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Pardiwala A, Kumar S, Jangir R. Insights into organic-inorganic hybrid molecular materials: organoimido functionalized polyoxomolybdates. Dalton Trans 2022; 51:4945-4975. [PMID: 35246674 DOI: 10.1039/d1dt04376e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Polyoxometalates (POMs) are polyatomic anions that comprise transition metal group 5 (V, Nb, Ta) or group 6 (Mo, W) oxyanions connected together by shared oxygen atoms. POMs are fascinating because of their exclusive and remarkable characteristics. One of the most interesting features of POMs is their capability to function as an electron relay by performing stepwise multi-electron redox reactions while maintaining their structural integrity. Functionalization of POMs with amino organic compounds results in organoimido derivatives of polyoxometalates, which have aroused interest due to augmentation of their properties. Comprehensive study has shown that the synthesis methodologies to obtain desired organoimido derivatives of POMs by employing various imido-releasing reagents have progressed drastically in recent decades, particularly the innovative DCC-dehydrating technique. These organoimido functionalized POMs have been used as major building blocks to develop unique nanostructured organic-inorganic hybrid molecular materials. Many conventional organic synthesis processes such as Pd-catalyzed carbon-carbon coupling and esterification reactions have been performed with organoimido functionalized POMs where the presence of POM triggered the reaction process. Thus, investigation of the reactivity of organoimido derivatives of POMs foreshadows the intriguing future of POMs chemistry.
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Affiliation(s)
- Ankita Pardiwala
- Sardar Vallabhbhai National Institute of Technology, Ichchanath, Surat-395 007, Gujarat, India.
| | - Shubham Kumar
- Sardar Vallabhbhai National Institute of Technology, Ichchanath, Surat-395 007, Gujarat, India.
| | - Ritambhara Jangir
- Sardar Vallabhbhai National Institute of Technology, Ichchanath, Surat-395 007, Gujarat, India.
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Kibler AJ, Newton GN. Tuning the electronic structure of organic–inorganic hybrid polyoxometalates: The crucial role of the covalent linkage. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.06.027] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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3
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Jangir R, Antony R, Murugavel R. New sterically encumbered arylimido hexamolybdates for organic oxidation reactions. NEW J CHEM 2016. [DOI: 10.1039/c5nj02330k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Surface modification of the parent hexamolybdate by aryl amines results in useful catalysts for the oxidation of cyclohexene to cyclohexene epoxide and benzyl alcohol to benzaldehyde and benzoic acid.
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Affiliation(s)
- Ritambhara Jangir
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- India
| | - Rajendran Antony
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- India
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Lv C, Khan RNN, Zhang J, Hu J, Hao J, Wei Y. Bifunctionalization of Polyoxometalates with Two Different Organoimido Ligands. Chemistry 2012; 19:1174-8. [DOI: 10.1002/chem.201203204] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Revised: 10/16/2012] [Indexed: 11/08/2022]
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Lv C, Hu J, Zhou H, Li Z, Khan RNN, Wei Y. Theoretical investigation of the mechanism of primary amines reacting with hexamolybdate: an insight into the organoimido functionalization and related reactions of polyoxometalates. Chemistry 2012; 18:8681-91. [PMID: 22674753 DOI: 10.1002/chem.201103470] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Revised: 03/30/2012] [Indexed: 02/05/2023]
Abstract
The functionalization of polyoxometalates (POMs), especially with an amino group to yield organonitrogenous derivatives of POMs, is an efficient approach to the enrichment of their structures and the diversification of their properties for various applications. The mechanism for the formation of organonitrogenous-derivatized hexamolybdates was explored by investigating the monofunctionalization of the [Mo(6)O(19)](2-) ion with methylamine using the density functional theory (DFT) method. The calculations show that the direct imidoylization of hexamolybdate with methylamine is both kinetically and thermodynamically unfavorable. However, this imidoylization was found to take place readily in the presence of dimethylcarbodiimide (DMC), for which the free-energy barrier was calculated to be +32.5 kcal mol(-1) in acetonitrile. Moreover, various factors controlling the efficiency of the imidoylization were examined. The calculations show that [W(5)MoO(19)](2-) has a relatively lower reactivity than [Mo(6)O(19)](2-), and that the imidoylization of [W(6)O(19)](2-) is an unfavorable process. With respect to the effect of carbodiimides, it is found that the catalytic activity is directly proportional to the electron-withdrawing effects of the substituents. As to the reactivity of R-NH(2) , the computation results indicate that the free-energy barriers of the substitution reactions are linearly correlated with the basicity constants (pK(b)) of the amino groups. It is noteworthy that the introduction of the proton dramatically decreases the free-energy barrier of the imidoylization of [Mo(6)O(19)](2-) catalyzed by DMC to 24.3 kcal mol(-1) in acetonitrile.
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Affiliation(s)
- Chunlin Lv
- Department of Chemistry, Tsinghua University, Beijing 100084, PR China
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Lv C, Zhang J, Hao J, Liu L, Wei Y. Syntheses and structural characterizations of di-substituted alkylimido hexamolybdates: an insight on bi-alkylimido functionalization. Dalton Trans 2012; 41:10065-70. [DOI: 10.1039/c2dt30471f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liu Q, Hu L, Fu H, Yang J, Fu Q, Liu L, Liu S, Du Z, Ho C, Dai F, Wong W. Langmuir–Blodgett Films of Hexamolybdate and Naphthylamine Prepared by Two Different Approaches: Synthesis, Characterization, and Materials Properties. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100972] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Qian Liu
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People's Republic of China, Fax: +86‐27‐88663043
- Institute of Molecular Functional Materials and Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Hong Kong, People's Republic of China, Fax: +852‐34117348
| | - Lei Hu
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People's Republic of China, Fax: +86‐27‐88663043
| | - Hui Fu
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People's Republic of China, Fax: +86‐27‐88663043
| | - Jun Yang
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People's Republic of China, Fax: +86‐27‐88663043
| | - Qiao‐Min Fu
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People's Republic of China, Fax: +86‐27‐88663043
| | - Li Liu
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People's Republic of China, Fax: +86‐27‐88663043
| | - Shi‐Zhong Liu
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People's Republic of China, Fax: +86‐27‐88663043
| | - Zu‐Liang Du
- Key Laboratory of Special Functional Materials, Henan University, Kaifeng 475001, People's Republic of China
| | - Cheuk‐Lam Ho
- Institute of Molecular Functional Materials and Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Hong Kong, People's Republic of China, Fax: +852‐34117348
| | - Feng‐Rong Dai
- Institute of Molecular Functional Materials and Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Hong Kong, People's Republic of China, Fax: +852‐34117348
| | - Wai‐Yeung Wong
- Institute of Molecular Functional Materials and Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Hong Kong, People's Republic of China, Fax: +852‐34117348
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Dolbecq A, Dumas E, Mayer CR, Mialane P. Hybrid Organic−Inorganic Polyoxometalate Compounds: From Structural Diversity to Applications. Chem Rev 2010; 110:6009-48. [PMID: 20666374 DOI: 10.1021/cr1000578] [Citation(s) in RCA: 1307] [Impact Index Per Article: 93.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anne Dolbecq
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Eddy Dumas
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Cédric R. Mayer
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles cedex, France
| | - Pierre Mialane
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles cedex, France
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Proust A, Thouvenot R, Gouzerh P. Functionalization of polyoxometalates: towards advanced applications in catalysis and materials science. Chem Commun (Camb) 2008:1837-52. [DOI: 10.1039/b715502f] [Citation(s) in RCA: 794] [Impact Index Per Article: 49.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yang G, Guan W, Yan L, Su Z, Xu L, Wang EB. Theoretical Study on the Electronic Spectrum and the Origin of Remarkably Large Third-Order Nonlinear Optical Properties of Organoimide Derivatives of Hexamolybdates. J Phys Chem B 2006; 110:23092-8. [PMID: 17107149 DOI: 10.1021/jp062820p] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Electronic spectrum of organoimide derivatives of hexamolybdates have first been calculated within the time-dependent density-functional theory in conjunction with Van Leeuwen-Baerends (LB94) exchange correlation potential, statistical average of orbital potentials (SAOP), and gradient-regulated connection potential (GRAC), respectively. The GRAC yields much better agreement with experiments for the excitation energies comparing with both LB94 and SAOP. The analysis of transition nature indicates that there is a significant difference between the diagonal and the orthogonal substituted derivatives. The static and dynamic third-order polarizabilities are calculated using time-dependent density-functional theory combined with the sum-over-states method. The results show that these derivatives possess remarkable large molecular third-order polarizabilities, especially for system 8 with -17882.6 x 10(-36) esu. This value is about 250 times that for the C(60) molecule. Adding the organoimide segment to the [Mo(6)O(19)](2-) can substantially increase the nu value. This variation can be traced to the different electronic transition characteristics between the derivatives of [Mo(6)O(19)](2-) and [Mo(6)O(19)](2-). For our studied systems, increasing the conjugation length and diagonal substituted are efficient ways to enhance the third-order polarizability. Thus, the organoimide derivatives of hexamolybdates may comprise a new promising class of nonlinear optical materials from the standpoint of large values, small dispersion behavior, and high transparency.
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Affiliation(s)
- Guochun Yang
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, People's Republic of China
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Xia Y, Wei Y, Wang Y, Guo H. A Kinetically Controlled Trans Bifunctionalized Organoimido Derivative of the Lindqvist-Type Hexamolybdate: Synthesis, Spectroscopic Characterization, and Crystal Structure of (n-Bu4N)2{trans-[Mo6O17(NAr)2]} (Ar = 2,6-dimethylphenyl). Inorg Chem 2005; 44:9823-8. [PMID: 16363852 DOI: 10.1021/ic051319t] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A kinetically controlled trans bifunctionalized organoimido derivative of hexamolybdate, (n-Bu(4)N)(2){trans-[Mo(6)O(17)(NAr)(2)]} (Ar = 2,6-dimethylphenyl) 1, in which the two 2,6-dimethylphenylimido groups are bonded to hexamolybdate at the trans positions, has been successfully synthesized in ca. 60% yield under mild reaction conditions. Its trans structure has been confirmed by a single-crystal X-ray diffraction study. In the crystals, cluster anions of 1 self-assemble into a 3D netlike structure via two different kinds of C-H...O hydrogen bondings, in which 1D supramolecular rectangular channels containing tetrabutylammonium cations form along the a axis. Compound 1 has also been characterized by (1)H NMR, IR, and UV-vis spectroscopic studies. UV-vis-near-IR reflectance spectroscopy measurements reveal the compound's nature of semiconductivity with an optical energy gap of 2.55 eV.
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Affiliation(s)
- Yun Xia
- Department of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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