Open AccessLayer-by-layer self-assembled multilayer films of sulfonated-β-cyclodextrin and its reversible adsorption of methyl orange
Author(s) -
Qi Yan,
Fangyu Pei,
Xiangmei Kong,
Junge Zhi
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/508/1/012153
Subject(s) - methyl orange , adsorption , covalent bond , aqueous solution , sulfonic acid , chemistry , salt (chemistry) , layer by layer , ionic bonding , cyclodextrin , polymer chemistry , orange (colour) , ethanol , layer (electronics) , chemical engineering , ion , organic chemistry , photocatalysis , food science , engineering , catalysis
Multilayer film based on photosensitive p -diphenyl diazonium salt (biPh-N 2+ ) and sulfonated- β -cyclodextrin (S- β -CD) were fabricated by layer-by-layer self-assembly. The ionic bonds formed between diazonium salt and sulfonic acid ion in the multilayer film converted to covalent bonds and formed stable ultra-thin film when the diazonium groups decomposed under UV light irradiation. Meanwhile, the concentration of S- β -CD aqueous solution can influence the self-assembled multilayer films, while the pH value (pH=3~9) had little effect on the self-assembled process except the strong alkaline solution (pH=11). Moreover, based on the electrostatic interactions of S- β -CD and MO to form a host-guest complexation, the multilayer film of (biPh-N 2+ /S- β -CD) 12 can absorb methyl orange (MO), and which can release reversibly in ethanol.