Design and Applications of Highly Luminescent Transition Metal Complexes
'Design and Applications of Highly Luminescent Transition Metal Complexes' published in 'Topics in Fluorescence Spectroscopy'
Materials Literature
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Characterization and Thermophysical Properties of Unsaturated Polyester-Layered Silicate Nanocomposites
The thermophysical properties of unsaturated polyester (UPE) nanocomposites reinforced by organo-montmorillonite clay nanoplatelets are reported. The organo-clay nanoplatelets were sonicated in acetone for 2 hours to be dispersed in the UPE matrix. Vacuum extraction removed not only the acetone but also the styrene pr…
Poly(butylene terephthalate) Copolyesters Derived from l-Arabinitol and Xylitol
The synthesis, characterization, and some properties of new copolyesters of poly(butylene terephthalate) based on l -arabinitol and xylitol are described. These copolyesters were obtained by polycondensation reaction in the melt of mixtures of 1,4-butanediol and 2,3,4-tri- O -methyl- l -arabinitol or 2,3,4-tri- O -met…
Investigation of Reaction Conditions for Optimal Germanium Nanoparticle Production by a Simple Reduction Route
Various reaction conditions, such as reductant, time, procedure, concentration, and temperature, were investigated with the aim of finding a simple, optimized synthetic route for the synthesis of crystalline germanium nanoparticles. Results from these studies indicate that sodium naphthalide is an ideal reductant and…
Effect of Bending Rigidity and Interfacial Permeability on the Dynamical Behavior of Water-in-Water Emulsions
Phase separation in aqueous biopolymer mixtures results in the formation of an interface, separating two aqueous bulk phases. The properties of that interface are key parameters to understand and predict phenomena, such as the phase-separation process and deformation of droplets in a flow field. In these processes, th…
Synthesis and Properties of a Novel Phenylazomethine Dendrimer with a Tetraphenylmethane Core
[structure: see text] A new type of phenylazomethine dendrimer with a tetraphenylmethane core was synthesized by a convergent method. The properties of the dendrimer were confirmed by thermal, rheological, TEM, and AFM measurements. A stepwise radial complexation was clearly observed with SnCl(2).
Surface Modification Using Cubic Silsesquioxane Ligands. Facile Synthesis of Water-Soluble Metal Oxide Nanoparticles
The use of magnetic nanoparticles in biological applications is hampered by the lack of versatile methods to transfer them into aqueous solutions. Monolayer exchange using anionic octa(tetramethylammonium)−polyhedral oligomeric silsesquioxane provides individual particles that are soluble in aqueous environments and p…
A New Type of Luminescent Alkynyl Au4Cu2 Cluster
Changes in the optical properties of an alkynyldigold(I) complex upon reaction with Cu(I) are associated with a complicated structural change to form an unusual Au4Cu2 cluster with metallophilic interactions as well as pi-alkyne coordination.
Structures and relative stability of medium-sized silicon clusters. IV. Motif-based low-lying clusters Si21–Si30
Structures and relative stability of four families of low-lying silicon clusters in the size range of Sin(n=21-30) are studied, wherein two families of the clusters show prolate structures while the third one shows near-spherical structures. The prolate clusters in the first family can be assembled by connecting two s…
Reliable Low-Cost Theoretical Procedures for Studying Addition−Fragmentation in RAFT Polymerization
Enthalpies for the beta-scission reactions, R'SC(*)(Z)SR --> R'SC(Z)=S + (*)R (for R, R' = CH(3), CH(2)CH(3), CH(2)CN, C(CH(3))(2)CN, CH(2)COOCH(3), CH(CH(3))COOCH(3), CH(2)OCOCH(3), CH(2)Ph, C(CH(3))(2)Ph, and CH(CH(3))Ph and Z = CH(3), H, Cl, CN, CF(3), NH(2), Ph, CH(2)Ph, OCH(3), OCH(2)CH(3), OCH(CH(3))(2), OC(CH(3…
Novel Rubbers from Cationic Copolymerization of Soybean Oils and Dicyclopentadiene. 1. Synthesis and Characterization
Novel thermosetting copolymers, ranging from tough and ductile to very soft rubbers, have been prepared by the cationic copolymerization of regular (SOY) and 100% conjugated soybean oils (C(100)SOY) with dicyclopentadiene (DCP) catalyzed by Norway fish oil (NFO)-modified and SOY- and C(100)SOY-diluted boron trifluorid…
Ring-Opening Polymerization of ε-Caprolactone Initiated with Titanium n-Propoxide or Titanium Phenoxide
Ring-opening polymerization of ε-caprolactone initiated by titanium n -propoxide Ti(O- n -Pr) 4 was compared to the one initiated by titanium phenoxide or Ti(OPh) 4 . Polymerization was confirmed to proceed via a coordination−insertion mechanism for both initiators after end groups analysis by 1 H and 13 C NMR (nuclea…
Random Coils, β-Sheet Ribbons, and α-Helical Fibers: One Peptide Adopting Three Different Secondary Structures at Will
To potentially cure neurodegenerative diseases, we need to understand on a molecular level what triggers the complex folding mechanisms and shifts the equilibrium from functional to pathological isoforms of proteins. The development of small peptide models that can serve as tools for such studies is of paramount impor…
Electrospun Bioactive Nanocomposite Scaffolds of Polycaprolactone and Nanohydroxyapatite for Bone Tissue Engineering
Nanocomposite scaffolds based on nanofibrous poly(epsilon-caprolactone) (PCL) and nanohydroxyapatite (nanoHA) with different compositions (wt%) were prepared by electrostatic co-spinning to mimic the nano-features of the natural extracellular matrix (ECM). NanoHA was found to be well dispersed in polymers up to the ad…
Fiber Optic Fluorescence Thermometry
Foreword. Preface. Symbols and abbreviations. Fiber optic fluorescence thermometry: An introduction. Temperature dependences of Cr3+ fluorescence lifetimes. Phase-locked detection of fluorescence lifetime. Cr3+ fluorescence thermometers and applications of PLD. Alexandrite based fluorescence thermometry. Cr:LiSAF base…
Four-Dimensional Spectral Tomography of Carbonaceous Nanocomposites
There is considerable interest in the adhesion of polymers to carbon nanotubes for nanocomposite applications.(1-4) One example is multiwalled carbon nanotubes (MWCNTs) dispersed in nylon 6,6.(5) We will show that high-contrast tomographic reconstructions can be created from plasmon-loss electrons that show the three-…
Principles of Hierarchical Meso- and Macropore Architectures by Liquid Crystalline and Polymer Colloid Templating
The generation of porous silica with hierarchically organized bimodal mesoporosity of adjustable size and well-defined shape was investigated by using surfactant mixtures and the nanocasting procedure (liquid crystalline templating). A systematic study of combinations of various block copolymers (Pluronics F127, KLE (…
Structural Evolution in a Hydrothermal Reaction between Nb2O5and NaOH Solution: From Nb2O5Grains to Microporous Na2Nb2O6·2/3H2O Fibers and NaNbO3Cubes
Niobium pentoxide reacts actively with concentrate NaOH solution under hydrothermal conditions at as low as 120 degrees C. The reaction ruptures the corner-sharing of NbO(7) decahedra and NbO(6) octahedra in the reactant Nb(2)O(5), yielding various niobates, and the structure and composition of the niobates depend on…
Metal-Insulator Phenomena Relevant to Charge/Orbital Ordering in Perovskite Manganites
SummaryIn the manganese oxides with perovskite-type structure, various instabilities competing with the double exchange interaction play important roles, which depends on the effective one-electron band width and the nominal hole concentration. As one such example, the magnetic field induced metal-insulator phenomena…
Thermodynamics and phenomenology
The general way to derive constitutive equations for different phenomena, coupled or not, is briefly described with an emphasis on the choice of state variables and analytical expressions for the state potential and the (pseudo) potential of dissipation by qualitative experiments. Quantitative experiments are used to…