Electronic Supplementary Informations (ESI):
Facile synthesis of covalent organic frameworks COF-1
and COF-5 by sonochemical method
Seung-Tae Yang, Jun Kim, Hye-Young Cho, Sangho Kim, and Wha-Seung Ahn
*
Experiemntal details
1. Synthesis of COF-1
COF-1 was prepared using 250 mg of 1,4-benzene diboronic acid (BDBA, Aldrich) in 40 mL
of a 1:1 v:v solution mixture of mesitylene (Aldrich) and 1,4-dioxane (Aldrich). The substrate
mixture was introduced to a custom-made horn type Pyrex reactor, which was then fitted to a
sonicator unit (VCX500, SONICS, USA) with an adjustable power output (maximum 500 W
at 20 kHz). The reaction mixture was subjected to an ultrasonic treatment for 1 h. A white
solid at bottom of the tube was isolated by centrifugation, washed with acetone (2×50 mL×10)
and dried overnight at 353 K.
2. Synthesis of COF-5
As a standard synthesis, COF-5 was prepared using 177 mg of BDBA and 242 mg of
2,3,6,7,10,11-hexahydroxytriphenylene (HHTP, TCI) in 40 mL of a 1:1 v:v solution mixture
of mesitylene and 1,4-dioxane. The synthesis mixture was subjected to an ultrasonic
treatment for 0.5 to 2 h at various power levels (40, 50, and 100%). A gray-purple solid
powder at the bottom of the reactor was isolated by centrifugation, washed with acetone
(2×50 mL×10) and dried at 353 K overnight.
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