High Electrical Conductivity in Three-Dimensional Porphyrin-Phosphonate Metal Organic-Frameworks

Herein, we report the design and synthesis of a highly electrically conductive and microporous three-dimensional zinc-phosphonate metal-organic framework [Zn(Cu- p -H 4 TPPA)] ⋅2 (CH 3 ) 2 NH 2 + (designated as GTUB3), constructed using the 5,10,15,20‐tetrakis [ p ‐phenylphosphonic acid] porphyrin ( p -H 8 TPPA) organic linker. GTUB3 has an indirect band gap of 1.64 eV and a high average electrical conductivity of 4 S/m, making it a rare example of an electrically conductive zinc metal-organic framework. The N 2 -accessible geometric surface area of GTUB3, as predicted by molecular simulations, is 671 m 2 /g. Owing to its simple, high-yield synthesis at low temperatures, porosity, and electrical conductivity, GTUB3 may be used as a low-cost electrode material in next generation phosphonate-supercapacitors.