10.1002/anie.201904898
Angewandte Chemie International Edition
COMMUNICATION
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network plays two roles. First, the templating effect results in
some of the by-products being anchored to the materials,
resulting in a lowered production of volatile contaminants.[10]
Second, the remaining volatile contaminants can be captured
more efficiently onto the polymer matrix. Washing of the spent
material with solvent did not lead to the recovery of any small
molecular product (see SI, part 12).
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To conclude, we have shown that the dehydrogenation
temperature of hydrogen-rich amine-boranes can be controlled
by their insertions into a polymer matrix, and not by modifying
the electronics or sterics of the Lewis pair. This was achieved by
embedding the amine-boranes into polymers. The boron-
containing monomer ratio controls the density of the DHBs that
are at the root of the release of dihydrogen. The polymeric
nature of the material affects how easily DHBs can be
established. We also evidenced that the Boron-polymer with the
highest boron content enables the easy and clean
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a
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Acknowledgements
We thank CNRS, CPE Lyon, Université Claude Bernard Lyon 1
and ANR (grant NHCX) for funding of this work. A. L. and J. B.
thank UCBL for a Ph. D. stipend. We are grateful to D. Gajan
(CNRS, CRMN) and M. Humbert (C2P2) for help with the solid-
state NMR characterization, as well as to M. Taam (C2P2) for
SEC characterization.
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Keywords: Boron • Polymers • Boranes • Lewis pairs •
Dehydrogenation
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[10] Pictures of the materials and of borazane before and after
dehydrogenation can be found in the SI (see visuals). One can clearly
see that, as opposed to our materials, borazane catastrophically
expands by foaming upon thermal dehydrogenation.
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