Observation of intermolecular N–I interaction during the growth of a 4-cyano-4′-iodobiphenyl molecular crystal on GeS(001)

Sumii, Ryohei; Sakamaki, Masako; Matsumoto, Yoshihiro; Amemiya, Kenta; Kanai, Kaname; Seki, Kazuhiko

doi:10.1016/j.susc.2010.03.020

Cited by 3 publications

(2 citation statements)

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“…However, any chemical shift effect associated with this relatively weak, long-range chlorine−nitrogen bonding is likely too small to be observable in any XPS measurement. 42 Overlayer thicknesses were calculated for the XPS samples as previously reported. 43 Si 2p signal attenuation (I s /I 0 ) has been used in this study to estimate the overlayer film thickness using the following relationship: where, t is the thickness of the overlayer, λ is the inelastic mean free path, θ is the takeoff angle (here 15°), I s is the substrate signal intensity after modification, and I 0 is the substrate signal intensity before modification.…”

Section: Resultsmentioning

confidence: 99%

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Solvent Induced Adhesion Interactions between Dichlorotriazine Films

et al. 2012

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This article reports adhesion interactions between siliconsupported dichlorotriazine films in various solvents. The formation, chemical composition, and thickness of the overlayer were analyzed by means of X-ray photoelectron spectroscopy (XPS). An atomic force microscopy (AFM) characterization was performed to evaluate the overlayer roughness. Adhesion interactions were measured using chemical force spectrometry (CFS). The purpose of the study is to understand the effect of solvents on the adhesion force between dichlorotriazine films. The tip−surface adhesion forces measured in octane and cyclooctane were found to be relatively weak. Use of solvents that may participate in π−π interactions, such as toluene and trifluoromethyl benzene, as well as a potential monohalogen bond donor, such as CCl 4 , did not lead to significant increase in the tip−surface forces. However, the adhesion forces increase considerably when measured in solvents that contain at least two ether groups, such as dioxane, diethylene glycol dimethyl ether, and triethylene glycol dimethyl ether. These most important interactions in ether-type solvents are due to bridging of the solvent between the two surfaces. Molecular dynamics simulations of the functionalized surfaces are consistent with enhanced solvent bridging interactions when the solvent contains ether functional groups.

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Section: Resultsmentioning

confidence: 99%

“…The dichlorotriazine moiety contains both chlorine and nitrogen atoms, so one can imagine that halogen bonding might take place in any 2D film. However, any chemical shift effect associated with this relatively weak, long-range chlorine–nitrogen bonding is likely too small to be observable in any XPS measurement …”

Section: Resultsmentioning

confidence: 99%