Hierarchically mesoporous o-hydroxyazobenzene polymers with high surface areas can be synthesized without the use of templates in water. In their Communication on
nie.201602667" rel="references:http://dx.doi.org/10.1002/anie.201602667">page 9685 ff., Z. M. Liu and co-workers show that these kinds of porous polymers have multiple functions, including excellent dispersity in polar and apolar solvents, good chelation to metal ions (Zn
2+, Cu
2+, etc.), ultrahigh selectivity for CO
2/N
2 separation, and excellent performance for catalyzing CO
2 conversion.