Materials Literature
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An organic dual-wavelength distributed feedback (DFB) laser empowered by a dye-doped holographic polymer dispersed liquid crystal (HPDLC) grating is reported for the first time. The dual-wavelength laser operates at 586.6 nm and 670.2 nm simultaneously in one laser beam via the seventh and eighth Bragg orders of a one…
This paper presents studies for the application of new fluorescent benzo[k]fluoranthene-based linear acenes as dopants in deep blue organic light-emitting diodes (OLEDs). Benzo[k]fluoranthene derivatives are easily prepared, and the substituents of the derivatives can be easily replaced by different functional groups.…
Real-time radiography using synchrotron radiation X-ray was utilized to directly observe and investigate the formation behavior of Fe bearing intermetallic phases in Al–Si–Cu alloys. Solidification sequences of two Al–Si–Cu alloys with different Fe content were examined in a specially designed vacuum furnace and chamb…
We explore a kinetically controlled strategy to suppress the gelation in the homopolymerization of multi-vinyl monomers (MVMs) via RAFT polymerization. We report the generation of 3D single cyclized polymer structures from the RAFT process, which significantly contradicts the classic F-S theory. This approach enables…
In this communication, the morphology of well-defined P3DDT-b-PMMA with a 65.2% PMMA coil volume fraction is revealed as a hexagonally packed cylinder structure by X-ray scattering experiments after thermal annealing. Upon heating, an order-to-order transition (OOT) between cylindrical and gyroidal structures is obser…
The chemical modification of nanocrystalline diamond (NCD) atomic force microscope (AFM) tips was investigated and used for chemical force spectroscopy (CFS). In contrast to common chemical modification routes for gold or silicon AFM tips, this method creates stable C–C bonding to attach functional moieties to the NCD…
Poly(ethylene glycols) with different molecular weights were used to prepare NH4TiOF3 mesocrystals. The use of PEG-1000, -10 000, or -20 000 produced NH4TiOF3 mesocrystals whereas, PEG-4500 produced TiO2 (anatase) in nanoparticulate form. The shapes and the crystal structures of NH4TiOF3 mesocrystals formed with PEGs…
Nucleophilic substitution reactions of N(3)P(3)Cl(4)[O(CH(2))(2)NCH(3)], (1) with the sodium salts of mono- and di-functional alcohols [methanol (2), phenol (3), tetraethyleneglycol (4) and 1,3-propanediol (5)] were carried out in order to investigate a possible directing effect of the spiro O-moiety on the formation…
The mid-IR spectrum of the hydrogen bonding lactam 2-pyrrolidinone in CCl(4) was studied using FT-IR spectroscopy accompanied by a quantum chemical anharmonic normal mode analysis combined with a Monte Carlo approach based on semi-empirical harmonic frequencies. We characterized and assigned the spectroscopic features…
Yeast displaying glucose oxidase on their surface were encapsulated in a graphene oxide hydrogel. The ability of the modified yeast to reduce graphene oxide by glucose assimilation while maintaining viability was tested with time and deemed suitable for biofuel cell applications.
Direct electrochemical reduction of solid CaWO 4 to fine W powder in molten CaCl 2 -NaCl was studied by cyclic voltammetric measurement and potentiostatic/constant-voltage electrolysis. The effect of electrolysis conditions such as electrolysis time, temperature and voltage on the quality of the product (the residual…
Thermal engineering of Polymer Electrolyte Membrane (PEM) fuel cells is an operational requirement for optimum power generation. The first order analysis involves the monitoring of stack temperatures and acts as an input for process control. Excessive temperatures dehydrate the membrane and increase the internal losse…
Organic ionic plastic crystals (OIPCs) with cyclic perfluoroalkyl sulfonylamide as a counter anion were synthesized with an intention of expanding the temperature range of their plastic crystalline phase. The thermal analysis of the obtained OIPCs showed a solid–solid phase transition below room temperature and a high…
Mo
Living radical polymerization (LRP) of organic and water soluble acrylates and acrylamides was mediated by a versatile cobalt porphyrin complex (TMP-OH)Co. The capability of this cobalt complex to mediate LRP in both polar and non-polar media permits the direct synthesis of useful and previously difficult to prepare f…
A series of 1-alkyl-3-methylimidazolium hexafluorocomplex salts (C(x)MImAF(6), x = 14, 16 and 18, A = P, As, Sb, Nb and Ta) have been characterized by thermal analysis, X-ray diffraction and polarized optical microscopy. A liquid crystalline mesophase is observed for all the C(16)MIm and C(18)MIm salts. The C(14)MIm(+…
Reactions of series of macrocycle derivatives [Ni(hto)]Cl2·2H2O (1) (hto = 1,3,6,9,11,14-hexaazatri-cyclo[12.2.1.16,9]octadecane), [Ni(CHA)](ClO4)2 (2) (CHA = 1,3,6,8,11,14-hexaazatri-cyclo[12.2.1.18,11]octadecane), [Ni(PCHA)](ClO4)2 (3) and [Cu(PCHA)](ClO4)2 (4) (PCHA = 4-methyl-1,3,6,8,11,14-hexaazatri-cyclo[12.2.1.…
The design and synthesis of anthracene labeled bispyridinium amides 1–4 along with their anion binding, cell staining and DNA interaction studies are reported. All the chemosensors exhibit significant response towards H2PO4− in CH3CN. Furthermore, sensors 2 and 3 are quite interesting for the selective sensing of alip…
Reactions of hexamethylenetetramine (hmt) and AgSCN in different solvents generated three distinct [AgSCN]n-based coordination polymers (CPs): [Ag(1,3-μ2-SCN)(μ2-hmt)]n (1), {[Ag(1,1,3-μ3-SCN)]2(μ2-hmt)}n (2) and [Ag(1,1,3-μ3-SCN)(μ4-hmt)0.5]n (3). The identities of the coordination polymers (CPs) 1–3 have been unambi…
A new strategy for enhancing the brightness of the NIR distyryl Bodipy derivatives was proposed based on the indirect S0 → S2 excitation, and applied to fluorescence turn-on detection of Hg2+, by which the marked fluorescence enhancement (2.5-fold) and the high sensitivity for Hg2+ (up to 3 ppb) could be realized.