Spin-crossover coordination nanoparticles of the cyanide-bridged three-dimensional network Fe(pyrazine){Pt(CN)4} were prepared at three different sizes using a microemulsion. The 14 nm particles present transition centered around 265 K with hysteresis 6 K.

Co/Fe Prussian Blue analogues are known to display both thermally and light induced electron transfer attributed the switching between diamagnetic {FeIILS(μ-CN)CoIIILS} paramagnetic {FeIIILS(μ-CN)CoIIHS} pairs (LS = low spin; HS high spin). In this work, a dinuclear cyanido-bridged complex, smallest {Fe(μ-CN)Co} moiety at origin of remarkable physical properties these systems, has been designed by rational building-block approach. Combined structural, spectroscopic, magnetic photomagnetic...

Anisotropic nanoparticles of the Fe(pyrazine)Pt(CN)4 network were prepared embedded in various matrices that revealed to have a dramatic effect on cooperative spin crossover phenomena. By judicious choice nature matrix and control interparticle distances, hysteresis 15 K was achieved close room temperature for such nano-objects.

Currently available methodologies arguably lack the exquisite control required for producing metal–organic framework (MOF) thin films of sufficient quality electronic applications. By directing MOF transfer with self-assembled monolayers (SAMs), we achieve very smooth, homogeneous, highly oriented, ultrathin across millimeter-scale areas that display moderate conductivity likely due to electron hopping. Here, SAM is key thereby enlarging number and nature substrates choice. We have exploited...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWittig versus Corey-Chaykovsky Reaction. Theoretical study of the reactivity phosphonium methylide and sulfonium with formaldehydeF. Volatron O. EisensteinCite this: J. Am. Chem. Soc. 1987, 109, 1, 1–14Publication Date (Print):January 1987Publication History Published online1 May 2002Published inissue 1 January 1987https://doi.org/10.1021/ja00235a001RIGHTS & PERMISSIONSArticle Views996Altmetric-Citations93LEARN ABOUT THESE METRICSArticle Views are...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction between d6 ML5 metal fragments and hydrogen: .eta.2-H2 vs. dihydride structureY. Jean, O. Eisenstein, F. Volatron, B. Maouche, SeftaCite this: J. Am. Chem. Soc. 1986, 108, 21, 6587–6592Publication Date (Print):October 1, 1986Publication History Published online1 May 2002Published inissue 1 October 1986https://pubs.acs.org/doi/10.1021/ja00281a023https://doi.org/10.1021/ja00281a023research-articleACS PublicationsRequest reuse...

Through an extensive set of SQUID magnetic measurements, X-ray absorption spectroscopy, and circular dichroism, we have determined the nature metastable photomagnetic phase in cyano-bridged 3D network Cs2Cu7[Mo(CN)8]4. The effect is induced by photoconversion Mo(IV) ions low spin (LS) configuration (S = 0) into high (HS) 1). spectroscopic measurements fully support LS to HS conversion, whereas previously invoked charge transfer mechanism + Cu(II) ⇒ Mo(V) Cu(I) can be completely ruled out.

Polyoxometalates (POMs) are unconventional electro-active molecules with a great potential for applications in molecular memories, providing efficient processing steps onto electrodes available. The synthesis of the organic-inorganic polyoxometalate hybrids [PM$_{11}$O$_{39}$(Sn(C$_6$H$_4$)C$\equiv$C(C$_6$H$_4$)N$_2$)]$^{3-}$ (M = Mo, W) endowed remote diazonium function is reported together their covalent immobilization hydrogenated n-Si(100) substrates. Electron transport measurements...

Anisotropic coordination nanoparticles of the photomagnetic network Cs(I)(2)Cu(II)(7)[Mo(IV)(CN)(8)](4) are obtained through a surfactant-free high-yield synthetic procedure in water. These particles organised as Langmuir-Blodgett films with preferential orientation nano-objects within film that exhibit magnetic bistability below 20 K very large coercivity due to an efficient photo-transformation.

Electron transport/trapping through a densely-packed polyoxometalate layer on silicon.

A 2D supramolecular honeycomb network built on hydrogen bonding of perylene-3,4,9,10-tetracarboxylic acid diimide (PTCDI) and 1,3,5-triazine-2,4,6-triamine (Melamine) has been self-assembled Au(111) by a solution processed method. The ability the porous to host functional molecular oxides or polyoxometalates (POMs) investigated using functionalized species [PW11O39Ge{p-C6H4-C≡C–C6H4-NHC(O) (CH2)4{-CH(CH2)2S-S-}}]4– (KWGe[S-S]): this inorganic/organic hybrid Keggin-type POM core an organic...

We highlight the key role of counterions in modulating conductance molecular junctions polyoxometalate monolayers self-assembled on flat gold electrodes, connected by tip a conductive atomic force microscope.

We report on the electronic properties of redox active polyoxometalates at nanoscale using conducting AFM and nanodot molecular junctions.

We demonstrate the reversible in situ photoreduction of molecular junctions a phosphomolybdate [PMo12O40]3- monolayer self-assembled on flat gold electrodes, connected by tip conductive atomic force microscope. The conductance one electron reduced [PMo12O40]4- junction is increased ∼10, and this open-shell state stable air at room temperature. analysis large current-voltage dataset unsupervised machine learning clustering algorithms reveals that transport pristine leads to symmetric curves,...

Nanocrystals are often described as interesting materials for the design of low-cost optoelectronic devices, especially in infrared range. However, driving reaching absorption generally contain heavy metals (Pb and Hg) with a high toxicity. An alternative strategy to achieve transition is use doped semiconductors presenting intraband or plasmonic short-, mid-, long-wave infrared. This may offer more flexibility regarding range possible candidate materials. In particular, significant progress...

Immobilization of polyoxometalates (POMs) onto oxides is relevant to many applications in the fields catalysis, energy conversion/storage, or molecular electronics. Optimization and understanding molecule/oxide interface crucial rationally improve performance final materials. We herein describe synthesis covalent grafting POM hybrids with remote carboxylic acid functions flat Si/SiO2 substrates. Special attention has been paid characterization layer description anchoring mode at oxide...

Abstract The local symmetry and magnetic properties of 6 nm‐sized, bimetallic, cyanide‐bridged CsNiCr(CN) coordination nanoparticles 1 8 trimetallic, @CsCoCr(CN) core–shell 2 were studied by X‐ray absorption spectroscopy (XAS) circular dichroism (XMCD). measurements performed at the Ni II , Co Cr III L 2,3 edges. This study revealed presence distorted sites located on particle surface that account for uniaxial anisotropy observed SQUID measurements. For particles, a combination exchange...

Intraband and plasmonic transitions have appeared over the last years as an interesting tool to achieve optical absorption in mid-infrared. Tuning doping magnitude has become a major challenge not only tune spectrum but also properties such dark current or time response. Here, we investigate case of self-doped HgSe colloidal quantum dots (CQDs). At present, tuning relies on band bending induced by dipole design at nanoparticle surface. With surface gating approach, it is difficult conciliate...

The polyoxomolybdate hybrid TBA3[PMo11O39{Sn(C6H4)C≡C(C6H4)N2}] KMoSn[N2+] was prepared through Sonogashira-type coupling between TBA4[PMo11O39{Sn(C6H4)I}] KMoSn[I] and an excess of 3,3-diethyl-1-(4-ethynylphenyl)triaz-1-ene bearing a protected diazonium function, followed by its deprotection the addition trifluoroacetic acid (TFA). This enlarges family organic–inorganic polyoxomolybdate-based hybrids, which has been far less investigated than their related polyoxotungstates. function allows...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical study of the conformation cis carbene-olefin-transition metal complexes: back-donation vs. ligand-ligand interactionF. Volatron and O. EisensteinCite this: J. Am. Chem. Soc. 1986, 108, 9, 2173–2179Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 1986https://doi.org/10.1021/ja00269a009RIGHTS & PERMISSIONSArticle Views163Altmetric-Citations24LEARN ABOUT THESE METRICSArticle...

The amplification effect of polyoxometalates (POMs) on the efficiency dye-sensitized nano-ITO cathodes is disclosed. use hybrid type [PW11O39{SnC6H4≡C6H4F}]4–, F standing for a carboxylic group (POM-COOH) or diazonium unit, allows control loading POMs electrode and investigation key parameters. Even at very low loading, POM-COOH has substantial photocurrent response with up to 25-fold increase. Besides ensuring stability toward leaching, anchoring function POM hybrids was also found play an...

Identifying descriptors that govern charge transport in molecular electronics is of prime importance for the elaboration devices. The effects molecule characteristics, such as size, bulkiness or charge, have been widely reported. Herein, we show polarizability can be a crucial parameter to consider. To this end, platinum nanoparticle self-assemblies (PtNP SAs) are synthesized solution, including series polyoxometalates (POMs). POM unit modified according nature central heteroatom while...

We demonstrate a high electron conductivity (>102 S/cm and up to 103 S/cm) of tungsten suboxide W18O52.4−52.9 (or equivalently WO2.91−2.94) nanotubes (2–3 nm in diameter, ∼μm long). The is measured the temperature range 120–300 K by four-probe scanning tunneling microscope ultrahigh vacuum. are synthesized low-temperature low-cost solvothermal method. They self-assemble bundles hundreds forming nanowires (∼μm long, few tens wide). observe large anisotropy with ratio (longitudinal...