Our new article on hydrochromic porous organic materials has just come out on Communications Chemistry (doi: 10.1038/s42004-020-00364-3) as a collaboration with Prof. Ken Albrecht (Kyushu University) and Prof. Yohei Yamamoto (University of Tsukuba)! Here we have developed an organic porous crystals material, which is made of a twisted donor-acceptor-donor (D-A-D) molecule comprising of our original π-conjugated acceptor (DBPHZ) and the 2nd generation carbazole dendron donors. A simple treatment (solvent annealing) of the D-A-D compound led to a van der Waals porous crystal, which exhibits humidity-responsive color change based on a local fluctuation of molecular conformations in a reversible and sigmoid al fashion. I believe this work showcased the power of synergistic collaboration between synthetic chemists, analytical scientists, and theoretical chemists!

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