1
|
NACAROĞLUBALLI J, KIRPIK H, KÖSE M. A Gossypol-hydrazone compound and its sensing properties towards metal ions and nitro-phenolic compounds. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
2
|
Liu H, Brewer CR, Walker AV, McElwee-White L. Photochemistry of 1,5-Cyclooctadiene Platinum Complexes for Photoassisted Chemical Vapor Deposition. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hanwen Liu
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Christopher R. Brewer
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Amy V. Walker
- Department of Materials Science and Engineering, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Lisa McElwee-White
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| |
Collapse
|
3
|
Karuppusamy P, Senthilvelan J, Vijayakumar V, Sarveswari S. A Pyrazole‐Based Highly Selective Colorimetric Chemosensor for Hg
2+
Ion in Semi‐Aqueous Medium. ChemistrySelect 2020. [DOI: 10.1002/slct.201903109] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- P. Karuppusamy
- Department of ChemistryVIT University Vellore - 632014 India
| | - J. Senthilvelan
- Department of ChemistryVIT University Vellore - 632014 India
| | - V. Vijayakumar
- Department of ChemistryVIT University Vellore - 632014 India
| | - S. Sarveswari
- Department of ChemistryVIT University Vellore - 632014 India
| |
Collapse
|
4
|
Lu SH, Li Y, Yang SX, Zhao RD, Lu ZX, Liu XL, Qin Y, Zheng LY, Cao QE. Three Silver Coordination Polymers with Diverse Architectures Constructed from Pyridine Carboxylic Hydrazide Ligands. Inorg Chem 2019; 58:11793-11800. [DOI: 10.1021/acs.inorgchem.9b01874] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Shu-Han Lu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Yuan Li
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Shao-Xiong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Rui-Dun Zhao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Zhi-Xiang Lu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Xiao-Lan Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Yu Qin
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Li-Yan Zheng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Qiu-E Cao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| |
Collapse
|
5
|
Banasz R, Wałęsa-Chorab M. Polymeric complexes of transition metal ions as electrochromic materials: Synthesis and properties. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.03.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
6
|
Hamze R, Jazzar R, Soleilhavoup M, Djurovich PI, Bertrand G, Thompson ME. Phosphorescent 2-, 3- and 4-coordinate cyclic (alkyl)(amino)carbene (CAAC) Cu(i) complexes. Chem Commun (Camb) 2017; 53:9008-9011. [DOI: 10.1039/c7cc02638b] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-, 3- and 4-coordinate CAAC–Cu(i) complexes were prepared and all were found to display phosphorescent emission with microsecond lifetimes.
Collapse
Affiliation(s)
- Rasha Hamze
- Department of Chemistry
- University of Southern California
- Los Angeles
- USA
| | | | | | | | - Guy Bertrand
- Department of Chemistry
- University of California
- La Jolla
- USA
| | - Mark E. Thompson
- Department of Chemistry
- University of Southern California
- Los Angeles
- USA
| |
Collapse
|
7
|
Sagar S, Mongal BN, Dutta A, Mondal P, Lewis W, Saba N, Naskar S. Complexation study of Schiff base ligand: pyridin-2-ylimino methyl naphthanol with Co+2, Mn+2 and Ni+2 ions in solid and solution phase. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1203422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shipra Sagar
- Department of Chemistry, Birla Institute of Technology, Ranchi, India
| | | | - Abhijit Dutta
- Department of Chemistry, Assam University, Silchar, India
| | | | - William Lewis
- School of Chemistry, University of Nottingham, Nottingham, UK
| | - Nadis Saba
- Department of Chemistry, Birla Institute of Technology, Ranchi, India
- Centre for Applied Chemistry, Central University of Jharkhand, Ranchi, India
| | - Subhendu Naskar
- Department of Chemistry, Birla Institute of Technology, Ranchi, India
| |
Collapse
|
8
|
Scalambra F, Serrano-Ruiz M, Nahim-Granados S, Romerosa A. Ruthenium Complexes Containing 2,2′-Bipyridine and 1,3,5-Triaza-7-phosphaadamantane. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501357] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
9
|
Cameron LA, Ziller JW, Heyduk AF. Near-IR absorbing donor-acceptor ligand-to-ligand charge-transfer complexes of nickel(ii). Chem Sci 2016; 7:1807-1814. [PMID: 28959392 PMCID: PMC5604403 DOI: 10.1039/c5sc02703a] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 11/25/2015] [Indexed: 02/05/2023] Open
Abstract
A new series of square-planar nickel(ii) donor-acceptor complexes exhibiting ligand-to-ligand charge-transfer (LL'CT) transitions have been prepared. Whereas the use of a catecholate donor ligand in conjunction with a bipyridyl acceptor ligand affords a complex that absorbs throughout the visible region, the use of a azanidophenolate donor ligands in conjunction with a bipyridyl acceptor ligand affords complexes that absorbs well into the near-IR region of the solar spectrum. Three new complexes, (cat)Ni(bpy t Bu2) (1; (cat)2- = 3,5-di-tert-butyl-1,2-catecholate; bpy t Bu2 = 4,4'-di-tert-butyl-2,2'-bipyridine), (ap)Ni(bpy t Bu2) (2; (ap)2- = 4,6-di-tert-butyl-2-(2,6-diisopropylphenylazanido)phenolate), and (apPh)Ni(bpy t Bu2) (3; (apPh)2- = 10-(2,6-diisopropylphenylazanido)-9-phenanthrolate), have been prepared and characterized by structural, electrochemical, and spectroscopic methods. Whereas all three square-planar complexes show multiple reversible one-electron redox-processes and strong LL'CT absorption bands, in azanidophenolate complexes 2 and 3, the LL'CT absorption covers the near-IR region from 700-1200 nm. The electronic absorption spectra and ground state electrochemical data for 2 and 3 provide an estimate of their excited-state reduction potentials, E+/*, of -1.3 V vs. SCE, making them as potent as the singlet excited state of [Ru(bpy)3]2+.
Collapse
Affiliation(s)
- Lindsay A Cameron
- Department of Chemistry , University of California , Irvine , California 92697 , USA .
| | - Joseph W Ziller
- Department of Chemistry , University of California , Irvine , California 92697 , USA .
| | - Alan F Heyduk
- Department of Chemistry , University of California , Irvine , California 92697 , USA .
| |
Collapse
|
10
|
Gneuß T, Leitl MJ, Finger LH, Rau N, Yersin H, Sundermeyer J. A new class of luminescent Cu(I) complexes with tripodal ligands – TADF emitters for the yellow to red color range. Dalton Trans 2015; 44:8506-20. [PMID: 25434594 DOI: 10.1039/c4dt02631d] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of emissive and neutral Cu(I) compounds with tripodal ligands is presented. The complexes were characterized chemically, computationally, and photophysically. Under ambient conditions, the powders of the compounds exhibit yellow to red emission with quantum yields ranging from about 5% to 35%. The emission represents a thermally activated delayed fluorescence (TADF) combined with a short-lived phosphorescence which represents a rare situation and is a consequence of high spin-orbit coupling (SOC). In the series of the investigated compounds the non-radiative rates increase with decreasing emission energy according to the energy gap law while the radiative rate is almost constant. Furthermore, a well-fit linear dependence between the experimental emission energies and the transition energies calculated by DFT and TD-DFT methods could be established, thus supporting the applicability of these computational methods also to Cu(I) complexes.
Collapse
Affiliation(s)
- Timo Gneuß
- Philipps-Universität Marburg, Materials Science Centre and Fachbereich Chemie, Hans-Meerwein-Straße 4, 35032 Marburg, Germany.
| | | | | | | | | | | |
Collapse
|
11
|
Koley MK, Chatterjee A, Chattopadhyay A, Manoharan PT, Koley AP. Spectroscopic studies for the changes of a Cr(II) compound in solution triggered by the deprotonation of an aqua ligand. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1033412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Manjuri K. Koley
- Department of Chemical Engineering, Birla Institute of Technology and Science-Pilani, Zuarinagar, Goa, India
| | - Amrita Chatterjee
- Department of Chemistry, Birla Institute of Technology and Science-Pilani, Zuarinagar, Goa, India
| | - Anjan Chattopadhyay
- Department of Chemistry, Birla Institute of Technology and Science-Pilani, Zuarinagar, Goa, India
| | | | - Aditya P. Koley
- Department of Chemistry, Birla Institute of Technology and Science-Pilani, Zuarinagar, Goa, India
| |
Collapse
|
12
|
Williams UJ, Schneider D, Dorfner WL, Maichle-Mössmer C, Carroll PJ, Anwander R, Schelter EJ. Variation of electronic transitions and reduction potentials of cerium(IV) complexes. Dalton Trans 2015; 43:16197-206. [PMID: 25148646 DOI: 10.1039/c4dt01386g] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The trivalent compound K[Ce[N(SiHMe2)2]4] was synthesized and oxidized, providing a convenient route to the reported cerium(IV) compound Ce[N(SiHMe2)2]4. Protonolysis reactions of Ce[N(SiHMe2)2]4 with tert-butanol, substituted benzyl alcohols, and 2,6-diphenylphenol yielded the neutral tetravalent compounds Ce(O(t)Bu)4(py)2, Ce2(OCH2C6R5)8(thf)2 (R = Me, F), and Ce(Odpp)4 (dpp = 2,6-(C6H5)2-C6H3). Spectroscopic and electrochemical characterization of the monometallic cerium(IV) silylamide, alkoxide, and aryloxide compounds revealed variable ligand-to-metal charge transfer transitions and metal-based reduction potentials. Computational bonding analyses were performed to complement the physical characterization of the complexes.
Collapse
Affiliation(s)
- Ursula J Williams
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, USA.
| | | | | | | | | | | | | |
Collapse
|
13
|
Gneuß T, Leitl MJ, Finger LH, Yersin H, Sundermeyer J. A new class of deep-blue emitting Cu(i) compounds – effects of counter ions on the emission behavior. Dalton Trans 2015; 44:20045-55. [DOI: 10.1039/c5dt03065j] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A series of three deep-blue emitting Cu(i) compounds with a tripodal ligand is investigated. The compounds only deviate by their respective counter anions. These anions have a significant impact on the emission behavior.
Collapse
Affiliation(s)
- Timo Gneuß
- Philipps-Universität Marburg
- Materials Science Centre and Fachbereich Chemie
- 35032 Marburg
- Germany
| | - Markus J. Leitl
- Universität Regensburg
- Institut für Physikalische und Theoretische Chemie
- Regensburg
- Germany
| | - Lars H. Finger
- Philipps-Universität Marburg
- Materials Science Centre and Fachbereich Chemie
- 35032 Marburg
- Germany
| | - Hartmut Yersin
- Universität Regensburg
- Institut für Physikalische und Theoretische Chemie
- Regensburg
- Germany
| | - Jörg Sundermeyer
- Philipps-Universität Marburg
- Materials Science Centre and Fachbereich Chemie
- 35032 Marburg
- Germany
| |
Collapse
|
14
|
Wang WJ, Lin CH. New Copper(I) Complex with Triazole Derivative Ligand Containing α-Diimine Moiety: Synthesis, Structure, Luminescence and Electrochemistry. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200600175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
15
|
Ramírez CL, Pegoraro CN, Filevich O, Bruttomeso A, Etchenique R, Parise AR. Role of Ruthenium Oxidation States in Ligand-to-Ligand Charge Transfer Processes. Inorg Chem 2012; 51:1261-8. [DOI: 10.1021/ic200966f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Cristina L. Ramírez
- Departamento de Química, FCEN−Universidad Nacional de Mar del Plata,
Funes 3350, 7600 Mar del Plata, Argentina
| | - César N. Pegoraro
- Departamento de Química, FCEN−Universidad Nacional de Mar del Plata,
Funes 3350, 7600 Mar del Plata, Argentina
| | | | | | | | - Alejandro R. Parise
- Departamento de Química, FCEN−Universidad Nacional de Mar del Plata,
Funes 3350, 7600 Mar del Plata, Argentina
| |
Collapse
|
16
|
Odongo OS, Heeg MJ, Chen YJ, Xie P, Endicott JF. Effects of Excited State−Excited State Configurational Mixing on Emission Bandshape Variations in Ruthenium−Bipyridine Complexes. Inorg Chem 2008; 47:7493-511. [DOI: 10.1021/ic7024473] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Onduru S. Odongo
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, and Department of Chemistry, Fu Jen Catholic University, Taipei Hsien 24205, Taiwan, R.O.C
| | - Mary Jane Heeg
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, and Department of Chemistry, Fu Jen Catholic University, Taipei Hsien 24205, Taiwan, R.O.C
| | - Yuan-Jang Chen
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, and Department of Chemistry, Fu Jen Catholic University, Taipei Hsien 24205, Taiwan, R.O.C
| | - Puhui Xie
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, and Department of Chemistry, Fu Jen Catholic University, Taipei Hsien 24205, Taiwan, R.O.C
| | - John F. Endicott
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, and Department of Chemistry, Fu Jen Catholic University, Taipei Hsien 24205, Taiwan, R.O.C
| |
Collapse
|
17
|
|
18
|
Intensity enhancement of intraligand singlet–triplet π–π∗ transition for the coordinated β-diketonate in Ni(II) complexes with a nitroxide radical. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.08.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
19
|
Kaizaki S. Coordination effects of nitroxide radicals in transition metal and lanthanide complexes. Coord Chem Rev 2006. [DOI: 10.1016/j.ccr.2006.02.029] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
20
|
Sieger M, Vogler C, Klein A, Knödler A, Wanner M, Fiedler J, Zális S, Snoeck TL, Kaim W. Geometrical and Electronic Structures of Dinuclear Complex Ions {(μ-bpym)[Cu(EAr3)2]2}2+ with Intramolecular “Organic Sandwich” Formation (E = P or As; Ar = Aryl; bpym = 2,2‘-Bipyrimidine). Inorg Chem 2005; 44:4637-43. [PMID: 15962972 DOI: 10.1021/ic050207z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The compound {(mu-bpym)[Cu(AsPh3)2]2}(BF4)2 (1) has been prepared and studied in comparison with the triphenylphosphine analogue 2. Qualitatively, the structure of 1 with characteristically distorted copper(I) coordination caused by Ph/bpym/Ph sandwich interactions is similar to that of 2 and is approximately reproduced by DFT calculations for the model complex ions {(mu-bpym)[Cu(EMe2Ph)2]2}2+, E = P or As. In contrast, the dinuclear {(mu-bpym)[Cu(P(3-Me-C6H4)3)2]2}(BF4)2 (3) displays a distinctly less distorted metal coordination geometry due to the steric requirements of the methyl groups in the meta-tolyl substituents. The electrochemical reduction of 1 is less reversible than for the phosphine analogues; the one-electron-reduced form 1*- exhibits a broad, unresolved EPR signal at g = 2.0023. Resonance Raman spectroscopy of 1 shows the typical vibrations of the bpym ligand in agreement with the MLCT assignment of the long-wavelength transitions below 500 nm. All three dinuclear complexes exhibit luminescence at room temperature in the solid and in solution.
Collapse
Affiliation(s)
- Monika Sieger
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Miyamoto R, Santo R, Matsushita T, Nishioka T, Ichimura A, Teki Y, Kinoshita I. A complete series of copper(ii) halide complexes (X = F, Cl, Br, I) with a novel Cu(ii)–C(sp3) bond. Dalton Trans 2005:3179-86. [PMID: 16172643 DOI: 10.1039/b507073b] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A complete series of copper(ii) halide complexes [CuX(tptm)](X = F (), Cl (), Br (), I (); tptm = tris(2-pyridylthio)methyl) with a novel Cu(II)-C(sp(3)) bond has been prepared by the reactions of [Cu(tptm)(CH(3)CN)]PF(6)(.PF(6)) with corresponding halide sources of KF or n-Bu(4)NX (X = Cl, Br, I), and the trigonal bipyramidal structures have been confirmed by X-ray crystallography and/or EPR spectroscopy. The iodide complex easily liberates the iodide anion in acetonitrile forming the acetonitrile complex as a result. The EPR spectra of the complexes showed several superhyperfine structures that strongly indicated the presence of spin density on the halide ligands through the Cu-X bond. The results of DFT calculations essentially matched with the X-ray crystallographic and the EPR spectroscopic results. Cyclic voltammetry revealed a quasi-reversible reduction wave for Cu(II)/Cu(I) indicating a trigonal pyramidal coordination for Cu(I) states. A coincidence of the redox potential for all [CuX(tptm)](0/+) processes indicates that the main oxidation site in each complex is the tptm ligand.
Collapse
Affiliation(s)
- Riichi Miyamoto
- Department of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | | | | | | | | | | | | |
Collapse
|
22
|
DelMedico A, Dodsworth ES, Lever ABP, Pietro WJ. Electronic Structure and Spectra of Linkage Isomers of Bis(bipyridine)(1,2-dihydroxy-9,10-anthraquinonato)ruthenium(II) and Their Redox Series. Inorg Chem 2004; 43:2654-71. [PMID: 15074984 DOI: 10.1021/ic035370d] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Linkage isomers of bis(bipyridine)(1,2-dihydroxy-9,10-anthraquinonato)ruthenium(II), 1,2- and 1,9-coordinated complexes, and several of their oxidation products have been prepared chemically and/or electrochemically. For the 1,2-coordinated complex, the one- and two-electron oxidized species have been characterized, and for the 1,9-coordinated complex, the one-electron oxidized species has been characterized. The rich redox activity of these complexes leads to ambiguity in assessing the electronic structure. This paper reports EPR spectra of odd-electron species and detailed analyses of electronic spectra and structure of the complexes, based on INDO molecular orbital calculations. Results of calculations on the related 1-hydroxyanthraquinone complex and the free ligands,1,2-dihydroxy-9,10-anthraquinone (alizarin) and 1-hydroxyanthraquinone, are also briefly discussed.
Collapse
|
23
|
Desrochers PJ, LeLievre S, Johnson RJ, Lamb BT, Phelps AL, Cordes AW, Gu W, Cramer SP. A Stable Monomeric Nickel Borohydride. Inorg Chem 2003; 42:7945-50. [PMID: 14632512 DOI: 10.1021/ic034687a] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A stable discrete nickel borohydride complex (Tp*NiBH(4) or Tp*NiBD(4)) was prepared using the nitrogen-donor ligand hydrotris(3,5-dimethylpyrazolyl)borate (Tp*-). This complex represents one of the best characterized nickel(II) borohydrides to date. Tp*NiBH(4) and Tp*NiBD(4) are stable toward air, boiling water, and high temperatures (mp > 230 degrees C dec). X-ray crystallographic measurements for Tp*NiBH(4) showed a six-coordinate geometry for the complex, with the nickel(II) center facially coordinated by three bridging hydrogen atoms from borohydride and a tridentate Tp(-) ligand. For Tp*NiBH(4), the empirical formula is C(15)H(26)B(2)N(6)Ni, a = 13.469(9) A, b = 7.740(1) A, c = 18.851(2) A, beta = 107.605(9) degrees, the space group is monoclinic P2(1)/c, and Z = 4. Infrared measurements confirmed the presence of bridging hydrogen atoms; both nu(B[bond]H)(terminal) and nu(B[bond]H)(bridging) are assignable and shifted relative to nu(B-D) of Tp*NiBD(4) by amounts in agreement with theory. Despite their hydrolytic stability, Tp*NiBH(4) and Tp*NiBD(4) readily reduce halocarbon substrates, leading to the complete series of Tp*NiX complexes (X = Cl, Br, I). These reactions showed a pronounced hydrogen/deuterium rate dependence (k(H)/k(D) approximately 3) and sharp isosbestic points in progressive electronic spectra. Nickel K-edge X-ray absorption spectroscopy (XAS) measurements of a hydride-rich nickel center were obtained for Tp*NiBH(4), Tp*NiBD(4), and Tp*NiCl. X-ray absorption near-edge spectroscopy results confirmed the similar six-coordinate geometries for Tp*NiBH(4) and Tp*NiBD(4). These contrasted with XAS results for the crystallographically characterized pseudotetrahedral Tp*NiCl complex. The stability of Tp*Ni-coordinated borohydride is significant given this ion's accelerated decomposition and hydrolysis in the presence of transition metals and simple metal salts.
Collapse
Affiliation(s)
- Patrick J Desrochers
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, USA.
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Ye S, Kaim W, Sarkar B, Schwederski B, Lissner F, Schleid T, Duboc-Toia C, Fiedler J. First crystal structure determination and high-frequency EPR study of an organoarsanecopper radical complex. INORG CHEM COMMUN 2003. [DOI: 10.1016/s1387-7003(03)00216-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
25
|
Bailey SE, Zink JI, Nelsen SF. Contributions of symmetric and asymmetric normal coordinates to the intervalence electronic absorption and resonance Raman spectra of a strongly coupled p-phenylenediamine radical cation. J Am Chem Soc 2003; 125:5939-47. [PMID: 12733934 DOI: 10.1021/ja021343v] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Resonance Raman spectroscopy, electronic absorption spectroscopy, and the time-dependent theory of spectroscopy are used to analyze the intervalence electron transfer properties of a strongly delocalized class III molecule, the tetraalkyl-p-phenylene diamine radical cation bis(3-oxo-9-azabicyclo[3.3.1]non-9-yl)benzene ((k33)(2)PD(+)). This molecule is a prototypical system for strongly coupled organic intervalence electron transfer spectroscopy. Resonance Raman excitation profiles in resonance with the lowest energy absorption band are measured. The normal modes of vibration that are most strongly coupled to the intervalence transition are identified and assigned by using UB3LYP/6-31G(d) calculations. Excited state distortions are obtained, and the resonance Raman intensities and excitation profiles are calculated by using the time-dependent theory of Raman spectroscopy. The most highly distorted normal modes are all totally symmetric, but intervalence electron transfer absorption spectra are usually interpreted in terms of a model based on coupling between potential surfaces that are displaced along an asymmetric normal coordinate. This model provides a convenient physical picture for the intervalence compound, but it is inadequate for explaining the spectra. The absorption spectrum arising from only the strongly coupled surfaces consists of a single narrow band, in contrast to the broad, vibronically structured experimental spectrum. The electronic absorption spectrum of (k33)(2)PD(+) is calculated by using exactly the same potential surfaces as those used for the Raman calculations. The importance of symmetric normal coordinates, in addition to the asymmetric coordinate, is discussed. The observed vibronic structure is an example of the missing mode effect; the spacing is interpreted in terms of the time-dependent overlaps in the time domain.
Collapse
Affiliation(s)
- Susan E Bailey
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA
| | | | | |
Collapse
|
26
|
Kunkely H, Vogler A. Electronic spectra of π-cylopentadienyl(triethyl phosphine) copper(I). Ligand-to-ligand charge transfer. INORG CHEM COMMUN 2002. [DOI: 10.1016/s1387-7003(01)00357-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
27
|
Page SE, Flood A, Gordon KC. Electron localisation in electrochemically reduced mono- and bi-nuclear rhenium(i) complexes with bridged polypyridyl ligands. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b110730p] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|