title: The morphology transformation from helical nanofiber to helical nanotube in a diarylethene self-assembly system.
abstract: A helical nanostructure can be obtained by self-assembly of a diarylethene derivative that bears two malononitrile substitutes in a tetrahydrofuran/water medium. It is revealed that the helical nanostructure changed from helical nanofiber to helical nanotube when the diarylethene monomer changed from the open-ring isomer to the closed-ring isomer upon irradiation with 365 nm ultraviolet light, meanwhile, the helix angle of the nanostructure changed from 50° ± 5° to 75° ± 5°. There is a great possibility that the helical nanofibers and helical nanotubes are assembled from dimers as base units based on theoretical calculation and experimental results.
authors.affiliation: Qingdao Key Lab of Solar Energy Utilization and Energy Storage Technology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China. cuigl@qibebt.ac.cn yaols@qibebt.ac.cn.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Duan
authors.forename: Shihai
authors.initials: S
authors.lastname: Yan
authors.forename: Xinhong
authors.initials: X
authors.lastname: Zhou
authors.forename: Wei
authors.initials: W
authors.lastname: Xu
authors.forename: Hongxia
authors.initials: H
authors.lastname: Xu
authors.forename: Zhihong
authors.initials: Z
authors.lastname: Liu
authors.forename: Lixue
authors.initials: L
authors.lastname: Zhang
authors.forename: Chuanjian
authors.initials: C
authors.lastname: Zhang
authors.forename: Guanglei
authors.initials: G
authors.lastname: Cui
authors.forename: Lishan
authors.initials: L
authors.lastname: Yao
mesh_terms: D005030:Ethylenes / Q000737:chemistry*; D005663:Furans / Q000737:chemistry; D007536:Isomerism; D057139:Nanofibers / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D009570:Nitriles / Q000737:chemistry; D013696:Temperature; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry
chemical_list: D005030:Ethylenes; D005663:Furans; D009570:Nitriles; D014867:Water; C018674:tetrahydrofuran; C000945:dicyanmethane