Ultrathin hydrophobic films based on the metal organic framework UiO-66-COOH(Zr)

• Miguel A. Andrés,
• Clemence Sicard,
• Christian Serre,
• Olivier Roubeau and
• Ignacio Gascón

Beilstein J. Nanotechnol. 2019, 10, 654–665, doi:10.3762/bjnano.10.65

• previously done for Langmuir film fabrication of other materials [38][39][40]. However, although the suspension stability was clearly improved using a 1:4 THF/CHCl3 volume ratio, the reproducibility of the π–A isotherms was not favorable. This result motivated us to seek other means to improve the MOF sMPs

• wt % were tested. Due to the low MOF amounts used, a BA concentration of less than 5 wt % was insufficient for the formation of a BA Langmuir film. For higher BA concentrations, the normalized surface pressure/area isotherms showed lift-off at lower areas per MOF mass in comparison to the bare UiO-66

• (every run at each surfactant concentration was repeated twice). Brewster angle microscopy (BAM) images together with SEM inspection of preliminary Langmuir film transfers showed that the best results were obtained for the 0.05 mg MOF·mL−1 + 10 wt % ODP suspensions. Moreover, these suspensions led to the

An ellipsometric approach towards the description of inhomogeneous polymer-based Langmuir layers

• Falko O. Rottke,
• Burkhard Schulz,
• Klaus Richau,
• Karl Kratz and
• Andreas Lendlein

Beilstein J. Nanotechnol. 2016, 7, 1156–1165, doi:10.3762/bjnano.7.107

• inhomogeneities of polymer-based Langmuir layers, despite the peculiarities of the air–water interface. This is exemplified for polyester-based layers. Generally, the lower the lateral mobility of the investigated Langmuir film, the more accurate maps of the ellipsometric phase shift Δ can be obtained as a basis

Conformational switching of ethano-bridged Cu,H₂-bis-porphyrin induced by aromatic amines

• Simona Bettini,
• Emanuela Maglie,
• Rosanna Pagano,
• Victor Borovkov,
• Yoshihisa Inoue,
• Ludovico Valli and
• Gabriele Giancane

Beilstein J. Nanotechnol. 2015, 6, 2154–2160, doi:10.3762/bjnano.6.221

• in aqueous solution. The high selectivity of the SPR sensing device has been verified by checking the spectral response of the active layer towards other analytes dissolved in the aqueous solutions. Keywords: aromatic amines; bis-porphyrin; conformational switching; Langmuir film; surface plasmon

• interaction between the bis-porphyrin derivative and aromatic amines, amine sensing experiments have been carried out. A Langmuir film of Cu,H2-Por2 was repeatedly transferred by the LS method onto quartz substrates and the UV–vis spectra were recorded with each additional LS run (Figure 6). For all the LS

• films, the maximum absorption peak was the same and centered at 414 nm suggesting that the molecular conformation was not changed with the deposition process retaining essentially the closed syn-form as in the case of the floating Cu,H2-Por2 Langmuir film. The linear relationship between the number of

Electrical characterization of single molecule and Langmuir–Blodgett monomolecular films of a pyridine-terminated oligo(phenylene-ethynylene) derivative

• Henrry M. Osorio,
• Santiago Martín,
• María Carmen López,
• Santiago Marqués-González,
• Simon J. Higgins,
• Richard J. Nichols,
• Paul J. Low and
• Pilar Cea

Beilstein J. Nanotechnol. 2015, 6, 1145–1157, doi:10.3762/bjnano.6.116

• the dipole transition moment of the chromophore. This result is in agreement with a progressive reorientation of the molecules in the Langmuir film upon compression. Langmuir–Blodgett monomolecular films of 1 were obtained by the transference of Langmuir films onto solid substrates by the vertical

• substrate was recorded (Figure 6) in order to obtain additional information about the molecular arrangement of 1 in LB films. The spectrum exhibits a similar profile to the reflection spectrum of the Langmuir film at 16 mN·m−1, and is characterized by a maximum absorption feature at 335 nm and a broad band