Photochromic Semiconductive Hydrogen-Bonded Organic Framework (HOF) with Broadband Absorption

Tong Chen; Hui-Bo Jiang; Kai-Bin Jiang; De-Lin Hu; Li-Zhen Cai; Ming-Sheng Wang; Guo-Cong Guo

doi:10.1021/acsami.1c23328

Photochromic Semiconductive Hydrogen-Bonded Organic Framework (HOF) with Broadband Absorption

ACS Appl Mater Interfaces. 2022 Mar 9;14(9):11619-11625. doi: 10.1021/acsami.1c23328. Epub 2022 Feb 24.

Authors

Tong Chen^{1

2}, Hui-Bo Jiang^{1

2}, Kai-Bin Jiang², De-Lin Hu², Li-Zhen Cai², Ming-Sheng Wang², Guo-Cong Guo²

Affiliations

¹ College of Chemical Engineering, Fuzhou University, Fuzhou 350116, Fujian, P. R. China.
² State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, P. R. China.

PMID: 35199511
DOI: 10.1021/acsami.1c23328

Abstract

Semiconductors with broadband photoelectric response have important practical needs in many aspects such as solar energy conversion, photocatalysis, and photodetection. We synthesized the first photochromic semiconductive hydrogen-bonded organic framework (HOF), [H₂(bpyb)](H₂PO₄)₂·2H₂O (1), using the polycyclic viologen cation [H₂(bpyb)] (bpyb = 1,4-bis(tetrapyridyl)benzene). After 1 s of xenon lamp irradiation, compound 1 showed a visible color change from the initial yellowish to dark purple after continuous irradiation. The photoinduced radical product has an absorption band covering 200-1700 nm, which is wider than the absorption ranges of silicon and perovskites. It produced photocurrent when irradiated with a xenon lamp or a laser (355, 532, or 808 nm). The on/off ratio of the current (I_irr/I_dark) can be as high as 300 times under the irradiation of the 808 nm laser with a power of 1.9 W cm^-2. In addition, under the 808 nm light source, the on/off ratio of 1B is 35 times that of 1A.

Keywords: HOF; broadband; photochromism; semiconductor; viologen.