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Langmuir and Langmuir–Blodgett Films from Amphiphilic Pillar[5]arene‐Containing [2]Rotaxanes
Author(s) -
Trinh Thi Minh Nguyet,
Nierengarten Iwona,
Holler Michel,
Gallani JeanLouis,
Nierengarten JeanFrançois
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201501124
Subject(s) - rotaxane , amphiphile , pillar , langmuir–blodgett film , alkyl , crystallography , langmuir , chemistry , materials science , polymer chemistry , stereochemistry , molecule , crystal structure , supramolecular chemistry , organic chemistry , polymer , copolymer , adsorption , structural engineering , engineering
Amphiphilic pillar[5]arene‐containing [2]rotaxanes have been prepared and fully characterized. In the particular case of the [2]rotaxane incorporating a 1,4‐diethoxypillar[5]arene subunit, the structure of the compound was confirmed by X‐ray crystal structure analysis. Owing to a good hydrophilic/hydrophobic balance, stable Langmuir films have been obtained for these rotaxanes and the size of the peripheral alkyl chains on the pillar[5]arene subunit has a dramatic influence on the reversibility during compression–decompression cycles. Indeed, when these are small enough, molecular reorganization of the rotaxane by gliding motions are capable of preventing strong π–π interactions between neighboring macrocycles in the thin film.