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Table 2. Catalytic performance of LZU-OFe in alcoholysis of different
Chinese Academy of Sciences (XDB36000000, Z.Y.T.), National Key
Basic Research Program of China (2016YFA0200700, Z.Y.T.), National
Natural Science Foundation of China (21890381 and 21721002, Z.Y.T.),
Frontier Science Key Project of Chinese Academy of Sciences (QYZDJ-
SSW-SLH038, Z.Y.T.), and K.C. Wong Education Foundation (Z.Y.T.).
substituted epoxides.
Entrya)
TOF [h−1
]
Epoxide
Alcohol
CH3OH
Product
Yield [%]
1
>99
39
2
3
CH3OH
CH3OH
94
95
36
37
Conflict of Interest
The authors declare no conflict of interest.
4
EtOH
EtOH
92
73
34
28
Keywords
catalysis, covalent organic frameworks (COFs), defects, ligand exchange
5
Received: March 27, 2020
Revised: April 15, 2020
Published online:
a)Reaction conditions: 0.2 mmol epoxide, 5.0 mL CH3OH or CH3CH2OH, reaction
temperature 60 °C, 20 mg catalyst, reaction time 1 h.
extraction in THF for 24 h. The final purified LZU was obtained as a
yellow powder.
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Synthesis of LZU-OH: LZU-OH was prepared using the SALE method.
In a typical synthesis of LZU-OH, purified LZU (21.6 mg, 0.24 mmol)
was dispersed into a 15 mL glass vial with 3 mL anhydrous methanol.
Protocatechualdehyde (132.8 mg, 0.96 mmol, 4 equiv) was then added
into the precursor, to which 0.6 mL distilled water and 0.9 mL acetic acid
were added. The resulting suspension was then sealed and transferred
to an oven at 70 °C and left undisturbed for 3 days. The resulting COFs
solid was isolated by centrifugation and washed with DMF and methanol.
Further purification of LZU-OH was carried out by Soxhlet extraction in
THF for 24 h. The final purified LZU-OH was obtained as a brown powder.
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3
+
2+
4+
Synthesis of LZU-OM (M = Fe , Mn , V ): LZU-OM was prepared
through a simple treatment of LZU-OH with metal ions. In a typical
synthesis of LZU-OFe, 20 mg purified LZU-OH was dispersed into 5 mL
anhydrous methanol. Fe(acac)3 (1.6 mg, 0.006 mmol) was dispersed
into 5 mL anhydrous methanol in advance. The methanol solution
of Fe(acac)3 was added dropwise to the COFs solution followed by
incubation at room temperature for 3 h. The final product was isolated
by centrifugation and washed with DMF and methanol and dried
at 50 °C under vacuum overnight. The LZU-OFe was obtained as a
dark red powder. The synthesis procedure of LZU-OMn and LZU-OV
was similar with LZU-OFe except for replacement of Fe(acac)3 with
Mn(CH COO) ·4H O and VO(acac) .
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3
2
2
2
Catalytic Activity Test of LZU-OFe in Alcoholysis of Expoxides: In a typical
run of catalytic activity test of LZU-OFe, styrene oxide (0.2 mmol) and
LZU-OFe (20 mg) were added to 5.0 mL of methanol and sealed. The
reaction was stirred at a specific temperature for a desired period of time,
then centrifuged to remove the precipitate. The corresponding products
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area of related chemicals. In the recycle test, the catalyst was washed with
methanol three times, dried and then used without further treatment.
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Supporting Information
Supporting Information is available from the Wiley Online Library or
from the author.
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Acknowledgements
A. Hartschuh, F. Auras, T. Bein, J. Am. Chem. Soc. 2016, 138, 1234.
Y.S. and X.Z. contributed equally to this work. The authors acknowledge
financial support from the Strategic Priority Research Program of
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