A5087994518- Supramolecular Self-Assembly in Materials
- Nanofabrication and Lithography Techniques
- Molecular Junctions and Nanostructures
- Photochromic and Fluorescence Chemistry
- Lipid Membrane Structure and Behavior
- Polymer Surface Interaction Studies
- Supramolecular Chemistry and Complexes
- Monoclonal and Polyclonal Antibodies Research
- Advanced biosensing and bioanalysis techniques
- Porphyrin and Phthalocyanine Chemistry
- Force Microscopy Techniques and Applications
- Surfactants and Colloidal Systems
- Advanced Polymer Synthesis and Characterization
- Chemical Synthesis and Analysis
- Photoreceptor and optogenetics research
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Molecular Sensors and Ion Detection
- Innovative Microfluidic and Catalytic Techniques Innovation
- Luminescence and Fluorescent Materials
- Nanoparticle-Based Drug Delivery
- Pickering emulsions and particle stabilization
- Dendrimers and Hyperbranched Polymers
- Catalytic Cross-Coupling Reactions
- Glycosylation and Glycoproteins Research
University of Münster
2016-2025
CeNTech
2008-2022
Center for NanoScience
2015-2021
Analytisches Laboratorium
2014-2020
Ghent University
2010-2015
Tsinghua University
2014
Institute of Chemistry
2012
Leiden University
2012
University of Groningen
1996-2009
Leiden University Medical Center
2009
Although a molecular monolayer is only few nanometers thick it can completely change the properties of surface. Molecular monolayers be readily prepared using Langmuir-Blodgett methodology or by chemisorption on metal and oxide surfaces. This Review focuses use chemisorbed self-assembled (SAMs) as platform for functionalization silicon The controlled organization molecules assemblies will have prominent place in "bottom-up" nanofabrication, which could revolutionize fields such...
A simple and high yield synthesis of water-soluble arylazopyrazoles (AAPs) featuring superior photophysical properties is reported. The introduction a carboxylic acid allows the diverse functionalization AAPs. Based on structural modifications switching unit AAPs could be tuned to obtain molecular switches with favorable photostationary states. Furthermore, form stable light-responsive host–guest complexes β-cyclodextrin (β-CD). Our most efficient AAP shows binding affinities comparable...
It's all about polymers! Polymers play a key role in the patterning and functionalization of surfaces by microcontact printing. are versatile stamps, inks substrates printing can provide microstructured polymer single step.
Nonionic amphiphilic cyclodextrins prepared by hydroxyethylation of heptakis(6-alkylthio)-β-cyclodextrins form bilayer vesicles composed solely in water (see schematic representation). Such combine the properties liposomes and macrocyclic host molecules, create new possibilities for development advanced carrier delivery systems.
Print and click: "Click" chemistry can be efficiently combined with microcontact printing. Synthesis in the nanoscale confinement between an elastomeric stamp a reactive substrate leads to desired product within short time, without catalyst, under ambient conditions. As result, 1-octadecyne could printed onto azido-terminated, self-assembled monolayer on silicon oxide (see scheme). Supporting information for this article is available WWW...
A family of amphiphilic cyclodextrins (6, 7) has been prepared through 6-S-alkylation (alkyl=n-dodecyl and n-hexadecyl) the primary side 2-O-PEGylation secondary alpha-, beta-, gamma-cyclodextrins (PEG=poly(ethylene glycol)). These form nonionic bilayer vesicles in aqueous solution. The were characterized by transmission electron microscopy, dynamic light scattering, dye encapsulation, capillary electrophoresis. molecular packing was investigated using small-angle X-ray diffraction bilayers...
Herein we describe the synthesis of negatively charged N-heterocyclic carbene (NHC)-functionalized palladium and gold nanoparticles (NPs), which are stable in water for over 3 months. The formation these NHC–NPs proceeds via an efficient ligand exchange procedure. This method was successfully applied to different NHCs bearing sulfonate carboxylate groups. obtained PdNPs were investigated as catalysts hydrogenation reactions showed high catalytic activity (TON up 2500 TOF 2000 h–1).
The wavelength determines whether DNA is captured in a light-responsive ternary supramolecular complex or released (see scheme). reversible binding of triggered by photoisomerization, which switches the from multivalent to monovalent mode. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited typeset. They made available submitted authors. Please note: publisher responsible for content functionality any...
A pH sensitive carrier is obtained by coating a cyclodextrin vesicle with an adamantane-terminated octapeptide through the formation of inclusion complex. Upon lowering from 7.4 to 5.0, peptide beta-sheets on surface induces transition bilayer sphere fiber. This fully reversible and repeatable. The vesicles release their cargo upon fiber formation.
N-heterocyclic carbenes (NHCs) represent a leading class of ligands in organometallic chemistry, but have been rarely exploited as stabilizers for metal nanoparticles (NPs). We report the first example NHC stabilized Pd-NPs that demonstrate long term stability. These were synthesized by facile ligand exchange protocol using rationally designed chained NHCs (LC-NHCs). Furthermore, we surface modification results significant chemoselectivity model reaction.
The synthesis of four different bidentate hybrid NHC-thioether ligands is presented. corresponding palladium nanoparticles are stable in various solvents, depending on the ligand used, and show high chemoselectivity hydrogenation olefins. solubility can be switched multiple times pH value solvent. XPS analysis (which shows a subtle shift binding energy) was identified as convenient tool to establish mode NHC ligands.
Supramolecular glue: The photoinduced isomerization of difunctional azobenzenes can be used to induce and reverse the molecular recognition adhesion bilayer vesicles made up cyclodextrin (CD) molecules. basis this light-responsive supramolecular glue is cis–trans azobenzene (see picture; black circles CD, green trans-azobenzene, red cis-azobenzene). Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or...
Getting the green light! Substituted arylazopyrazoles (AAPs) have been investigated as supramolecular photoswitches in aqueous solution. Selective photostationary states (PSSs) and improved binding affinities to β-cyclodextrin determined (see figure). The experimental findings are supported by results from DFT calculations. As a service our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed may be re-organized for online delivery, but...
Based on the combination of unique features both polyionic liquids and spherical colloidal crystals, a new class inverse opaline spheres with series distinct properties was fabricated. It found that such photonic could not only be used as stimuli-responsive microgels, but also serve multifunctional microspheres mimic main characteristics conventional molecules, including intrinsic optical properties, specific molecular recognition, reactivity derivatization, anisotropy.
Triazolinedione (TAD) click reactions were combined with microcontact chemistry to print, erase, and reprint polymer brushes on surfaces. By patterning substrates a TAD-tagged atom-transfer radical polymerization initiator (ATRP-TAD) subsequent surface initiated ATRP, it was possible graft micropatterned from both alkene- indole-functionalized substrates. As result of the dynamic nature Alder-ene adduct TAD indole at elevated temperatures, pattern could be erased while regenerated substrate...
Abstract Patterned monolayers of N‐heterocyclic carbenes (NHCs) on gold surfaces were obtained by microcontact printing NHC–CO 2 adducts and NHC(H)[HCO 3 ] salts. The NHC‐modified areas showed an increased conductivity compared to unmodified surface areas. Furthermore, the remaining could be modified with a second, azide‐functionalized carbene, facilitating further applications post‐printing modifications. Thorough elucidation variety analytical methods offers comprehensive evidence for...
Chemical reaction networks (CRN) embedded in hydrogels can transform responsive materials into complex self-regulating that generate feedback to counter the effect of external stimuli. This study presents containing β-cyclodextrin (CD) and ferrocene (Fc) host-guest pair as supramolecular crosslinks where redox-responsive behavior is driven by enzyme-fuel couples horse radish peroxidase (HRP)-H
Self-assembled monolayers of cyclodextrin receptor molecules on gold or silicon oxide surfaces function as molecular printboards to which with complementary recognition motifs can be transferred selectively by writing printing. One example demonstrating the application this methodology is supramolecular microcontact printing dendrimers loaded fluorescent dyes (see confocal microscopy images after loading rose bengal and fluorescein). Supporting information for article available WWW under...
Silica nanoparticles functionalized with β-cyclodextrin (CD) host molecules (5) have been prepared by reacting carboxylic active ester-terminated silica (4) CD heptamine. glucosamine (6), having similar surface properties as 5 but lacking the host−guest recognition motif, were used to perform blank experiments. The CD-functionalized determined TEM be 55 ± 6 nm in size. They exhibited pH-dependent aggregation, which is explained presence of free amino and acid groups on particle surface, was...