Self-assembled monolayers of bis-thioctic ester derivatives of oligoethyleneglycols: remarkable selectivity for K+/Na+ recognition

2000 ◽  
pp. 141-142 ◽  
Author(s):  
Krisanu Bandyopadhyay ◽  
Haiying Liu ◽  
Sheng-Gao Liu ◽  
Luis Echegoyen
Keyword(s):  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Derivatives Of

A Molecular Architectural Approach to Self-Assembled Monolayers as NLO Materials

1995 ◽  
Vol 413 ◽  
Author(s):  
Xiaoguang Yang ◽  
Laura Smilowitz ◽  
C. Thomas Buscher ◽  
Duncan McBranch ◽  
Jeanne Robinson ◽  
...  
Keyword(s):  
Molecular Orientation ◽  
Surface Coverage ◽  
Second Harmonic ◽  
Fused Silica ◽  
Nonlinear Susceptibility ◽  
Self Assembled Monolayers ◽  
Fundamental Wavelength ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Derivatives Of

ABSTRACTSelf-assembled molecular architechtures of nonlinear optical (NLO) chromophores and their super-chromophores are discussed. The chromophores are derivatives of azobenzene sulfonates and the super chromophores are derivatives of calix[4]stilbazole and calix[4]stilbazolium. The studies of azobenzene sulfonates are aimed at understanding the surface coverage and molecular orientation in polar self-assembled monolayers (SAMs). The optimized molecular orientation was found to be 32±3 degree and the maximum surface coverage is approximately 2–4 molecules per nm2 depending on the molecular cross-section. The calixarene chromophores are macrocyclic compounds consisting of four simple D-π-A units bridged by methylene groups. These molecules were synthesized such that four D-π-A units of the calix[4]arene were aligned along the same direction with the calixarene in a cone conformation. Both simple and super-chromophores were subsequently fabricated into covalently bound selfassembled monolayers on the surfaces of fused silica and silicon. Spectroscopic second harmonic generation (SHG) measurements were carried out to determine the absolute value of the dominant element of the second-order nonlinear susceptibility, d33 = 60 pm/V at a fundamental wavelength of 890 nm. Furthermore, SHG imaging was employed to investigate the pattemed SAMs of NLO super chromophores.

Characterization of Self-Assembled Monolayers of Oligo(phenyleneethynylene) Derivatives of Varying Shapes on Gold:  Effect of Laterally Extended π-Systems

Langmuir ◽  
2007 ◽  
Vol 23 (11) ◽  
pp. 6170-6181 ◽  
Author(s):  
Daniel Nilsson ◽  
Somsakul Watcharinyanon ◽  
Mattias Eng ◽  
Liqian Li ◽  
Ellen Moons ◽  
...  
Keyword(s):  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Derivatives Of

Porphyrin self-assembled monolayers and photodynamic oxidation of tryptophan

2010 ◽  
Vol 14 (01) ◽  
pp. 81-88 ◽  
Author(s):  
Isabelle Chambrier ◽  
David A. Russell ◽  
Derek E. Brundish ◽  
William G. Love ◽  
Giulio Jori ◽  
...  
Keyword(s):  
Human Serum Albumin ◽  
Fluorescence Spectroscopy ◽  
Serum Albumin ◽  
White Light ◽  
Self Assembled Monolayers ◽  
Self Assembled Monolayer ◽  
Glass Substrates ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Derivatives Of

The zinc and magnesium metalated derivatives of 5,5′-[12,12′-di(thiododecyloxy)-4,4′-phenyl)]-10,10′,15,15′,20,20′-hexakis(3,3′,4,4′,5,5′-hexakisdecyloxyphenyl)diporphyrin, 1b and 1c, have been synthesised and deposited to form self-assembled monolayer (SAM) films on the surface of gold-coated glass substrates. The SAM films have been characterized by RAIR spectroscopy and fluorescence spectroscopy. The potential for the porphyrin films to catalyze the oxidation of tryptophan within human serum albumin upon irradiation with white light has been demonstrated and attributed to the porphyrins acting as photosensitizers of oxygen to form oxidizing species.

Evanescent wave excitation of palladium metalated porphyrins as self-assembled monolayers and phosphorescence quenching by oxygen

2012 ◽  
Vol 16 (11) ◽  
pp. 1186-1195 ◽  
Author(s):  
Zhenxin Wang ◽  
Shaya Y. Al-Raqa ◽  
Isabelle Chambrier ◽  
David A. Russell ◽  
Michael J. Cook
Keyword(s):  
Luminescence Spectroscopy ◽  
Self Assembled Monolayers ◽  
The Novel ◽  
Self Assembled Monolayer ◽  
Phosphorescence Quenching ◽  
Glass Slides ◽  
Assembled Monolayers ◽  
Phosphorescence Emission ◽  
Self Assembled ◽  
Derivatives Of

The novel palladium metalated derivatives of 5,5′-[8,8′-di(thiooctyloxy)-4,4′-phenyl)]-10,10′,15,15′,20,20′-hexakis(4,4′-t-butylphenyl)diporphyrin and 5,5′-[8,8′-di(thiooctyloxy)-4,4′-phenyl)]- 10,10′,15,15′,20,20′-hexakis(3,3′,4,4′,5,5′-hexakisdecyloxyphenyl)diporphyrin, 1 and 2 respectively, have been synthesized and deposited to form self-assembled monolayer (SAM) films on gold-coated glass slides that served as substrates. The SAM films have been characterised by RAIR spectroscopy. Excitation of the molecules within the films has been achieved using the evanescent field arising when the glass substrate was used as a waveguide. Luminescence spectroscopy detected both fluorescence and phosphorescence emission from the SAM films under an argon atmosphere. Quenching of the phosphorescence emission by dioxygen was investigated for both films. Greater reproducibility of data was achieved from the SAM films of compound 2. The phosphorescence quenching from these films followed the Stern–Volmer relationship.

Electrochemical behavior of self-assembled monolayers based on functionalized oligothiophenes

1998 ◽  
Vol 95 (6) ◽  
pp. 1339-1342 ◽  
Author(s):  
R. Michalitsch ◽  
A. El Kassmi ◽  
P. Lang ◽  
A. Yassar ◽  
F. Garnier
Keyword(s):  
Electrochemical Behavior ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

Imaging of patterned self-assembled monolayers by scanning photoelectron microscopy

2003 ◽  
Vol 104 ◽  
pp. 459-462 ◽  
Author(s):  
R. Klauser ◽  
M. Zharnikov ◽  
I.-H. Hong ◽  
S.-C. Wang ◽  
A. Gölzhäuser ◽  
...  
Keyword(s):  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Scanning Photoelectron Microscopy ◽  
Self Assembled
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