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Thermal behaviour of bambus[6]uril and its chloride caviplex

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Abstract

The present paper presents the thermal behaviour of methyl-bambus[6]uril in its anion-free and chlorine-included form. Our study was based on thermogravimetry associated to Fourier-transform infrared spectroscopy and differential scanning calorimetry. The compounds decompose after \(300\,^{\circ }\hbox {C}\) and both forms of this macrocycle, contain four hydration water molecules. The main decomposition products are \(\hbox {H}_2\hbox {O}\), \(\hbox {CO}_2\), \(\hbox {NH}_3\) and isocyanic acid as we could detect by FTIR spectroscopy. Finally, we verified that the caviplex loses its chloride ion after \(270\ ^{\circ }\hbox {C}\) and may produce the anion-free macrocyle upon heating.

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Notes

  1. See ESI Figs. S1 and S2.

  2. See ESI Figs. S3 to S4.

  3. See ESI Table S1.

  4. See ESI Figs. S5 and S6.

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Acknowledgements

This work was financed by FAPESP proc. 2016-12666-1, 2017-19595-5 and CAPES, CNPq proc. 457264/2014-4, 134552/2015-6 and 176793/2017-5. We thank Bill Safadi and Prof. Koiti Araki from IQ-USP for elemental analyses.

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Authors and Affiliations

  1. Departamento de Química, F.F.C.L.R.P, Universidade de São Paulo, Av. Bandeirantes 3900, CEP 14040-901, Ribeirão Preto, S.P., Brazil

    Renato Salviato Cicolani, Henrique Dias Correia & Grégoire Jean-François Demets

  2. Faculdade de Ciências e Tecnologia de Presidente Prudente, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Roberto Simonsen, 305 Centro Educacional, 19060-900, Presidente Prudente, S.P., Brazil

    Aldo Eloizo Job

  3. Faculdade de Zootecnia e Engenharia de Alimentos, Universidade de São Paulo, Av. Duque de Caxias Norte, 225 Campus Fernando Costa, CEP 13635-900, Pirassununga, S.P., Brazil

    Fernando Gustavo Tonin

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  1. Renato Salviato Cicolani
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  2. Aldo Eloizo Job
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  3. Fernando Gustavo Tonin
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  4. Henrique Dias Correia
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  5. Grégoire Jean-François Demets
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Correspondence to Grégoire Jean-François Demets.

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Cicolani, R.S., Job, A.E., Tonin, F.G. et al. Thermal behaviour of bambus[6]uril and its chloride caviplex. J Therm Anal Calorim 136, 1195–1199 (2019). https://doi.org/10.1007/s10973-018-7755-0

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