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Wang D, Ostresh S, Streater D, He P, Nyakuchena J, Ma Q, Zhang X, Neu J, Brudvig GW, Huang J. Dominant Role of Hole Transport Pathway in Achieving Record High Photoconductivity in Two-Dimensional Metal-Organic Frameworks. Angew Chem Int Ed Engl 2023; 62:e202309505. [PMID: 37872121 DOI: 10.1002/anie.202309505] [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: 07/04/2023] [Revised: 10/21/2023] [Accepted: 10/23/2023] [Indexed: 10/25/2023]
Abstract
Metal-organic frameworks (MOFs) with mobile charges have attracted significant attention due to their potential applications in photoelectric devices, chemical resistance sensors, and catalysis. However, fundamental understanding of the charge transport pathway within the framework and the key properties that determine the performance of conductive MOFs in photoelectric devices remain underexplored. Herein, we report the mechanisms of photoinduced charge transport and electron dynamics in the conductive 2D M-HHTP (M=Cu, Zn or Cu/Zn mixed; HHTP=2,3,6,7,10,11-hexahydroxytriphenylene) MOFs and their correlation with photoconductivity using the combination of time-resolved terahertz spectroscopy, optical transient absorption spectroscopy, X-ray transient absorption spectroscopy, and density functional theory (DFT) calculations. We identify the through-space hole transport mechanism through the interlayer sheet π-π interaction, where photoinduced hole state resides in HHTP ligand and electronic state is localized at the metal center. Moreover, the photoconductivity of the Cu-HHTP MOF is found to be 65.5 S m-1 , which represents the record high photoconductivity for porous MOF materials based on catecholate ligands.
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Affiliation(s)
- Denan Wang
- Department of Chemistry, Schiller Institute for Integrated Science and Society, Boston College, Chestnut Hill, MA 02467, USA
| | - Sarah Ostresh
- Department of Chemistry and Yale Energy Science Institute, Yale University, New Haven, CT 06520-8107, USA
| | - Daniel Streater
- Department of Chemistry, Marquette University, Milwaukee, WI 53201, USA
| | - Peilei He
- Department of Chemistry, Marquette University, Milwaukee, WI 53201, USA
| | - James Nyakuchena
- Department of Chemistry, Marquette University, Milwaukee, WI 53201, USA
| | - Qiushi Ma
- Department of Chemistry, Schiller Institute for Integrated Science and Society, Boston College, Chestnut Hill, MA 02467, USA
| | - Xiaoyi Zhang
- X-ray Science Division, Argonne National Laboratory, Argonne, IL 60349, USA
| | - Jens Neu
- Department of Physics, University of North Texas, Denton, TX 76205, USA
| | - Gary W Brudvig
- Department of Chemistry and Yale Energy Science Institute, Yale University, New Haven, CT 06520-8107, USA
| | - Jier Huang
- Department of Chemistry, Schiller Institute for Integrated Science and Society, Boston College, Chestnut Hill, MA 02467, USA
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Abazari R, Sanati S, Li N, Qian J. Fluorinated Metal-Organic Frameworks with Dual-Functionalized Linkers to Enhance Photocatalytic H 2 Evolution and High Water Adsorption. Inorg Chem 2023; 62:18680-18688. [PMID: 37907390 DOI: 10.1021/acs.inorgchem.3c03052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Photocatalytic H2 evolution has recently attracted much attention due to the reduction of nonrenewable energy sources and the increasing demand for renewable sustainable energies. Meanwhile, metal-organic frameworks (MOFs) are emerging potential photocatalysts due to their structural adaptability, porous configuration, several active sites, and a wide range of performance. Nevertheless, there are still limitations in the photocatalytic H2 evolution reaction of MOFs with higher charge recombination rates. Herein, a copper-organic framework with dual-functionalized linkers {[Cu2(L)(H2O)2]·(5DMF)(4H2O)}n (fluorinated MOF(Cu)-NH2; H4L = 3,5-bis(2,4-dicarboxylic acid)-4-(trifluoromethyl)aniline) and with a rare 2-nodal 4,12-connected shp topology has been synthesized by a ligand-functionalization strategy and evaluated for the photocatalytic production of H2 to overcome this issue. According to the photocatalytic H2 evolution results, fluorinated MOF(Cu)-NH2 showed a hydrogen evolution rate of 63.64 mmol·g-1·h-1 exposed to light irradiation, indicating values 12 times that of the pure ligand when cocatalyst Pt and photosensitizer Rhodamine B were present. In addition, this MOF showed a maximum water absorption of 205 cm3·g-1. When dual-functionalized linkers are introduced to the structure of this MOF, its visible-light absorption increases considerably, which can be associated with nearly narrower energy band gaps (2.18 eV). More importantly, this MOF contributes to water absorption and electron collection and transport, acting as a bridge that helps to separate and transfer photogenerated charges while shortening the electron migration path because of the functional group in its configuration. The current paper seeks to shed light on the design of advanced visible-light photocatalysts with no MOF calcination for H2 photocatalytic production.
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Affiliation(s)
- Reza Abazari
- Department of Chemistry, Faculty of Science, University of Maragheh, P.O. Box 55181-83111, Maragheh 83111-55181, Iran
| | - Soheila Sanati
- Department of Chemistry, Faculty of Science, University of Maragheh, P.O. Box 55181-83111, Maragheh 83111-55181, Iran
| | - Nan Li
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang325035, PR China
| | - Jinjie Qian
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang325035, PR China
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3
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Maeda H, Takada K, Fukui N, Nagashima S, Nishihara H. Conductive coordination nanosheets: Sailing to electronics, energy storage, and catalysis. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Intrator JA, Orchanian NM, Clough AJ, Haiges R, Marinescu SC. Electronically-coupled redox centers in trimetallic cobalt complexes. Dalton Trans 2022; 51:5660-5672. [PMID: 35322818 DOI: 10.1039/d1dt03404a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Synthesis and isolation of molecular building blocks of metal-organic frameworks (MOFs) can provide unique opportunities for characterization that would otherwise be inaccessible due to the heterogeneous nature of MOFs. Herein, we report a series of trinuclear cobalt complexes incorporating dithiolene ligands, triphenylene-2,3,6,7,10,11-hexathiolate (THT) (13+), and benzene hexathiolate (BHT) (23+), with 1,1,1,-tris(diphenylphosphinomethyl)ethane (triphos) employed as the capping ligand. Single crystal X-ray analyses of 13+ and 23+ display three five-coordinate cobalt centers bound to the triphos and dithiolene ligands in a distorted square pyramidal geometry. Cyclic voltammetry studies of 13+ and 23+ reveal three redox features associated with the formation of mixed valence states due to the sequential reduction of the redox-active metal centers (CoIII/II). Using this electrochemical data, the comproportionality values were determined for 1 and 2 (log Kc = 1.4 and 1.5 for 1, and 4.7 and 5.8 for 2), suggesting strong resonance-stabilized coupling of the metal centers, with stronger electronic coupling observed for complex 2 compared to that for complex 1. Cyclic voltammetry studies were also performed in solvents of varying polarity, whereupon the difference in the standard potentials (ΔE1/2) for 1 and 2 was found to shift as a function of the polarity of the solvent, indicating a negative correlation between the dielectric constant of the electrochemical medium and the stability of the mixed valence species. Spectroelectrochemical studies of in situ generated multi-valent (MV) states of complexes 1 and 2 display characteristic NIR intervalence charge transfer (IVCT) bands, and analysis of the IVCT transitions for complex 2 suggests a weakly coupled class II multi-valent species and relatively large electronic coupling factors (1700 cm-1 for the first multi-valent state of 22+, and 1400 and 4000 cm-1 for the second multi-valent state of 2+). Density functional theory (DFT) calculations indicate a significant deviation in relative energies of the frontier orbitals of complexes 13+, 23+, and 3+ that contrasts those calculated for the analogous trinuclear cobalt dithiolene complexes employing pentamethylcyclopentadienyl (Cp*) as the capping ligand (Co3Cp*3THT and Co3Cp*3BHT, respectively), and may be a result of the cationic nature of complexes 13+, 23+, and 3+.
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Affiliation(s)
- Jeremy A Intrator
- Department of Chemistry, University of Southern California, Los Angeles, CA, 900089, USA.
| | - Nicholas M Orchanian
- Department of Chemistry, University of Southern California, Los Angeles, CA, 900089, USA.
| | - Andrew J Clough
- Department of Chemistry, University of Southern California, Los Angeles, CA, 900089, USA.
| | - Ralf Haiges
- Department of Chemistry, University of Southern California, Los Angeles, CA, 900089, USA.
| | - Smaranda C Marinescu
- Department of Chemistry, University of Southern California, Los Angeles, CA, 900089, USA.
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Rogozhin AF, Ilichev VA, Fagin AA, Rumyantcev RV, Fukin GK, Yablonskiy AN, Andreev BA, Bochkarev MN. Novel ditopic 2-mercaptothiazoles and their sodium salts: synthesis, structural diversity and luminescence. NEW J CHEM 2022. [DOI: 10.1039/d2nj02746a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A set of novel ditopic 2-mercaptothiazoles has been synthesized. Depending on the nature of the bisthiazoles their sodium salts can form coordination compounds or 2D polymers.
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Affiliation(s)
- Anton F. Rogozhin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, 603950 Nizhny Novgorod, Russian Federation
| | - Vasily A. Ilichev
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, 603950 Nizhny Novgorod, Russian Federation
| | - Anatoly A. Fagin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, 603950 Nizhny Novgorod, Russian Federation
| | - Roman V. Rumyantcev
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, 603950 Nizhny Novgorod, Russian Federation
| | - Georgy K. Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, 603950 Nizhny Novgorod, Russian Federation
| | - Artem N. Yablonskiy
- Institute for Physics of Microstructures of Russian Academy of Sciences, 7 ul. Akademicheskaya, 603950, Nizhny Novgorod, Russian Federation
| | - Boris A. Andreev
- Institute for Physics of Microstructures of Russian Academy of Sciences, 7 ul. Akademicheskaya, 603950, Nizhny Novgorod, Russian Federation
| | - Mikhail N. Bochkarev
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, 603950 Nizhny Novgorod, Russian Federation
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