Chemistry - A European Journal
SCIE-ISI SCOPUS (1995-2025)
1521-3765
0947-6539
Đức
Cơ quản chủ quản: Wiley-VCH Verlag , WILEY-V C H VERLAG GMBH
Lĩnh vực:
Chemistry (miscellaneous)CatalysisOrganic Chemistry
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Các bài báo tiêu biểu
A Rationale for the Large Breathing of the Porous Aluminum Terephthalate (MIL‐53) Upon Hydration
Tập 10 Số 6 - Trang 1373-1382 - 2004
AbstractAluminum 1,4‐benzenedicarboxylate Al(OH)[O2CC6H4CO2]⋅
[HO2CC6H4CO2H]0.70 or MIL‐53 as (Al) has been hydrothermally synthesized by
heating a mixture of aluminum nitrate, 1,4‐benzenedicarboxylic acid, and water,
for three days at 220 °C. Its 3 D framework is built up of infinite trans chains
of corner‐sharing AlO4(OH)2 octahedra. The chains are interconnected by the
1,4‐benzenedicarboxyl...
Molecular Single‐Bond Covalent Radii for Elements 1–118
Tập 15 Số 1 - Trang 186-197 - 2009
AbstractA self‐consistent system of additive covalent radii, R(AB)=r(A) + r(B),
is set up for the entire periodic table, Groups 1–18, Z=1–118. The primary bond
lengths, R, are taken from experimental or theoretical data corresponding to
chosen group valencies. All r(E) values are obtained from the same fit. Both
E–E, E–H, and E–CH3 data are incorporated for most elements, E. Many E–E′ data
inside ...
Shape‐Controlled Synthesis of Metal Nanostructures: The Case of Silver
Tập 11 Số 2 - Trang 454-463 - 2005
AbstractThe concept of shape‐controlled synthesis is discussed by investigating
the growth mechanisms for silver nanocubes, nanowires, and nanospheres produced
through a polymer‐mediated polyol process. Experimental parameters, such as the
concentration of AgNO3 (the precursor to silver), the molar ratio between
poly(vinylpyrrolidone) (PVP, the capping agent) and AgNO3, and the strength of
chemica...
Chemical and Structural Properties of Carbonaceous Products Obtained by Hydrothermal Carbonization of Saccharides
Tập 15 Số 16 - Trang 4195-4203 - 2009
AbstractCarbon‐rich‐quick scheme: A carbon‐rich solid product made up of uniform
micrometer‐sized spheres of tunable diameter has been synthesized by the
hydrothermal carbonization of saccharides. These microspheres possess a
core–shell chemical structure based on the different nature of the oxygen
functionalities between the core and the outer layer (see figure).magnified
imageA carbon‐rich solid...
Ionothermal Synthesis of Crystalline, Condensed, Graphitic Carbon Nitride
Tập 14 Số 27 - Trang 8177-8182 - 2008
AbstractHerein we report the synthesis of a crystalline graphitic carbon
nitride, or g‐C3N4, obtained from the temperature‐induced condensation of
dicyandiamide (NH2C(NH)NHCN) by using a salt melt of lithium chloride and
potassium chloride as the solvent. The proposed crystal structure of this g‐C3N4
species is based on sheets of hexagonally arranged s‐heptazine (C6N7) units that
are held togethe...
Semiconductor Behavior of a Metal‐Organic Framework (MOF)
Tập 13 Số 18 - Trang 5106-5112 - 2007
AbstractUpon light excitation MOF‐5 behaves as a semiconductor and undergoes
charge separation (electrons and holes) decaying in the microsecond time scale.
The actual conduction band energy value was estimated to be 0.2 V versus NHE
with a band gap of 3.4 eV. Photoinduced electron transfer processes to viologen
generates the corresponding viologen radical cation, while holes of MOF‐5
oxidizes N,N...
Synthesis, X‐ray Crystal Structures, and Gas Sorption Properties of Pillared Square Grid Nets Based on Paddle‐Wheel Motifs: Implications for Hydrogen Storage in Porous Materials
Tập 11 Số 12 - Trang 3521-3529 - 2005
AbstractA systematic modulation of organic ligands connecting dinuclear
paddle‐wheel motifs leads to a series of isomorphous metal‐organic porous
materials that have a three‐dimensional connectivity and interconnected pores.
Aromatic dicarboxylates such as 1,4‐benzenedicarboxylate (1,4‐bdc),
tetramethylterephthalate (tmbdc), 1,4‐naphthalenedicarboxylate (1,4‐ndc),
tetrafluoroterephthalate (tfbdc),...
Unmasking Melon by a Complementary Approach Employing Electron Diffraction, Solid‐State NMR Spectroscopy, and Theoretical Calculations—Structural Characterization of a Carbon Nitride Polymer
Tập 13 Số 17 - Trang 4969-4980 - 2007
AbstractPoly(aminoimino)heptazine, otherwise known as Liebig's melon, whose
composition and structure has been subject to multitudinous speculations, was
synthesized from melamine at 630 °C under the pressure of ammonia. Electron
diffraction, solid‐state NMR spectroscopy, and theoretical calculations revealed
that the nanocrystalline material exhibits domains well‐ordered in two
dimensions, thereb...
Organocatalysis Mediated by (Thio)urea Derivatives
Tập 12 Số 21 - Trang 5418-5427 - 2006
AbstractOver the last decade the potential for N,N‐dialkyl(thio)urea derivatives
to serve as active metal‐free organocatalysts for a wide range of synthetically
useful reactions susceptible to the influence of general acid catalysis has
begun to be realised. This article charts the development of these catalysts
(with emphasis on the design principles involved), from early “proof‐of‐concept”
mater...
The Rich Stereochemistry of Eight‐Vertex Polyhedra: A Continuous Shape Measures Study
Tập 11 Số 5 - Trang 1479-1494 - 2005
AbstractA stereochemical study of polyhedral eight‐vertex structures is
presented, based on continuous shape measures (CShM). Reference polyhedra, shape
maps, and minimal‐distortion interconversion paths are presented for
eight‐vertex polyhedral and polygonal structures within the CShM framework. The
application of these stereochemical tools is analyzed for several families of
experimental structu...