Showing papers on "Derivative (chemistry) published in 2014"
TL;DR: In this article, the authors described the direct conversion of chitin into a nitrogen-containing (N-containing) furan derivative (3A5AF) for the first time under optimized conditions, the yield of 3A5F reached 75% with ca 50% chitIN conversion by using boric acid and alkaline chlorides as additives, and NMP as a solvent.
201 citations
Journal Article•
TL;DR: Highly efficient exciplex systems incorporating a heptazine derivative as an electron acceptor and 1,3-di(9H-carbazol-9-yl)benzene as an electrons donor are developed.
Abstract: Highly efficient exciplex systems incorporating a heptazine derivative () as an electron acceptor and 1,3-di(9H-carbazol-9-yl)benzene () as an electron donor are developed. An organic light-emitting diode containing 8 wt% : as an emitting layer exhibits a maximum external quantum efficiency of 11.3%.
96 citations
TL;DR: In this paper, the existence of Cantor families of small amplitude, analytic, linearly stable quasi-periodic solutions of reversible derivative wave equations is proved and the Cantor families are shown to be stable.
Abstract: We prove the existence of Cantor families of small amplitude, analytic, linearly stable quasi-periodic solutions of reversible derivative wave equations.
86 citations
TL;DR: A spiro compound DPAA-AF combining an electronaccepting diazafluorene unit and an electrondonating bis(diphenylamino)acridane unit has been synthesized and used as an emitter in organic light-emi... as discussed by the authors.
Abstract: A spiro compound DPAA-AF combining an electron-accepting diazafluorene unit and an electron-donating bis(diphenylamino)acridane unit has been synthesized and used as an emitter in organic light-emi...
68 citations
TL;DR: In this paper, a naphthyl-substituted porphyrin derivative and cucurbit[8]uril in aqueous solution were obtained by host-guest interactions.
64 citations
TL;DR: A diazadiphosphapentalene derivative 5 featuring a bent geometry with two phosphorus atoms at the bridgehead has been synthesized and the reaction is viewed as a formal σ-bond metathesis between an N-H bond of ammonia and an endocyclic P-N bond of 5.
Abstract: A diazadiphosphapentalene derivative 5 featuring a bent geometry with two phosphorus atoms at the bridgehead has been synthesized. Under mild conditions, compound 5 readily activated ammonia to afford 1-aza-2,3-diphospholene derivative 6 bearing an enamine group. The reaction is therefore viewed as a formal σ-bond metathesis between an N–H bond of ammonia and an endocyclic P–N bond of 5. Details of the reaction mechanism for ammonia activation as well as subsequent isomerization were explored by density functional theory calculations.
63 citations
TL;DR: Fibrous nanoaggregates of a new benzoxazole-based derivative have been reported that exhibits not only H-aggregate but also strong yellow fluorescence, which is different from the traditional understanding of H- Aggregates.
62 citations
TL;DR: The supramolecular patterns of a thienophenanthrene derivative could be switched among dissimilar polymorphs with different halogen-bond densities by solution concentration through a combination of STM and density functional theory (DFT) calculations.
57 citations
TL;DR: In this article, a novel small molecule water-soluble poly-N-alkylpyridine substitued metallophthalocyanine derivative VOPc(OPyCH3I)8 was synthesized and applied in polymer solar cells (PSCs).
Abstract: A novel organic small molecule water-soluble poly-N-alkylpyridine substitued metallophthalocyanine derivative VOPc(OPyCH3I)8, namely 2,3,9,10,16,17,23,24-octakis-[N-methyl-(3-pyridyloxy)] vanadylphthalocyanine iodide (1 : 8), was synthesized and applied in polymer solar cells (PSCs). Notably, a power conversion efficiency (PCE) of 8.12% for the working area of 2 × 2 mm2 and a PCE of 7.23% for the working area of 4 × 4 mm2 have been achieved in the PSCs with this molecule as a cathode interlayer. They are comparable with the higher values of PCE of the PSCs reported currently, indicating that VOPc(OPyCH3I)8 is a new promising candidate as a good cathode interlayer for highly efficient PSCs.
52 citations
TL;DR: In this paper, the effects of the addition of KI on the corrosion inhibitive performance of a coumarin derivative on an aluminum alloy in 1.0 M H2SO4 at different temperatures were studied using various electrochemical measurements.
Abstract: Synergistic effects of the addition of KI on the corrosion inhibitive performance of a coumarin derivative on an aluminum alloy in 1.0 M H2SO4 at different temperatures were studied using various electrochemical measurements. Density functional theory was used to calculate the quantum chemical parameters of the coumarin derivative. The experimental results showed that the coumarin derivative is considered as a mixedtype inhibitor. The corrosion potential values were almost unchanged upon the addition of PBBC to the acidic solution. The inhibition efficiency increases with increasing inhibitor concentration and increases further in the presence of 6.02 mM KI but decreases significantly at higher temperature. The adsorption of PBBC obeyed the Langmuir isotherm, and being chemically adsorbed at lower temperatures, while physical adsorption is favoured at higher temperature. The theoretical results indicated that the coumarin derivative was adsorbed onto the surface of Al2024 through the sulfur, oxygen and nitrogen atoms.
50 citations
TL;DR: A linear coplanar carbazole-based benzoxazole derivative without any auxiliary moieties could gelatinize organic solvents, and exhibited emission enhancement owing to the J-aggregate formation.
TL;DR: Mn(I) carbonyl terpyridyl complexes have been synthesized and characterized and the tricarbonyl derivative exhibits interesting behaviors for controlled CO-release by both thermal and photosynthetic pathways.
TL;DR: A new [2]catenane is synthesized composed of a pillar[5]arene ring and a pyridinium derivative using ring-closing metathesis.
Patent•
09 Jul 2014
TL;DR: A McMurry coupling reaction was used for the efficient synthesis of a bis(m-phenylene)-32-crown-10 based cryptand Z-3 with high yield that formed host-guest complexes with paraquat derivative 4 and 2,7-diazapyrenium derivative 5.
TL;DR: A new hexakisfullerene derivative possessing two pairs of phenyl pyridine groups attached to two methano-carbon atoms located at the trans-1 positions was designed and synthesized, used to assemble the first fullerene-linked two-dimensional MOF by coordination with Cd(2+) .
Abstract: Given the unique structural and electronic properties of C60, metal–organic frameworks (MOFs) containing C60 linkers are expected to exhibit interesting characteristics. A new hexakisfullerene derivative possessing two pairs of phenyl pyridine groups attached to two methano-carbon atoms located at the trans-1 positions was designed and synthesized. The four pyridyl nitrogen atoms define a perfectly planar rectangle. This new C60 derivative was used to assemble the first fullerene-linked two-dimensional MOF by coordination with Cd2+.
TL;DR: This reaction is the first example of C-H fluorosilylation of 2-phenylpyridines with amino(1,3,2-dioxaborolan-2-yl)diphenylsilane, and the obtained fluorosallylated products are silafluorene equivalents.
Abstract: Treatment of 2-phenylpyridines with amino(1,3,2-dioxaborolan-2-yl)diphenylsilane produced fluorosilylated 2-phenylpyridines in good to excellent yields under palladium catalysis. This reaction is the first example of CH fluorosilylation. Single-crystal X-ray structure analysis revealed a Lewis acid–base interaction between the silicon and nitrogen atoms, and the obtained fluorosilylated products are silafluorene equivalents. The fluorosilylated products showed stronger fluorescence than the corresponding silafluorene derivative.
TL;DR: In this article, n-alkyl chains have been successfully grafted into the interlayer space of a Ruddlesden-Popper-type double-layered peroviskite, H2CaTa2O7, via a hydrolysis-esterification process.
Abstract: N-alkyl chains have been successfully grafted into the interlayer space of a Ruddlesden–Popper-type double-layered peroviskite, H2CaTa2O7, via a hydrolysis–esterification process. During the chemical graft process, the parent layered structure is well preserved with magnifying the tailored c lattice parameter. IR and solid-state 13C CP/MAS NMR spectra indicated that oxyalkyl chains were successfully introduced. Thermogravimetric curves of the products exhibit the amount of n-alkoxyl groups per perovskite unit [CaTa2O7] is approximated to 1. A linear relationship with a slope of 0.478 nm per carbon atom is observed between the c lattice parameter and the number of carbon atoms in the n-alkyl chains, which illustrates that the n-alkyl chains form bilayers with a tilt angle of 70°. The photocatalytic activities of these products are also discussed. The 1-octadecanol derivative of H2CaTa2O7 is found to serve as an excellent catalyst for the catalytic reduction of rhodamine B (RhB) and methyl orange (MO), which is set as a novel example of an application of this tailored n-propoxy derivative of H2CaTa2O7.
TL;DR: In this article, an expedient oxidative phosphorylation of pyrroles has been disclosed, in which the reaction of dialkyl phosphite and pyrrole in the presence of AgNO 3 /K 2 S 2 O 8 in DMF/H 2 O (8:1) was shown to produce Pyrrole-2-phosphonates in good yields.
TL;DR: The boron-rich cobaltabisdicarbollide and its 8,8'-I2 derivative (I2-COSAN), both of purely inorganic nature, are shown to accumulate within living cells, where they can be detected using νB-H Raman microspectroscopy, demonstrating an alternative method for cell labelling and detection.
Patent•
14 Mar 2014
TL;DR: An anthracene derivative represented by the following formula (1): wherein L 1 is selected from a single bond and a linking group, and the linking group is selected by linking of 2 to 4 of divalent arylene groups and/or divalent heterocyclic groups as discussed by the authors.
Abstract: An anthracene derivative represented by the following formula (1): wherein in the formula (1), L 1 is selected from a single bond and a linking group, and the linking group is selected from a divalent arylene group, a divalent heterocyclic group, and a group formed by linking of 2 to 4 of divalent arylene groups and/or divalent heterocyclic groups. Ar 1 is selected from the following formulas (2) and (3). In the formulas (2) and (3), X is selected from an oxygen atom and a sulfur atom. In the formula (2), any one of R 11 to R 14 is used for bonding to L 1 . In the formula (3), any one of R 21 to R 24 is used for bonding to L 1 . Ar 2 is selected from a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms and a substituted or unsubstituted heterocyclic group including 5 to 50 ring atoms.
TL;DR: In this article, the σ-silyl donor 1 undergoes chelate-assisted Si-H activation with [RuPhCl(CO)(PPh3)2] and [RhCl(PPh 3)3] to afford the structurally characterized silyl pincer complexes.
TL;DR: In this article, a new water-soluble pillar[6]arene was successfully prepared and combined with a sodium p-hydroxybenzoate derivative to form a supra-amphiphile.
Abstract: A new water-soluble pillar[6]arene was successfully prepared. It complexed with a sodium p-hydroxybenzoate derivative to form a supra-amphiphile. The controllable self-assembly and application in controlled release of this supra-amphiphile in water were investigated.
TL;DR: The efficient synthesis of a new tripodal platform based on a rigid 9,9'-spirobifluorene with three acetyl protected thiol groups in the positions 2, 3' and 6' for deposition on Au(111) surfaces is reported.
Abstract: The efficient synthesis of a new tripodal platform based on a rigid 9,9′-spirobifluorene with three acetyl protected thiol groups in the positions 2, 3′ and 6′ for deposition on Au(111) surfaces is reported. The modular 9,9′-spirobifluorene platform provides both a vertical arrangement of the molecular rod in position 7 and its electronic coupling to the gold substrate. To demonstrate the validity of the molecular design, the model compound 24 exposing a para-cyanophenylethynyl rod is synthesized. Our synthetic approach is based on a metal–halogen exchange reaction of 2-iodobiphenyl derivative and his subsequent reaction with 2,7-disubstituted fluoren-9-one to afford the carbinol 16. Further electrophilic cyclization and separation of regioisomers provided the corresponding 2,7,3′,6′-tetrasubstituted 9,9′-spirobifluorene 17 as the key intermediate. The molecular structure of 17 was determined by single-crystal X-ray diffraction crystallography. The self-assembly features of the target compound 24 were ana...
TL;DR: A 2D condensed benzothiophene derivative TBTDBT was synthesized and a mobility up to 2.62 cm(2) V (-1) s(-1) and an on-off ratio greater than 10(5) could be achieved.
TL;DR: F Fluorine was successfully added across the double bond of various flavones and chromones to form the corresponding 3-fluoroflavones and 3- fluorochromones.
Abstract: Flavonoids are abundant micronutrients in our diet, possessing various biological activities. Fluorine was successfully added across the double bond of various flavones and chromones. The difluoro derivative products were easily dehydrofluorinated to form the corresponding 3-fluoroflavones and 3-fluorochromones.
TL;DR: In this paper, the structure of nitronorbornene derivative C14H12N2O2 synthesized in the reaction of cyclopentadiene with E-2-phenyl-1-cyano-1 -nitroethene was determined by single crystal X-ray diffraction analysis.
Abstract: Structure of nitronorbornene derivative C14H12N2O2 synthesized in the reaction of cyclopentadiene with E-2-phenyl-1-cyano-1-nitroethene was determined by single crystal X-ray diffraction analysis. It was found that in analyzed molecule the nitro group is in endo-position whereas phenyl group have exo-orientation.
TL;DR: A C60 Prato derivative with bis-(t)Bu ester was prepared as a stable and convenient scaffold for the development of fullerene derivatives such as water-soluble C60-PEG conjugates, fulleropeptides via solid phase synthesis, and bis-functionalized C60.
TL;DR: The synthetic approach for chemical oxidation by specific salts of weakly coordinating anions is useful for stable radical cations of tetrathiafulvalene (TTF) and its derivatives in both solution and solid state, which will extend the further research, including structure-property relations on stable radicals for TTF derivatives and new functional materials based on them.
Abstract: After the chemical oxidation of the neutral tetrakis(methylthio)tetrathiafulvalene (TMT-TTF, 1) by specific oxidation agents with weakly coordinating anion, [Al(ORF)4]− [ORF = OC(CF3)3], the radica...