Uniform core–shell Pd@IRMOF-3 nanostructures, where single Pd nanoparticle core is surrounded by amino-functionalized IRMOF-3 shell, are prepared a facile mixed solvothermal method. When used as multifunctional catalysts, the nanocomposites exhibit high activity, enhanced selectivity, and excellent stability in cascade reaction. Both experimental evidence theoretical calculations reveal that catalytic performance of originates from their unique structures.

Photodegradation of rhodamine B in the presence H2O2 by visible light over α-Fe2O3 architectures has been investigated (see picture; left to right: 1D nanorods, 2D nanoplates, 3D nanocubes). A link between exposed facets and their photoreactivity is established, following {110}>{012}≫{001}. Structure–reactivity correlations are a central theme heterogeneous catalysis.1–4 In general, crystallographic surface structure catalyst determined its facets, enclosed particle-like turn determine...

A resettable logic system based on spiropyran-modified gold nanoparticles that is capable of AND, OR, and INHIBIT operations has been constructed. Several methods can record the output this process, including naked eye, UV/Vis spectroscopy, determination ζ potential, dynamic light scattering. These gates also detect copper(II) ions in aqueous media. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or...

The design and fabrication of chiral nanostructures is a promising approach to realize enantiomeric recognition separation. In our work, gold nanorod@chiral mesoporous silica core-shell nanoparticles (GNR@CMS NPs) have been successfully synthesized. This novel material exhibits strong tunable circular dichroism signals in the visible near-infrared regions due optical coupling between CMS shells GNR cores. When cysteine molecules are loaded porous shells, corresponding surface enhanced Raman...

A voltage difference is detected in the "generator" part of individual water-filled SWNTs when a current applied on their "motor" part. It suggested that measured reveals newly induced electromotive force, which generated by water flow inside SWNT. The molecules nanotube channel are turn dragged to Supporting information for this article available WWW under http://www.wiley-vch.de/contents/jc_2089/2008/adma200702956_s.pdf or from author. Please note: publisher not responsible content...

Over many years chemists have established the general principle that two-dimensional chemical structures constructed with pure sp2-carbon atoms will definitely form an aromatic system delocalized electron density. However, based on a recently proposed structure, graphenylene, this rule may finally be broken. Herein, we predict properties of new network known as which is first example non-delocalized structure composed cyclohexatriene units two quite distinct C–C bonds within C6 ring. In...

Reactions of neutral vanadium oxide clusters with small hydrocarbons, namely C2H6, C2H4, and C2H2, are investigated by experiment density functional theory (DFT) calculations. Single photon ionization through extreme ultraviolet (EUV, 46.9 nm, 26.5 eV) vacuum (VUV, 118 10.5 lasers is used to detect cluster distributions reaction products. The most stable VO2, V2O5, V3O7, V4O10, etc. tend associate C2H4 generating products VmOnC2H4. Oxygen-rich VO3(V2O5)n=0,1,2..., (e.g., VO3, V3O8, V5O13)...

As an emerging type of optically active materials, chiral molecules-stabilized semiconductor quantum dots (QDs) have achieved extensive attention. Unfortunately, understanding the optical characteristics QDs observed by circular dichroism (CD) spectroscopy remains a great challenge due to their rather weak signals. Herein, we successfully achieve much enhanced CD responses from l- or d-cysteine-stabilized wurtzite CdSe rods (QRs) thanks unique anisotropy. Furthermore, activity QRs is...

We report a method for rapid, effective detection of both Cr(iii) and Cr(vi) (in the form Cr(3+) Cr2O7(2-), main species chromium in natural environment) by making use meso-2,3-dimercaptosuccinic acid (DMSA)-functionalized gold nanoparticles (Au NPs). The limit (LOD) is 10 nM with naked eye assay can be applied detecting polluted soil from Yun-Nan Province Southwest China. density functional theory to calculate change Gibbs free energy (ΔG) interactions between DMSA-Au NP system various...

Abstract A new symmetrical sugar‐based perylenediimide derivative PTCDI‐BAG is synthesized and its aggregate morphologies formation mechanisms are studied in detail the mixed solvent system water/ N,N ‐dimethylformamide (H 2 O/DMF) with changing volume ratios. molecules self‐assemble into planar ribbons 20/80 40/60 H O/DMF (v/v), but their chiralities opposite according to recorded circular dichroism (CD) spectra. With a further increase of water content, only left‐handed helical nanowires...

A donor–acceptor polymer with broad absorption from 300 to 1700 nm as a photothermal material toward highly efficient solar-driven water evaporation.

A selective invitation: 2D hydrogen-bonded porous network formed by an azobenzene derivative (NN4 A) contains two different types of cavities and is shown to selectively accommodate fullerenes C80 Sc3N§C80 (see picture). Highly ordered fullerene arrays are constructed at the liquid–solid interface graphite coadsorption NN4 A. While C60 occupies both cavity, only immobilized in one cavity type. Supporting information for this article available on WWW under...

We have studied the self-assembly process of a typical biocoordination polymer, Ag(I)/cysteine (Cys), with different chiralities amino acid. Self-assembly Ag(I)/l-Cys leads to production pure right-handed helical nanobelts, whereas Ag(I)/d-Cys gives rise "mirror image", i.e., left-handed nanobelts. As comparison, racemic Ag(I)/dl-Cys forms totally product, two-dimensional achiral nanosheets. Density functional theory simulation revealed that molecular chirality Cys is originally programmed...

Molecular structures are known to significantly impact the adsorption and assembling behavior of adsorbates on surfaces. Precise control molecular orientation ordering will enable us tailor physical chemical properties architectures. In this work, we present a strategy attaching functional groups with dissimilar characteristics top bottom phthalocyaninato moieties triple-decker complex, orientational-dependent such molecules at liquid/solid interface has been identified, which is attributed...

Visible-light induced degradation of an aqueous mixture containing MO and RhB on well-defined α-Fe2O3 nanocrystals shows that is more favorable such selectivity the {012} facet greater than {001}. The origin rationalized as inherent surface structural difference preferential molecular adsorption. As a service to our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be re-organized for online delivery, but not copy-edited...

Controlled regulation of the switchable behavior supramolecular network is central to potential application in molecular scale nanodevices. In this work, it reported that reversible accommodation guest molecules nanoporous can be regulated by UV/visible light. The complex template TCDB/4NN-Macrocycle(trans,trans,trans,trans) with photosensitive units well-defined. After UV irradiation, switched on encapsulate coronene due formation a new photoisomer(trans,cis,trans,cis) and off expel from...

Chiral amplification and discrimination are great challenges in both scientific technological research fields such as chemical synthesis, chiral catalysis, biomedicine. By mimicking protein superstructures nature, conducting polyaniline (PANI) molecules induced by dopants were self-assembled to ultra-ordered superhelical microfibers. The homochirality is observed be amplified into different hierarchies, from helical nanostructures, microstructures. Furthermore, experimental theoretical...

Electron-rich (donor) and electron-deficient (acceptor) units to construct donor–acceptor (D–A) conjugated macrocycles were investigated elucidate their interactions with fullerene. Triphenylamine 4,7-bisthienyl-2,1,3-benzothiadiazole alternately linked through acetylene, as the donor acceptor units, respectively, for pentagonal 3B2A hexagonal 4B2A macrocycles. As detected by scanning tunneling microscopy, both D–A found form an interesting concentration-controlled nanoporous monolayer on...

Mn-doped CeO2 and with the same morphology (nanofiber nanocube) have been synthesized through hydrothermal method. When applied to benzene oxidation, catalytic performance of is better than that CeO2, due difference concentration O vacancy. Compared morphology, more oxygen vacancies were generated on surface replacement Ce ion Mn ion. The lattice has analyzed XRD, Raman, electron energy loss spectroscopy paramagnetic resonance technology. formation energies vacancy different exposed crystal...

Abstract Uncooled broadband spectrum detection, spanning from visible to mid‐wave‐infrared regions, offers immense potential for applications in environmental monitoring, optical telecommunications, and radar systems. While leveraging proven technologies, conventional photodetectors are encumbered by high dark currents the necessity cryogenic cooling. Correspondingly, innovative low‐dimensional materials like black phosphorus manifest weak photoresponse instability. Here, tantalum nickel...

We have developed a low-cost and effective method to align single-walled carbon nanotubes (SWNTs) using series of diamond wire drawing dies. The obtained SWNTs are highly dense perfectly aligned. X-ray diffraction (XRD) indicates that the aligned (HDPA-SWNTs) form two-dimensional triangular lattice with constant 19.62 Å. observe sharp (002) reflection in XRD pattern, which should be ascribed an intertube spacing 3.39 Å adjacent SWNTs. Raman spectra reveal radical breath mode (RBM) larger...

Flächenwirkung: Der Photoabbau von Rhodamin B an α-Fe2O3 in Gegenwart H2O2 durch sichtbares Licht wurde untersucht (siehe Bild; links nach rechts: 1D-Nanostäbe, 2D-Nanoplättchen, 3D-Nanowürfel). Eine Beziehung zwischen den exponierten Flächen α-Fe2O3-Strukturen und ihrer Photoreaktivität gemäß {110}>{012}≫{001} gefunden. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made...

Abstract Nanoparticle self-assembly promises scalable fabrication of composite materials with unique properties, but symmetry control assembled structures remains a challenge. By introducing governing force in the assembly process, we develop strategy to symmetry. As demonstration, realize tetragonal superlattice octagonal gold nanorods, breaking through only hexagonal so far. Surprisingly, such sparse superstructure exhibits much higher thermostability than its close-packed counterpart....

Nanotribology has been given increasing attention by researchers in pursuing the nature of friction. In present work, an approach that combines supramolecular assembly and nanotribology is introduced. Herein, nanotribological study was carried out on seven template networks [namely, hydrogen bond induced tricarboxylic acids van der Waals force hexaphenylbenzene (HPB) derivatives]. The networks, as well host–guest assemblies molecules different forces, were constructed highly oriented...