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Álvarez D, Menéndez MI, López R. Computational Design of Rhenium(I) Carbonyl Complexes for Anticancer Photodynamic Therapy. Inorg Chem 2022; 61:439-455. [PMID: 34913679 PMCID: PMC8753654 DOI: 10.1021/acs.inorgchem.1c03130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Indexed: 11/28/2022]
Abstract
New Re(I) carbonyl complexes are proposed as candidates for photodynamic therapy after investigating the effects of the pyridocarbazole-type ligand conjugation, addition of substituents to this ligand, and replacement of one CO by phosphines in [Re(pyridocarbazole)(CO)3(pyridine)] complexes by means of the density functional theory (DFT) and time-dependent DFT. We have found, first, that increasing the conjugation in the bidentate ligand reduces the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) energy gap of the complex, so its absorption wavelength red-shifts. When the enlargement of this ligand is carried out by merging the electron-withdrawing 1H-pyrrole-2,5-dione heterocycle, it enhances even more the stabilization of the LUMO due to its electron-acceptor character. Second, the analysis of the shape and composition of the orbitals involved in the band of interest indicates which substituents of the bidentate ligand and which positions are optimal for reducing the HOMO-LUMO energy gap. The introduction of electron-withdrawing substituents into the pyridine ring of the pyridocarbazole ligand mainly stabilizes the LUMO, whereas the HOMO energy increases primarily when electron-donating substituents are introduced into its indole moiety. Each type of substituents results in a bathochromic shift of the lowest-lying absorption band, which is even larger if they are combined in the same complex. Finally, the removal of the π-backbonding interaction between Re and the CO trans to the monodentate pyridine when it is replaced by phosphines PMe3, 1,4-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (DAPTA), and 1,4,7-triaza-9-phosphatricyclo[5.3.2.1]tridecane (CAP) causes another extra bathochromic shift due to the destabilization of the HOMO, which is low with DAPTA, moderate with PMe3, but especially large with CAP. Through the combination of the PMe3 or CAP ligands with adequate electron-withdrawing and/or electron-donating substituents at the pyridocarbazole ligand, we have found several complexes with significant absorption at the therapeutic window. In addition, according to our results on the singlet-triplet energy gap, all of them should be able to produce cytotoxic singlet oxygen.
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Affiliation(s)
- Daniel Álvarez
- Departamento de Química Física
y Analítica, Facultad de Química, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain
| | - M. Isabel Menéndez
- Departamento de Química Física
y Analítica, Facultad de Química, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain
| | - Ramón López
- Departamento de Química Física
y Analítica, Facultad de Química, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain
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2
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Álvarez-García J, García-Lago R, Alonso-Gómez JL, López CS, Cid MM. Accessible triplet excited states in the photoisomerization of allenes with extended conjugation. Dalton Trans 2021; 51:1357-1363. [PMID: 34904605 DOI: 10.1039/d1dt03688b] [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 bidentate allene- and enyne-containing ligands have been synthesized and the photochemical properties of their rhenium(I) complexes have been studied. These complexes exhibit facile isomerization of the conjugated double bonds upon ambient light exposure. Simulations unveiled a very efficient intersystem crossing and the consequent key role of the triplet states in the observed photochemistry of these substrates upon rhenium(I) complexation.
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Affiliation(s)
- Jonathan Álvarez-García
- Departamento de Química Orgánica, Universidade de Vigo, Edificio de Ciencias Experimentais, Campus Lagoas-Marcosende, 36310, Vigo, Spain.
| | - Ramón García-Lago
- Departamento de Química Orgánica, Universidade de Vigo, Edificio de Ciencias Experimentais, Campus Lagoas-Marcosende, 36310, Vigo, Spain.
| | - José Lorenzo Alonso-Gómez
- Departamento de Química Orgánica, Universidade de Vigo, Edificio de Ciencias Experimentais, Campus Lagoas-Marcosende, 36310, Vigo, Spain.
| | - Carlos Silva López
- Departamento de Química Orgánica, Universidade de Vigo, Edificio de Ciencias Experimentais, Campus Lagoas-Marcosende, 36310, Vigo, Spain.
| | - María Magdalena Cid
- Departamento de Química Orgánica, Universidade de Vigo, Edificio de Ciencias Experimentais, Campus Lagoas-Marcosende, 36310, Vigo, Spain.
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Schraff S, Trampert J, Orthaber A, Pammer F. Electronic Properties and Solid-State Packing of Isocyanofulvenes and Their Gold(I) Chloride Complexes. Inorg Chem 2020; 59:17171-17183. [DOI: 10.1021/acs.inorgchem.0c02435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sandra Schraff
- Institute of Organic Chemistry II and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Jens Trampert
- Institute of Organic Chemistry II and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Andreas Orthaber
- Department of Chemistry−Ångström Laboratories, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Frank Pammer
- Institute of Organic Chemistry II and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
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Schraff S, Sun Y, Orthaber A, Pammer F. Gold(I) Complexes of Fulvenyl‐Functionalized Arylisocyanides. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sandra Schraff
- Institute of Organic Chemistry II and Advanced Materials Ulm University Albert‐Einstein‐Allee 11 89081 Ulm Germany
| | - Yu Sun
- Fachbereich Chemie Anorganische Chemie Technische Universität Kaiserslautern Erwin‐Schrödinger‐Strasse 54 67663 Kaiserslautern Germany
| | - Andreas Orthaber
- Department of Chemistry Ångström Laboratories Anorganische Chemie Uppsala University BOX 523 75120 Uppsala Sweden
| | - Frank Pammer
- Institute of Organic Chemistry II and Advanced Materials Ulm University Albert‐Einstein‐Allee 11 89081 Ulm Germany
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5
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Amaral RC, Matos LS, Zanoni KPS, Murakami Iha NY. Photoreversible Molecular Motion of stpyCN Coordinated to fac-[Re(CO)3(NN)]+ Complexes. J Phys Chem A 2018; 122:6071-6080. [DOI: 10.1021/acs.jpca.8b02630] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ronaldo C. Amaral
- Laboratory of Photochemistry and Energy Conversion, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo − USP, Avenue Prof. Lineu Prestes, 748, 05508-000, São Paulo, SP, Brazil
| | - Lais S. Matos
- Laboratory of Photochemistry and Energy Conversion, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo − USP, Avenue Prof. Lineu Prestes, 748, 05508-000, São Paulo, SP, Brazil
| | - Kassio P. S. Zanoni
- Laboratory of Photochemistry and Energy Conversion, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo − USP, Avenue Prof. Lineu Prestes, 748, 05508-000, São Paulo, SP, Brazil
| | - Neyde Y. Murakami Iha
- Laboratory of Photochemistry and Energy Conversion, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo − USP, Avenue Prof. Lineu Prestes, 748, 05508-000, São Paulo, SP, Brazil
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Photochemical properties of a Re(I) polymer containing dppz in its structure. An interplay between dark and bright states of dppz. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.11.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Norouzi-Arasi H, Pal AK, Nag S, Chartrand D, Hanan GS. Synthesis and photophysical properties of C 3-symmetric tris(pyridyl)truxene scaffolds of Ru(ii) and Re(i). Chem Commun (Camb) 2016; 52:12159-12162. [PMID: 27711311 DOI: 10.1039/c6cc06496e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Facial Ru(ii)- and Re(i)-complexes of a novel face-capping tris(pyridyl)truxene ligand were synthesised and characterised by various analytical techniques including single crystal XRD. The Ru(ii) complex exhibits unusual green phosphorescence with a long excited-state lifetime.
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Affiliation(s)
- Hassan Norouzi-Arasi
- Département de Chimie, Université de Montréal, Montréal, Québec H3T 1J4, Canada.
| | - Amlan K Pal
- Département de Chimie, Université de Montréal, Montréal, Québec H3T 1J4, Canada.
| | - Samik Nag
- Département de Chimie, Université de Montréal, Montréal, Québec H3T 1J4, Canada. and Department of Chemistry, Acharya Prafulla Chandra Roy Government College, Himachal Bihar, Matigara, Silguri-734010, West Bengal, India
| | - Daniel Chartrand
- Département de Chimie, Université de Montréal, Montréal, Québec H3T 1J4, Canada.
| | - Garry S Hanan
- Département de Chimie, Université de Montréal, Montréal, Québec H3T 1J4, Canada.
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Gómez-Iglesias P, Guyon F, Khatyr A, Ulrich G, Knorr M, Martín-Alvarez JM, Miguel D, Villafañe F. Luminescent rhenium(I) tricarbonyl complexes with pyrazolylamidino ligands: photophysical, electrochemical, and computational studies. Dalton Trans 2015; 44:17516-28. [PMID: 26389827 DOI: 10.1039/c5dt02793d] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
New pyrazolylamidino complexes fac-[ReCl(CO)3(NH[double bond, length as m-dash]C(Me)pz*-κ(2)N,N)] (pz*H = pyrazole, pzH; 3,5-dimethylpyrazole, dmpzH; indazole, indzH) and fac-[ReBr(CO)3(NH[double bond, length as m-dash]C(Ph)pz*-κ(2)N,N)] are synthesized via base-catalyzed coupling of the appropriate nitrile with pyrazole, or via metathesis by halide abstraction with AgBF4 from a bromido pyrazolylamidino complex and the subsequent addition of LiCl. In order to study both the influence of the substituents present at the pyrazolylamidino ligand, and that of the "sixth" ligand in the complex, photophysical, electrochemical, and computational studies have been carried out on this series and other complexes previously described by us, of the general formula fac-[ReL(CO)3(NH[double bond, length as m-dash]C(R')pz*-κ(2)N,N)](n+) (L = Cl, Br; R' = Me, Ph, n = 0; or L = NCMe, dmpzH, indzH, R' = Me, n = 1). All complexes exhibit phosphorescent decays from a prevalently (3)MLCT excited state with quantum yields (Φ) in the range between 0.007 and 0.039, and long lifetimes (τ∼ 8-1900 ns). The electrochemical study reveals irreversible reduction for all complexes. The oxidation of the neutral complexes was found to be irreversible due to halido-dissociation, whereas the cationic species display a reversible process implying the ReI/ReII couple. Density functional and time-dependent density functional theory (TD-DFT) calculations provide a reasonable trend for the values of emission energies in line with the experimental photophysical data, supporting the (3)MLCT based character of the emissions.
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Affiliation(s)
- Patricia Gómez-Iglesias
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain.
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9
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Martinez Saavedra HH, Ragone F, Ruiz GT, Gara PMD, Wolcan E. Solvent Dependent Switching of 3MLLCT and 1IL Luminescent States in [ClRe(CO)3(Bathocuproinedisulfonate)]2–: Spectroscopic and Computational Study. J Phys Chem A 2014; 118:9661-74. [DOI: 10.1021/jp506890r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Hector H. Martinez Saavedra
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, UNLP, CCT La Plata-CONICET), Diag. 113 y 64, Sucursal 4, C.C. 16, (B1906ZAA) La Plata, Argentina
| | - Fabricio Ragone
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, UNLP, CCT La Plata-CONICET), Diag. 113 y 64, Sucursal 4, C.C. 16, (B1906ZAA) La Plata, Argentina
| | - Gustavo T. Ruiz
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, UNLP, CCT La Plata-CONICET), Diag. 113 y 64, Sucursal 4, C.C. 16, (B1906ZAA) La Plata, Argentina
| | - Pedro M. David Gara
- Centro de Investigaciones Ópticas (CONICET-CIC) and UNLP, Cno. Centenario e/505 y 508, C.C.
3 (1897), La Plata, Argentina
| | - Ezequiel Wolcan
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, UNLP, CCT La Plata-CONICET), Diag. 113 y 64, Sucursal 4, C.C. 16, (B1906ZAA) La Plata, Argentina
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Wolcan E. On the origins of the absorption spectroscopy of pterin and Re(CO)3(pterin)(H2O) aqueous solutions. A combined theoretical and experimental study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 129:173-183. [PMID: 24727177 DOI: 10.1016/j.saa.2014.03.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 03/10/2014] [Accepted: 03/16/2014] [Indexed: 06/03/2023]
Abstract
The origins of the absorption spectroscopy of pterin and Re(CO)3(pterin)(H2O) complex as a function of pH is studied using the hybrid functional B3LYP and PBE0 in combination with 6-311++G(d,p) and LanL2TZ(f) basis sets. A natural bond analysis was performed to the principal molecular orbitals involved in the electronic transitions of the studied compounds. The low energy band of pterin, which is described as a H→L electronic transition, can be interpreted as an admixture of π→π(*), n→π(*) and n→n electronic transitions involving π(C2-N1, C6-N5, C9-C10) and n(C2) orbitals of the HOMO and π(*)(C6-N5, C7-N8) and n(C4) orbitals of the LUMO. The low energy band of Re(CO)3(pterin)(H2O) can be described as a combination of different MLLCT transitions where electron density residing on different π orbitals of carbonyl-Re bonds and lone pairs of Re is transferred to pterin moiety. Besides MLLCT transitions, IL, LLCT and LLMCT transitions contribute the absorptions of the Re(I) complex in the wavelength region corresponding to the high energy bands. The calculated electronic spectra of the acid and base forms of pterin and Re(CO)3(pterin)(H2O) were simulated from the theoretical results and compared to the experimental absorption spectra with great accuracy both in position and relative intensities of the absorption bands.
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Affiliation(s)
- Ezequiel Wolcan
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, UNLP, CCT La Plata-CONICET), Diag. 113 y 64, (B1906ZAA) La Plata, Argentina.
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11
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Pal AK, Hanan GS. Structural, electrochemical and photophysical investigations of Re(i)-complexes of κ3N-tridentate heterocyclic ligands. Dalton Trans 2014; 43:11811-4. [DOI: 10.1039/c4dt01454e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Yempally V, Kyran SJ, Raju RK, Fan WY, Brothers EN, Darensbourg DJ, Bengali AA. Thermal and Photochemical Reactivity of Manganese Tricarbonyl and Tetracarbonyl Complexes with a Bulky Diazabutadiene Ligand. Inorg Chem 2014; 53:4081-8. [DOI: 10.1021/ic500025k] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | - Samuel J. Kyran
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Rajesh K. Raju
- Department of Chemistry, Texas A&M University at Qatar, Doha, Qatar
| | - Wai Yip Fan
- Department of Chemistry, National University of Singapore, Kent Ridge, Singapore 119077
| | | | - Donald J. Darensbourg
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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Chartrand D, Hanan GS. Rhodium Amidinate Dimers as Structural and Functional Hubs for Multimetallic Assemblies. Inorg Chem 2013; 53:624-36. [DOI: 10.1021/ic4024585] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Daniel Chartrand
- Department
of Chemistry, Université de Montréal, Montréal, Quebec, H3T 1J4 Canada
| | - Garry S. Hanan
- Department
of Chemistry, Université de Montréal, Montréal, Quebec, H3T 1J4 Canada
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Martinez Saavedra HH, Franca CA, Petroselli G, Erra-Balsells R, Ruiz GT, Wolcan E. A new zwitterionic, water soluble, Re(I) complex: Synthesis, spectroscopic and computational characterization. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.08.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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