Microporous hypercross-linked conjugated quinonoid chromophores represent a novel class of amorphous polymers

synthesized by the reaction of anthracene with dimethoxy methane in the presence of FeCl

3

catalyst. Their N

2

adsorption isotherms confirm their microporous nature. Diffuse reflectance UV-Visible (DRS UV-Vis) spectroscopy confirms their matrix built with the conjugated quinonoids by their broad light absorption characteristics extending from 1000 nm to 200 nm with the absorbance maximum close to 400 nm. The catalyst cross-linked anthracene with ―CH

2

― bridges and subsequently dehydrogenating them to form quinonoids. Their Fourier transform infrared (FTIR) spectra showed their characteristic quinonoid vibrations between 1600 and 1700 cm

-1

. The synthesis of polymers was carried out at 30

40

50

60

70 and 80 ℃

but the quinonoid content of the polymer obtained at 80 ℃ was higher than that of the others. Their scanning electron microscopy (SEM) images showed microspheres of 1 to 5 μm size built with tiny particles. Their surfaces were not smooth. The polymer synthesized at 80 ℃ showed 5.1 wt% CO

2

sorption at 25 ℃ and 0.1 MPa

but when it was re-cross-linked

the CO

2

sorption increased to 8 wt%. Hence

hypercross-linked conjugated quinonoid chromophores of anthracene are good for sorption of CO

2

.