Surface activity of modified dendrimers at high compression

Dendrimers at surfaces and interfaces: chemistry and applications

“…Hawker, White, and co-workers also explored the effect of peripheral group chemistry on the surface activity of dendrimers at the air-water interface. 11 For this study, poly(benzyl ether) dendrons were again synthesized with a single alcohol at the focal point but also included either nitrile or methyl ester functional groups at their periphery. The Langmuir film structure of these dendrimers was also analyzed by neutron specular reflectivity and P-A isotherm measurements.…”

Nanostructuring polymers, colloids, and nanomaterials at the air–water interface through Langmuir and Langmuir–Blodgett techniques

“…A major reason is that the hydrophilic groups provide additional anchoring points to the water surface, inhibiting the formation of a second layer. 63 By substituting a hexa(ethylene glycol) tail at the core of [G-4] monodendron (Case II), the stability of Langmuir films will rely on the relative sizes between the hydrophobic and hydrophilic groups. With increasing sizes of the dendritic molecules, the collapsed monolayer behaves more like a bilayer.…”

Excitation Energy Transfer between a First Generation Dendrimer and a Pyrene Derivative in Langmuir−Blodgett Multilayers

“…The interaction of adjustable functional groups in dendrimers with changeable molecule shapes of higher generation dendrimers offers the intriguing possibility to study properties of dendrimers in general and also at surfaces and interfaces (solid-air; liquid−air). Several studies of the behavior of dendrimers at different interfaces were performed using a variety of techniques. − The use of atomic force microscopy and scanning force microscopy led to the examination of properties of thin films and isolated or aggregated dendrimer particles on solid substrates using the self-assembly technique. − These also include dendrimer-modified self-assembled monolayers for the sensoring of volatile organic compounds by surface acoustic wave device measurements, the proof of well-defined, ordered arrays via metal-initiated self-assembly of dendrimers and bridging ligands, or the time-dependent phase-segregation of dendrimer/ n -alkanethiol mixed monolayers . The use of the Langmuir technique allowed us to investigate the properties of dendrimer films at the water−air interface. − The formation of defined Langmuir−Blodgett layers based on dendritic compounds on solid substrates was also carried out to examine the influence of dendritic structures on the surface morphology and topology of Langmuir−Blodgett monolayers. − Besides these investigations, Meijer et al could show that the anchored photoresponsive substituents in poly(propylene imine) dendrimer prevented microphase separation of the azobenzene moieties within the monolayers, resulting in stable and photoresponsive Langmuir and LB films.…”

“…Several studies of the behavior of dendrimers at different interfaces were performed using a variety of techniques. [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] The use of atomic force microscopy and scanning force microscopy led to the examination of properties of thin films and isolated or aggregated dendrimer particles on solid substrates using the self-assembly technique. [16][17][18][19][20][21][22][23][24][25] These also include dendrimer-modified self-assembled monolayers for the sensoring of volatile organic compounds by surface acoustic wave device measurements, 17 the proof of well-defined, ordered arrays via metal-initiated selfassembly of dendrimers and bridging ligands, 21 or the timedependent phase-segregation of dendrimer/n-alkanethiol mixed monolayers.…”

“…22 The use of the Langmuir technique allowed us to investigate the properties of dendrimer films at the water-air interface. [16][17][18][19][20][21][22][23][24][25][26][27][28] The formation of defined Langmuir-Blodgett layers based on dendritic compounds on solid substrates was also carried out to examine the influence of dendritic structures on the surface morphology and topology of Langmuir-Blodgett monolayers. [29][30][31][32][33][34] Besides these investigations, Meijer et al 33 could show that the anchored photoresponsive substituents in poly-(propylene imine) dendrimer prevented microphase separation of the azobenzene moieties within the monolayers, resulting in stable and photoresponsive Langmuir and LB films.…”