Modulating the electrical conductivity of metal–organic framework films with intercalated guest π-systems

The access to electroactive metal–organic frameworks (MOFs) and the ability to manipulate their electrical properties with external stimuli are vital for the realization of MOF-based electronic and photonic devices. To this end, we have constructed a new blue colored pillared-paddlewheel (PPW) MOF,...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2016, Vol.4 (5), p.894-899
Main Authors: Guo, Zhiyong, Panda, Dillip K., Maity, Krishnendu, Lindsey, David, Parker, T. Gannon, Albrecht-Schmitt, Thomas E., Barreda-Esparza, Jorge L., Xiong, Peng, Zhou, Wei, Saha, Sourav
Format: Article
Language:English
Subjects:
Buckminsterfullerene
Devices
Electrical conductivity
Electrical resistivity
Electronic devices
Fullerenes
Metal-organic frameworks
Metalorganic compounds
Resistivity
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Summary:The access to electroactive metal–organic frameworks (MOFs) and the ability to manipulate their electrical properties with external stimuli are vital for the realization of MOF-based electronic and photonic devices. To this end, we have constructed a new blue colored pillared-paddlewheel (PPW) MOF, namely BMOF composed of redox-active N , N ′-bis(4-pyridyl)-2,6-dipyrrolidyl naphthalenediimide (BPDPNDI) pillars and 1,2,4,5-tetrakis-(4-carboxyphenyl)benzene (TCPB) struts, and grown stable, uniform BMOF films on ZnO substrates via a bottom-up method for device integration and testing. The electrical conductivity (σ) of BMOF films is ca. 6 × 10 −5 S m −1 (25 °C), which surges up to 2.3 × 10 −3 S m −1 upon infiltration of π-acidic methyl viologen (MV 2+ ) guests, but remains unaffected by large C 60 molecules that are size excluded. These results demonstrate for the first time that the conductivity of MOFs can be fine-tuned by complementary guest π-systems that can promote long-range electron delocalization by forming extended π-stacks with the redox-active ligands.
ISSN:2050-7526
2050-7534
DOI:10.1039/C5TC02232K