Self-assembled monolayers of azobenzene functionalized 1,3,5-triazine-4,6-dithiols

Muzikante, I.; Gerca, L.; Fonavs, E.; Rutkis, Mārtiņš; Gustina, Daina; Markava, E.; Stiller, Burkhard; Brehmer, L.; Knochenhauer, Gerald

doi:10.1016/s0928-4931(02)00220-5

Cited by 16 publications

(11 citation statements)

References 13 publications

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“…1). [5,21] This change of dipole moment can be determined as a variation of the surface potential in well-ordered SAMs. [21][22][23][24] As 4-hydroxyazobenzenes are easily accessible via azocoupling, [25] almost exclusively alkoxy-azobenzene derivatives have been attached to surfaces.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Azobenzenealkanethiols for Self-Assembled Monolayers with Photoswitchable Properties

Krakert¹,

Terfort²

2010

Aust. J. Chem.

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A series of azobenzenealkanethiol compounds with the structure p-RC 6 H 4 N=NC 6 H 4 (CH 2 ) n SH (n = 3, 4) was synthesized using a divergent strategy with the two anilines H 2 NC 6 H 4 (CH 2 ) n SAc as central compounds. This strategy provides fast access to a broad variety of the respective azobenzenethiols without (note!) an oxygen atom in the alkyl chain, thus permitting the self-assembly of these compounds onto gold in a predictable conformation, also taking advantage of the previously found odd-even effect in aromatic-aliphatic hybrid systems. Initial experiments indicate that all of these molecules indeed form dense monolayers, in which the orientation of the azobenzene unit is determined by the number of methylene groups in the aliphatic part of the molecules.

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Section: Introductionmentioning

confidence: 99%

Preparation of Azobenzenealkanethiols for Self-Assembled Monolayers with Photoswitchable Properties

Krakert¹,

Terfort²

2010

Aust. J. Chem.

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“…The Kelvin probe is an extremely multipurpose and widely applied analytical tool for measuring the surface potential of organic films [9], particularly for investigation of changes of the surface potential on irradiation [10]. In the Kelvin probe method, a top planar electrode is vibrating up and down (60Hz) just above the surface (see Fig.3).…”

Section: Investigation Of Surface Potentialmentioning

confidence: 99%

Light induced processes in thin films of indandione type organic molecules

et al. 2007

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The optically induced switching of material properties is important for investigations of opto-electronic effects and optomechanical properties. Investigated organic materials contain chromophore dipole consisting of acceptor and donor groups bridged by a delocalized π-electron system. Both calculations and experimental data show a reversible highly dipolar photoinduced intra molecular charge transfer in indandione type molecules (DMABI) accompanied by change of the sign and the value of the dipole moment. Investigations of optical properties of thin host-guest polymer films show that the photoinduced process of DMABI is related to the photoinduced switching between two equally stable states of the molecule. In this work first results of formation of the surface relief in polymer films incorporated with DMABI derivatives will be presented. The refractive index gratings of DMABI host-guest films show that red light is less diffracted than blue one. The reversible surface potential changes on irradiation in photoinduced intramolecular electron transfer band in polymer host-guest films is observed. The DMABI molecules in solid state have nonlinear optical properties, which can be used and investigated in host-guest polymer matrix. The influence of concentration of DMABI molecules on photoinduced processes is discussed.

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“…3). The measurements of the surface potential in our studies were done either by Besocke Delta PHI GmbH/ Kelvin control equipment [23] or by computer-controlled home-made equipment [24] using the Kelvin Probe technique the resolution of measuring values being better than 1 mV.…”

Section: Studies Of the Surface Potentialmentioning

confidence: 99%