10.1002/asia.202000621
Chemistry - An Asian Journal
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0.8H), 4.08 (s, 2.1H), 3.50-3.47 (m, 2.1H), 2.94-2.91 (m, 2.4H), 1.71 (s,
2.8H), 1.54-1.17(m, 7.6H), 0.92 (s, 1.7H).
Acknowledgements
This work was supported by the funding of the National Natural
Science Foundation of China (21901206/51973119), Joint
Foundation of Shaanxi Province Natural Science Basic
Research Program and Shaanxi Coal Chemical Group Co., Ltd.
(2019JLM-46) and Polymer Electromagnetic Functional
Materials Innovation Team of Shaanxi Sanqin Scholars.
Characterization data for hb-PEEa-2 synthesized through the
polymerization A2b and B3 monomers. IR (KBr, v, cm−1): 3253.33,
2968.67, 2113.11, 1697.78, 1602.89, 1448.89, 1349.33, 1224.89,
1142.44, 1004.00. 1H NMR (400 MHz, CDCl3) δ 7.40-7.29 (m, 1.0H),
4.73 (d, 1.0H), 4.21 (s, 1.4H), 4.09 (s, 2.0H), 3.31 (s, 4.0H), 2.95-2.92 (m,
0.7H), 1.80 (s, 0.6H), 1.58-1.51 (m, 1.1H), 1.28 (s, 0.5H), 0.95-0.88 (m,
2.0H).
Modification of hb-PEEa by amino-yne reaction. A solution of amine
compound (n-butylamine (7.3 mg) or diethyamine (7.3 mg) or NH2-PEG
(polyethylene glycolmonomethyl ether, Mn = 2000 g mol-1, 200 mg) in 2
Conflict of interest
mL THF was added dropwise to a solution of hb-PEEa-1 (50 mg, Mn
=
8940 g mol-1, PDI = 2.88) or hb-PEEa-2 (38 mg, Mn = 5080 g mol-1, PDI =
3.02) in THF (4 mL). The mixture was stirred under dry nitrogen at room
temperature for 12 h, and then added dropwise into hexane. The
precipitate was collected by filtration and dried at room temperature
under vacuum.
The authors declare no competing financial interest.
Keywords: hyperbranched polymers • amino-yne click reaction •
nanocatalyst • reduction reaction
Preparation of AuNPs@ PEG-hb-PEEa. AuNPs@PEG-hb-PEEa was
synthesized by mixing PEG-hb-PEEa-1 (10 mg, Mn = 78670 g mol-1) or
PEG-hb-PEEa-2 (10 mg, Mn = 30430 g mol-1) and HAuCl4•3H2O (3 mg,
0.008 mmol) in deionized water (10 mL) under vigorous stirring for 1h.
Then a freshly-prepared NaBH4 (40 mg in 2 mL water) aqueous solution
was added dropwise into the as-prepared solution. The obtained solution
was continuously stirred for another 2 h. The AuNPs@PEG-hb-PEEa
was purified by dialysis against a large volume of water (3 × 100 mL).
The AuNPs@PEG-hb-PEEa was collected by freeze-drying.
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Supporting Information
Supporting Information is available from the Online Library or
from the author.
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