fabricated using the Langmuir–Blodgett (LB) technique and the electrochemical properties of the hybrid films were investigated. When…