Reversible end-to-end assembly of selectively functionalized gold nanorods by light-responsive arylazopyrazole-cyclodextrin interaction.
cyclodextrins
gold nanorods
host–guest chemistry
light-responsive materials
molecular switches
self-assembly
Journal
Beilstein journal of organic chemistry
ISSN: 1860-5397
Titre abrégé: Beilstein J Org Chem
Pays: Germany
ID NLM: 101250746
Informations de publication
Date de publication:
2019
2019
Historique:
received:
15
03
2019
accepted:
12
06
2019
entrez:
12
7
2019
pubmed:
12
7
2019
medline:
12
7
2019
Statut:
epublish
Résumé
We propose a two-step ligand exchange for the selective end-functionalization of gold nanorods (AuNR) by thiolated cyclodextrin (CD) host molecules. As a result of the complete removal of the precursor capping agent cetyltrimethylammonium bromide (CTAB) by a tetraethylene glycol derivative, competitive binding to the host cavity was prevented, and reversible, light-responsive assembly and disassembly of the AuNR could be induced by host-guest interaction of CD on the nanorods and a photoswitchable arylazopyrazole cross-linker in aqueous solution. The end-to-end assembly of AuNR could be effectively controlled by irradiation with UV and visible light, respectively, over four cycles. By the introduction of AAP, previous disassembly limitations based on the photostationary states of azobenzenes could be solved. The combination photoresponsive interaction and selectively end-functionalized nanoparticles shows significant potential in the reversible self-assembly of inorganic-organic hybrid nanomaterials.
Identifiants
pubmed: 31293690
doi: 10.3762/bjoc.15.140
pmc: PMC6604721
doi:
Types de publication
Journal Article
Langues
eng
Pagination
1407-1415Références
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