1
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Gao Y, Xie W, Wang B, Schreckenbach G, Govorov AO, Li X, Wang ZM. Observing the Role of Electron Delocalization in Electronic Transport by Incorporating Actinides into Ligated Metal-Chalcogenide Superatoms. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:15023-15030. [PMID: 39007426 DOI: 10.1021/acs.langmuir.4c01345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Since delocalization of electronic states is a prerequisite for exerting unique electron transport properties, early actinides (An) with highly delocalized 5f/6d orbitals are natural candidates. However, given the experimental difficulties of such radioactive compounds and the complex relativistic effects in theoretical studies, understanding the electronic structure and bonding of actinides is underdeveloped on the periodic table. A further challenge is the very complicated electronic structures encountered in the confinement of actinides, as vividly illustrated by the weakly radioactive Th(Thorium)-encapsulated metal chalcogenide clusters, Th@Co6Te8L6 (L = PH3, PMe3, PEt3). Here we report the electronic structure and the electron transport properties of the Th@Co6Te8L6 clusters and compare them with those of the hollow Co6Te8L6 clusters using the nonequilibrium Green's function combined with relativistic density functional theory (NEGF-DFT). We found that the equilibrium conductance in Th@Co6Te8(PH3)6 (0.76 G0) has been greatly improved over that in Co6Te8(PH3)6 (0.03 G0), which has also been verified under an applied different bias voltage. The covalent bonding character between 6d (Th) and 3d (Co) atomic orbitals resulting from steric confinement is the source of the performance enhancement and a most important factor governing the accessibility of such 5f/6d orbitals. The results are of significance to the rapidly developing field of molecular nanoelectronics.
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Affiliation(s)
- Yang Gao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China
| | - Weiyu Xie
- School of Physics and Optoelectronic Engineering, Hainan University, Haikou 570228, China
| | - Bo Wang
- College of Science, Northeast Electric Power University, No. 169 Changchun Road Jilin City 132012, P. R. China
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Alexander O Govorov
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, United States
| | - Xiaoan Li
- NHC Key Laboratory of Nuclear Technology Medical Transformation, Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Mianyang, Sichuan 621099, China
| | - Zhiming M Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China
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2
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Ryzhikov MR, Kozlova SG. ELECTRON TRANSPORT THROUGH THE Mo6S8 MOLECULE IN THE ELECTRODE–CLUSTER– ELECTRODE SYSTEM: EFFECT OF THE CLUSTER REMOTENESS AND ORIENTATION RELATIVE TO THE ELECTRODES. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622110038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Bista D, Aydt AP, Anderton KJ, Paley DW, Betley TA, Reber AC, Chauhan V, Bartholomew AK, Roy X, Khanna SN. High-Spin Superatom Stabilized by Dual Subshell Filling. J Am Chem Soc 2022; 144:5172-5179. [PMID: 35289175 DOI: 10.1021/jacs.2c00731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Quantum confinement in small symmetric clusters leads to the bunching of electronic states into closely packed shells, enabling the classification of clusters with well-defined valences as superatoms. Like atoms, superatomic clusters with filled shells exhibit enhanced electronic stability. Here, we show that octahedral transition-metal chalcogenide clusters can achieve filled shell electronic configurations when they have 100 valence electrons in 50 orbitals or 114 valence electrons in 57 orbitals. While these stable clusters are intrinsically diamagnetic, we use our understanding of their electronic structures to theoretically predict that a cluster with 107 valence electrons would uniquely combine high stability and high-spin magnetic moment, attained by filling a majority subshell of 57 electrons and a minority subshell of 50 electrons. We experimentally demonstrate this predicted stability, high-spin magnetic moment (S = 7/2), and fully delocalized electronic structure in a new cluster, [NEt4]5[Fe6S8(CN)6]. This work presents the first computational and experimental demonstration of the importance of dual subshell filling in transition-metal chalcogenide clusters.
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Affiliation(s)
- Dinesh Bista
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23220, United States
| | - Alexander P Aydt
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Kevin J Anderton
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Daniel W Paley
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Theodore A Betley
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Arthur C Reber
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23220, United States
| | - Vikas Chauhan
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23220, United States
| | | | - Xavier Roy
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Shiv N Khanna
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23220, United States
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4
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Zhang G, Baranov M, Wang F, Poblet JM, Kozuch S, Leffler N, Shames AI, Clemente-Juan JM, Neyman A, Weinstock IA. Soluble Complexes of Cobalt Oxide Fragments Bring the Unique CO 2 Photoreduction Activity of a Bulk Material into the Flexible Domain of Molecular Science. J Am Chem Soc 2021; 143:20769-20778. [PMID: 34854676 DOI: 10.1021/jacs.1c08817] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The deposition of metal oxides is essential to the fabrication of numerous multicomponent solid-state devices and catalysts. However, the reproducible formation of homogeneous metal oxide films or of nanoparticle dispersions at solid interfaces remains an ongoing challenge. Here we report that molecular hexaniobate cluster anion complexes of structurally and electronically distinct fragments of cubic-spinel and monoclinic Co3O4 can serve as tractable yet well-defined functional analogues of bulk cobalt oxide. Notably, the energies of the highest-occupied and lowest-unoccupied molecular orbitals (HOMO and LUMO) of the molecular complexes, 1, closely match the valence- and conduction-band (VB and CB) energies of the parent bulk oxides. Use of 1 as a molecular analogue of the parent oxides is demonstrated by its remarkably simple deployment as a cocatalyst for direct Z-scheme reduction of CO2 by solar light and water. Namely, evaporation of an aqueous solution of 1 on TiO2-coated fluorinated tin oxide windows (TiO2/FTO), immersion in wet acetonitrile, and irradiation by simulated solar light under an atmosphere of CO2 give H2, CO, and CH4 in ratios nearly identical to those obtained using 20 nm spinel-Co3O4 nanocrystals, but 15 times more rapidly on a Co basis and more rapidly overall than other reported systems. Detailed investigation of the photocatalytic properties of 1 on TiO2/FTO includes confirmation of a direct Z-scheme charge-carrier migration pathway by in situ irradiated X-ray photoelectron spectroscopy. More generally, the findings point to a potentially important new role for coordination chemistry that bridges the conceptual divide between molecular and solid-state science.
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Affiliation(s)
- Guanyun Zhang
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Mark Baranov
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Fei Wang
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Josep M Poblet
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Sebastian Kozuch
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Nitai Leffler
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Alexander I Shames
- Department of Physics, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Juan M Clemente-Juan
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, 46980 Paterna, Spain
| | - Alevtina Neyman
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Ira A Weinstock
- Department of Chemistry and the Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
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5
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Shen J, He H, Sengupta T, Bista D, Reber AC, Pandey R, Khanna SN. Electron transport properties of PAl 12-based cluster complexes. NANOSCALE ADVANCES 2021; 3:6888-6896. [PMID: 36132360 PMCID: PMC9418132 DOI: 10.1039/d1na00355k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 09/10/2021] [Indexed: 06/15/2023]
Abstract
The electronic transport properties of PAl12-based cluster complexes are investigated by density functional theory (DFT) in combination with the non-equilibrium Green's function (NEGF) method. Joining two PAl12 clusters via a germanium linker creates a stable semiconducting complex with a large HOMO-LUMO gap. Sequential attachment of an electron-donating ligand, N-ethyl-2-pyrrolidone, to one of the two linked clusters results in the shifting of the electronic spectrum of the ligated cluster while the energy levels of the unligated cluster are mostly unchanged. Using this approach, one can eventually align the HOMO of the ligated cluster to the LUMO of the non-ligated cluster, thereby significantly reducing the HOMO-LUMO gap of the complex. As a result, the transport properties of the complex are highly dependent on the number of attached ligands. Although a single ligand is observed to generally decrease the current, the inclusion of two or more ligands shows a significant increase in the amount of current at most voltages. The resulting increase of the current can be attributed to two factors, first the reduction in the HOMO-LUMO gap due to ligand attachment which has moved the transmission orbitals into the bias window. Secondly, when two or more ligands are attached to the complex, the HOMOs become delocalized across the scattering region, and this significantly enhances the currents.
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Affiliation(s)
- John Shen
- Department of Physics and Astronomy, Valparaiso University Valparaiso Indiana 46383 USA
| | - Haiying He
- Department of Physics and Astronomy, Valparaiso University Valparaiso Indiana 46383 USA
| | - Turbasu Sengupta
- Department of Physics, Virginia Commonwealth University Richmond Virginia 23284 USA
| | - Dinesh Bista
- Department of Physics, Virginia Commonwealth University Richmond Virginia 23284 USA
| | - Arthur C Reber
- Department of Physics, Virginia Commonwealth University Richmond Virginia 23284 USA
| | - Ravindra Pandey
- Department of Physics, Michigan Technological University Houghton Michigan 49931 USA
| | - Shiv N Khanna
- Department of Physics, Virginia Commonwealth University Richmond Virginia 23284 USA
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6
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Bista D, Sengupta T, Reber AC, Khanna SN. Interfacial magnetism in a fused superatomic cluster [Co 6Se 8(PEt 3) 5] 2. NANOSCALE 2021; 13:15763-15769. [PMID: 34528648 DOI: 10.1039/d1nr00876e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
An isolated Co6Se8(PEt3)6 cluster is non-magnetic; however, we find that a magnetic unit can be formed by fusing two Co6Se8(PEt3)5 superatoms into a [Co6Se8(PEt3)5]2 dimer. Theoretical studies indicate that the dumbbell-shaped [Co6Se8(PEt3)5]2 dimer has a spin moment of 2μB, and the spin density is primarily localized at the interfacial Co-sites where two clusters are fused into a dimer. The dimer has a low ionization energy of 4.17 eV, allowing the dimer to donate charge to C70 during the formation of a cluster assembled material, as seen in recent experiments by Nuckolls and co-workers. The donation of charge causes the dimer's magnetic moment to drop from 2μB to 1μB. We hypothesize that adding electrons to the dimer, such as doping impurities to the crystal lattice, may enhance the magnetic moment by neutralizing the charged cluster. This reveals a strategy for stabilizing magnetic moments in ligated cluster assemblies.
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Affiliation(s)
- Dinesh Bista
- Department of Physics, Virginia Commonwealth University, Richmond, VA, 23284-2000, USA.
| | - Turbasu Sengupta
- Department of Physics, Virginia Commonwealth University, Richmond, VA, 23284-2000, USA.
| | - Arthur C Reber
- Department of Physics, Virginia Commonwealth University, Richmond, VA, 23284-2000, USA.
| | - Shiv N Khanna
- Department of Physics, Virginia Commonwealth University, Richmond, VA, 23284-2000, USA.
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Khanna SN, Reber AC, Bista D, Sengupta T, Lambert R. The superatomic state beyond conventional magic numbers: Ligated metal chalcogenide superatoms. J Chem Phys 2021; 155:120901. [PMID: 34598575 DOI: 10.1063/5.0062582] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The field of cluster science is drawing increasing attention due to the strong size and composition-dependent properties of clusters and the exciting prospect of clusters serving as the building blocks for materials with tailored properties. However, identifying a unifying central paradigm that provides a framework for classifying and understanding the diverse behaviors is an outstanding challenge. One such central paradigm is the superatom concept that was developed for metallic and ligand-protected metallic clusters. The periodic electronic and geometric closed shells in clusters result in their properties being based on the stability they gain when they achieve closed shells. This stabilization results in the clusters having a well-defined valence, allowing them to be classified as superatoms-thus extending the Periodic Table to a third dimension. This Perspective focuses on extending the superatomic concept to ligated metal-chalcogen clusters that have recently been synthesized in solutions and form assemblies with counterions that have wide-ranging applications. Here, we illustrate that the periodic patterns emerge in the electronic structure of ligated metal-chalcogenide clusters. The stabilization gained by the closing of their electronic shells allows for the prediction of their redox properties. Further investigations reveal how the selection of ligands may control the redox properties of the superatoms. These ligated clusters may serve as chemical dopants for two-dimensional semiconductors to control their transport characteristics. Superatomic molecules of multiple metal-chalcogen superatoms allow for the formation of nano-p-n junctions ideal for directed transport and photon harvesting. This Perspective outlines future developments, including the synthesis of magnetic superatoms.
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Affiliation(s)
- Shiv N Khanna
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000, USA
| | - Arthur C Reber
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000, USA
| | - Dinesh Bista
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000, USA
| | - Turbasu Sengupta
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000, USA
| | - Ryan Lambert
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000, USA
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8
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Bista D, Sengupta T, Khanna SN. Massive dipoles across the metal-semiconductor cluster interface: towards chemically controlled rectification. Phys Chem Chem Phys 2021; 23:18975-18982. [PMID: 34612436 DOI: 10.1039/d1cp02420e] [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
An interface between a metallic cluster (MgAl12) and a semiconducting cluster (Re6Se8(PMe3)5) is shown to be marked by a massive dipole reminiscent of a dipolar layer leading to a Schottky barrier at metal-semiconductor interfaces. The metallic cluster MgAl12 with a valence electron count of 38 electrons is two electrons short of 40 electrons needed to complete its electronic shells in a superatomic model and is marked by a significant electron affinity of 2.99 eV. On the other hand, the metal-chalcogenide semiconducting cluster Re6Se8(PMe3)5, consisting of a Re6Se8 core ligated with five trimethylphosphine ligands, is highly stable in the +2 charge-state owing to its electronic shell closure, and has a low ionization energy of 3.3 eV. The composite cluster Re6Se8(PMe3)5-MgAl12 formed by combining the MgAl12 cluster through the unligated site of Re6Se8(PMe3)5 exhibits a massive dipole moment of 28.38 D resulting from a charge flow from Re6Se8(PMe3)5 to the MgAl12 cluster. The highest occupied molecular orbital (HOMO) of the composite cluster is on the MgAl12 side, which is 0.53 eV below the lowest unoccupied molecular orbital (LUMO) localized on the Re6Se8(PMe3)5 cluster, reminiscent of a Schottky barrier at metal-semiconductor interfaces. Therefore, the combination can act as a rectifier, and an application of a voltage of approximately 4.1 V via a homogeneous external electric field is needed to overcome the barrier aligning the two states: the HOMO in MgAl12 with the LUMO in Re6Se8(PMe3)5. Apart from the bias voltage, the barrier can also be reduced by attaching ligands to the metallic cluster, which provides chemical control over rectification. Finally, the fused cluster is shown to be capable of separating electron-hole pairs with minimal recombination, offering the potential for photovoltaic applications.
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Affiliation(s)
- Dinesh Bista
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USA.
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9
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Yuan S, Xu X, Daaoub A, Fang C, Cao W, Chen H, Sangtarash S, Zhang J, Sadeghi H, Hong W. Single-atom control of electrical conductance and thermopower through single-cluster junctions. NANOSCALE 2021; 13:12594-12601. [PMID: 34259698 DOI: 10.1039/d1nr02734d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The control of single atoms offers fundamental insight into understanding the charge transport through single clusters, and the atomic precision of the clusters provides the opportunity to manipulate the charge transport even at the single-atom level. Herein, we designed and investigated the electrical conductance and thermopower of Anderson-type polyoxometalate (POM) clusters with single-atom variation using the scanning tunneling microscopy break-junction (STM-BJ) technique. Our results show the electrical conductance of single clusters can be changed by an order of magnitude by substituting different center-metal atoms, and the electrical conductance of clusters shows different bias-dependence. Furthermore, the Seebeck coefficients of the POM clusters also can be significantly changed by the center-metal atoms. The non-equilibrium quantum transport calculations reveal that the electrostatic potential profile is non-uniformly dependent on the center-metal atoms. This leads to gating of electrical conductance by bias voltage. This supports the tuning of thermopower and bias dependent transmission spectra. This work provides the fundamental understanding of single-atom control of charge transport in POM single-cluster junctions.
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Affiliation(s)
- Saisai Yuan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University Xiamen, 361005, China.
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10
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Abstract
This article reviews the scope of inorganic cluster compounds interrogated in single-molecule break-junction measurements. This body of work lies at the intersection between the fields of inorganic cluster chemistry and single-molecule electronics, where discrete inorganic cluster molecules are used as the active components in molecular electronic circuitry. We explore the breadth of transition metal and main group cluster compounds that have been studied in single-cluster junctions, largely within the context of scanning tunnelling microscopy break-junction (STM-BJ) measurements. Our discussion centers on how the structure and bonding of inorganic cluster compounds give rise to desirable quantum transport effects such as room-temperature current blockade, sequential tunneling, voltage-gated conductance switching, destructive quantum interference, and high thermoelectric currents.
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Affiliation(s)
- Timothy C Siu
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
| | - Joshua Y Wong
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
| | - Matthew O Hight
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
| | - Timothy A Su
- Department of Chemistry, University of California, Riverside, CA 92521, USA. and Materials Science and Engineering Program, University of California, Riverside, CA 92521, USA
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11
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Bista D, Chauhan V, Sengupta T, Reber AC, Khanna SN. A ligand-induced homojunction between aluminum-based superatomic clusters. NANOSCALE 2020; 12:12046-12056. [PMID: 32469025 DOI: 10.1039/d0nr02611e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A superatomic molecule formed by joining two metallic clusters linked by an organometallic bridge can behave like a semiconductor and the addition of ligands can induce a significant energy level shift across an inter-cluster homojunction. This shift is induced by the N-ethyl-2-pyrrolidone ligands, and the placement of the ligands strongly affects the direction of the dipole moment, including the case where the dipole moment is parallel to the cluster interface. This computational study provides an alternative strategy for constructing nanometer-scale electronic interfaces between clusters mimicking semiconductor motifs. The semiconducting features in the PAl12 clusters emerge from the grouping of the quantum states in a confined nearly free electron gas that creates a substantial energy gap. An organometallic Ge(CH3)2(CH2)2 bridge links the clusters while maintaining the cluster's electronic shell structure. The amount of level shifting between the bridged clusters can be changed by controlling the number of ligands. Attaching multiple ligands can result in a broken gap energy alignment in which the HOMO level of one cluster is aligned with the LUMO level of the other bridged cluster. Furthermore, the singly ligated bridged superatomic molecule is found to exhibit promising features to separate the electron-hole pairs for photovoltaic applications.
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Affiliation(s)
- Dinesh Bista
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USA.
| | - Vikas Chauhan
- Ramjas College, University of Delhi, Delhi-110007, India
| | - Turbasu Sengupta
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USA.
| | - Arthur C Reber
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USA.
| | - Shiv N Khanna
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USA.
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12
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Guo JT, Chen XD. Templated syntheses of heterometal tungsten-cobalt-sulfur clusters with different nuclearities. Dalton Trans 2020; 49:5523-5530. [PMID: 32267264 DOI: 10.1039/d0dt00765j] [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 series of new W-Co-S clusters have been synthesized utilizing the complex [Et4N][(Tp*)WS3] (Tp* = hydridotris(3,5-dimethylpyrazol-1-yl)borate(1-)) as the synthetic template, by rational control of the stoichiometry of reactants and by employment of a reductant or precipitant as an auxiliary reagent. By solubility control or addition of a precipitant to avoid the involvement of Cl- in the reaction, the cluster [(Tp*)WS3]2Co (2) could be obtained. With different ratios of the Co source to the template, together with the use of an appropriate amount of reducing reagent, clusters [{(Tp*)WS3}2Co]1- (3) and [{(Tp*)WS3}2Co2Cl]1- (4) could be synthesized as their Et4N+ salts, and [{(Tp*)WS3}2Co4Cl2(DMF)]1- (5) could be isolated as its [Co(DMF)6]2+ salt. A common structural feature of these clusters is that they all have a pair of [(Tp*)WS3] templates chelating different numbers of Co atoms to form W-Co-S clusters with distinct nuclearities. The clusters [(Tp*)WS3]2Co (2) and [{(Tp*)WS3}2Co]1- (3) both have one Co atom chelated by two [(Tp*)WS3] templates, and the difference lies in not only the oxidation states but also the fact that the Co atom in 2 adopts an octahedral coordination environment while that in 3 bears a tetrahedral coordination sphere, which means that the [(Tp*)WS3] template is tri-dentate in 2 and bi-dentate in 3. The cluster [{(Tp*)WS3}2Co2Cl]1- (4) has two Co atoms chelated by a pair of [(Tp*)WS3] templates, in which one of the Co atoms is also terminally bound by a Cl- ligand. There are four Co atoms chelated by two [(Tp*)WS3] templates in the cluster [{(Tp*)WS3}2Co4Cl2(DMF)]1- (5), two of which are bound terminally by the Cl- ligands. Studies of redox properties by cyclic voltammetry indicate the existence of two reversible redox pairs related to clusters 2 and 3, respectively.
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Affiliation(s)
- Jia-Ting Guo
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, Jiangsu, China.
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13
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Gadjieva NA, Champsaur AM, Steigerwald ML, Roy X, Nuckolls C. Dimensional Control of Assembling Metal Chalcogenide Clusters. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000039] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Natalia A. Gadjieva
- Department of Chemistry Columbia University 3000 Broadway 10027 New York New York USA
| | - Anouck M. Champsaur
- Department of Chemistry Columbia University 3000 Broadway 10027 New York New York USA
| | | | - Xavier Roy
- Department of Chemistry Columbia University 3000 Broadway 10027 New York New York USA
| | - Colin Nuckolls
- Department of Chemistry Columbia University 3000 Broadway 10027 New York New York USA
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14
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Reber AC, Chauhan V, Bista D, Khanna SN. Superatomic molecules with internal electric fields for light harvesting. NANOSCALE 2020; 12:4736-4742. [PMID: 32049078 DOI: 10.1039/c9nr09229c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Traditional p-n junctions used for photovoltaics require an interface where a light induced electron-hole pair is separated by an electric field. Developing alternative strategies for forming strong internal electric fields for electron-hole pair separation offers the possibility for better performance. We demonstrate that fusing two superatomic clusters with donor/acceptor ligands on opposite sides of the cluster leads to such a strong internal electric field. In two fused metal-chalcogenide Re6S8Cl2(L)4 clusters with donor PMe3 ligands and acceptor CO ligands on the opposite sides of the fused clusters, the electronic levels undergo shifts analogous to band bending in traditional p-n junctions. The fused cluster has a large dipole moment, and an optical spectrum that strongly absorbs excitation above the HOMO-LUMO gap of the fused clusters, but is optically very weak for the lowest energy excitation that can lead to electron-hole pair recombination. This is because the electron is localized on the CO portion of the fused cluster, while the electron-hole pair is localized on the PMe3 side of the cluster. It is shown that the electronic states localized on each side of the cluster can be aligned/misaligned by applying a voltage in different directions, offering diode like characteristics.
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Affiliation(s)
- Arthur C Reber
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23220, USA.
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15
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Li Y, Yu X, Zhen Y, Dong H, Hu W. Transmission mechanism and quantum interference in fused thienoacenes coupling to Au electrodes through the thiophene rings. Phys Chem Chem Phys 2019; 21:16293-16301. [PMID: 31304481 DOI: 10.1039/c9cp02249j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
So far, quantum interference in molecular devices where the anchors are inseparable parts of the whole molecule has been seldom discussed. In this article, we perform first-principles calculations on the electronic transmission properties of a series of Au-thienoacene-Au junctions where the molecule interacts with electrodes through the S atoms in thiophene rings in a fused-ring system. The calculated binding energy of the Au-S interaction is highly dependent on the substitution sites of the thiophene rings, which agrees with the experimental report that the Au-S interaction is too weak to form a junction for some molecules. The electronic coupling at the molecule-electrode contact is also affected by the molecular structure. To distinguish the coupling mechanism, we show the importance of investigating the electron distribution of frontier molecular orbitals in combination with the percentage of the π system in the partial density of states on the S atoms. Because of the difference in electronic coupling, comparison between molecules should be done with care. On the other hand, conductance suppression due to the destructive quantum interference originating from the molecular topology is demonstrated by comparing the properties of isomers with similar molecule-electrode coupling.
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Affiliation(s)
- Yang Li
- Beijing National Laboratory for Molecular Science, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Xi Yu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China.
| | - Yonggang Zhen
- Beijing National Laboratory for Molecular Science, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Huanli Dong
- Beijing National Laboratory for Molecular Science, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Wenping Hu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China.
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16
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Tanaka Y, Kiguchi M, Akita M. Inorganic and Organometallic Molecular Wires for Single-Molecule Devices. Chemistry 2017; 23:4741-4749. [DOI: 10.1002/chem.201604812] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Yuya Tanaka
- Laboratory for Chemistry and Life Science; Institute of Innovative Research; Tokyo Institute of Technology; 4259 Nagatsuta Midori-ku Yokohama 226-8503 Japan
| | - Manabu Kiguchi
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 Ookayama, Meguro-ku Tokyo 152-8551 Japan
| | - Munetaka Akita
- Laboratory for Chemistry and Life Science; Institute of Innovative Research; Tokyo Institute of Technology; 4259 Nagatsuta Midori-ku Yokohama 226-8503 Japan
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17
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Chauhan V, Reber AC, Khanna SN. Metal Chalcogenide Clusters with Closed Electronic Shells and the Electronic Properties of Alkalis and Halogens. J Am Chem Soc 2017; 139:1871-1877. [DOI: 10.1021/jacs.6b09416] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Vikas Chauhan
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Arthur C. Reber
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Shiv N. Khanna
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia, United States
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18
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Chauhan V, Reber AC, Khanna SN. Transforming Ni9Te6 from Electron Donor to Acceptor via Ligand Exchange. J Phys Chem A 2016; 120:6644-6649. [DOI: 10.1021/acs.jpca.6b05701] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vikas Chauhan
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000, United States
| | - Arthur C. Reber
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000, United States
| | - Shiv N. Khanna
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000, United States
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19
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Yu J, Lee CH, Bouilly D, Han M, Kim P, Steigerwald ML, Roy X, Nuckolls C. Patterning Superatom Dopants on Transition Metal Dichalcogenides. NANO LETTERS 2016; 16:3385-3389. [PMID: 27082448 DOI: 10.1021/acs.nanolett.6b01152] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study describes a new and simple approach to dope two-dimensional transition metal dichalcogenides (TMDCs) using the superatom Co6Se8(PEt3)6 as the electron dopant. Semiconducting TMDCs are wired into field-effect transistor devices and then immersed into a solution of these superatoms. The degree of doping is determined by the concentration of the superatoms in solution and by the length of time the films are immersed in the dopant solution. Using this chemical approach, we are able to turn mono- and few-layer MoS2 samples from moderately to heavily electron-doped states. The same approach applied on WSe2 films changes their characteristics from hole transporting to electron transporting. Moreover, we show that the superatom doping can be patterned on specific areas of TMDC films. To illustrate the power of this technique, we demonstrate the fabrication of a lateral p-n junction by selectively doping only a portion of the channel in a WSe2 device. Finally, encapsulation of the doped films with crystalline hydrocarbon layers stabilizes their properties in an ambient environment.
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Affiliation(s)
- Jaeeun Yu
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Chul-Ho Lee
- KU-KIST Graduate School of Converging Science and Technology, Korea University , Seoul 136-701, Korea
| | - Delphine Bouilly
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Minyong Han
- Department of Applied Physics and Applied Mathematics, Columbia University , New York, New York 10027, United States
| | - Philip Kim
- Department of Physics, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Michael L Steigerwald
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Xavier Roy
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Colin Nuckolls
- Department of Chemistry, Columbia University , New York, New York 10027, United States
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20
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Valášek M, Lindner M, Mayor M. Rigid multipodal platforms for metal surfaces. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2016; 7:374-405. [PMID: 27335731 PMCID: PMC4901557 DOI: 10.3762/bjnano.7.34] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Accepted: 02/17/2016] [Indexed: 06/05/2023]
Abstract
In this review the recent progress in molecular platforms that form rigid and well-defined contact to a metal surface are discussed. Most of the presented examples have at least three anchoring units in order to control the spatial arrangement of the protruding molecular subunit. Another interesting feature is the lateral orientation of these foot structures which, depending on the particular application, is equally important as the spatial arrangement of the molecules. The numerous approaches towards assembling and organizing functional molecules into specific architectures on metal substrates are reviewed here. Particular attention is paid to variations of both, the core structures and the anchoring groups. Furthermore, the analytical methods enabling the investigation of individual molecules as well as monomolecular layers of ordered platform structures are summarized. The presented multipodal platforms bearing several anchoring groups form considerably more stable molecule-metal contacts than corresponding monopodal analogues and exhibit an enlarged separation of the functional molecules due to the increased footprint, as well as restrict tilting of the functional termini with respect to the metal surface. These platforms are thus ideally suited to tune important properties of the molecule-metal interface. On a single-molecule level, several of these platforms enable the control over the arrangement of the protruding rod-type molecular structures (e.g., molecular wires, switches, rotors, sensors) with respect to the surface of the substrate.
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Affiliation(s)
- Michal Valášek
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Marcin Lindner
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Marcel Mayor
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
- Lehn Institute of Functional Materials (LIFM), Sun Yat-Sen University (SYSU), Xingang Rd. W., Guangzhou, China
- Department of Chemistry, University of Basel, St. Johannsring 19, CH-4056 Basel, Switzerland
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21
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Choi B, Capozzi B, Ahn S, Turkiewicz A, Lovat G, Nuckolls C, Steigerwald ML, Venkataraman L, Roy X. Solvent-dependent conductance decay constants in single cluster junctions. Chem Sci 2016; 7:2701-2705. [PMID: 28660043 PMCID: PMC5477014 DOI: 10.1039/c5sc02595h] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 01/11/2016] [Indexed: 11/30/2022] Open
Abstract
We study single cluster electrical transport in a series of metal chalcogenide molecular clusters using scanning tunneling microscope-based break-junction measurements.
Single-molecule conductance measurements have focused primarily on organic molecular systems. Here, we carry out scanning tunneling microscope-based break-junction measurements on a series of metal chalcogenide Co6Se8 clusters capped with conducting ligands of varying lengths. We compare these measurements with those of individual free ligands and find that the conductance of these clusters and the free ligands have different decay constants with increasing ligand length. We also show, through measurements in two different solvents, 1-bromonaphthalene and 1,2,4-trichlorobenzene, that the conductance decay of the clusters depends on the solvent environment. We discuss several mechanisms to explain our observations.
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Affiliation(s)
- Bonnie Choi
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Brian Capozzi
- Department of Applied Physics and Applied Mathematics , Columbia University , New York , New York 10027 , USA .
| | - Seokhoon Ahn
- Institute of Advanced Composite Materials , Korea Institute of Science and Technology , Wanju 565-905 , Korea
| | - Ari Turkiewicz
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Giacomo Lovat
- Department of Applied Physics and Applied Mathematics , Columbia University , New York , New York 10027 , USA .
| | - Colin Nuckolls
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | | | - Latha Venkataraman
- Department of Chemistry , Columbia University , New York , New York 10027 , USA . .,Department of Applied Physics and Applied Mathematics , Columbia University , New York , New York 10027 , USA .
| | - Xavier Roy
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
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22
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Xu H, Wang Q, Qin JH, Zang SQ, Langley SK, Murray KS, Moubaraki B, Batten SR, Mak TCW. A cyclic dodecanuclear cobalt cluster based on a derivative of the rhodamine 6G dye with unusual magnetization. Chem Commun (Camb) 2015; 51:12716-9. [DOI: 10.1039/c5cc04401d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A novel cyclic dodecanuclear cluster [CoII12(L)6(OH)6(Ac)6]·2DMF (1) decorated by a rhodamine 6G derivative (H2L) presents dominant intracluster antiferromagnetic interactions with S-shaped M vs. H plots.
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Affiliation(s)
- Hong Xu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Qian Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Jian-Hua Qin
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Shuang-Quan Zang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Stuart K. Langley
- School of Chemistry
- Monash University
- Clayton
- Australia
- School of Science and the Environment
| | | | - Boujemaa Moubaraki
- School of Science and the Environment
- Chemistry Division
- Manchester Metropolitan University
- Manchester
- England
| | - Stuart R. Batten
- School of Science and the Environment
- Chemistry Division
- Manchester Metropolitan University
- Manchester
- England
| | - Thomas C. W. Mak
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
- Department of Chemistry and Center of Novel Functional Molecules
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23
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Reeves BJ, Shircliff DM, Shott JL, Boardman BM. Synthesis and investigation of cobalt chalcogenide clusters with thienyl phosphine ligands as new acceptor materials for P3HT. Dalton Trans 2015; 44:718-24. [DOI: 10.1039/c4dt02570a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In progress towards a covalently linked organic–inorganic structure, cobalt chalcogenide clusters were synthesized with thienyl phosphines ligands. Results indicate the clusters have potential as new acceptor materials for P3HT.
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Affiliation(s)
- B. J. Reeves
- Department of Chemistry and Biochemistry MSC 4501
- James Madison University
- Harrisonburg
- USA
| | - D. M. Shircliff
- Department of Chemistry and Biochemistry MSC 4501
- James Madison University
- Harrisonburg
- USA
| | - J. L. Shott
- Department of Chemistry and Biochemistry MSC 4501
- James Madison University
- Harrisonburg
- USA
| | - B. M. Boardman
- Department of Chemistry and Biochemistry MSC 4501
- James Madison University
- Harrisonburg
- USA
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24
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Reeves BJ, Boardman BM. Synthesis and characterization of thienyl phosphines and thienyl phosphine chalcogenides. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.02.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Maruyama M, Imoto K, König M, Guldi DM, Ohkoshi SI, Nakamura E, Matsuo Y. Selective Synthesis of Co8S15 Cluster in Bowl-Shaped Template of the Pentaaryl[60]fullerene Ligand. J Am Chem Soc 2013; 135:10914-7. [DOI: 10.1021/ja405045t] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Masashi Maruyama
- Department of Chemistry, School
of Science, The University of Tokyo, Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kenta Imoto
- Department of Chemistry, School
of Science, The University of Tokyo, Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Matthias König
- Department of Chemistry and
Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, Erlangen 91058, Germany
| | - Dirk M. Guldi
- Department of Chemistry and
Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, Erlangen 91058, Germany
| | - Shin-ichi Ohkoshi
- Department of Chemistry, School
of Science, The University of Tokyo, Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
- CREST, JST, K’s
Gobancho, 7 Gobancho, Chiyoda-ku, Tokyo 102-0076, Japan
| | - Eiichi Nakamura
- Department of Chemistry, School
of Science, The University of Tokyo, Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yutaka Matsuo
- Department of Chemistry, School
of Science, The University of Tokyo, Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
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26
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Wang LJ, Yong A, Zhou KG, Tan L, Ye J, Wu GP, Xu ZG, Zhang HL. Conformation-Controlled Electron Transport in Single-Molecule Junctions Containing Oligo(phenylene ethynylene) Derivatives. Chem Asian J 2013; 8:1901-9. [DOI: 10.1002/asia.201300264] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/07/2013] [Indexed: 11/11/2022]
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27
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Zotti LA, Leary E, Soriano M, Cuevas JC, Palacios JJ. A Molecular Platinum Cluster Junction: A Single-Molecule Switch. J Am Chem Soc 2013; 135:2052-5. [DOI: 10.1021/ja3100116] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Linda A. Zotti
- Departamento de Física
de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Edmund Leary
- Departamento de Física
de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño Estudios Avanzados (IMDEA) Nanociencia, E-28049 Madrid,
Spain
| | - Maria Soriano
- Departamento de Física
de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Departamento de Física
Aplicada, Universidad de Alicante, 03690
Alicante, Spain
| | - Juan Carlos Cuevas
- Departamento
de Física
Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | - Juan Jose Palacios
- Departamento de Física
de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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28
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Roy X, Schenck CL, Ahn S, Lalancette RA, Venkataraman L, Nuckolls C, Steigerwald ML. Quantum Soldering of Individual Quantum Dots. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206301] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Roy X, Schenck CL, Ahn S, Lalancette RA, Venkataraman L, Nuckolls C, Steigerwald ML. Quantum Soldering of Individual Quantum Dots. Angew Chem Int Ed Engl 2012; 51:12473-6. [DOI: 10.1002/anie.201206301] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Indexed: 11/06/2022]
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30
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Turner DL, Stone KH, Stephens PW, Walsh A, Singh MP, Vaid TP. Synthesis, Characterization, and Calculated Electronic Structure of the Crystalline Metal–Organic Polymers [Hg(SC6H4S)(en)]n and [Pb(SC6H4S)(dien)]n. Inorg Chem 2011; 51:370-6. [DOI: 10.1021/ic201779a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dayna L. Turner
- Department
of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487,
United States
| | - Kevin H. Stone
- Department
of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794,
United States
| | - Peter W. Stephens
- Department
of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794,
United States
| | - Aron Walsh
- Centre for
Sustainable Chemical
Technologies and Department
of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, U.K
| | - Mayank Pratap Singh
- Department
of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487,
United States
| | - Thomas P. Vaid
- Department
of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487,
United States
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