Tunable electrical conductivity in metal-organic framework thin film devices
A composition including a porous metal organic framework (MOF) including an open metal site and a guest species capable of charge transfer that can coordinate with the open metal site, wherein the composition is electrically conductive. A method including infiltrating a porous metal organic framework (MOF) including an open metal site with a guest species that is capable of charge transfer; and coordinating the guest species to the open metal site to form a composition including an electrical conductivity greater than an electrical conductivity of the MOF.
1. A method comprising:
infiltrating a porous metal organic framework (MOF) comprising an open metal site, wherein the MOF comprises a plurality of metal ions or metal clusters and a plurality of organic ligands, with a guest species that is capable of charge transfer, wherein the guest species is located within a pore of the MOF; and
coordinating the guest species to the open metal site to form a composition comprising an electrical conductivity greater than an electrical conductivity of the MOF.
2. The method of claim 1 , wherein infiltrating comprises exposing the MOF to the guest species for a period of time.
3. The method of claim 2 , wherein an electrical conductivity of the composition is related to the exposure time.
4. The method of claim 1 , wherein the MOF comprises copper.
5. The method of claim 4 , wherein the MOF comprises Cu 3 (BTC) 2 .
6. The method of claim 4 , wherein the guest species comprises a nitrile moiety, a thiol moiety, or a carbonyl moiety.
7. The method of claim 4 , wherein the guest species comprises 7,7,8,8-tetracyanoquinododimethane.
8. The method of claim 5 , wherein the guest species comprises 7,7,8,8-tetracyanoquinododimethane.
9. The method of claim 1 , wherein the guest species is selected from the group consisting of a nitrile moiety, a thiol moiety, a carbonyl moiety, a thiolate moiety, an amine moiety, an imine moiety, a hydroxyl moiety, or a mixture thereof.
10. The method of claim 1 , wherein the guest species is selected from the group consisting of a thiophene, a dithiopene, a tetrathiafulvalene, an imidazole, a triazole, a tetrazole, or a derivative thereof or a transition metal complex operable to undergo an outer sphere electron transfer.