1
|
Kapurwan S, Sahu PK, Raizada M, Kharel R, Konar S. [α-AsW 9O 33] 9- bridged hexagonal clusters of Ln(III) showing field induced SMM behavior: experimental and theoretical insight. Dalton Trans 2023. [PMID: 37357913 DOI: 10.1039/d3dt00406f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
Polyoxometalates (POM), as inorganic polydentate oxygen donors, provide binding opportunities for oxophilic lanthanide metal centers to construct novel Ln-substituted POM materials with exciting structures and attractive properties. Herein, we have reported four arsenotungstate [α-AsW9O33]9- based lanthanide-containing polyoxometalates [CsxK36-x{Ln6(H2O)12(α-AsW9O33)6}]·yH2O (Ln = Er (1), Gd (2), Ho (3), and Tb (4)), which are synthesized in an alkaline medium. Complexes 1-3 are the dimeric structures of [Ln3(H2O)6(α-AsW9O33)3]18- polyanions, whereas complex 4 is a hexamer of the polyanion [Tb (H2O)2(α-AsW9O33)]6- as a building unit. In all the complexes, [α-AsW9O33]9- units are staggered up and down and give rise to the chair conformation, where one [α-AsW9O33]9- unit bridges two Ln(III) centers through four μ2-oxygen and two terminal oxygen atoms, resulting in the hexagonal arrangement of lanthanides. The dynamic magnetic measurement indicates that only complex 1 exhibits slow relaxation of magnetization with an applied dc field (1500 Oe). To gain insight into the slow relaxation of magnetization in complex 1, the ligand-field parameters and the splitting of the ground-state multiplet of the Er(III) ions have been estimated. The ab initio calculation results confirm that the ground state wave function of these molecules (1, 3, and 4) is mainly composed of a mixture of mJ states, and the non-axial crystal field (CF) terms are more predominant than the axial CF term. The solid-state fluorescence spectra of 1-4 reveal that the photoexcitation O → M ligand-to-metal charge-transfer (LMCT) of arsenotungstate fragments is effectively quenched due to the spatial coordination environment around the Ln(III) ion.
Collapse
Affiliation(s)
- Sandhya Kapurwan
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Bhopal By-pass Road, Bhauri, Bhopal-462066, Madhya Pradesh, India.
| | - Pradip Kumar Sahu
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Bhopal By-pass Road, Bhauri, Bhopal-462066, Madhya Pradesh, India.
| | - Mukul Raizada
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Bhopal By-pass Road, Bhauri, Bhopal-462066, Madhya Pradesh, India.
| | - Ranjan Kharel
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Bhopal By-pass Road, Bhauri, Bhopal-462066, Madhya Pradesh, India.
| | - Sanjit Konar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Bhopal By-pass Road, Bhauri, Bhopal-462066, Madhya Pradesh, India.
| |
Collapse
|
2
|
Yang P, Mahmoud ME, Xiang Y, Lin Z, Ma X, Christian JH, Bindra JK, Kinyon JS, Zhao Y, Chen C, Nisar T, Wagner V, Dalal NS, Kortz U. Host–Guest Chemistry in Discrete Polyoxo-12-Palladate(II) Cubes [MO 8Pd 12L 8] n− (M = Sc III, Co II, Cu II, L = AsO 43 –; M = Cd II, Hg II, L = PhAsO 32–): Structure, Magnetism, and Catalytic Hydrogenation. Inorg Chem 2022; 61:18524-18535. [DOI: 10.1021/acs.inorgchem.2c02751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Peng Yang
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, 410082 Changsha, P. R. China
| | | | - Yixian Xiang
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| | - Zhengguo Lin
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
- College of Chemistry and Materials Science, Hebei Normal University, 050024 Shijiazhuang, P. R. China
| | - Xiang Ma
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| | - Jonathan H. Christian
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Jasleen K. Bindra
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Jared S. Kinyon
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Yue Zhao
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, 410082 Changsha, P. R. China
| | - Chaoqin Chen
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, 410082 Changsha, P. R. China
| | - Talha Nisar
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| | - Veit Wagner
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| | - Naresh S. Dalal
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Ulrich Kortz
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| |
Collapse
|
4
|
Hülsey MJ, Sun G, Sautet P, Yan N. Observing Single‐Atom Catalytic Sites During Reactions with Electrospray Ionization Mass Spectrometry. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011632] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Max J. Hülsey
- Department of Chemical and Biomolecular Engineering National University of Singapore 1 Engineering Drive 3 117580 Singapore Singapore
| | - Geng Sun
- Department of Chemistry and Biochemistry University of California Los Angeles CA USA
- Department of Chemical and Biomolecular Engineering University of California Los Angeles CA USA
| | - Philippe Sautet
- Department of Chemistry and Biochemistry University of California Los Angeles CA USA
- Department of Chemical and Biomolecular Engineering University of California Los Angeles CA USA
| | - Ning Yan
- Department of Chemical and Biomolecular Engineering National University of Singapore 1 Engineering Drive 3 117580 Singapore Singapore
| |
Collapse
|
5
|
Hülsey MJ, Sun G, Sautet P, Yan N. Observing Single‐Atom Catalytic Sites During Reactions with Electrospray Ionization Mass Spectrometry. Angew Chem Int Ed Engl 2020; 60:4764-4773. [DOI: 10.1002/anie.202011632] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/30/2020] [Indexed: 02/03/2023]
Affiliation(s)
- Max J. Hülsey
- Department of Chemical and Biomolecular Engineering National University of Singapore 1 Engineering Drive 3 117580 Singapore Singapore
| | - Geng Sun
- Department of Chemistry and Biochemistry University of California Los Angeles CA USA
- Department of Chemical and Biomolecular Engineering University of California Los Angeles CA USA
| | - Philippe Sautet
- Department of Chemistry and Biochemistry University of California Los Angeles CA USA
- Department of Chemical and Biomolecular Engineering University of California Los Angeles CA USA
| | - Ning Yan
- Department of Chemical and Biomolecular Engineering National University of Singapore 1 Engineering Drive 3 117580 Singapore Singapore
| |
Collapse
|