title: Molecular Rods Based on Oligo-spiro-thioketals.
abstract: We report on an extension of the previously established concept of oligospiroketal (OSK) rods by replacing a part or all ketal moieties by thioketals leading to oligospirothioketal (OSTK) rods. In this way, some crucial problems arising from the reversible formation of ketals are circumvented. Furthermore, the stability of the rods toward hydrolysis is considerably improved. To successfully implement this concept, we first developed a number of new oligothiol building blocks and improved the synthetic accessibility of known oligothiols, respectively. Another advantage of thioacetals is that terephthalaldehyde (TAA) sleeves, which are too flexible in the case of acetals can be used in OSTK rods. The viability of the OSTK approach was demonstrated by the successful preparation of some OSTK rods with a length of some nanometers.
authors.affiliation: Institut für Chemie, Universität Potsdam , Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Wessig
authors.affiliation: Institut für Chemie, Universität Potsdam , Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Gerngroß
authors.affiliation: Institut für Chemie, Universität Potsdam , Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Freyse
authors.affiliation: Institut für Chemie, Universität Potsdam , Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Bruhns
authors.affiliation: Institut für Chemie, Universität Potsdam , Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Przezdziak
authors.affiliation: Institut für Chemie, Universität Potsdam , Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam, Germany.
authors.forename: U
authors.initials: U
authors.lastname: Schilde
authors.affiliation: Institut für Chemie, Universität Potsdam , Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Kelling