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Gogesch F, Laininger LS, Sokov N, Schupp SM, Senft L, Moura HM, Linseis M, Schmidt-Mende L, Ivanović-Burmazović I, Unterlass MM, Winter RF. A Dibenzotetrathiafulvalene-Bridged Bis(alkenylruthenium) Complex and Its One- and Two-Electron-Oxidized Forms. Inorg Chem 2023; 62:18789-18803. [PMID: 37921553 PMCID: PMC10664072 DOI: 10.1021/acs.inorgchem.3c03184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/09/2023] [Accepted: 10/17/2023] [Indexed: 11/04/2023]
Abstract
We report on the synthesis of the new bis(alkenylruthenium) complex DBTTF-(ViRu)2 with a longitudinally extended, π-conjugated dibenzotetrathiafulvalene (DBTTF) bridge, characterized by multinuclear NMR, IR, and UV/vis spectroscopy, mass spectrometry, and single-crystal X-ray diffraction. Cyclic and square-wave voltammetry revealed that DBTTF-(ViRu)2 undergoes four consecutive oxidations. IR, UV/vis/near-IR, and electron paramagnetic resonance spectroscopy indicate that the first oxidation involves the redox-noninnocent DBTTF bridge, while the second oxidation is biased toward one of the peripheral styrylruthenium entities, thereby generating an electronically coupled mixed-valent state ({Ru}-CH═CH)•+-DBTTF•+-(CH═CH-{Ru}) [{Ru} = Ru(CO)Cl(PiPr3)2]. The latter is apparently in resonance with the ({Ru}-CH═CH)•+-DBTTF-(CH═CH-{Ru})•+ and ({Ru}-CH═CH)-DBTTF2+-(CH═CH-{Ru}) forms, which are calculated to lie within 19 kJ/mol. Higher oxidized forms proved too unstable for further characterization. The reaction of DBTTF-(ViRu)2 with the strong organic acceptors 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, tetracyano-p-benzoquinodimethane (TCNQ), and F4TCNQ resulted in formation of the DBTTF-(ViRu)2•+ radical cation, as shown by various spectroscopic techniques. Solid samples of these compounds were found to be highly amorphous and electrically insulating.
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Affiliation(s)
- Franciska
S. Gogesch
- Fachbereich
Chemie Universität Konstanz Universitätsstraße 10, 78457 Kostanz, Germany
| | - Lukas S. Laininger
- Fachbereich
Chemie Universität Konstanz Universitätsstraße 10, 78457 Kostanz, Germany
| | - Nick Sokov
- Fachbereich
Chemie Universität Konstanz Universitätsstraße 10, 78457 Kostanz, Germany
| | - Stefan M. Schupp
- Universität
Konstanz Universitätsstraße
10, 78457 Konstanz, Germany
| | - Laura Senft
- Department
Chemie Ludwig-Maximilians-Universität
München Butenandstraße 5−13, Haus D, 81377 München, Germany
| | - Hipassia M. Moura
- Fachbereich
Chemie Universität Konstanz Universitätsstraße 10, 78457 Kostanz, Germany
| | - Michael Linseis
- Fachbereich
Chemie Universität Konstanz Universitätsstraße 10, 78457 Kostanz, Germany
| | | | - Ivana Ivanović-Burmazović
- Department
Chemie Ludwig-Maximilians-Universität
München Butenandstraße 5−13, Haus D, 81377 München, Germany
| | - Miriam M. Unterlass
- Fachbereich
Chemie Universität Konstanz Universitätsstraße 10, 78457 Kostanz, Germany
| | - Rainer F. Winter
- Fachbereich
Chemie Universität Konstanz Universitätsstraße 10, 78457 Kostanz, Germany
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2
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Hart SM, Banal JL, Castellanos MA, Markova L, Vyborna Y, Gorman J, Häner R, Willard AP, Bathe M, Schlau-Cohen GS. Activating charge-transfer state formation in strongly-coupled dimers using DNA scaffolds. Chem Sci 2022; 13:13020-13031. [PMID: 36425503 PMCID: PMC9667922 DOI: 10.1039/d2sc02759c] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 10/04/2022] [Indexed: 09/16/2023] Open
Abstract
Strongly-coupled multichromophoric assemblies orchestrate the absorption, transport, and conversion of photonic energy in natural and synthetic systems. Programming these functionalities involves the production of materials in which chromophore placement is precisely controlled. DNA nanomaterials have emerged as a programmable scaffold that introduces the control necessary to select desired excitonic properties. While the ability to control photophysical processes, such as energy transport, has been established, similar control over photochemical processes, such as interchromophore charge transfer, has not been demonstrated in DNA. In particular, charge transfer requires the presence of close-range interchromophoric interactions, which have a particularly steep distance dependence, but are required for eventual energy conversion. Here, we report a DNA-chromophore platform in which long-range excitonic couplings and short-range charge-transfer couplings can be tailored. Using combinatorial screening, we discovered chromophore geometries that enhance or suppress photochemistry. We combined spectroscopic and computational results to establish the presence of symmetry-breaking charge transfer in DNA-scaffolded squaraines, which had not been previously achieved in these chromophores. Our results demonstrate that the geometric control introduced through the DNA can access otherwise inaccessible processes and program the evolution of excitonic states of molecular chromophores, opening up opportunities for designer photoactive materials for light harvesting and computation.
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Affiliation(s)
- Stephanie M Hart
- Department of Chemistry, Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - James L Banal
- Department of Biological Engineering, Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Maria A Castellanos
- Department of Chemistry, Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Larysa Markova
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3, CH-3012 Bern Switzerland
| | - Yuliia Vyborna
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3, CH-3012 Bern Switzerland
| | - Jeffrey Gorman
- Department of Biological Engineering, Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Robert Häner
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3, CH-3012 Bern Switzerland
| | - Adam P Willard
- Department of Chemistry, Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Mark Bathe
- Department of Biological Engineering, Massachusetts Institute of Technology Cambridge MA 02139 USA
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Breimaier S, Fröhlich N, Herberger J, Linseis M, Kivala M, Winter RF. Charge and Spin Delocalization in Mixed-Valent Vinylruthenium–Triarylamine-Conjugates with Planarized Triarylamines. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefanie Breimaier
- Department of Chemistry, University of Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Nina Fröhlich
- Department of Chemistry and Pharmacy, Friedrich−Alexander-Universität Erlangen−Nürnberg, Nicolaus-Fiebiger-Straße 10, D-91058 Erlangen, Germany
| | - Jan Herberger
- Department of Chemistry, University of Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Michael Linseis
- Department of Chemistry, University of Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Milan Kivala
- Institute of Organic Chemistry, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
| | - Rainer F. Winter
- Department of Chemistry, University of Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
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4
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Corrente GA, Parisi F, Maltese V, Cospito S, Imbardelli D, La Deda M, Beneduci A. Panchromatic Fluorescence Emission from Thienosquaraines Dyes: White Light Electrofluorochromic Devices. Molecules 2021; 26:molecules26226818. [PMID: 34833911 PMCID: PMC8621610 DOI: 10.3390/molecules26226818] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/02/2021] [Accepted: 11/09/2021] [Indexed: 11/16/2022] Open
Abstract
Electrofluorochromic devices (EFCDs) that allow the modulation of the light emitted by electroactive fluorophores are very attractive in the research field of optoelectronics. Here, the electrofluorochromic behaviour of a series of squaraine dyes was studied for the first time. In solutions, all compounds are photoluminescent with maxima located in the range 665-690 nm, characterized by quantum yields ranging from 30% to 4.1%. Squaraines were incorporated in a polymer gel used as an active layer in all-in-one gel switchable EFCDs. An aggregation induced quenching occurs in the gel phase, causing a significant decrease in the emission quantum yield in the device. However, the squaraines containing the thieno groups (thienosquaraines, TSQs) show a panchromatic emission and their electrofluorochromism allows the tuning of the fluorescence intensity from 500 nm to the near infrared. Indeed, the application of a potential difference to the device induces a reversible quenching of their emission that is significantly higher and occurs at shorter switching times for TSQs-based devices compared to the reference squaraine dye (DIBSQ). Interestingly, the TSQs fluorescence spectral profile becomes more structured under voltage, and this could be explained by the shift of the aggregates/monomer equilibrium toward the monomeric species, due to electrochemical oxidation, which causes the disassembling of aggregates. This effect may be used to modulate the colour of the fluorescence light emitted by a device and paves the way for conceiving new electrofluorochromic materials based on this mechanism.
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Affiliation(s)
- Giuseppina Anna Corrente
- Laboratory of Physical Chemistry, Materials and Processes for Industry, Environment and Cultural Heritage, Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 15D, 87036 Arcavacata di Rende, Italy; (G.A.C.); (V.M.); (S.C.); (D.I.)
| | - Francesco Parisi
- Laboratory of Inorganic Molecular Materials, Department of Chemistry and Chemical Technologies, Institute of Nanotechnology CNR-Nanotec, University of Calabria, Via P. Bucci, Cubo 14C, 87036 Arcavacata di Rende, Italy; (F.P.); (M.L.D.)
| | - Vito Maltese
- Laboratory of Physical Chemistry, Materials and Processes for Industry, Environment and Cultural Heritage, Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 15D, 87036 Arcavacata di Rende, Italy; (G.A.C.); (V.M.); (S.C.); (D.I.)
| | - Sante Cospito
- Laboratory of Physical Chemistry, Materials and Processes for Industry, Environment and Cultural Heritage, Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 15D, 87036 Arcavacata di Rende, Italy; (G.A.C.); (V.M.); (S.C.); (D.I.)
| | - Daniela Imbardelli
- Laboratory of Physical Chemistry, Materials and Processes for Industry, Environment and Cultural Heritage, Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 15D, 87036 Arcavacata di Rende, Italy; (G.A.C.); (V.M.); (S.C.); (D.I.)
| | - Massimo La Deda
- Laboratory of Inorganic Molecular Materials, Department of Chemistry and Chemical Technologies, Institute of Nanotechnology CNR-Nanotec, University of Calabria, Via P. Bucci, Cubo 14C, 87036 Arcavacata di Rende, Italy; (F.P.); (M.L.D.)
| | - Amerigo Beneduci
- Laboratory of Physical Chemistry, Materials and Processes for Industry, Environment and Cultural Heritage, Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 15D, 87036 Arcavacata di Rende, Italy; (G.A.C.); (V.M.); (S.C.); (D.I.)
- Correspondence:
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5
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Rotthowe N, Linseis M, Vogelsang L, Orth N, Ivanović-Burmazović I, Winter RF. A "Pretender" Croconate-Bridged Macrocyclic Tetraruthenium Complex: Sizable Redox Potential Splittings despite Electronically Insulated Divinylphenylene Diruthenium Entities. Molecules 2021; 26:molecules26175232. [PMID: 34500666 PMCID: PMC8433806 DOI: 10.3390/molecules26175232] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/24/2021] [Accepted: 08/24/2021] [Indexed: 11/17/2022] Open
Abstract
Careful optimization of the reaction conditions provided access to the particularly small tetraruthenium macrocycle 2Ru2Ph-Croc, which is composed out of two redox-active divinylphenylene-bridged diruthenium entities {Ru}-1,4-CH=CH-C6H4-CH=CH-{Ru} (Ru2Ph; {Ru} = Ru(CO)Cl(PiPr3)2) and two likewise redox-active and potentially non-innocent croconate linkers. According to single X-ray diffraction analysis, the central cavity of 2Ru2Ph-Croc is shielded by the bulky PiPr3 ligands, which come into close contact. Cyclic voltammetry revealed two pairs of split anodic waves in the weakly ion pairing CH2Cl2/NBu4BArF24 (BArF24 = [B{C6H3(CF3)2-3,5}4]− electrolyte, while the third and fourth waves fall together in CH2Cl2/NBu4PF6. The various oxidized forms were electrogenerated and scrutinized by IR and UV/Vis/NIR spectroscopy. This allowed us to assign the individual oxidations to the metal-organic Ru2Ph entities within 2Ru2Ph-Croc, while the croconate ligands remain largely uninvolved. The lack of specific NIR bands that could be assigned to intervalence charge transfer (IVCT) in the mono- and trications indicates that these mixed-valent species are strictly charge-localized. 2Ru2Ph-Croc is hence an exemplary case, where stepwise IR band shifts and quite sizable redox splittings between consecutive one-electron oxidations would, on first sight, point to electronic coupling, but are exclusively due to electrostatic and inductive effects. This makes 2Ru2Ph-Croc a true “pretender”.
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Affiliation(s)
- Nils Rotthowe
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 31, 78464 Konstanz, Germany; (N.R.); (M.L.); (L.V.)
- Department of Chemistry, University of Southern California, LJS 251, 840 Downey Way, Los Angeles, CA 90089, USA
| | - Michael Linseis
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 31, 78464 Konstanz, Germany; (N.R.); (M.L.); (L.V.)
| | - Lars Vogelsang
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 31, 78464 Konstanz, Germany; (N.R.); (M.L.); (L.V.)
| | - Nicole Orth
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany; (N.O.); (I.I.-B.)
| | - Ivana Ivanović-Burmazović
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany; (N.O.); (I.I.-B.)
- Department Chemie, Ludwigs-Maximilians-Universität München, Butenandtstr. 5-13, Haus D, 81377 München, Germany
| | - Rainer F. Winter
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 31, 78464 Konstanz, Germany; (N.R.); (M.L.); (L.V.)
- Correspondence: ; Tel.: +49-(7531)-88-5355
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6
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Hassenrück C, Azarkh M, Drescher M, Linseis M, Demeshko S, Meyer F, Winter RF. Redox Isomeric Ferrocenyl Styrylruthenium Radical Cations with Diphenyl-Substituted β-Ketoenolato Ligands. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00714] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christopher Hassenrück
- Universität Konstanz, Fachbereich Chemie, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Mykhailo Azarkh
- Universität Konstanz, Fachbereich Chemie, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Malte Drescher
- Universität Konstanz, Fachbereich Chemie, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Michael Linseis
- Universität Konstanz, Fachbereich Chemie, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Serhiy Demeshko
- Georg-August-Universität Göttingen, Institut für Anorganische Chemie, Tammannstraße 4, D-37077 Göttingen, Germany
| | - Franc Meyer
- Georg-August-Universität Göttingen, Institut für Anorganische Chemie, Tammannstraße 4, D-37077 Göttingen, Germany
| | - Rainer F. Winter
- Universität Konstanz, Fachbereich Chemie, Universitätsstraße 10, D-78457 Konstanz, Germany
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7
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Ávila-Costa M, Donnici CL, Dos Santos JD, Diniz R, Barros-Barbosa A, Cuin A, de Oliveira LFC. Synthesis, vibrational spectroscopy and X-ray structural characterization of novel NIR emitter squaramides. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 223:117354. [PMID: 31323496 DOI: 10.1016/j.saa.2019.117354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/02/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
Two new 2-naphthyl squaramides, 3-methoxy -4-(2-naphtalenylamino)-3-cyclobutene-1,2-dione (SQ-NPh1) and bis-3,4-(2-naphtalenylamino)-3-cyclobutene-1,2-dione (SQ-NPh2) were synthesized via condensation reaction between the dimethylsquarate and 2-naphthylamine. The spectrometric characterization by 13C NMR confirmed the obtaining of the squaramide derivative and nor the squaraine analog. This hypothesis was corroborated by Raman and Infrared spectroscopy since the characteristic vibrational bands related to the oxocarbon portion of both structures have been assigned, such as the ones for SQ-NPh1 and SQ-NPh2. The single-crystal X-ray crystallography for SQ-NPh1 crystal structures have been solved and the structure of SQ-NPh2 have been refined using Powder Diffraction state-of-art. The SQ-NPh1 crystallizes in monoclinic system in P2/c space group. Both squaramides present absorption in the ultra-visible (220-370 nm) and fluorescent emission in the near-infrared (780-800 nm), besides they also presented high thermal stability (around 570 °C). Generally, only squaraines are reported as NIR emitters, this is the first description of NIR emission for squaramides, and since the synthesis of squaramides is very easy and the rational design of small-molecule NIR fluorophores is of high priority and great value, these results are very promising for the development of novel NIR fluorescent dyes.
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Affiliation(s)
- Marina Ávila-Costa
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Claudio L Donnici
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Jordana Dias Dos Santos
- Núcleo de Espectroscopia e Estrutura Molecular, Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG 36036-900, Brazil
| | - Renata Diniz
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Alexandre Barros-Barbosa
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Alexandre Cuin
- Núcleo de Espectroscopia e Estrutura Molecular, Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG 36036-900, Brazil
| | - Luiz Fernando Cappa de Oliveira
- Núcleo de Espectroscopia e Estrutura Molecular, Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG 36036-900, Brazil
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8
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Zhu S, Tian R, Antaris AL, Chen X, Dai H. Near-Infrared-II Molecular Dyes for Cancer Imaging and Surgery. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1900321. [PMID: 31025403 PMCID: PMC6555689 DOI: 10.1002/adma.201900321] [Citation(s) in RCA: 484] [Impact Index Per Article: 96.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/03/2019] [Indexed: 05/05/2023]
Abstract
Fluorescence bioimaging affords a vital tool for both researchers and surgeons to molecularly target a variety of biological tissues and processes. This review focuses on summarizing organic dyes emitting at a biological transparency window termed the near-infrared-II (NIR-II) window, where minimal light interaction with the surrounding tissues allows photons to travel nearly unperturbed throughout the body. NIR-II fluorescence imaging overcomes the penetration/contrast bottleneck of imaging in the visible region, making it a remarkable modality for early diagnosis of cancer and highly sensitive tumor surgery. Due to their convenient bioconjugation with peptides/antibodies, NIR-II molecular dyes are desirable candidates for targeted cancer imaging, significantly overcoming the autofluorescence/scattering issues for deep tissue molecular imaging. To promote the clinical translation of NIR-II bioimaging, advancements in the high-performance small molecule-derived probes are critically important. Here, molecules with clinical potential for NIR-II imaging are discussed, summarizing the synthesis and chemical structures of NIR-II dyes, chemical and optical properties of NIR-II dyes, bioconjugation and biological behavior of NIR-II dyes, whole body imaging with NIR-II dyes for cancer detection and surgery, as well as NIR-II fluorescence microscopy imaging. A key perspective on the direction of NIR-II molecular dyes for cancer imaging and surgery is also discussed.
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Affiliation(s)
- Shoujun Zhu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Rui Tian
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | | | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Hongjie Dai
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
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9
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Garoz‐Ruiz J, Perales‐Rondon JV, Heras A, Colina A. Spectroelectrochemical Sensing: Current Trends and Challenges. ELECTROANAL 2019. [DOI: 10.1002/elan.201900075] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jesus Garoz‐Ruiz
- Department of ChemistryUniversidad de Burgos Pza. Misael Bañuelos s/n E-09001 Burgos Spain
| | | | - Aranzazu Heras
- Department of ChemistryUniversidad de Burgos Pza. Misael Bañuelos s/n E-09001 Burgos Spain
| | - Alvaro Colina
- Department of ChemistryUniversidad de Burgos Pza. Misael Bañuelos s/n E-09001 Burgos Spain
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10
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Kovalski E, Korb M, Hildebrandt A. Synthesis, Electrochemistry, and Optical Properties of Half‐Sandwich Ruthenium Complexes Bearing Triarylamine‐Anthracenes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701409] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Eduard Kovalski
- Technische Universität Chemnitz Fakultät für Naturwissenschaften Institut für Chemie Anorganische Chemie 09107 Chemnitz Germany
| | - Marcus Korb
- Technische Universität Chemnitz Fakultät für Naturwissenschaften Institut für Chemie Anorganische Chemie 09107 Chemnitz Germany
| | - Alexander Hildebrandt
- Technische Universität Chemnitz Fakultät für Naturwissenschaften Institut für Chemie Anorganische Chemie 09107 Chemnitz Germany
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11
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Hassenrück C, Winter RF. Manipulation and Assessment of Charge and Spin Delocalization in Mixed-Valent Triarylamine–Vinylruthenium Conjugates. Inorg Chem 2017; 56:13517-13529. [PMID: 29035518 DOI: 10.1021/acs.inorgchem.7b02186] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Rainer F. Winter
- University of Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
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12
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Klein J, Stuckmann A, Sobottka S, Suntrup L, van der Meer M, Hommes P, Reissig HU, Sarkar B. Ruthenium Complexes with Strongly Electron-Donating Terpyridine Ligands: Effect of the Working Electrode on Electrochemical and Spectroelectrochemical Properties. Chemistry 2017; 23:12314-12325. [DOI: 10.1002/chem.201701431] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Indexed: 01/28/2023]
Affiliation(s)
- Johannes Klein
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Alexandra Stuckmann
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Sebastian Sobottka
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Lisa Suntrup
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Margarethe van der Meer
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Paul Hommes
- Institut für Chemie und Biochemie; Organische Chemie; Freie Universität Berlin; Takustraße 3 14195 Berlin Germany
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie; Organische Chemie; Freie Universität Berlin; Takustraße 3 14195 Berlin Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
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13
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Oßwald S, Breimaier S, Linseis M, Winter RF. Polyelectrochromic Vinyl Ruthenium-Modified Tritylium Dyes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00194] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steffen Oßwald
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Stefanie Breimaier
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Michael Linseis
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Rainer F. Winter
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
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14
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Oxidized Styrylruthenium–Ferrocene Conjugates: From Valence Localization to Valence Tautomerism. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600776] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Homo- and heterobimetallic 1,4-divinylphenylene- and naphthalene-1,8-divinyl-bridged diruthenium, diosmium and ruthenium osmium complexes. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.02.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Maltese V, Cospito S, Beneduci A, De Simone BC, Russo N, Chidichimo G, Janssen RAJ. Electro-optical Properties of Neutral and Radical Ion Thienosquaraines. Chemistry 2016; 22:10179-86. [PMID: 27334359 DOI: 10.1002/chem.201601281] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Indexed: 01/01/2023]
Abstract
Thienosquaraines are an interesting class of electroactive dyes that are useful for applications in organic electronics. Herein, the redox chemistry and electrochromic response of a few newly synthesized thienosquaraines are presented. These properties are compared to those of the commercial 2,4-bis[4-(N,N-diisobutylamino)-2,6-dihydroxyphenyl]squaraine. The stability of the radical ions formed in electrochemical processes strongly affects these properties, as shown by cyclic voltammetry, in situ spectroelectrochemistry, and quantum chemical calculations. Furthermore, all of the dyes show aggregation tendency resulting in panchromatic absorption covering the whole UV/Vis spectral range.
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Affiliation(s)
- Vito Maltese
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Arcavacata di Rende (CS), 87036, Italy. .,Molecular Materials and Nanosystems, Institute for Complex Molecular Systems, Eindhoven University of Technology, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands.
| | - Sante Cospito
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Arcavacata di Rende (CS), 87036, Italy
| | - Amerigo Beneduci
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Arcavacata di Rende (CS), 87036, Italy.
| | - Bruna Clara De Simone
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Arcavacata di Rende (CS), 87036, Italy
| | - Nino Russo
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Arcavacata di Rende (CS), 87036, Italy
| | - Giuseppe Chidichimo
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Arcavacata di Rende (CS), 87036, Italy
| | - René A J Janssen
- Molecular Materials and Nanosystems, Institute for Complex Molecular Systems, Eindhoven University of Technology, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
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17
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Serpe L, Ellena S, Barbero N, Foglietta F, Prandini F, Gallo MP, Levi R, Barolo C, Canaparo R, Visentin S. Squaraines bearing halogenated moieties as anticancer photosensitizers: Synthesis, characterization and biological evaluation. Eur J Med Chem 2016; 113:187-97. [PMID: 26942626 DOI: 10.1016/j.ejmech.2016.02.035] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 02/12/2016] [Accepted: 02/13/2016] [Indexed: 11/30/2022]
Abstract
We report the synthesis and characterization of a series of symmetrical indolenine-based squaraine dyes along with the evaluation of their singlet oxygen generation efficiency. The photodynamic activity of these new photosensitizers has been evaluated on a human tumor fibrosarcoma (HT-1080) cell line. The cytotoxicity increased over time and is induced by the photoactivation of bromo (Br-C4) and iodio (I-C4) long carbon chain squaraine dyes and the consequent increase in reactive oxygen species (ROS) production (p < 0.001), which leads to necrosis 6 h after treatment. Induction of cytochrome c release, DNA damage and up-regulation of GPX1, NQO1 and SOD2 mRNA gene expression after PDT were investigated.
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Affiliation(s)
- Loredana Serpe
- University of Torino, Department of Drug Science and Technology, Via Pietro Giuria 13, 10125 Torino, Italy
| | - Silvano Ellena
- University of Torino, Department of Chemistry and NIS Interdepartmental Centre, Via Pietro Giuria 7, 10125 Torino, Italy
| | - Nadia Barbero
- University of Torino, Department of Chemistry and NIS Interdepartmental Centre, Via Pietro Giuria 7, 10125 Torino, Italy.
| | - Federica Foglietta
- University of Torino, Department of Drug Science and Technology, Via Pietro Giuria 13, 10125 Torino, Italy
| | - Federica Prandini
- University of Torino, Department of Drug Science and Technology, Via Pietro Giuria 13, 10125 Torino, Italy
| | - Maria Pia Gallo
- University of Torino, Department of Life Sciences and Systems Biology, Via Accademia Albertina 13, 10123 Torino, Italy
| | - Renzo Levi
- University of Torino, Department of Life Sciences and Systems Biology, Via Accademia Albertina 13, 10123 Torino, Italy
| | - Claudia Barolo
- University of Torino, Department of Chemistry and NIS Interdepartmental Centre, Via Pietro Giuria 7, 10125 Torino, Italy
| | - Roberto Canaparo
- University of Torino, Department of Drug Science and Technology, Via Pietro Giuria 13, 10125 Torino, Italy
| | - Sonja Visentin
- University of Torino, Department of Molecular Biotechnology and Health Science, Via Quarello15, 10135 Torino, Italy
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18
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Toscani A, Marín-Hernández C, Moragues ME, Sancenón F, Dingwall P, Brown NJ, Martínez-Máñez R, White AJP, Wilton-Ely JDET. Ruthenium(II) and Osmium(II) Vinyl Complexes as Highly Sensitive and Selective Chromogenic and Fluorogenic Probes for the Sensing of Carbon Monoxide in Air. Chemistry 2015; 21:14529-38. [DOI: 10.1002/chem.201501843] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Indexed: 01/28/2023]
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19
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Abdel-Rahman OS, Maurer J, Záliš S, Winter RF. Ruthenium Styryl Complexes with Ligands Derived from 2-Hydroxy- and 2-Mercaptopyridine and 2-Hydroxy- and 2-Mercaptoquinoline. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00401] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Obadah S. Abdel-Rahman
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße
10, D-78457 Konstanz, Germany
| | - Jörg Maurer
- Institut für Anorganische Chemie der Universität Regensburg, Universitätsstraße 31, D-93040 Regensburg, Germany
| | - Stanislav Záliš
- J. Heyrovský Institute of Physical Chemistry v.
v. i., Academy of Sciences of the Czech Republic, Dolejškova
3, 18223 Prague, Czech Republic
| | - Rainer F. Winter
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße
10, D-78457 Konstanz, Germany
- Institut für Anorganische Chemie der Universität Regensburg, Universitätsstraße 31, D-93040 Regensburg, Germany
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20
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Scheerer S, Rotthowe N, Abdel-Rahman OS, He X, Rigaut S, Kvapilová H, Záliš S, Winter RF. Vinyl Ruthenium-Modified Biphenyl and 2,2′-Bipyridines. Inorg Chem 2015; 54:3387-402. [DOI: 10.1021/ic503075e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Stefan Scheerer
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78453 Konstanz, Germany
| | - Nils Rotthowe
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78453 Konstanz, Germany
| | - Obadah S. Abdel-Rahman
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78453 Konstanz, Germany
| | - Xiaoyan He
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, F-35042, Rennes Cedex, France
| | - Stéphane Rigaut
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, F-35042, Rennes Cedex, France
| | - Hana Kvapilová
- J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-18223 Prague, Czech Republic
| | - Stanislav Záliš
- J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-18223 Prague, Czech Republic
| | - Rainer F. Winter
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78453 Konstanz, Germany
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21
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Lambert C, Scherpf T, Ceymann H, Schmiedel A, Holzapfel M. Coupled Oscillators for Tuning Fluorescence Properties of Squaraine Dyes. J Am Chem Soc 2015; 137:3547-57. [DOI: 10.1021/ja512338w] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Christoph Lambert
- Institut für Organische Chemie, Universität Würzburg, Wilhelm Conrad Röntgen Research
Center for Complex Material Systems, Center for Nanosystems Chemistry,
Am Hubland, 97074 Würzburg, Germany
| | - Thorsten Scherpf
- Institut für Organische Chemie, Universität Würzburg, Wilhelm Conrad Röntgen Research
Center for Complex Material Systems, Center for Nanosystems Chemistry,
Am Hubland, 97074 Würzburg, Germany
| | - Harald Ceymann
- Institut für Organische Chemie, Universität Würzburg, Wilhelm Conrad Röntgen Research
Center for Complex Material Systems, Center for Nanosystems Chemistry,
Am Hubland, 97074 Würzburg, Germany
| | - Alexander Schmiedel
- Institut für Organische Chemie, Universität Würzburg, Wilhelm Conrad Röntgen Research
Center for Complex Material Systems, Center for Nanosystems Chemistry,
Am Hubland, 97074 Würzburg, Germany
| | - Marco Holzapfel
- Institut für Organische Chemie, Universität Würzburg, Wilhelm Conrad Röntgen Research
Center for Complex Material Systems, Center for Nanosystems Chemistry,
Am Hubland, 97074 Würzburg, Germany
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22
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Liu X, Cho B, Chan LY, Kwan WL, Ken Lee CL. Development of asymmetrical near infrared squaraines with large Stokes shift. RSC Adv 2015. [DOI: 10.1039/c5ra18998e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
New asymmetrical squaraines with large Stokes shifts of up to 90 nm were synthesized. TDDFT calculations indicate that steric effects from N,N-dibutylaniline and squaraine contribute to the large geometric change, resulting in the large Stokes shift.
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Affiliation(s)
- Xiaoqian Liu
- Centre for Biomedical and Life Sciences
- Department of Technology
- Innovation and Enterprise (TIE)
- Singapore Polytechnic
- Singapore
| | - Bokun Cho
- Energetics Research Institute (EnRI)
- Nanyang Technological University
- Singapore
| | - Li-Yan Chan
- Centre for Biomedical and Life Sciences
- Department of Technology
- Innovation and Enterprise (TIE)
- Singapore Polytechnic
- Singapore
| | - Wei Lek Kwan
- Engineering Product Development
- Singapore University of Technology and Design
- Singapore
| | - Chi-Lik Ken Lee
- Centre for Biomedical and Life Sciences
- Department of Technology
- Innovation and Enterprise (TIE)
- Singapore Polytechnic
- Singapore
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23
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Deibel N, Sommer MG, Hohloch S, Schwann J, Schweinfurth D, Ehret F, Sarkar B. Dinuclear Quinonoid-Bridged d8 Metal Complexes with Redox-Active Azobenzene Stoppers: Electrochemical Properties and Electrochromic Behavior. Organometallics 2014. [DOI: 10.1021/om500035c] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Naina Deibel
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Michael G. Sommer
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Stephan Hohloch
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Johannes Schwann
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - David Schweinfurth
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Fabian Ehret
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Biprajit Sarkar
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
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24
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Yi X, Wang F, Qin W, Yang X, Yuan J. Near-infrared fluorescent probes in cancer imaging and therapy: an emerging field. Int J Nanomedicine 2014; 9:1347-65. [PMID: 24648733 PMCID: PMC3956734 DOI: 10.2147/ijn.s60206] [Citation(s) in RCA: 154] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Near-infrared fluorescence (NIRF) imaging is an attractive modality for early cancer detection with high sensitivity and multi-detection capability. Due to convenient modification by conjugating with moieties of interests, NIRF probes are ideal candidates for cancer targeted imaging. Additionally, the combinatory application of NIRF imaging and other imaging modalities that can delineate anatomical structures extends fluorometric determination of biomedical information. Moreover, nanoparticles loaded with NIRF dyes and anticancer agents contribute to the synergistic management of cancer, which integrates the advantage of imaging and therapeutic functions to achieve the ultimate goal of simultaneous diagnosis and treatment. Appropriate probe design with targeting moieties can retain the original properties of NIRF and pharmacokinetics. In recent years, great efforts have been made to develop new NIRF probes with better photostability and strong fluorescence emission, leading to the discovery of numerous novel NIRF probes with fine photophysical properties. Some of these probes exhibit tumoricidal activities upon light radiation, which holds great promise in photothermal therapy, photodynamic therapy, and photoimmunotherapy. This review aims to provide a timely and concise update on emerging NIRF dyes and multifunctional agents. Their potential uses as agents for cancer specific imaging, lymph node mapping, and therapeutics are included. Recent advances of NIRF dyes in clinical use are also summarized.
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Affiliation(s)
- Xiaomin Yi
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China
| | - Fuli Wang
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China
| | - Weijun Qin
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China
| | - Xiaojian Yang
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China
| | - Jianlin Yuan
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China
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25
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Deibel N, Hohloch S, Sommer MG, Schweinfurth D, Ehret F, Braunstein P, Sarkar B. Electrochromic Platinum(II) Complexes Derived from Azobenzene and Zwitterionic Quinonoid Ligands: Electronic and Geometric Structures. Organometallics 2013. [DOI: 10.1021/om4009179] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Naina Deibel
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Stephan Hohloch
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Michael G. Sommer
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - David Schweinfurth
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Fabian Ehret
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Pierre Braunstein
- Laboratoire de Chimie
de Coordination, Institut
de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue
Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Biprajit Sarkar
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
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26
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Polit W, Mücke P, Wuttke E, Exner T, Winter RF. Charge and Spin Confinement to the Amine Site in 3-Connected Triarylamine Vinyl Ruthenium Conjugates. Organometallics 2013. [DOI: 10.1021/om4007455] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Walther Polit
- Fachbereich
Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Philipp Mücke
- Fachbereich
Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Evelyn Wuttke
- Fachbereich
Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Thomas Exner
- Pharmazeutisches
Institut, Eberhard-Karls Universität Tübingen, Auf
der Morgenstelle 8, D-72076 Tübingen, Germany
| | - Rainer F. Winter
- Fachbereich
Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
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27
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Yong G, Zhang X, Zhao Y, She W. Stacking-induced diamagnetic/paramagnetic conversion of imidazo[1,2-a]pyridin-2(3 H)-one derivatives: near-infrared absorption and magnetic properties in the solid state. Chem Asian J 2013; 8:2182-8. [PMID: 23775777 DOI: 10.1002/asia.201300400] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 04/27/2013] [Indexed: 11/12/2022]
Abstract
Herein, we present three imidazo[1,2-a]pyridin-2(3 H)-one derivatives that are diamagnetic in solution, but paramagnetic in the solid state, possibly owing to a stacking-induced formation of phenoxide-type radicals. Notably, a larger bathochromic shift of the absorption (even up to the near- infrared region) of these three compounds was observed in the solid state than in solution, which was attributable to the ordered columnar stacking arrangements or their single-electron character as radicals in the solid state. Interestingly, compared to that in solution, (E)-3-(pyridin-4'-ylmethylene)imidazo[1,2-a]pyridine 2(3 H)-one displayed a largely red-shifted emission (centered at 660 nm, with tailing above 800 nm) in the solid state. A larger bathochromic shift (260 nm) of the emission is an indication of better order and tight stacking in the solid state, which is brought about by the rigid and polar acceptor. These three compounds also reveal different magnetic susceptibilities at 300 K, thus implying that they possess various columnar stacking structures. Most interestingly, these three radicals exhibit unusual ferromagnetic-to-antiferromagnetic phase transitions, which can be attributed to anisotropic contraction and non-uniform slippage of the columnar stacking chains.
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Affiliation(s)
- Guoping Yong
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China.
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28
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Polit W, Exner T, Wuttke E, Winter RF. Vinylruthenium-triarylamine conjugates as electroswitchable polyelectrochromic NIR dyes. ACTA ACUST UNITED AC 2012. [DOI: 10.1515/irm-2012-0005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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