Ethylene-tetrafluoroethylene (ETFE) cotelomer iodides and their transformation to surface protection intermediates

Qiu, Weiming; Raghavanpillai, Anilkumar; Brown, Peter A.; Atkinson, Wayne R.; Vincent, Michael; Marshall, William J.

doi:10.1016/j.jfluchem.2014.10.004

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…Fluorinated n-alkane thiols on an Au(111) substrate show subtly different packing compared to n-alkane thiols, as shown by atomic force microscopy and grazing incidence XRD [29]. Significant melting point increases in fluorinated vs. non-fluorinated compounds have also been observed [30,31].…”

Section: Resultsmentioning

confidence: 98%

Short Fluoroalkanes Suppress a Thermally-Induced Phase Transition in a Layered Organic Crystal

Marjo,

Rich,

Bhadbhade

et al. 2023

Crystals

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Ensuring a consistent crystal structure over a wide temperature range can be desirable behaviour in organic devices. This study investigates a layered crystal system formed by hydrogen-bonded chloro-s-triazine rings functionalised with alkyl or fluoroalkyl chains between the layers. When substituted with N-propyl groups (C3), the crystal undergoes a thermally-induced phase transition where the chains are ordered and bent below 170 K and disordered and extended above 175 K. Replacement with fluorinated N-propyl chains (C3-F) produces the same layered crystal but successfully suppresses the phase transition. The hydrocarbon and fluorocarbon analogues were found to be incompatible and unable to form co-crystals from solution or with mechanical mixing. Both effects were ascribed to more attractive C-F…F-C and C-H…F-C interactions in the fluorinated analogue. Long perfluoroalkanes are well known for controlling assembly in the solid state, but this study suggests that short-chain fluoroalkanes can exert strong control over the assembly and stability of an organic crystal.

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Section: Resultsmentioning

confidence: 98%