Modulating the Electrical Conductivity of Metal-Organic Framework Films with Intercalated Guest Π-Systems

Published

January 26, 2016

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.

Citation

Journal of Materials Chemistry C

Volume

4

Issue

5

Pub Type

Journals

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Keywords

Electrical Conductivity, Metal¿Organic Framework, Guest Intercalation

Citation

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 September 17, 2024)