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Modulating the Electrical Conductivity of Metal-Organic Framework Films with Intercalated Guest Π-Systems
Published
Author(s)
Zhiyong Guo, Dillip K. Panda, Krishnendu Maity, David Lindsey, T. Gannon Parker, Thomas E. Albrecht-Schmitt, Jorge L. Barreda-Esparza, Peng Xiong, Wei Zhou, Sourav Saha
Abstract
The access to electroactive metal-organic frameworks (MOFs) and the ability to manipulate their electrical conductivity with external stimuli are vital for the realization of MOF-based sensors and electronic devices. A blue-colored electroactive MOF (BMOF) was constructed using 1,2,4,5-tetrakis-(4-carboxyphenyl) benzene (TCPB) struts and redox-active N,N'bis(4-pyridyl)-2,6-dipyrrolidylnaphthalenediimide (BPDPNDI) pillars. Uniform BMOF films grow selectively on ZnO-coated substrates. Electrical conductivity of BMOF film is ca. 6x10-5S/m (25 °C), which surges up to 2.3 x 10-3 S/m upon infiltration of π_acidic methyl viologen (MV2+) guests, but remains unchanged after being exposed to a C60 solution, as the latter gets size-excluded. These results demonstrate for the first time that the conductivity of MOFs can be fine-tuned by doping them with guest π-systems that can promote electron delocalization by forming π-donor/acceptor (D/A) stacks with the redox-active ligands.
Guo, Z.
, Panda, D.
, Maity, K.
, Lindsey, D.
, Parker, T.
, Albrecht-Schmitt, T.
, Barreda-Esparza, J.
, Xiong, P.
, Zhou, W.
and Saha, S.
(2016),
Modulating the Electrical Conductivity of Metal-Organic Framework Films with Intercalated Guest Π-Systems, Journal of Materials Chemistry C, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=918585
(Accessed October 9, 2025)