title: 5-(2-Mercaptoethyl)-1H-tetrazole: Facile Synthesis and Application for the Preparation of Water Soluble Nanocrystals and Their Gels.
abstract: A facile method for the preparation of the novel capping ligand 5-(2-mercaptoethyl)-1H-tetrazole for the stabilization of water-soluble nanocrystals was developed. This effective synthetic procedure is based on the cycloaddition of sodium azide to 3,3'-dithiobis(propionitrile) followed by the reductive cleavage of a S-S bond with triphenylphosphine. The structure of the synthesized compound was confirmed by single-crystal X-ray analysis. A target tetrazole was successfully applied for the direct aqueous synthesis of CdTe and Au nanocrystals. CdTe nanocrystals capped with 5-(2-mercaptoethyl)-1H-tetrazole were found to reveal high photoluminescence efficiencies (up to 77 %). Nanocrystals capped with this tetrazole ligand are able to build 3D structures in a metal-ion-assisted gelation process in aqueous solution. Critical point drying of the as-formed hydrogels allowed the preparation of the corresponding aerogels, while preserving the mesoporous structure.
authors.affiliation: Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya 14, Minsk, 220006, Belarus. azole@tut.by.
authors.forename: Sergei V
authors.identifier: http://orcid.org/0000-0002-7015-5062
authors.initials: SV
authors.lastname: Voitekhovich
authors.affiliation: Physical Chemistry, TU Dresden, Bergstr. 66b, 01062, Dresden, Germany.
authors.forename: André
authors.initials: A
authors.lastname: Wolf
authors.affiliation: Physical Chemistry, TU Dresden, Bergstr. 66b, 01062, Dresden, Germany.
authors.forename: Chris
authors.initials: C
authors.lastname: Guhrenz
authors.affiliation: Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya 14, Minsk, 220006, Belarus.
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Lyakhov
authors.affiliation: Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya 14, Minsk, 220006, Belarus.
authors.forename: Ludmila S
authors.initials: LS
authors.lastname: Ivashkevich
authors.affiliation: Inorganic Chemistry, TU Dresden, Bergstr. 66, 01062, Dresden, Germany.
authors.forename: Marion
authors.initials: M
authors.lastname: Adam
authors.affiliation: Physical Chemistry, TU Dresden, Bergstr. 66b, 01062, Dresden, Germany.
authors.forename: Nikolai
authors.initials: N
authors.lastname: Gaponik
authors.affiliation: Inorganic Chemistry, TU Dresden, Bergstr. 66, 01062, Dresden, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Kaskel
authors.affiliation: Physical Chemistry, TU Dresden, Bergstr. 66b, 01062, Dresden, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Eychmüller
keywords: gels; nanocrystals; nitrogen heterocycles; porous materials; quantum dots