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New Journal of Chemistry
Page 5 of 7
DOI: 10.1039/C8NJ01784K
Journal Name
ARTICLE
Boyarskikh, J. Bacsa, D. G. Musaev, H. M. L. Davies, Nature,
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To sum up, MOA-Rh-2-catalyzed hydrosilylation of aldehydes or
ketones displays two major advantages compared to the reported
catalytic protocols, i.e., the low catalyst load (0.1-0.4 mol%) and
easy operation under atmospheric environment (without protection
under inert gas during the whole operation from the catalyst
preparation to the catalytic test) due to its high air and moisture
stability. To the best of our knowledge, few catalysts for this
reaction can be handled under air.22b,c,26a Furthermore, MOA-Rh-2 is
really heterogeneous catalyst, the Rh leaching to the reaction
solution is 0.8% through the inductively coupled plasma optical
emission spectrometry (ICP-OES) analysis. MOA-Rh-2 can be
recycled and reused for five runs without significant loss of the
reactivity, and the conversions are in the range of 89-99% (Figure 3).
Unfortunately, in the sixth run, the conversion decreases to 56%.
The XPS analysis of the recycled MOA-Rh-2 discloses that the
valence of Rh is still +2 (Figure S3).
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K. Takeda, T. Oohara, M. Anada, H. Nambu, S. Hashimoto,
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ChemistrySelect, 2016, , 2571-2575.
2
1
12 Y. Kataoka, K. S. Kataoka, H. Murata, M. Handa, W. Mori, T.
Kawamoto, Inorg. Chem. Commun., 2016, 68, 37-41.
13 J. Liu, C. Fasel, P. Brage-Groszewicz, N. Rothermel, A. S. L.
Thankamony, G. Sauer, Y. Xu, T. Gutmann, G. Buntkowsky,
Catal. Sci. Technol., 2016,
14 (a) L. Chen, T. Yang, H. Cui, T. Cai, L. Zhang, C.-Y. Su, J. Mater.
Chem. A, 2015, , 20201-20209; (b) B. Zhu, G. Liu, L. Chen, L.
Qiu, L. Chen, J. Zhang, L. Zhang, M. Barboiu, R. Si, C.-Y. Su,
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6, 7830-7840.
Conclusions
3
In summary, a new type of mesoporous metal-organic aerogel
based on dirhodium paddle-wheels (MOA-Rh-2) with the pore
3
Cui, L. Zhang, C.-Y. Su, Chin. J. Chem., 2017, 35, 964-968.
15 (a) J. Liu, L. Chen, H. Cui, J. Zhang, L. Zhang, C.-Y. Su, Chem.
Soc. Rev., 2014, 43, 6011-6061; (b) J. Zhang, C.-Y. Su, Coord.
Chem. Rev., 2013, 257, 1373-1408; (c) X. Liang, L. Chen, L.
Zhang, C.-Y. Su, Chin. Sci. Bull., 2018, 63, 248-265; (d) A.
size around 3.5 nm has been successfully synthesized and
applied in the hydrosilylation reactions of aldehydes and
ketones. Importantly, the air and moisture-stable aerogel can
promote the reaction open to air, which is prior to the
previously reported catalysts, which have been synthesized in
harsh conditions and used in strict anhydrous and anaerobic
conditions. Furthermore, the high stability of the aerogel in
Corma, H. Garcı´a, F. X. L Xamena, Chem. Rev. 2010, 110
4606-4655.
,
16 J.-D. Yi, R. Xu, Q. Wu, T. Zhang, K.-T. Zang, J. Luo, Y.-L. Liang,
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17 (a) S. Verma, R. B. N. Baig, M. N. Nadagouda, R. S. Varma,
3
most of the organic solvents helps MOA-Rh-2 behave as a truly
heterogeneous catalyst. Further study on the design, synthesis
and catalytic applications of metal-organic aerogels based on
dirhodium paddle-wheels is in progress.
Green. Chem., 2016, 18, 4855-4858; (b) S. Verma, R. B. N.
Baig, M. N. Nadagouda, R. S. Varma, Sci. Rep., 2017, 7, 655;
(c) S. Verma, R. B. N. Baig, M. N. Nadagouda, R. S. Varma,
Tetrahedron, 2017, 73, 5577-5580.
18 (a) S. Li, L. Zhang, B. Lu, E. Yan, T. Wang, L. Li, J. Wang, Y. Yu,
Q. Mu, New J. Chem., 2018, 42, 7247-7253; (b) B.-W. Cong,
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Chem., 2018, 42, 4596-4602; (c) Y. Han, C. Bai, L. Zhang, J.
Wu, H. Meng, J. Xu, Y. Xu, Z. Liang, X. Zhang, New J. Chem.,
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Emrani, New J. Chem., 2018, 42, 988-994.
Conflicts of interest
There are no conflicts to declare.
Acknowledgements
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,
This work was supported by the National Natural Science
Foundation of China (21773314, 21720102007), Natural
Science Foundation of Guangdong Province (S2013030013474)
and the Fundamental Research Funds for the Central
Universities (16lgjc68, 17lgjc12).
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