1
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Kress C, Sidler E, Downey P, Zwick P, Fuhr O, Fenske D, Bernhard S, Mayor M. Circularly Polarized Luminescence of Thiophene-Bridged Macrocyclic pseudo-meta [2.2]Paracyclophanes. Chemistry 2024; 30:e202303798. [PMID: 38214886 DOI: 10.1002/chem.202303798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/10/2024] [Accepted: 01/12/2024] [Indexed: 01/13/2024]
Abstract
Chiral organic molecules possessing high quantum yields, circular dichroism, and circularly polarized luminescence values have great potential as optically active materials for future applications. Recently, the identification of a promising class of inherently chiral compounds was reported, namely macrocyclic 1,3-butadiyne-linked pseudo-meta[2.2]paracyclophanes, displaying high circular dichroism and related gabs values albeit modest quantum yields. Increasing the quantum yields in an attempt to get bright circularly polarized light emitters, the high-yielding heterocyclization of those 1,3-butadiyne bridges resulting in macrocyclic 2,5-thienyls-linked pseudo-meta [2.2]paracyclophanes is herein described. The chiroptical properties of both, the previously reported 1,3-butadiyne, and the novel 2,5-thienyl bridged macrocycles of various sizes, are experimentally recorded, and theoretically described using density-functional theory.
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Affiliation(s)
- Charlotte Kress
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Eric Sidler
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Payton Downey
- Department of Chemistry, Carnegie Mellon University, 15213, Pittsburgh, Pennsylvania, USA
| | - Patrick Zwick
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Olaf Fuhr
- Institute for Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021, Karlsruhe, Germany
- Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
| | - Dieter Fenske
- Institute for Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021, Karlsruhe, Germany
| | - Stefan Bernhard
- Department of Chemistry, Carnegie Mellon University, 15213, Pittsburgh, Pennsylvania, USA
| | - Marcel Mayor
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
- Institute for Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021, Karlsruhe, Germany
- Lehn Institute of Functional Materials (LIFM), School of Chemistry, Sun Yat-Sen University (SYSU), 510275, Guangzhou, China
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2
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Kürkçüoğlu GS, Kavlak İ, Kınık B, Şahin O. Experimental and theoretical studies on the molecular structures and vibrational spectra of cyanide complexes with 1,2-dimethylimidazole: [M(dmi)2Ni(μ-CN)4]n (M = Cu, Zn or Cd). J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.126892] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Ebina M, Kondo Y, Iwasa T, Taketsugu T. Low-Lying Excited States of hqxcH and Zn-hqxc Complex: Toward Understanding Intramolecular Proton Transfer Emission. Inorg Chem 2019; 58:4686-4698. [PMID: 30860367 DOI: 10.1021/acs.inorgchem.9b00410] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Excited state intramolecular proton transfer (ESIPT) has been a topic of interest due to its potential to lead to multiple emissions. Although many organic molecules showing ESIPT emission are already known, studies on metal complexes showing ESIPT and their related theoretical understandings are very limited. In this study, we focus on [Zn(hqxc)2(DMSO)2] (Zn-hqxc: hqxc = 3-hydroxy-2-quinoxalinecarboxylate, DMSO = dimethyl sulfoxide), which shows ESIPT emission in the solid state, even though the hqxcH ligand does not show ESIPT emission. To gain insights into the role of the zinc atom and the emission mechanisms, we examined excited states of free hqxcH and the Zn-hqxc complex using time-dependent density functional theory calculations. From the results, it was shown that the zinc atom triggers a structural change of the hqxcH ligand from the lactam form (3,4-dihydro-3-oxo-2-quinoxalinecarboxylic acid) to the enol form (3-hydroxy-2-quinoxalinecarboxylic acid), where the latter form has several stable excited states. Several stable geometries were found for singlet and triplet excited states, suggesting that emissions for the Zn-hqxc complex can be both phosphorescence and fluorescence caused by the enol-enol, keto-keto, and keto-enol forms of the two hqcx ligands in the complex. We found that the photophysical properties of the Zn-hqxc complex are dominated by the ligand due to the filled d10 of Zn(II). The presented results suggest that, to design new ESIPT metal complexes, one possible approach is to combine a metal atom showing ligand centered emission and a ligand that has separate ESIPT and coordination sites.
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Affiliation(s)
- Masanori Ebina
- Graduate School of Chemical Sciences and Engineering , Hokkaido University , Sapporo 060-0810 , Japan
| | - Yusuke Kondo
- Elements Strategy Initiative for Catalysts and Batteries (ESICB) , Kyoto University , Kyoto 615-8520 , Japan
| | - Takeshi Iwasa
- Elements Strategy Initiative for Catalysts and Batteries (ESICB) , Kyoto University , Kyoto 615-8520 , Japan.,Department of Chemistry, Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan
| | - Tetsuya Taketsugu
- Graduate School of Chemical Sciences and Engineering , Hokkaido University , Sapporo 060-0810 , Japan.,Elements Strategy Initiative for Catalysts and Batteries (ESICB) , Kyoto University , Kyoto 615-8520 , Japan.,Department of Chemistry, Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) , Hokkaido University , Sapporo 001-0021 , Japan
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4
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Jiang N, Yuan Z, Li T, Zhu Y, Chen YS, Lin L, Zhang J, Chan YT, Wang J. Synthesis and Characterization of Ferrocene Based Hemicages. J Org Chem 2018; 83:4824-4830. [PMID: 29595264 DOI: 10.1021/acs.joc.8b00146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We present a series of tripodal ligands L1-3, which fold into hemicages C1-3 by using coordination-driven dynamic combinational chemistry. The identities of these hemicages were characterized using 1H NMR, 1H-1H COSY, DOSY, and ESI-TWIM-MS. Free rotation of the ferrocene structural units in the ligands affords an adaptable directionality, which is essential for the construction of these hemicages. Encapsulation of adamantane by C2 indicates the presence of a well-defined inner cavity as the binding pocket.
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Affiliation(s)
- Nianqiang Jiang
- School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , People's Republic of China
| | - Ziyong Yuan
- School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , People's Republic of China
| | - Tao Li
- School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , People's Republic of China
| | - Yanpeng Zhu
- School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , People's Republic of China
| | - Yu-Sheng Chen
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan, Republic of China
| | - Liqiong Lin
- School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , People's Republic of China
| | - Jingrui Zhang
- School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , People's Republic of China
| | - Yi-Tsu Chan
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan, Republic of China
| | - Jiaobing Wang
- School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , People's Republic of China
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5
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Padula D, Di Bari L, Pescitelli G. The “Case of Two Compounds with Similar Configuration but Nearly Mirror Image CD Spectra” Refuted. Reassignment of the Absolute Configuration of N-Formyl-3′,4′-dihydrospiro[indan-1,2′(1′H)-pyridine]. J Org Chem 2016; 81:7725-32. [DOI: 10.1021/acs.joc.6b01416] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniele Padula
- Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, via Moruzzi
13, 56124 Pisa, Italy
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, CV4 7AL Coventry, U.K
| | - Lorenzo Di Bari
- Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, via Moruzzi
13, 56124 Pisa, Italy
| | - Gennaro Pescitelli
- Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, via Moruzzi
13, 56124 Pisa, Italy
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6
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Li CY, Zhang T, Chi JS, Yan LK, Su ZM. TDDFT studies on the chiroptical properties of a chiral inorganic polythioanion Möbius strip. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00175g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigate the ECD spectra of a chiral inorganic polythioanion Möbius strip.
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Affiliation(s)
- Chun-Yan Li
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Ting Zhang
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Jia-Shu Chi
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Li-Kai Yan
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Zhong-Min Su
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
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7
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Valencia I, Ávila-Torres Y, Barba-Behrens N, Garzón IL. Circular dichroism and optical absorption spectra of mononuclear and trinuclear chiral Cu(II) amino-alcohol coordinated compounds: A combined theoretical and experimental study. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.12.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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9
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Wu T, Zhang X, You X, Li Y, Bouř P. Chirality Transfer in Magnetic Coordination Complexes Monitored by Vibrational and Electronic Circular Dichroism. Chempluschem 2014. [DOI: 10.1002/cplu.201300429] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tao Wu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093 (P. R. China), Fax: (+86) 25‐83314502
| | - Xiao‐Peng Zhang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093 (P. R. China), Fax: (+86) 25‐83314502
| | - Xiao‐Zeng You
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093 (P. R. China), Fax: (+86) 25‐83314502
| | - Yi‐Zhi Li
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093 (P. R. China), Fax: (+86) 25‐83314502
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo nám. 2, 16610 Prague 6 (Czech Republic), Fax: (+420) 224‐310‐177
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10
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Chepelin O, Ujma J, Wu X, Slawin AMZ, Pitak MB, Coles SJ, Michel J, Jones AC, Barran PE, Lusby PJ. Luminescent, Enantiopure, Phenylatopyridine Iridium-Based Coordination Capsules. J Am Chem Soc 2012; 134:19334-7. [PMID: 23137068 DOI: 10.1021/ja309031h] [Citation(s) in RCA: 156] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Oleg Chepelin
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
| | - Jakub Ujma
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
| | - Xiaohua Wu
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
| | - Alexandra M. Z. Slawin
- EaStCHEM School of Chemistry, University of St. Andrews, Purdie Building, St. Andrews,
Fife KY16 9ST, U.K
| | - Mateusz B. Pitak
- UK National
Crystallography Service,
School of Chemistry, University of Southampton, Southampton, SO17 1BJ, U.K
| | - Simon J. Coles
- UK National
Crystallography Service,
School of Chemistry, University of Southampton, Southampton, SO17 1BJ, U.K
| | - Julien Michel
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
| | - Anita C. Jones
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
| | - Perdita E. Barran
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
| | - Paul J. Lusby
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
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11
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Inorganic and organometallic hemicage podates and cage cryptates incorporating a benzene platform. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Wang JP, Yan LK, Yang GC, Guan W, Su ZM. TDDFT studies on the structures and ECD spectra of chiral bisarylimidos bearing different lengths of o-alkoxy chain-substituted polyoxomolybdates. J Mol Graph Model 2012; 35:49-56. [DOI: 10.1016/j.jmgm.2011.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2011] [Revised: 12/26/2011] [Accepted: 12/28/2011] [Indexed: 10/14/2022]
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13
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Câmpian MV, Perutz RN, Procacci B, Thatcher RJ, Torres O, Whitwood AC. Selective Photochemistry at Stereogenic Metal and Ligand Centers of cis-[Ru(diphosphine)2(H)2]: Preparative, NMR, Solid State, and Laser Flash Studies. J Am Chem Soc 2012; 134:3480-97. [DOI: 10.1021/ja210568t] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Robin N. Perutz
- Department of Chemistry, University of York, York YO10 5DD, U.K
| | | | | | - Olga Torres
- Department of Chemistry, University of York, York YO10 5DD, U.K
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14
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Lunkley JL, Shirotani D, Yamanari K, Kaizaki S, Muller G. Chiroptical spectra of a series of tetrakis((+)-3-heptafluorobutylyrylcamphorato)lanthanide(III) with an encapsulated alkali metal ion: circularly polarized luminescence and absolute chiral structures for the Eu(III) and Sm(III) complexes. Inorg Chem 2011; 50:12724-32. [PMID: 22074461 DOI: 10.1021/ic201851r] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The luminescence and circularly polarized luminescence (CPL) spectra of M(I)[Eu((+)-hfbc)(4)] show a similar behavior to the exciton CD in the intraligand π-π* transitions when the alkali metal ions and solvents are manipulated. There is a difference in susceptibility in solvation toward the alkali metal ions but not toward the Eu(III) ion, as in the case of axially symmetric DOTA-type compounds. The remarkable CPL in the 4f-4f transitions provide much more information on the stereospecific formation of chiral Eu(III) complexes, since CPL spectroscopy is limited to luminescent species and reflects selectively toward helicity of the local structural environment around the lanthanide(III). While in comparison, exciton CD reveals the chiral structural information from the helical arrangement of the four bladed chelates. Of special importance, the observation of the highest CPL activities measured to date for lanthanide(III)-containing compounds (i.e., Eu and Sm) in solution supports the theory that the chirality of lanthanide(III) in the excited state corresponds to that in the ground state, which was derived from the exciton CD.
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Affiliation(s)
- Jamie L Lunkley
- Department of Chemistry, San José State University, One Washington Square, San José, California 95192-0101, USA
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15
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Rudolph M, Autschbach J. Calculation of optical rotatory dispersion and electronic circular dichroism for tris-bidentate groups 8 and 9 metal complexes, with emphasis on exciton coupling. J Phys Chem A 2011; 115:2635-49. [PMID: 21375228 DOI: 10.1021/jp111484z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The optical rotatory dispersion (ORD, both non-resonant and resonant) and the electronic circular dichroism (CD) of tris-bidentate transition metal complexes of the form [M(L)(3)](n+) (M = Fe, Ru, Os, Co, Rh, Ir; n = 2, 3; L = 1,10-phenanthroline, 2,2'-bipyridine) are calculated using time-dependent density functional theory (TDDFT). The exciton CD band resulting from the coupling of ligand π-to-π* transitions is investigated in detail and analyzed in terms of exciton coupling of long-axis transitions using a dipole coupling model that takes TDDFT data for a single ligand as input. Results of the coupling model agree well with the full TDDFT CD spectra. The usefulness and reliability of this model is discussed. The resonant ORDs calculated directly from analytical damped linear TDDFT response compare well with Kramers-Kronig transformations of the calculated CD spectra. For comparisons of resonant ORD with experiment, one needs to consider wavelength shifts.
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Affiliation(s)
- Mark Rudolph
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, USA
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16
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Jenkins DM, Bernhard S. Synthesis and Characterization of Luminescent Bis-Cyclometalated PlatinumIV Complexes. Inorg Chem 2010; 49:11297-308. [DOI: 10.1021/ic100761f] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Dustin M. Jenkins
- Department of Chemistry, Princeton University, Princeton, New Jersey 08540, United States
| | - Stefan Bernhard
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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17
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Fan J, Autschbach J, Ziegler T. Electronic Structure and Circular Dichroism of Tris(bipyridyl) Metal Complexes within Density Functional Theory. Inorg Chem 2010; 49:1355-62. [DOI: 10.1021/ic9011586] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Fan
- Department of Chemistry, University of Calgary, 2500 University Drive, Calgary, Alberta, Canada T2N 1N4
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, 312 Natural Science Complexes, Buffalo, New York 14260-30000
| | - Tom Ziegler
- Department of Chemistry, University of Calgary, 2500 University Drive, Calgary, Alberta, Canada T2N 1N4
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18
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Autschbach J, Nitsch-Velasquez L, Rudolph M. Time-dependent density functional response theory for electronic chiroptical properties of chiral molecules. Top Curr Chem (Cham) 2010; 298:1-98. [PMID: 21321799 DOI: 10.1007/128_2010_72] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Methodology to calculate electronic chiroptical properties from time-dependent density functional theory (TDDFT) is outlined. Applications of TDDFT to computations of electronic circular dichroism, optical rotation, and optical rotatory dispersion are reviewed. Emphasis is put on publications from 2005 to 2010, but much of the older literature is also cited and discussed. The determination of the absolute configuration of chiral molecules by combined measurements and computations is an important application of TDDFT chiroptical methods and discussed in some detail. Raman optical activity (ROA) spectra are obtained from normal-mode derivatives of the optical rotation tensor and other linear response tensors. A few selected (ROA) benchmarks are reviewed.
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Affiliation(s)
- Jochen Autschbach
- Department of Chemistry, University at Buffalo State University of New York, New York, NY, USA.
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19
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Crassous J. Chiral transfer in coordination complexes: towards molecular materials. Chem Soc Rev 2009; 38:830-45. [DOI: 10.1039/b806203j] [Citation(s) in RCA: 347] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Autschbach J. Computing chiroptical properties with first-principles theoretical methods: Background and illustrative examples. Chirality 2009; 21 Suppl 1:E116-52. [DOI: 10.1002/chir.20789] [Citation(s) in RCA: 273] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Fan J, Seth M, Autschbach J, Ziegler T. Circular Dichroism of Trigonal Dihedral Chromium(III) Complexes: A Theoretical Study based on Open-Shell Time-Dependent Density Functional Theory. Inorg Chem 2008; 47:11656-68. [DOI: 10.1021/ic801229c] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jing Fan
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada, T2N 1N4, and Department of Chemistry, University at Buffalo, State University of New York, 312 Natural Science Complexes, Buffalo, New York 14260-30000
| | - Michael Seth
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada, T2N 1N4, and Department of Chemistry, University at Buffalo, State University of New York, 312 Natural Science Complexes, Buffalo, New York 14260-30000
| | - Jochen Autschbach
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada, T2N 1N4, and Department of Chemistry, University at Buffalo, State University of New York, 312 Natural Science Complexes, Buffalo, New York 14260-30000
| | - Tom Ziegler
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada, T2N 1N4, and Department of Chemistry, University at Buffalo, State University of New York, 312 Natural Science Complexes, Buffalo, New York 14260-30000
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22
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Walters RS, Kraml CM, Byrne N, Ho DM, Qin Q, Coughlin FJ, Bernhard S, Pascal RA. Configurationally Stable Longitudinally Twisted Polycyclic Aromatic Compounds. J Am Chem Soc 2008; 130:16435-41. [DOI: 10.1021/ja806958x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert S. Walters
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Lotus Separations, Princeton, New Jersey 08544
| | - Christina M. Kraml
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Lotus Separations, Princeton, New Jersey 08544
| | - Neal Byrne
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Lotus Separations, Princeton, New Jersey 08544
| | - Douglas M. Ho
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Lotus Separations, Princeton, New Jersey 08544
| | - Qian Qin
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Lotus Separations, Princeton, New Jersey 08544
| | - Frederick J. Coughlin
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Lotus Separations, Princeton, New Jersey 08544
| | - Stefan Bernhard
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Lotus Separations, Princeton, New Jersey 08544
| | - Robert A. Pascal
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, and Lotus Separations, Princeton, New Jersey 08544
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23
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McCormick TM, Wang S. Racemic atropisomeric N,N-chelate ligands for recognizing chiral carboxylates via Zn(II) coordination: structure, fluorescence, and circular dichroism. Inorg Chem 2008; 47:10017-24. [PMID: 18831581 DOI: 10.1021/ic801269z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two racemic atropisomeric N,N'-chelate ligands, bis{3,3'-[N-Ph-2-(2'-py)indolyl]} (1) and bis{3,3'-N-4-[N-2-(2'-py)indolyl]phenyl-2-(2'-py)indolyl} (2), have been found to be able to distinguish the enantiomers of Zn((R)-BrMeBu)2 and Zn((S)-BrMeBu)2 where BrMeBu = O2CCH(Br)CHMe2, with a distinct and intense CD spectral response at approximately the 10 microM concentration range. Computational studies established that the (R)-1-Zn((R)-BrMeBu)2 or (S)-1-Zn((S)-BrMeBu)2 diastereomer is more stable than (R)-1-Zn((S)-BrMeBu)2 or (S)-1-Zn((R)-BrMeBu)2. In addition, computational studies showed that the CD spectra of (S)-1-Zn((S)-BrMeBu)2 and (S)-1-Zn((R)-BrMeBu)2 are similar. (1)H NMR spectra confirmed that these two diastereomers exist in solution in about a 2:1 ratio for both complexes of 1 and 2. The distinct CD response of the racemic ligands 1 and 2 toward the chiral zinc(II) carboxylate is therefore attributed to the preferential formation of one diastereomer. The binding modes of the zinc(II) salt with ligands 1 and 2 were established by the crystal structures of the model compounds 1-Zn(tfa)2 and 2-Zn(tfa)2 (tfa = CF3CO2(-)), where the Zn(II) ion is chelated by the two central pyridyl groups in the ligand. Fluorescent titration experiments with various zinc(II) salts showed that the fluorescent spectrum of the atropisomeric ligand displays an anion-dependent change. The zinc(II) binding strength to the N,N'-chelate site of the atropisomeric ligand has been found to play a key role in the selective recognition of different chiral zinc(II) carboxylate derivatives by the racemic atropisomeric ligands.
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Affiliation(s)
- Theresa M McCormick
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
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