Abstract We introduce nitrile imine‐mediated tetrazole–ene cycloadditions (NITEC) in the presence of upconversion nanoparticles (UCNPs) as a powerful covalent coupling tool. When pyrene aryl tetrazole derivative ( λ abs, max =346 nm) and UCNPs are irradiated with near‐infrared light at 974 nm, rapid conversion into reactive imine occurs. In an electron‐deficient double bond, quantitative pyrazoline cycloadduct is observed under ambient conditions. The combination NITEC UCNP technology used...

We introduce a photoresist based on methacrylate copolymers bearing photochromic spirothiopyran moieties as side groups that can crosslink via supramolecular interaction between the chromophores. Upon two-photon excitation, resist is capable of generating freestanding three-dimensional structures and offers an inhibition channel, which allows for stimulated-emission depletion-inspired laser lithography. Reversible inhibition, linewidth narrowing, resolution enhancement are demonstrated.

As one of the best studied photoswitches, spiropyrans (SPs) have attracted significant interest in scientific community. Among many stimuli to alter isomerization into merocyanine (MC) isomer, such as temperature, pH, solvent polarity, redox potential, or mechanical force, ability MC form act a ligand site for metal complexation has recently raised new attention. We herein synthesize hitherto undescribed coordination compounds...

The <italic>para</italic>-fluoro-thiol ligation is performed for the first time in aqueous medium and shown to be controlled by pH. Solution kinetics various conditions of pH, temperature, concentration are reported, together with an application modification a polymeric tissue culture dish peptide.

We exploit λ-orthogonal photoligation of nitrile imine-mediated tetrazole-ene cycloaddition (NITEC) chemistry to generate complex, interconnected surface modifications via a simple layered patterning approach. By judicious choice activating chromophores, we introduce one pot reaction where imine formation can be triggered independently other tetrazoles present. When irradiated with visible light, tetrazole bearing pyrene chromophore undergoes quantitative elimination nitrogen release (which...

The synthesis of linear symmetric ethynyl- and acetylide-amidinates the coinage metals is presented. Starting with desilylation complexes [{Me3 SiC≡CC(NDipp)2 }2 M2 ] (Dipp=2,6-diisopropylphenyl) (M=Cu, Au) it demonstrated that this compound class suitable to serve as a versatile metalloligand. Deprotonation n-butyllithium subsequent salt metathesis reactions yield tetranuclear gold(I) acetylide form [{(PPh3 )AuC≡CC(NDipp)2 Au). corresponding Ag complex Ag2 was obtained by different route...

Abstract Wir berichten über eine Nitrilimin‐vermittelte Tetrazol‐En‐Cycloaddition (NITEC) in Gegenwart von Photonen‐aufkonvertierenden Nanopartikeln (UCNPs) als effiziente Verknüpfungsmethode. Werden Pyren‐Aryltetrazol‐Derivate ( λ abs,max =346 nm) UCNPs mit Nahinfrarotlicht bei 974 nm bestrahlt, so wird das Tetrazol rasch zu einem reaktiven Nitrilimin umgesetzt. In einer elektronenarmen Doppelbindung reagiert entstandene unter Umgebungsbedingungen quantitativ Pyrazolin‐Cycloaddukt. Die...

Igor Yanson showed 38 yr ago for the first time a point-contact measurement where he probed energy resolved spectroscopy of electronic scattering inside metal. Since this measurement, point contact (PCS) technique improved enormously. The application scanning probe microscopy (SPM) techniques in late 1980 s allowed achieving contacts with diameter single atom. With introduction mechanically controlled break junction technique, even on freely suspended chains atoms could be performed. In...

A new lift-off technique for microcontact printing of thiol-terminated alkane chains on gold to oxide surfaces is presented here. The involves transferring the stamped pattern (the Figure shows a self-assembled monolayer octadecylsilane) onto silicon surface, giving greater control over environmental parameters. Specific substrates are not required technique, which should thus be available wide variety surfaces.

Abstract A tetrazole‐based photoligation protocol for the spatially‐resolved encoding of various defined metallopolymers onto solid surfaces is introduced. By using this approach, fabrication bi‐ and trifunctional metallopolymer with different metal combinations were achieved. Specifically, α‐ω‐functional copolymers containing bipyridine as well triphenylphosphine ligands synthesized through reversible addition‐fragmentation chain transfer (RAFT) polymerization, subsequently loaded to afford...

Abstract A platform technology for the creation of spatially resolved surfaces encoded with a monolayer consisting different metal complexes was developed. The concept entails light‐triggered activation self‐ assembled (SAM) UV‐labile anchors, that is, phenacylsulfides, and subsequent cycloaddition selected diene‐functionalized at defined areas on surface. synthesis characterization UV‐light assisted anchoring surface detailed study short‐chain oligomer model system in solution confirm high...

The synthesis of linear symmetric ethynyl- and acetylide- amidinates the coinage metals is presented. Their photophysical properties were thoroughly investigated over a temperature range 20—295 K. All compounds show azure, bright blue, or blue-green microsecond-long phosphorescence in solid state. Short lifetimes quantum yields up to 41 % determined. Furthermore, complexes pronounced PL thf solution as well. KIT logo on cover represents photography some substances under irradiation with...

One surface to bind them all: The spatially-resolved patterning of Au, Pd, and Pt metallopolymers by photoligation is presented. Specifically, α-ω-functional copolymers containing bipyridine, as well triphenylphosphine metal complexes, were synthesized through reversible addition-fragmentation chain transfer (RAFT) polymerization. Up three different bound a single on defined positions characterized ToF-SIMS XPS mappings. More information can be found in the Full Paper V. Trouillet, P. W....