1
|
Erik Maris JJ, Parker LA, Stanciakova K, Nikolopoulos N, Berendsen KMH, van Blaaderen A, Meirer F, Rabouw FT, Weckhuysen BM. Molecular Accessibility and Diffusion of Resorufin in Zeolite Crystals. Chemistry 2024; 30:e202302553. [PMID: 37815001 DOI: 10.1002/chem.202302553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 10/07/2023] [Accepted: 10/09/2023] [Indexed: 10/11/2023]
Abstract
We have used confocal laser scanning microscopy on the small, fluorescent resorufin dye molecule to visualize molecular accessibility and diffusion in the hierarchical, anisotropic pore structure of large (~10 μm-sized) zeolite-β crystals. The resorufin dye is widely used in life and materials science, but only in its deprotonated form because the protonated molecule is barely fluorescent in aqueous solution. In this work, we show that protonated resorufin is in fact strongly fluorescent when confined within zeolite micropores, thus enabling fluorescence microimaging experiments. We find that J-aggregation guest-guest interactions lead to a decrease in the measured fluorescence intensity that can be prevented by using non-fluorescent spacer molecules. We characterized the pore space by introducing resorufin from the outside solution and following its diffusion into zeolite-β crystals. The eventual homogeneous distribution of resorufin molecules throughout the zeolite indicates a fully accessible pore network. This enables the quantification of the diffusion coefficient in the straight pores of zeolite-β without the need for complex analysis, and we found a value of 3×10-15 m2 s-1 . Furthermore, we saw that diffusion through the straight pores of zeolite-β is impeded when crossing the boundaries between zeolite subunits.
Collapse
Affiliation(s)
- J J Erik Maris
- Inorganic Chemistry and Catalysis Group, Utrecht University, Debye Institute for Nanomaterials Science and, Institute for Sustainable and Circular Chemistry, Universiteitsweg 99, 3584 CG, Utrecht (The, Netherlands
- Optical Materials Engineering Laboratory, ETH Zürich, Leonhardstrasse 21, 8092, Zürich, Switzerland
| | - Luke A Parker
- Inorganic Chemistry and Catalysis Group, Utrecht University, Debye Institute for Nanomaterials Science and, Institute for Sustainable and Circular Chemistry, Universiteitsweg 99, 3584 CG, Utrecht (The, Netherlands
- TNO, Princetonlaan 6, 3584 CB, Utrecht (The, Netherlands
| | - Katarina Stanciakova
- Inorganic Chemistry and Catalysis Group, Utrecht University, Debye Institute for Nanomaterials Science and, Institute for Sustainable and Circular Chemistry, Universiteitsweg 99, 3584 CG, Utrecht (The, Netherlands
| | - Nikolaos Nikolopoulos
- Inorganic Chemistry and Catalysis Group, Utrecht University, Debye Institute for Nanomaterials Science and, Institute for Sustainable and Circular Chemistry, Universiteitsweg 99, 3584 CG, Utrecht (The, Netherlands
| | - Koen M H Berendsen
- Inorganic Chemistry and Catalysis Group, Utrecht University, Debye Institute for Nanomaterials Science and, Institute for Sustainable and Circular Chemistry, Universiteitsweg 99, 3584 CG, Utrecht (The, Netherlands
| | - Alfons van Blaaderen
- Soft Condensed Matter Group, Utrecht University, Debye Institute for Nanomaterials Science, Princetonplein 1, 3584 CC, Utrecht (The, Netherlands
| | - Florian Meirer
- Inorganic Chemistry and Catalysis Group, Utrecht University, Debye Institute for Nanomaterials Science and, Institute for Sustainable and Circular Chemistry, Universiteitsweg 99, 3584 CG, Utrecht (The, Netherlands
| | - Freddy T Rabouw
- Inorganic Chemistry and Catalysis Group, Utrecht University, Debye Institute for Nanomaterials Science and, Institute for Sustainable and Circular Chemistry, Universiteitsweg 99, 3584 CG, Utrecht (The, Netherlands
- Soft Condensed Matter Group, Utrecht University, Debye Institute for Nanomaterials Science, Princetonplein 1, 3584 CC, Utrecht (The, Netherlands
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Utrecht University, Debye Institute for Nanomaterials Science and, Institute for Sustainable and Circular Chemistry, Universiteitsweg 99, 3584 CG, Utrecht (The, Netherlands
| |
Collapse
|
2
|
Wang R, Bukowski BC, Duan J, Zhang K, Snurr RQ, Hupp JT. Geometry and Chemistry: Influence of Pore Functionalization on Molecular Transport and Diffusion in Solvent-Filled Zirconium Metal-Organic Frameworks. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37883531 DOI: 10.1021/acsami.3c08861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Postsynthetic modification (PSM) of metal-organic frameworks (MOFs) enables incorporation of diverse functionalities in pores for chemical separations, drug delivery, and heterogeneous catalysis. However, the effect of PSM on molecular transport, which is essential for most applications of MOFs, has been rarely studied. In this paper, we used perfluoroalkane-functionalized Zr-MOF NU-1008 as a platform to systematically interrogate transport processes and mechanisms in solvated pores. We anchored perfluoroalkanes onto NU-1008 nodes by solvent-assisted ligand incorporation (SALI-n, with n = 3, 5, 7, and 9 denoting the number of fluorinated carbons). Transport of a luminescent molecule, BODIPY, through individual crystallites of four versions of methanol-filled SALI-n was monitored by confocal fluorescence microscopy as a function of time and location. In comparison with the parent NU-1008, the diffusivity of the probe molecules within SALI-n declined by 2- to 7-fold depending on chain length and loading, presumably due to the reduction in pore diameter or adsorptive interactions with perfluoroalkyl chains. Atomistic simulations were performed to uncover the microscopic behavior of the BODIPY diffusion in SALI-n. The perfluoroalkyl chains are observed to stay close to the pore walls, instead of extending toward the pore center. BODIPY molecules, which preferably interact with linkers, were pushed to the interior of the channels as the chain length increased, resulting in solvated diffusion and minor differences in the short-time mobility of BODIPY in SALI-n. This suggested that the observed decline of transport diffusivity in SALI-n mainly stemmed from the reduction in the pore size when these flexible chains are present. We anticipate that this proof of concept will assist in understanding how pore functionalization can physically and chemically affect mass transport in MOFs and will be useful in further guiding the design of PSM to realize the optimal performance of MOFs for various applications.
Collapse
Affiliation(s)
- Rui Wang
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Brandon C Bukowski
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Jiaxin Duan
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Kun Zhang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China
| | - Randall Q Snurr
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Joseph T Hupp
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| |
Collapse
|
3
|
Ito T. Single-Molecule Fluorescence Investigations of Solute Transport Dynamics in Nanostructured Membrane Separation Materials. J Phys Chem B 2023. [PMID: 37364247 DOI: 10.1021/acs.jpcb.3c02807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Many materials used for membrane separations are composed of nanoscale structures such as pores and domains. Such nanostructures often control the solute permeability and selectivity of the separation membranes. Thus, for future development of highly efficient separation membranes, it is important to understand the structural and chemical properties of these nanostructures and also their influences on solute transport dynamics. For the last two decades, single-molecule fluorescence techniques have been used to measure the detailed dynamics of solute molecules diffusing in various nanostructured materials, giving valuable insights into molecular transport mechanisms influenced by nanoscale material heterogeneity. This Perspective discusses recent single-molecule fluorescence studies on solute diffusion in materials relevant to membrane separations, including dense polymer films and nanoporous materials. These studies have revealed the formation and properties of nanostructures and unique transport dynamics of solute molecules manipulated by their confinement and partitioning to the nanostructures, which play key roles in membrane separations. This Perspective will also point out scientific challenges toward a thorough understanding of molecular-level mechanisms in membrane separations.
Collapse
Affiliation(s)
- Takashi Ito
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-0401, United States
| |
Collapse
|
4
|
Suremann NF, McCarthy BD, Gschwind W, Kumar A, Johnson BA, Hammarström L, Ott S. Molecular Catalysis of Energy Relevance in Metal-Organic Frameworks: From Higher Coordination Sphere to System Effects. Chem Rev 2023; 123:6545-6611. [PMID: 37184577 DOI: 10.1021/acs.chemrev.2c00587] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The modularity and synthetic flexibility of metal-organic frameworks (MOFs) have provoked analogies with enzymes, and even the term MOFzymes has been coined. In this review, we focus on molecular catalysis of energy relevance in MOFs, more specifically water oxidation, oxygen and carbon dioxide reduction, as well as hydrogen evolution in context of the MOF-enzyme analogy. Similar to enzymes, catalyst encapsulation in MOFs leads to structural stabilization under turnover conditions, while catalyst motifs that are synthetically out of reach in a homogeneous solution phase may be attainable as secondary building units in MOFs. Exploring the unique synthetic possibilities in MOFs, specific groups in the second and third coordination sphere around the catalytic active site have been incorporated to facilitate catalysis. A key difference between enzymes and MOFs is the fact that active site concentrations in the latter are often considerably higher, leading to charge and mass transport limitations in MOFs that are more severe than those in enzymes. High catalyst concentrations also put a limit on the distance between catalysts, and thus the available space for higher coordination sphere engineering. As transport is important for MOF-borne catalysis, a system perspective is chosen to highlight concepts that address the issue. A detailed section on transport and light-driven reactivity sets the stage for a concise review of the currently available literature on utilizing principles from Nature and system design for the preparation of catalytic MOF-based materials.
Collapse
Affiliation(s)
- Nina F Suremann
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Brian D McCarthy
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Wanja Gschwind
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Amol Kumar
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Ben A Johnson
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
- Technical University Munich (TUM), Campus Straubing for Biotechnology and Sustainability, Uferstraße 53, 94315 Straubing, Germany
| | - Leif Hammarström
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Sascha Ott
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| |
Collapse
|
5
|
Sharp CH, Bukowski BC, Li H, Johnson EM, Ilic S, Morris AJ, Gersappe D, Snurr RQ, Morris JR. Nanoconfinement and mass transport in metal-organic frameworks. Chem Soc Rev 2021; 50:11530-11558. [PMID: 34661217 DOI: 10.1039/d1cs00558h] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The ubiquity of metal-organic frameworks in recent scientific literature underscores their highly versatile nature. MOFs have been developed for use in a wide array of applications, including: sensors, catalysis, separations, drug delivery, and electrochemical processes. Often overlooked in the discussion of MOF-based materials is the mass transport of guest molecules within the pores and channels. Given the wide distribution of pore sizes, linker functionalization, and crystal sizes, molecular diffusion within MOFs can be highly dependent on the MOF-guest system. In this review, we discuss the major factors that govern the mass transport of molecules through MOFs at both the intracrystalline and intercrystalline scale; provide an overview of the experimental and computational methods used to measure guest diffusivity within MOFs; and highlight the relevance of mass transfer in the applications of MOFs in electrochemical systems, separations, and heterogeneous catalysis.
Collapse
Affiliation(s)
- Conor H Sharp
- National Research Council Associateship Program and Electronic Science and Technology Division, U.S. Naval Research Laboratory, Washington, DC 20375, USA
| | - Brandon C Bukowski
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, USA
| | - Hongyu Li
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, USA
| | - Eric M Johnson
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA.
| | - Stefan Ilic
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA.
| | - Amanda J Morris
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA.
| | - Dilip Gersappe
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, USA
| | - Randall Q Snurr
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, USA
| | - John R Morris
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA.
| |
Collapse
|
6
|
Sun T, Gao Y, Du Y, Zhou L, Chen X. Recent Advances in Developing Lanthanide Metal-Organic Frameworks for Ratiometric Fluorescent Sensing. Front Chem 2021; 8:624592. [PMID: 33569372 PMCID: PMC7868329 DOI: 10.3389/fchem.2020.624592] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Accepted: 12/21/2020] [Indexed: 01/18/2023] Open
Abstract
Fluorescent probes have attracted special attention in developing optical sensor systems due to their reliable and rapid fluorescent response upon reaction with the analyte. Comparing to traditional fluorescent sensing systems that employ the intensity of only a single emission, ratiometric fluorescent sensors exhibit higher sensitivity and allow fast visual screening of analytes because of quantitatively analyzing analytes through the emission intensity ratio at two or more wavelengths. Lanthanide metal–organic frameworks (LnMOFs) are highly designable multifunctional luminescent materials as lanthanide ions, organic ligands, and guest metal ions or chromophores are all potential sources for luminescence. They thus have been widely employed as ratiometric fluorescent sensors. This mini review summarized the basic concept, optical features, construction strategies, and the ratiometric fluorescent sensing mechanisms of dual-emitting LnMOFs. The review ends with a discussion on the prospects, challenges, and new direction in designing LnMOF-based ratiometric fluorescent sensors.
Collapse
Affiliation(s)
- Tianying Sun
- School of Chemical Engineering and Technology/School of Marine Sciences, Sun Yat-sen University, Zhuhai, China
| | - Yaobin Gao
- School of Chemical Engineering and Technology/School of Marine Sciences, Sun Yat-sen University, Zhuhai, China
| | - Yangyang Du
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, China
| | - Lei Zhou
- School of Chemical Engineering and Technology/School of Marine Sciences, Sun Yat-sen University, Zhuhai, China
| | - Xian Chen
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, China
| |
Collapse
|
7
|
|
8
|
Wang R, Bukowski BC, Duan J, Sheridan TR, Atilgan A, Zhang K, Snurr RQ, Hupp JT. Investigating the Process and Mechanism of Molecular Transport within a Representative Solvent-Filled Metal-Organic Framework. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10853-10859. [PMID: 32841562 DOI: 10.1021/acs.langmuir.0c01999] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Effective permeation into, and diffusive mass transport within, solvent-filled metal-organic frameworks (MOFs) is critical in applications such as MOF-based chemical catalysis of condensed-phase reactions. In this work, we studied the entry from solution of a luminescent probe molecule, 1,3,5,7-tetramethyl-4,4-difluoroboradiazaindacene (BODIPY), into the 1D channel-type, zirconium-based MOF NU-1008 and subsequent transport of the probe through the MOF. Measurements were accomplished via in situ confocal fluorescence microscopy of individual crystallites, where the evolution of the fluorescence response from the crystallite was followed as functions of both time and location within the crystallite. From the confocal data, intracrystalline transport of BODIPY is well-described by one-dimensional diffusion along the channel direction. Varying the chemical identity of the solvent revealed an inverse dependence of probe-molecule diffusivity on bulk-solvent viscosity, qualitatively consistent with expectations from the Stokes-Einstein equation for molecular diffusion. At a more quantitative level, however, measured diffusion coefficients are about 100-fold smaller than expected from Stokes-Einstein, pointing to substantial channel-confinement effects. Evaluation of the confocal data also reveals a non-negligible mass transport resistance, i.e., surface barrier, associated with the probe molecule leaving the solution and permeating the exterior surface of the MOF. Permeation by the probe entails displacement of solvent from the MOF channels. The magnitude of the resistance increases with the size of the solvent molecule. This work draws attention to the importance of MOF structure, external-surface barriers, and solvent molecule identity to the overall transport process in MOFs, which should assist in understanding the performance of MOFs in applications such as condensed-phase heterogeneous catalysis.
Collapse
Affiliation(s)
- Rui Wang
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Brandon C Bukowski
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Jiaxin Duan
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Thomas R Sheridan
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Ahmet Atilgan
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Kun Zhang
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Randall Q Snurr
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Joseph T Hupp
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| |
Collapse
|
9
|
Tashiro S, Mitsui S, Burke DW, Kubota R, Matsushita N, Shionoya M. Core–shell metal–macrocycle framework (MMF): spatially selective dye inclusion through core-to-shell anisotropic transport along crystalline 1D-channels connected by epitaxial growth. CrystEngComm 2020. [DOI: 10.1039/d0ce00120a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Core–shell porous metal–macrocycle frameworks were fabricated via an epitaxial growth procedure to observe core-to-shell anisotropic transport of a dye.
Collapse
Affiliation(s)
- Shohei Tashiro
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Shinya Mitsui
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - David W. Burke
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Ryou Kubota
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Nobuyuki Matsushita
- Department of Chemistry
- College of Science and Research Center for Smart Molecules
- Rikkyo University
- Tokyo 171-8501
- Japan
| | - Mitsuhiko Shionoya
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| |
Collapse
|
10
|
Kim N, Park JH, Paczesny J, Grzybowski BA. Uniform and directional growth of centimeter-sized single crystals of cyclodextrin-based metal organic frameworks. CrystEngComm 2019. [DOI: 10.1039/c9ce00026g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although macroscopically-sized MOF crystals have proven of interest for efficient chromatographic separations, information processing, or optoelectronic devices, growing really large crystals has proven problematic. A growth-and-reseeding method can now produce MOF monocrystals ca. 1 cm3 in volume vs. at most ca. 0.025 cm3 by prior methods.
Collapse
Affiliation(s)
- Namhun Kim
- Center for Soft and Living Matter
- Institute for Basic Science (IBS)
- Ulsan 44919
- Republic of Korea
- Department of Chemistry
| | - Jun Heuk Park
- Center for Soft and Living Matter
- Institute for Basic Science (IBS)
- Ulsan 44919
- Republic of Korea
- Department of Chemistry
| | - Jan Paczesny
- Center for Soft and Living Matter
- Institute for Basic Science (IBS)
- Ulsan 44919
- Republic of Korea
| | - Bartosz A. Grzybowski
- Center for Soft and Living Matter
- Institute for Basic Science (IBS)
- Ulsan 44919
- Republic of Korea
- Department of Chemistry
| |
Collapse
|
11
|
Martins L, Macreadie LK, Sensharma D, Vaesen S, Zhang X, Gough JJ, O'Doherty M, Zhu NY, Rüther M, O'Brien JE, Bradley AL, Schmitt W. Light-harvesting, 3rd generation Ru II/Co II MOF with a large, tubular channel aperture. Chem Commun (Camb) 2019; 55:5013-5016. [PMID: 30968885 DOI: 10.1039/c9cc00206e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A photoactive, hetero-metallic CoII/RuII-based metal-organic framework (MOF) with a large channel aperture, ca. 21 Å, is reported. The photophysical properties of the MOF are derived from the RuII nodes giving rise to emission centred at ca. 620 nm and relatively long triplet 3MLCT lifetimes. In addition to the optical attributes, the 1H-imidazo [4,5-f][1,10]-phenanthroline ligand imparts structural functionality to the MOF which is composed of alternating CoII- and RuII-based nodes of Δ and Λ helicity. The framework maintains its integrity upon activation and shows gas sorption behaviour that is characteristic of mesoporous materials promoting high CO2 sorption capacities and selectivities over N2.
Collapse
Affiliation(s)
- Luana Martins
- School of Chemistry & CRANN Institute, University of Dublin, Trinity College, Dublin 2, Ireland.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Gao W, Cardenal AD, Wang C, Powers DC. In Operando Analysis of Diffusion in Porous Metal‐Organic Framework Catalysts. Chemistry 2018; 25:3465-3476. [DOI: 10.1002/chem.201804490] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Indexed: 01/12/2023]
Affiliation(s)
- Wen‐Yang Gao
- Department of Chemistry Texas A&M University 3255 TAMU College Station TX 77843 USA
| | - Ashley D. Cardenal
- Department of Chemistry Texas A&M University 3255 TAMU College Station TX 77843 USA
| | - Chen‐Hao Wang
- Department of Chemistry Texas A&M University 3255 TAMU College Station TX 77843 USA
| | - David C. Powers
- Department of Chemistry Texas A&M University 3255 TAMU College Station TX 77843 USA
| |
Collapse
|
13
|
Li H, Yang Y, He C, Zeng L, Duan C. Mixed-Ligand Metal–Organic Framework for Two-Photon Responsive Photocatalytic C–N and C–C Coupling Reactions. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03537] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Hanning Li
- State Key Laboratory of Fine Chemicals, Zhang Dayu College of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Yang Yang
- State Key Laboratory of Fine Chemicals, Zhang Dayu College of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Cheng He
- State Key Laboratory of Fine Chemicals, Zhang Dayu College of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Le Zeng
- State Key Laboratory of Fine Chemicals, Zhang Dayu College of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals, Zhang Dayu College of Chemistry, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
14
|
Chen W, Wu C. Synthesis, functionalization, and applications of metal–organic frameworks in biomedicine. Dalton Trans 2018; 47:2114-2133. [DOI: 10.1039/c7dt04116k] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Metal–organic frameworks (MOFs), also known as coordination polymers, have attracted extensive research interest in the past few decades due to their unique physical structures and potentially vast applications.
Collapse
Affiliation(s)
- Wei Chen
- Institute of Medical Engineering
- School of Basic Medical Sciences
- Xi'an Jiaotong University
- Xi'an
- China
| | - Chunsheng Wu
- Institute of Medical Engineering
- School of Basic Medical Sciences
- Xi'an Jiaotong University
- Xi'an
- China
| |
Collapse
|
15
|
Chen Y, Hong S, Fu CW, Hoang T, Li X, Valencia V, Zhang Z, Perman JA, Ma S. Investigation of the Mesoporous Metal-Organic Framework as a New Platform To Study the Transport Phenomena of Biomolecules. ACS APPLIED MATERIALS & INTERFACES 2017; 9:10874-10881. [PMID: 28263545 DOI: 10.1021/acsami.7b00588] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Mesoporous materials, Tb-mesoMOF and MCM-41, were used to study the transport phenomena of biomolecules entering the interior pores from solution. Vitamins B12 and B2 were successfully encapsulated into these mesoporous materials, whereas Tb-mesoMOF (0.33 g of B12/g, 0.01 g of B2/g) adsorbed a higher amount of vitamin per mass than MCM-41 (0.21 g of B12/g, 0.002 g of B2/g). The diffusion mechanism of the biomolecules entering Tb-mesoMOF was evaluated using a mathematical model. The Raman spectroscopy studies showed vitamin B12 has been encapsulated within Tb-mesoMOF's pores, and evaluation of the peak shifts indicated strong interactions linking vitamin B12's pyrroline moiety with Tb-mesoMOF's triazine and benzoate rings. Because of these stronger interactions between the vitamins and Tb-mesoMOF, longer egress times were observed than with MCM-41.
Collapse
Affiliation(s)
- Yao Chen
- State Key Laboratory of Medicinal Chemical Biology, Nankai University , Tianjin 300350, China
| | - Seongmin Hong
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Chung-Wei Fu
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
- Department of Chemistry, Chung Yuan Christian University , 200 Chung Pei Road, Chung-Li 320, Taiwan, ROC
| | - Tran Hoang
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Xiao Li
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Veronica Valencia
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Zhenjie Zhang
- State Key Laboratory of Medicinal Chemical Biology, Nankai University , Tianjin 300350, China
- Department of Chemistry, Nankai University , Tianjin 300071, China
| | - Jason A Perman
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Shengqian Ma
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| |
Collapse
|
16
|
Preiß T, Zimpel A, Wuttke S, Rädler JO. Kinetic Analysis of the Uptake and Release of Fluorescein by Metal-Organic Framework Nanoparticles. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E216. [PMID: 28772575 PMCID: PMC5459203 DOI: 10.3390/ma10020216] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 02/03/2017] [Accepted: 02/09/2017] [Indexed: 01/14/2023]
Abstract
Metal-organic framework nanoparticles (MOF NPs) are promising guest-host materials with applications in separation, storage, catalysis, and drug delivery. However, on- and off-loading of guest molecules by porous MOF nanostructures are still poorly understood. Here we study uptake and release of fluorescein by two representative MOF NPs, MIL-100(Fe) and MIL-101(Cr). Suspensions of these MOF NPs exhibit well-defined size distributions and crystallinity, as verified by electron microscopy, dynamic light scattering, and X-ray diffraction. Using absorbance spectroscopy the equilibrium dissociation constants and maximum numbers of adsorbed fluorescein molecules per NP were determined. Time-resolved fluorescence studies reveal that rates of release and loading are pH dependent. The kinetics observed are compared to theoretical estimates that account for bulk diffusion into NPs, and retarded internal diffusion and adsorption rates. Our study shows that, rather than being simple volumetric carriers, MOF-NPs are dominated by internal surface properties. The findings will help to optimize payload levels and develop release strategies that exploit varying pH for drug delivery.
Collapse
Affiliation(s)
- Tobias Preiß
- Faculty of Physics and Center for NanoScience (CeNS), LMU Munich, Geschwister-Scholl-Platz 1, 80539 Munich, Germany.
| | - Andreas Zimpel
- Department of Chemistry and Center for NanoScience (CeNS), LMU Munich, Butenandtstraße 11 (E), 81377 Munich, Germany.
| | - Stefan Wuttke
- Department of Chemistry and Center for NanoScience (CeNS), LMU Munich, Butenandtstraße 11 (E), 81377 Munich, Germany.
| | - Joachim O Rädler
- Faculty of Physics and Center for NanoScience (CeNS), LMU Munich, Geschwister-Scholl-Platz 1, 80539 Munich, Germany.
| |
Collapse
|
17
|
|
18
|
Epstein IR, Xu B. Reaction-diffusion processes at the nano- and microscales. NATURE NANOTECHNOLOGY 2016; 11:312-319. [PMID: 27045215 DOI: 10.1038/nnano.2016.41] [Citation(s) in RCA: 141] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 02/18/2016] [Indexed: 06/05/2023]
Abstract
The bottom-up fabrication of nano- and microscale structures from primary building blocks (molecules, colloidal particles) has made remarkable progress over the past two decades, but most research has focused on structural aspects, leaving our understanding of the dynamic and spatiotemporal aspects at a relatively primitive stage. In this Review, we draw inspiration from living cells to argue that it is now time to move beyond the generation of structures and explore dynamic processes at the nanoscale. We first introduce nanoscale self-assembly, self-organization and reaction-diffusion processes as essential features of cells. Then, we highlight recent progress towards designing and controlling these fundamental features of life in abiological systems. Specifically, we discuss examples of reaction-diffusion processes that lead to such outcomes as self-assembly, self-organization, unique nanostructures, chemical waves and dynamic order to illustrate their ubiquity within a unifying context of dynamic oscillations and energy dissipation. Finally, we suggest future directions for research on reaction-diffusion processes at the nano- and microscales that we find hold particular promise for a new understanding of science at the nanoscale and the development of new kinds of nanotechnologies for chemical transport, chemical communication and integration with living systems.
Collapse
Affiliation(s)
- Irving R Epstein
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02454-9110, USA
| | - Bing Xu
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02454-9110, USA
| |
Collapse
|
19
|
Kärger J, Ruthven DM. Diffusion in nanoporous materials: fundamental principles, insights and challenges. NEW J CHEM 2016. [DOI: 10.1039/c5nj02836a] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The increasing complexity of nanoporous catalysts and adsorbents presents a challenge to both the experimental measurement and theoretical modeling of transport behavior.
Collapse
Affiliation(s)
- Jörg Kärger
- Faculty of Physics and Earth Sciences
- University of Leipzig
- 04103 Leipzig
- Germany
| | - Douglas M. Ruthven
- Department of Chemical and Biological Engineering
- University of Maine
- Orono
- USA
| |
Collapse
|
20
|
Zhu N, Sensharma D, Wix P, Lennox MJ, Düren T, Wong WY, Schmitt W. Framework Isomerism: Highly Augmented Copper(II)-Paddlewheel-Based MOF with Unusual (3,4)-Net Topology. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501194] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
21
|
Titze T, Lauerer A, Heinke L, Chmelik C, Zimmermann NER, Keil FJ, Ruthven DM, Kärger J. Transport in Nanoporous Materials Including MOFs: The Applicability of Fick’s Laws. Angew Chem Int Ed Engl 2015; 54:14580-3. [DOI: 10.1002/anie.201506954] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Tobias Titze
- Department of Interface Physics, University of Leipzig, Linnéstrasse 5, 04103 Leipzig (Germany)
| | - Alexander Lauerer
- Department of Interface Physics, University of Leipzig, Linnéstrasse 5, 04103 Leipzig (Germany)
| | - Lars Heinke
- Institute of Functional Interfaces, Karlsruher Institut für Technologie, Karlsruhe (Germany)
| | - Christian Chmelik
- Department of Interface Physics, University of Leipzig, Linnéstrasse 5, 04103 Leipzig (Germany)
| | - Nils E. R. Zimmermann
- Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, (USA)
| | - Frerich J. Keil
- Department of Chemical Reaction Engineering, Hamburg University of Technology, Hamburg (Germany)
| | | | - Jörg Kärger
- Department of Interface Physics, University of Leipzig, Linnéstrasse 5, 04103 Leipzig (Germany)
| |
Collapse
|
22
|
Titze T, Lauerer A, Heinke L, Chmelik C, Zimmermann NER, Keil FJ, Ruthven DM, Kärger J. Transport in nanoporösen Materialien, einschließlich MOFs: über die Anwendbarkeit der Fickschen Gesetze. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506954] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
23
|
Shi D, He C, Qi B, Chen C, Niu J, Duan C. Merging of the photocatalysis and copper catalysis in metal-organic frameworks for oxidative C-C bond formation. Chem Sci 2014; 6:1035-1042. [PMID: 29560191 PMCID: PMC5811127 DOI: 10.1039/c4sc02362e] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 10/27/2014] [Indexed: 12/22/2022] Open
Abstract
A new approach to merge Cu-catalysis/Ru-photocatalysis within one single MOF was achieved by incorporating [SiW11O39Ru(H2O)]5– into Cu–BPY MOFs.
The direct formation of new C–C bonds through photocatalytic oxidative coupling from low reactive sp3 C–H bonds using environmentally benign and cheap oxygen as oxidant is an important area in sustainable chemistry. By incorporating the photoredox catalyst [SiW11O39Ru(H2O)]5– into the pores of Cu-based metal–organic frameworks, a new approach for merging Cu-catalysis/Ru-photocatalysis within one single MOF was achieved. The direct CuII–O–W(Ru) bridges made the two metal catalyses being synergetic, enabling the application on the catalysis of the oxidative coupling C–C bond formation from acetophenones and N-phenyl-tetrahydroisoquinoline with excellent conversion and size-selectivity. The method takes advantage of visible light photoredox catalysis to generate iminium ion intermediate from N-phenyl-tetrahydroisoquinoline under mild conditions and the easy combination with Cu-catalyzed activation of nucleophiles. Control catalytic experiments using similar Cu-based sheets but with the photoredox catalytic anions embedded was also investigated for comparison.
Collapse
Affiliation(s)
- Dongying Shi
- State Key Laboratory of Fine Chemicals , Dalian University of Technology , Dalian , 116024 , P. R. China .
| | - Cheng He
- State Key Laboratory of Fine Chemicals , Dalian University of Technology , Dalian , 116024 , P. R. China .
| | - Bo Qi
- State Key Laboratory of Fine Chemicals , Dalian University of Technology , Dalian , 116024 , P. R. China .
| | - Cong Chen
- State Key Laboratory of Fine Chemicals , Dalian University of Technology , Dalian , 116024 , P. R. China .
| | - Jingyang Niu
- College of Chemistry and Chemical Engineering , Henan University , Kaifeng , 475004 , P. R. China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals , Dalian University of Technology , Dalian , 116024 , P. R. China .
| |
Collapse
|
24
|
In situ X-ray snapshot analysis of transient molecular adsorption in a crystalline channel. Nat Chem 2014; 6:913-8. [DOI: 10.1038/nchem.2044] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 07/24/2014] [Indexed: 11/09/2022]
|
25
|
Lanthanide metal-organic frameworks for luminescent sensing and light-emitting applications. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.10.023] [Citation(s) in RCA: 830] [Impact Index Per Article: 83.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
26
|
Yu J, Cui Y, Xu H, Yang Y, Wang Z, Chen B, Qian G. Confinement of pyridinium hemicyanine dye within an anionic metal-organic framework for two-photon-pumped lasing. Nat Commun 2014; 4:2719. [PMID: 24173352 PMCID: PMC4089137 DOI: 10.1038/ncomms3719] [Citation(s) in RCA: 260] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Accepted: 10/07/2013] [Indexed: 12/23/2022] Open
Abstract
Two-photon-pumped dye lasers are very important because of their applications in wavelength up-conversion, optical data storage, biological imaging and photodynamic therapy. Such lasers are very difficult to realize in the solid state because of the aggregation-caused quenching. Here we demonstrate a new two-photon-pumped micro-laser by encapsulating the cationic pyridinium hemicyanine dye into an anionic metal-organic framework (MOF). The resultant MOF⊃dye composite exhibits significant two-photon fluorescence because of the large absorption cross-section and the encapsulation-enhanced luminescent efficiency of the dye. Furthermore, the well-faceted MOF crystal serves as a natural Fabry–Perot resonance cavity, leading to lasing around 640 nm when pumped with a 1064-nm pulse laser. This strategy not only combines the crystalline benefit of MOFs and luminescent behaviour of organic dyes but also creates a new synergistic two-photon-pumped lasing functionality, opening a new avenue for the future creation of solid-state photonic materials and devices. Two-photon-pumped dye lasers are useful for applications such as biological imaging; however, loss processes reduce their efficiency. Here, metal-organic frameworks, into which the laser dye is incorporated, demonstrate enhanced laser operation because losses such as dye aggregation-caused quenching are reduced.
Collapse
Affiliation(s)
- Jiancan Yu
- 1] State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China [2]
| | | | | | | | | | | | | |
Collapse
|
27
|
Aarão Reis FDA, di Caprio D. Crossover from anomalous to normal diffusion in porous media. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:062126. [PMID: 25019744 DOI: 10.1103/physreve.89.062126] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Indexed: 06/03/2023]
Abstract
Random walks (RW) of particles adsorbed in the internal walls of porous deposits produced by ballistic-type growth models are studied. The particles start at the external surface of the deposits and enter their pores in order to simulate an external flux of a species towards a porous solid. For short times, the walker concentration decays as a stretched exponential of the depth z, but a crossover to long-time normal diffusion is observed in most samples. The anomalous concentration profile remains at long times in very porous solids if the walker steps are restricted to nearest neighbors and is accompanied with subdiffusion features. These findings are correlated with a decay of the explored area with z. The study of RW of tracer particles left at the internal part of the solid rules out an interpretation by diffusion equations with position-dependent coefficients. A model of RW in a tube of decreasing cross section explains those results by showing long crossovers from an effective subdiffusion regime to an asymptotic normal diffusion. The crossover position and density are analytically calculated for a tube with area decreasing exponentially with z and show good agreement with numerical data. The anomalous decay of the concentration profile is interpreted as a templating effect of the tube shape on the total number of diffusing particles at each depth, while the volumetric concentration in the actually explored porous region may not have significant decay. These results may explain the anomalous diffusion of metal atoms in porous deposits observed in recent works. They also confirm the difficulty in interpreting experimental or computational data on anomalous transport reported in recent works, particularly if only the concentration profiles are measured.
Collapse
Affiliation(s)
- F D A Aarão Reis
- Instituto de Física, Universidade Federal Fluminense, Avenida Litorânea s/n, 24210-340 Niterói RJ, Brazil
| | - Dung di Caprio
- Institut de Recherche de Chimie Paris, CNRS, Chimie ParisTech, 11, rue P. et M. Curie, 75005 Paris, France
| |
Collapse
|
28
|
Han S, Wei Y, Grzybowski BA. A Metal-Organic Framework Stabilizes an Occluded Photocatalyst. Chemistry 2013; 19:11194-8. [DOI: 10.1002/chem.201302141] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Indexed: 11/09/2022]
|
29
|
Li L, Sun F, Jia J, Borjigin T, Zhu G. Growth of large single MOF crystals and effective separation of organic dyes. CrystEngComm 2013. [DOI: 10.1039/c3ce40137e] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
30
|
Liao Y, Yang SK, Koh K, Matzger AJ, Biteen JS. Heterogeneous single-molecule diffusion in one-, two-, and three-dimensional microporous coordination polymers: directional, trapped, and immobile guests. NANO LETTERS 2012; 12:3080-3085. [PMID: 22551227 DOI: 10.1021/nl300971t] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The diffusion of individual Nile red molecules in three different crystalline microporous coordination polymers (MCPs) is visualized with single-molecule fluorescence microscopy. By localizing molecules with high spatial resolution, the trajectories of the diffusing dyes are reconstructed with nanometer-scale precision. A detailed analysis of these tracks reveals different dynamics and guest-host interactions in each crystal as well as distinct motion types within the same system, suggesting the presence of structural heterogeneities in local environments.
Collapse
Affiliation(s)
- Yi Liao
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | | | | | | | | |
Collapse
|
31
|
Wanderley MM, Wang C, Wu CD, Lin W. A chiral porous metal-organic framework for highly sensitive and enantioselective fluorescence sensing of amino alcohols. J Am Chem Soc 2012; 134:9050-3. [PMID: 22607498 DOI: 10.1021/ja302110d] [Citation(s) in RCA: 313] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A highly porous and fluorescent metal-organic framework (MOF), 1, was built from a chiral tetracarboxylate bridging ligand derived from 1,1'-bi-2-naphthol (BINOL) and a cadmium carboxylate infinite-chain secondary building unit. The fluorescence of 1 can be effectively quenched by amino alcohols via H-bonding with the binaphthol moieties decorating the MOF, leading to a remarkable chiral sensor for amino alcohols with greatly enhanced sensitivity and enantioselectivity over BINOL-based homogeneous systems. The higher detection sensitivity of 1 is due to a preconcentration effect by which the analytes are absorbed and concentrated inside the MOF channels, whereas the higher enantioselectivity of 1 is believed to result from enhanced chiral discrimination owing to the cavity confinement effect and the conformational rigidity of the BINOL groups in the framework. 1 was quenched by four chiral amino alcohols with unprecedentedly high Stern-Volmer constants of 490-31200 M(-1) and enantioselectivity ratios of 1.17-3.12.
Collapse
Affiliation(s)
- Marcela M Wanderley
- Department of Chemistry, University of North Carolina, Chapel Hill, 27599, United States
| | | | | | | |
Collapse
|
32
|
Gao WY, Niu Y, Chen Y, Wojtas L, Cai J, Chen YS, Ma S. Porous metal–organic framework based on a macrocyclic tetracarboxylate ligand exhibiting selective CO2 uptake. CrystEngComm 2012. [DOI: 10.1039/c2ce25484k] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|