Thin Films of MOF-on-Guest@MOF: A Simple Strategy of Designing Electronic Heterostructures

Sindhu, Pooja; Ballav, Nirmalya

doi:10.1021/acs.inorgchem.3c01489

“…The rectification ratio (RR) for the resulting device exceeded 10 5 (Figure 16c), which is one of the best values reported so far for molecular and hybrid rectifiers [45] . In addition, the same group recently reported heterostructure MOFs composed of Cu 3 BTC 2 (top‐layer) and TCNQ@Cu 3 BTC 2 (bottom layer) grown on pre‐functionalized Au‐coated PET substrate [116] . These frameworks showed a RR≈10 5 and featured a high charge carrier concentration of ca.…”

Section: Mof‐based Devices For Specific Electronic Applicationsmentioning

confidence: 81%

Metal‐organic Frameworks in Semiconductor Devices

Parashar,

Jash,

Zharnikov

et al. 2024

Angew Chem Int Ed

2

0

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Metal‐organic frameworks (MOFs) are a specific class of hybrid, crystalline, nano‐porous materials made of metal‐ion‐based ‘nodes’ and organic linkers. Most of the studies on MOFs largely focused on porosity, chemical and structural diversity, gas sorption, sensing, drug delivery, catalysis, and separation applications. In contrast, much less reports paid attention to understanding and tuning the electrical properties of MOFs. Poor electrical conductivity of MOFs (~10‐7 – 10‐10 Scm‐1), reported in earlier studies, impeded their applications in electronics, optoelectronics, and renewable energy storage. To overcome this drawback, the MOF community has adopted several intriguing strategies for electronic applications. The present review focuses on creatively designed bulk MOFs and surface‐anchored MOFs (SURMOFs) with different metal nodes (from transition metals to lanthanides), ligand functionalities, and doping entities, allowing tuning and enhancement of electrical conductivity. Diverse platforms for MOFs‐based electronic device fabrications, conductivity measurements, and underlying charge transport mechanisms are also addressed. Overall, the review highlights the pros and cons of MOFs‐based electronics (MOFtronics), followed by an analysis of the future directions of research, including optimization of the MOF compositions, heterostructures, electrical contacts, device stacking, and further relevant options which can be of interest for MOF researchers and result in improved devices performance.

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“…[45] In addition, the same group recently reported heterostructure MOFs composed of Cu 3 BTC 2 (top-layer) and TCNQ@Cu 3 BTC 2 (bottom layer) grown on pre-functionalized Au-coated PET substrate. [116] These frameworks showed a RR � 10 5 and featured a high charge carrier concentration of ca. 770×10 15 cm À 2 and a high charge carrier mobility of 22.7 cm 2 V À 1 S À 1 .…”

Section: Mof-based Devices For Specific Electronic Applicationsmentioning

confidence: 99%

“…Fabrication of heterostructure MOFs: Heterostructure MOFs, comprised of either two different MOFs or differently doped MOFs (such as in Ref. [116]) would be highly important for applications. They can in particular behave as electrical diodes, relying on the different electrical conductance properties of the contributing parts within the entire device configuration, such as electrode/MOF1/MOF2/electrode or electrode/ doped-MOF1/MOF1/electrode.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Metal‐organic Frameworks in Semiconductor Devices

Parashar,

Jash,

Zharnikov

et al. 2024

Angewandte Chemie

0

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Metal‐organic frameworks (MOFs) are a specific class of hybrid, crystalline, nano‐porous materials made of metal‐ion‐based ‘nodes’ and organic linkers. Most of the studies on MOFs largely focused on porosity, chemical and structural diversity, gas sorption, sensing, drug delivery, catalysis, and separation applications. In contrast, much less reports paid attention to understanding and tuning the electrical properties of MOFs. Poor electrical conductivity of MOFs (~10‐7 – 10‐10 Scm‐1), reported in earlier studies, impeded their applications in electronics, optoelectronics, and renewable energy storage. To overcome this drawback, the MOF community has adopted several intriguing strategies for electronic applications. The present review focuses on creatively designed bulk MOFs and surface‐anchored MOFs (SURMOFs) with different metal nodes (from transition metals to lanthanides), ligand functionalities, and doping entities, allowing tuning and enhancement of electrical conductivity. Diverse platforms for MOFs‐based electronic device fabrications, conductivity measurements, and underlying charge transport mechanisms are also addressed. Overall, the review highlights the pros and cons of MOFs‐based electronics (MOFtronics), followed by an analysis of the future directions of research, including optimization of the MOF compositions, heterostructures, electrical contacts, device stacking, and further relevant options which can be of interest for MOF researchers and result in improved devices performance.

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“…Metal–organic frameworks (MOFs) represent a category of remarkably permeable and crystalline substances characterized by fascinating structures. These materials exhibit broad possibilities for utilization in gas storage and segregation, catalysis, and optical and sensing applications. − By the incorporation of emissive organic connectors or metal clusters, it is possible to produce porous MOF constructions that exhibit intriguing luminescent properties. These unique metal–organic frameworks, referred to as LMOFs, have attracted considerable attention in recent years due to their extensive photophysical features and immense potential for sensing applications in various areas. − Owing to the remarkable degree of precision in controlling both structure and composition by utilizing a wide range of organic linkers and metal clusters, energy transfer LMOFs are highly promising for numerous luminescence recognition applications.…”

Section: Introductionmentioning

confidence: 99%

Bacterial Cellulose–Based MOF Hybrid as a Sensitive Switch Off–On Luminescent Sensor for the Selective Recognition of l-Histidine

Farahmand Kateshali,

Moghzi,

Soleimannejad

et al. 2024

Inorg. Chem.

5

0

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In this study, a stable and luminescent UiO-66-NH2 (UN) and its derivative Cu2+@UN were prepared and utilized successfully as an Off–On luminescent sensing platform for effective, selective, as well as rapid (5 min) detection of l-Histidine (l-His). The UN reveals efficient quenching in the presence of Cu2+ ions through photoinduced electron transition (PET) mechanism as a dynamic quenching process (in the range of 0.01–1 mM) forming Cu2+@UN sensing platform. However, due to the remarkable affinity between l-His and Cu2+, the luminescence of Cu2+@UN is recovered in the presence of l-His indicating Turn-On behavior via a quencher detachment mechanism (QD). A good linear relationship between the l-His concentration and luminescence intensity was observed in the range of 0.01–40 μM (R 2 = 0.9978) with a detection limit of 7 nM for l-His sensing. The suggested method was successfully utilized for l-His determination in real samples with good recoveries and satisfying consequences. Moreover, the result indicates that only l-His induces a significant luminescence restoration of Cu2+@UN and that the signal is significantly greater than that of the other amino acids. Also, the portable test paper based on bacterial cellulose (BC) as the Cu2+@UNBC sensing platform was developed to conveniently evaluate the effective detection of l-His.

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Thin Films of MOF-on-Guest@MOF: A Simple Strategy of Designing Electronic Heterostructures

Cited by 7 publications

References 27 publications

Metal‐organic Frameworks in Semiconductor Devices

Metal‐organic Frameworks in Semiconductor Devices

Metal‐organic Frameworks in Semiconductor Devices

Bacterial Cellulose–Based MOF Hybrid as a Sensitive Switch Off–On Luminescent Sensor for the Selective Recognition of l-Histidine

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