Steering polymer growth by molding nanochannels: 1,5-hexadiene polymerization in high silica mordenite

Year: 2021

Authors: Fabbiani M., Confalonieri G., Morandi S., Arletti R., Quartieri S., Santoro M., Di Renzo F., Haines J., Fantini R., Tabacchi G., Fois E., Vezzalini G., Ricchiardi G., Martra G.

Autors Affiliation: Univ Torino, Dept Chem, Via Pietro Giuria 7, I-10125 Turin, Italy; Univ Torino, Interdept Ctr Nanostruct Interfaces & Surfaces NI, Via Pietro Giuria 7, I-10125 Turin, Italy; Univ Modena & Reggio Emilia, Dept Chem & Geol Sci, Via Campi 103, I-41125 Modena, Italy; Natl Inst Opt CNR INO, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy; European Lab Non Linear Spect LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy; Univ Montpellier, CNRS, ICGM, ENSCM, Pl Eugene Bataillon, F-34095 Montpellier, France; Univ Insubria, Dept Sci & High Technol, Via Valleggio 9, I-22100 Como, Italy; Univ Insubria, INSTM, Via Valleggio 9, I-22100 Como, Italy.

Abstract: Zeolites are known as scaffolds for the assembly of molecules via non-covalent interactions yielding organized supramolecular materials. Yet their potential in driving the growth of low-dimensional systems requiring covalent bond formation is still unexplored. We incorporated 1,5-hexadiene in the channels of a high-silica mordenite and analyzed the material by infrared spectroscopy, X-ray powder diffraction, thermogravimetry and modeling techniques. Due to the few zeolite acid sites, 1,5-hexadiene experiences a slow conversion to a polymer mainly formed by cyclopentane units and featuring short side chains that are able to fit the channels. The shape-directing abilities of zeolite frameworks play a two-fold role, involving first the organization of the monomers inside the void-space and then the linear growth of the chain dictated by the channel geometry. These findings highlight the molding action of zeolites in directing transformations of covalent bonds under ambient conditions and may provide insights for obtaining confined polymers with intriguing prospective applications.

Journal/Review: MICROPOROUS AND MESOPOROUS MATERIALS

Volume: 311      Pages from: 110728-1  to: 110728-8

More Information: This work was carried out in the framework of the PRIN project ZAPPING (PRIN2015 Prot.2015HK93L7) funded by the Italian MIUR. FAR2018 Uninsubria is acknowledged for funding.
KeyWords: Zeolite; Polymerization; Nanostructure; Density functional calculation; X-ray diffraction
DOI: 10.1016/j.micromeso.2020.110728

Citations: 7
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