Electronic Conductivity in a Porous Vanadyl Prussian Blue Analogue upon Air Exposure
Mary Anne Manumpil, Carmen Leal-Cervantes, Matthew R. Hudson, Craig Brown, Hemamala I. Karunadasa
Exposure to humid oxygen or ambient air affords a 5-or-der-of-magnitude increase in the electronic conductivity of a new Prussian blue analog incorporation Co(II) and V(IV)-oxo units. Oxidation produces a mixed-valence framework, where the oxygen exposure time controls the V(IV)/V(V) ratio and thereby the material's conductivity. The oxidized framework shows an intervalence charge transfer band at ca. 4200 cm-1, consistent with class II mixed-valence. Electronic conductivity measurements reveal semiconducting behavior in the mixed-valence frameworks with conductivity values of 10^-5^ S •cm-1 at room temperature and 10-4S•-1 at 100 °C, and activation energies of ca. 03 eV. Nitrogen adsorption measurements at 77 K show that these materials posses permanent porosity before and ater oxidation with BET surface areas of 340 m2g-1 and 370 m2g-1, respectively.
, Leal-Cervantes, C.
, Hudson, M.
, Brown, C.
and Karunadasa, H.
Electronic Conductivity in a Porous Vanadyl Prussian Blue Analogue upon Air Exposure, Inorganic Chemistry, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=923792
(Accessed December 3, 2023)