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Mechanistic Insights into the Self-Assembly of an Acid-Sensitive Photoresponsive Supramolecular Polymer.
Kartha, Kalathil K; Allampally, Naveen Kumar; Yagai, Shiki; Albuquerque, Rodrigo Q; Fernández, Gustavo.
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  • Kartha KK; Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany.
  • Allampally NK; Institut für Organische Chemie, Universität Würzburg, am Hubland, 97074, Würzburg, Germany.
  • Yagai S; Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33-Yayoi-cho, Inage-Ku, Chiba, 263-8522, Japan.
  • Albuquerque RQ; Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany.
  • Fernández G; Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany.
Chemistry ; 25(39): 9230-9236, 2019 Jul 11.
Article en En | MEDLINE | ID: mdl-30937962
The supramolecular polymerization of an acid-sensitive pyridyl-based ligand (L1 ) bearing a photoresponsive azobenzene moiety was elucidated by mechanistic studies. Addition of trifluoroacetic acid (TFA) led to the transformation of the antiparallel H-bonded fibers of L1 in methylcyclohexane into superhelical braid-like fibers stabilized by H-bonding of parallel-stacked monomer units. Interestingly, L1 dimers held together by unconventional pyridine-TFA N⋅⋅⋅H⋅⋅⋅O bridges represent the main structural elements of the assembly. UV-light irradiation caused a strain-driven disassembly and subsequent aggregate reconstruction, which ultimately led to short fibers. The results allowed to understand the mechanism of mutual influence of acid and light stimuli on supramolecular polymerization processes, thus opening up new possibilities to design advanced stimuli-triggered supramolecular systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2019 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2019 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania