1
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Ansteatt S, Gelfand R, Pelton M, Ptaszek M. Geometry-Independent Ultrafast Energy Transfer in Bioinspired Arrays Containing Electronically Coupled BODIPY Dimers as Energy Donors. Chemistry 2023; 29:e202301571. [PMID: 37494565 DOI: 10.1002/chem.202301571] [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: 05/17/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 07/28/2023]
Abstract
In photosynthetic light-harvesting complexes, strong interaction between chromophores enables efficient absorption of solar radiation and has been suggested to enable ultrafast energy funneling to the reaction center. To examine whether similar effects can be realized in synthetic systems, and to determine the mechanisms of energy transfer, we synthesized and characterized a series of bioinspired arrays containing strongly-coupled BODIPY dimers as energy donors and chlorin derivatives as energy acceptors. The BODIPY dimers feature broad absorption in the range of 500-600 nm, complementing the chlorin absorption to provide absorption across the entire visible spectrum. Ultrafast (~10 ps) energy transfer was observed from photoexcited BODIPY dyads to chlorin subunits. Surprisingly, the energy-transfer rate is nearly independent of the position where the BODIPY dimer is attached to the chlorin and of the type of connecting linker. In addition, the energy-transfer rate from BODIPY dimers to chlorin is slower than the corresponding rate in arrays containing BODIPY monomers. The lower rate, corresponding to less efficient through-bond transfer, is most likely due to weaker electronic coupling between the ground state of the chlorin acceptor and the delocalized electronic state of the BODIPY dimer, compared to the localized state of a BODIPY monomer.
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Affiliation(s)
- Sara Ansteatt
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County (UMBC), 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Rachel Gelfand
- Department of Physics, University of Maryland, Baltimore County (UMBC), 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Matthew Pelton
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County (UMBC), 1000 Hilltop Circle, Baltimore, MD 21250, USA
- Department of Physics, University of Maryland, Baltimore County (UMBC), 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County (UMBC), 1000 Hilltop Circle, Baltimore, MD 21250, USA
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2
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Kato T, Riahin C, Furusawa A, Fukushima H, Wakiyama H, Okuyama S, Takao S, Choyke PL, Ptaszek M, Rosenzweig Z, Kobayashi H. Simultaneous multicolor imaging of lymph node chains using hydroporphyrin-doped near-infrared-emitting polymer dots. Nanomedicine (Lond) 2023; 18:659-666. [PMID: 37254845 PMCID: PMC10283015 DOI: 10.2217/nnm-2023-0044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 04/21/2023] [Indexed: 06/01/2023] Open
Abstract
Aim: Evaluation of lymphatic drainage can be challenging to differentiate between separate drainage basins because only one 'color' is typically employed in sentinel node studies. This study aimed to test the feasibility of multicolor in vivo lymphangiography using newly developed organic polymer dots. Materials & methods: Biocompatible, purely organic, hydroporphyrin-doped near-infrared-emitting polymer dots were developed and evaluated for in vivo multicolor imaging in mouse lymph nodes. Results & conclusion: The authors demonstrated successful multicolor in vivo fluorescence lymphangiography using polymer dots, each tuned to a different emission spectrum. This allows minimally invasive visualization of at least four separate lymphatic drainage basins using fluorescent nanoparticles, which have the potential for clinical translation.
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Affiliation(s)
- Takuya Kato
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892-1088, USA
| | - Connor Riahin
- Department of Chemistry & Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Aki Furusawa
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892-1088, USA
| | - Hiroshi Fukushima
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892-1088, USA
| | - Hiroaki Wakiyama
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892-1088, USA
| | - Shuhei Okuyama
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892-1088, USA
| | - Seiichiro Takao
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892-1088, USA
| | - Peter L Choyke
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892-1088, USA
| | - Marcin Ptaszek
- Department of Chemistry & Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Zeev Rosenzweig
- Department of Chemistry & Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Hisataka Kobayashi
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892-1088, USA
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3
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Effect of Substituent Location on the Relationship between the Transition Dipole Moments, Difference Static Dipole, and Hydrophobicity in Squaraine Dyes for Quantum Information Devices. Molecules 2023; 28:molecules28052163. [PMID: 36903409 PMCID: PMC10004711 DOI: 10.3390/molecules28052163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/11/2023] [Accepted: 02/15/2023] [Indexed: 03/03/2023] Open
Abstract
Aggregates of organic dyes that exhibit excitonic coupling have a wide array of applications, including medical imaging, organic photovoltaics, and quantum information devices. The optical properties of a dye monomer, as a basis of dye aggregate, can be modified to strengthen excitonic coupling. Squaraine (SQ) dyes are attractive for those applications due to their strong absorbance peak in the visible range. While the effects of substituent types on the optical properties of SQ dyes have been previously examined, the effects of various substituent locations have not yet been investigated. In this study, density functional theory (DFT) and time-dependent density functional theory (TD-DFT) were used to investigate the relationships between SQ substituent location and several key properties of the performance of dye aggregate systems, namely, difference static dipole (Δd), transition dipole moment (μ), hydrophobicity, and the angle (θ) between Δd and μ. We found that attaching substituents along the long axis of the dye could increase μ while placement off the long axis was shown to increase Δd and reduce θ. The reduction in θ is largely due to a change in the direction of Δd as the direction of μ is not significantly affected by substituent position. Hydrophobicity decreases when electron-donating substituents are located close to the nitrogen of the indolenine ring. These results provide insight into the structure-property relationships of SQ dyes and guide the design of dye monomers for aggregate systems with desired properties and performance.
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4
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Riahin C, Mendis K, Busick B, Ptaszek M, Yang M, Stacey G, Parvate A, Evans JE, Traeger J, Hu D, Orr G, Rosenzweig Z. Near Infrared Emitting Semiconductor Polymer Dots for Bioimaging and Sensing. SENSORS (BASEL, SWITZERLAND) 2022; 22:7218. [PMID: 36236328 PMCID: PMC9571013 DOI: 10.3390/s22197218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Semiconducting polymer dots (Pdots) are rapidly becoming one of the most studied nanoparticles in fluorescence bioimaging and sensing. Their small size, high brightness, and resistance to photobleaching make them one of the most attractive fluorophores for fluorescence imaging and sensing applications. This paper highlights our recent advances in fluorescence bioimaging and sensing with nanoscale luminescent Pdots, specifically the use of organic dyes as dopant molecules to modify the optical properties of Pdots to enable deep red and near infrared fluorescence bioimaging applications and to impart sensitivity of dye doped Pdots towards selected analytes. Building on our earlier work, we report the formation of secondary antibody-conjugated Pdots and provide Cryo-TEM evidence for their formation. We demonstrate the selective targeting of the antibody-conjugated Pdots to FLAG-tagged FLS2 membrane receptors in genetically engineered plant leaf cells. We also report the formation of a new class of luminescent Pdots with emission wavelengths of around 1000 nm. Finally, we demonstrate the formation and utility of oxygen sensing Pdots in aqueous media.
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Affiliation(s)
- Connor Riahin
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, MD 21250, USA
| | - Kushani Mendis
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, MD 21250, USA
| | - Brandon Busick
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, MD 21250, USA
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, MD 21250, USA
| | - Mengran Yang
- Divisions of Plant Sciences and Biochemistry, University of Missouri, Columbia, MO 65211, USA
| | - Gary Stacey
- Divisions of Plant Sciences and Biochemistry, University of Missouri, Columbia, MO 65211, USA
| | - Amar Parvate
- Environmental Molecular Sciences Laboratory (EMSL), Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - James E. Evans
- Environmental Molecular Sciences Laboratory (EMSL), Pacific Northwest National Laboratory, Richland, WA 99354, USA
- School of Biological Sciences, Washington State University, Pullman, WA 99164, USA
| | - Jeremiah Traeger
- Environmental Molecular Sciences Laboratory (EMSL), Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Dehong Hu
- Environmental Molecular Sciences Laboratory (EMSL), Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Galya Orr
- Environmental Molecular Sciences Laboratory (EMSL), Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Zeev Rosenzweig
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, MD 21250, USA
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5
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Taniguchi M, Bocian DF, Holten D, Lindsey JS. Beyond green with synthetic chlorophylls – Connecting structural features with spectral properties. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C: PHOTOCHEMISTRY REVIEWS 2022. [DOI: 10.1016/j.jphotochemrev.2022.100513] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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6
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Riahin C, Meares A, Esemoto NN, Ptaszek M, LaScola M, Pandala N, Lavik E, Yang M, Stacey G, Hu D, Traeger JC, Orr G, Rosenzweig Z. Hydroporphyrin-Doped Near-Infrared-Emitting Polymer Dots for Cellular Fluorescence Imaging. ACS APPLIED MATERIALS & INTERFACES 2022; 14:20790-20801. [PMID: 35451825 PMCID: PMC9210996 DOI: 10.1021/acsami.2c02551] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Near-infrared (NIR) fluorescent semiconductor polymer dots (Pdots) have shown great potential for fluorescence imaging due to their exceptional chemical and photophysical properties. This paper describes the synthesis of NIR-emitting Pdots with great control and tunability of emission peak wavelength. The Pdots were prepared by doping poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(1,4-benzo-(2,1',3)-thiadiazole)] (PFBT), a semiconducting polymer commonly used as a host polymer in luminescent Pdots, with a series of chlorins and bacteriochlorins with varying functional groups. Chlorins and bacteriochlorins are ideal dopants due to their high hydrophobicity, which precludes their use as molecular probes in aqueous biological media but on the other hand prevents their leakage when doped into Pdots. Additionally, chlorins and bacteriochlorins have narrow deep red to NIR-emission bands and the wide array of synthetic modifications available for modifying their molecular structure enables tuning their emission predictably and systematically. Transmission electron microscopy (TEM) and dynamic light scattering (DLS) measurements show the chlorin- and bacteriochlorin-doped Pdots to be nearly spherical with an average diameter of 46 ± 12 nm. Efficient energy transfer between PFBT and the doped chlorins or bacteriochlorins decreases the PFBT donor emission to near baseline level and increases the emission of the doped dyes that serve as acceptors. The chlorin- and bacteriochlorin-doped Pdots show narrow emission bands ranging from 640 to 820 nm depending on the doped dye. The paper demonstrates the utility of the systematic chlorin and bacteriochlorin synthesis approach by preparing Pdots of varying emission peak wavelength, utilizing them to visualize multiple targets using wide-field fluorescence microscopy, binding them to secondary antibodies, and determining the binding of secondary antibody-conjugated Pdots to primary antibody-labeled receptors in plant cells. Additionally, the chlorin- and bacteriochlorin-doped Pdots show a blinking behavior that could enable their use in super-resolution imaging methods like STORM.
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Affiliation(s)
- Connor Riahin
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, United States
| | - Adam Meares
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, United States
| | - Nopondo N Esemoto
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, United States
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, United States
| | - Michael LaScola
- Department of Chemical, Biological and Environmental Engineering, University of Maryland, Baltimore County, Baltimore, Maryland 21250, United States
| | - Narendra Pandala
- Department of Chemical, Biological and Environmental Engineering, University of Maryland, Baltimore County, Baltimore, Maryland 21250, United States
| | - Erin Lavik
- Department of Chemical, Biological and Environmental Engineering, University of Maryland, Baltimore County, Baltimore, Maryland 21250, United States
| | - Mengran Yang
- Division of Plant Sciences and Biochemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Gary Stacey
- Division of Plant Sciences and Biochemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Dehong Hu
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Jeremiah C Traeger
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Galya Orr
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Zeev Rosenzweig
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, United States
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7
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Phenylene-linked tetrapyrrole arrays containing free base and diverse metal chelate forms – Versatile synthetic architectures for catalysis and artificial photosynthesis. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214278] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Kang HS, Satraitis A, Meares A, Bhagavathy GV, Diers JR, Niedzwiedzki DM, Kirmaier C, Ptaszek M, Bocian DF, Holten D. Conjugated-linker dependence of the photophysical properties and electronic structure of chlorin dyads. J PORPHYR PHTHALOCYA 2021. [DOI: 10.1142/s1088424621500620] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The synthesis, photophysical properties and electronic structure of seven new chlorin dyads and associated benchmark monomers are described. Each dyad contains two identical chlorins linked at the macrocycle [Formula: see text]-pyrrole 13-position. The extent of electronic communication between chlorin constituents depends on the nature of the conjugated linker. The communication is assessed by modification of prominent ground-state absorption and redox properties, rate constants and yields of excited-state decay processes, and molecular-orbital characteristics. Relative to the benchmark monomers, the chlorin dyads in toluene exhibit a substantial bathochromic shift of the long-wavelength absorption band (30 nm average), two-fold increased radiative rate constant [average (10 ns)[Formula: see text] vs. (22 ns)[Formula: see text]], reduced singlet excited-state lifetimes (average 5.0 ns vs. 8.2 ns), and increased fluorescence quantum yields (average 0.56 vs. 0.42). The excited-state lifetime and fluorescence yield for the chlorin dyad with a benzothiadiazole linker are reduced substantially in benzonitrile vs. toluene due largely to [Formula: see text]25-fold accelerated internal conversion. The results aid design strategies for molecular architectures that may find utility in solar-energy conversion and photomedicine.
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Affiliation(s)
- Hyun Suk Kang
- Department of Chemistry, Washington University, St. Louis, Missouri 63130-4889, USA
| | - Andrius Satraitis
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, USA
| | - Adam Meares
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, USA
| | - Ganga Viswanathan Bhagavathy
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, USA
| | - James R. Diers
- Department of Chemistry, University of California, Riverside, California 92521-0403, USA
| | - Dariusz M. Niedzwiedzki
- Center for Solar Energy and Energy Storage and Department of Energy, Environmental & Chemical Engineering, Washington University, St. Louis, MO 63130-4889, USA
| | - Christine Kirmaier
- Department of Chemistry, Washington University, St. Louis, Missouri 63130-4889, USA
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250, USA
| | - David F. Bocian
- Department of Chemistry, University of California, Riverside, California 92521-0403, USA
| | - Dewey Holten
- Department of Chemistry, Washington University, St. Louis, Missouri 63130-4889, USA
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9
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Uthe B, Meares A, Ptaszek M, Pelton M. Solvent-dependent energy and charge transfer dynamics in hydroporphyrin-BODIPY arrays. J Chem Phys 2020; 153:074302. [PMID: 32828083 DOI: 10.1063/5.0012737] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Arrays of hydroporphyrins with boron complexes of dipyrromethene (BODIPY) are a promising platform for biomedical imaging or solar energy conversion, but their photophysical properties have been relatively unexplored. In this paper, we use time-resolved fluorescence, femtosecond transient absorption spectroscopy, and density-functional-theory calculations to elucidate solvent-dependent energy and electron-transfer processes in a series of chlorin- and bacteriochlorin-BODIPY arrays. Excitation of the BODIPY moiety results in ultrafast energy transfer to the hydroporphyrin moiety, regardless of the solvent. In toluene, energy is most likely transferred via the through-space Förster mechanism from the S1 state of BODIPY to the S2 state of hydroporphyrin. In DMF, substantially faster energy transfer is observed, which implies a contribution of the through-bond Dexter mechanism. In toluene, excited hydroporphyrin components show bright fluorescence, with quantum yield and fluorescence lifetime comparable to those of the benchmark monomer, whereas in DMF, moderate to significant reduction of both quantum yield and fluorescence lifetime are observed. We attribute this quenching to photoinduced charge transfer from hydroporphyrin to BODIPY. No direct spectral signature of the charge-separated state is observed, which suggests that either (1) the charge-separated state decays very quickly to the ground state or (2) virtual charge-separated states, close in energy to S1 of hydroporphyrin, promote ultrafast internal conversion.
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Affiliation(s)
- Brian Uthe
- Department of Physics, UMBC (University of Maryland, Baltimore County), 1000 Hilltop Circle, Baltimore, Maryland 21250, USA
| | - Adam Meares
- Department of Chemistry and Biochemistry, UMBC (University of Maryland, Baltimore County), 1000 Hilltop Circle, Baltimore, Maryland 21250, USA
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry, UMBC (University of Maryland, Baltimore County), 1000 Hilltop Circle, Baltimore, Maryland 21250, USA
| | - Matthew Pelton
- Department of Physics, UMBC (University of Maryland, Baltimore County), 1000 Hilltop Circle, Baltimore, Maryland 21250, USA
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10
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Pucelik B, Sułek A, Dąbrowski JM. Bacteriochlorins and their metal complexes as NIR-absorbing photosensitizers: properties, mechanisms, and applications. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213340] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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Melissari Z, Sample HC, Twamley B, Williams RM, Senge MO. Synthesis and Spectral Properties of
gem
‐Dimethyl Chlorin Photosensitizers. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.202000051] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Zoi Melissari
- Medicinal ChemistryTrinity Translational Medicine InstituteTrinity Centre for Health SciencesTrinity College DublinThe University of Dublin St James's Hospital Dublin 8 Ireland
- Van ‘t Hoff Institute for Molecular SciencesUniversity of Amsterdam P.O. Box 94157, 1090 GD Amsterdam (The Netherlands
| | - Harry C. Sample
- Medicinal ChemistryTrinity Translational Medicine InstituteTrinity Centre for Health SciencesTrinity College DublinThe University of Dublin St James's Hospital Dublin 8 Ireland
| | - Brendan Twamley
- School of ChemistryTrinity College DublinThe University of DublinCollege Green Dublin 2 Ireland
| | - René M. Williams
- Van ‘t Hoff Institute for Molecular SciencesUniversity of Amsterdam P.O. Box 94157, 1090 GD Amsterdam (The Netherlands
| | - Mathias O. Senge
- Medicinal ChemistryTrinity Translational Medicine InstituteTrinity Centre for Health SciencesTrinity College DublinThe University of Dublin St James's Hospital Dublin 8 Ireland
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12
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Takahashi T, Ogasawara S, Shinozaki Y, Tamiaki H. Synthesis of Cationic Pyridinium–Chlorin Conjugates with Various Counter Anions and Effects of the Anions on Their Photophysical Properties. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20190367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Tatsuya Takahashi
- Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Shin Ogasawara
- Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Yoshinao Shinozaki
- Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Hitoshi Tamiaki
- Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
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13
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Arkhypchuk AI, Xiong R, Borbas KE. Investigation of the demetallation of 10-aryl substituted synthetic chlorins under acidic conditions. J Inorg Biochem 2020; 205:110979. [PMID: 31951912 DOI: 10.1016/j.jinorgbio.2019.110979] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/11/2019] [Accepted: 12/24/2019] [Indexed: 11/30/2022]
Abstract
The acidic demetallation of a series of sparsely substituted Zn(II) chlorins is reported. The chlorins were functionalized in the 10-position with substituents ranging from strongly electron donating mesityl and p-methoxyphenyl to electron-withdrawing p-nitrophenyl and pentafluorophenyl groups. The demetallation kinetics were investigated using UV-Visible absorption spectroscopy. Demetallation was carried out by exposing the metallochlorins dissolved in CH2Cl2 to an excess of trifluoroacetic acid. Reasonable correlation was found between the Hammett constant of the 10-substituent and the rate constant of the loss of the metal ion. The largest differences were observed between the p-methoxyphenyl and p-nitrophenyl-substituted Zn(II) chlorins, undergoing loss of Zn(II) with pseudo first order rate constants of 0.0789 × 10-3 and 3.70 × 10-3 min-1, respectively. Taken together, these data establish the dramatic influence even subtle changes can have in altering the electronic properties of chlorins, which in turn impacts metallochlorin function.
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Affiliation(s)
- Anna I Arkhypchuk
- Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120 Uppsala, Sweden
| | - Ruisheng Xiong
- Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120 Uppsala, Sweden
| | - K Eszter Borbas
- Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120 Uppsala, Sweden.
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14
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Palm D, Agostini A, Pohland AC, Werwie M, Jaenicke E, Paulsen H. Stability of Water-Soluble Chlorophyll Protein (WSCP) Depends on Phytyl Conformation. ACS OMEGA 2019; 4:7971-7979. [PMID: 31459885 PMCID: PMC6648419 DOI: 10.1021/acsomega.9b00054] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/26/2019] [Indexed: 05/27/2023]
Abstract
Water-soluble chlorophyll proteins (WSCP) from Brassicaceae form homotetrameric chlorophyll (Chl)-protein complexes binding one Chl per apoprotein and no carotenoids. Despite the lack of photoprotecting pigments, the complex-bound Chls displays a remarkable stability toward photodynamic damage. On the basis of a mutational study, we show that not only the presence of the phytyls is necessary for photoprotection in WSCPs, as we previously demonstrated, but also is their correct conformation and localization. The extreme heat stability of WSCP also depends on the presence of the phytyl chains, confirming their relevance for the unusual stability of WSCP.
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Affiliation(s)
- Daniel
M. Palm
- Institute
of Molecular Physiology, Johannes Gutenberg-University, Johannes-von-Müller-Weg 6, 55128 Mainz, Germany
| | - Alessandro Agostini
- Institute
of Molecular Physiology, Johannes Gutenberg-University, Johannes-von-Müller-Weg 6, 55128 Mainz, Germany
| | - Anne-Christin Pohland
- Institute
of Molecular Physiology, Johannes Gutenberg-University, Johannes-von-Müller-Weg 6, 55128 Mainz, Germany
| | - Mara Werwie
- Institute
of Molecular Physiology, Johannes Gutenberg-University, Johannes-von-Müller-Weg 6, 55128 Mainz, Germany
| | - Elmar Jaenicke
- Institute
of Molecular Physiology, Johannes Gutenberg-University, Jakob-Welder-Weg 26, 55128 Mainz, Germany
| | - Harald Paulsen
- Institute
of Molecular Physiology, Johannes Gutenberg-University, Johannes-von-Müller-Weg 6, 55128 Mainz, Germany
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15
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Arkhypchuk AI, Orthaber A, Kovacs D, Borbas KE. Isolation and Characterization of a Monoprotonated Hydroporphyrin. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801472] [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)
- Anna I. Arkhypchuk
- Department of Chemistry Ångström Laboratory, Box; Uppsala University; 523 Sweden
| | - Andreas Orthaber
- Department of Chemistry Ångström Laboratory, Box; Uppsala University; 523 Sweden
| | - Daniel Kovacs
- Department of Chemistry Ångström Laboratory, Box; Uppsala University; 523 Sweden
| | - K. Eszter Borbas
- Department of Chemistry Ångström Laboratory, Box; Uppsala University; 523 Sweden
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16
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Esemoto NN, Satraitis A, Wiratan L, Ptaszek M. Symmetrical and Nonsymmetrical Meso-Meso Directly Linked Hydroporphyrin Dyads: Synthesis and Photochemical Properties. Inorg Chem 2018; 57:2977-2988. [PMID: 29140088 DOI: 10.1021/acs.inorgchem.7b02200] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A series of a rigid meso-meso directly linked chlorin-chlorin, chlorin-bacteriochlorin, and bacteriochlorin-bacteriochlorin dyads, including free bases as well as Zn(II), Pd(II), and Cu(II) complexes, has been synthesized, and their absorption, emission, singlet oxygen (1O2) photosensitization, and electronic properties have been examined. Marked bathochromic shifts of the long-wavelength Q y absorption band and increase in fluorescence quantum yields in dyads, in comparison to the corresponding monomers, are observed. Nonsymmetrical dyads (except bacteriochlorin-bacteriochlorin) show two distinctive Q y bands, corresponding to the absorption of each dyad component. A nearly quantitative S1-S1 energy transfer between hydroporphyrins in dyads, leading to an almost exclusive emission of hydroporphyrin with a lower S1 energy, has been determined. Several symmetrical and all nonsymmetrical dyads exhibit a significant reduction in fluorescence quantum yields in solvents of high dielectric constants; this is attributed to the photoinduced electron transfer. The complexation of one macrocycle by Cu(II) or Pd(II) enhances intersystem crossing in the adjacent, free base dyad component, which is manifested by a significant reduction in fluorescence and increase in quantum yield of 1O2 photosensitization.
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Affiliation(s)
- Nopondo N Esemoto
- Department of Chemistry and Biochemistry , University of Maryland, Baltimore County , 1000 Hilltop Circle , Baltimore , Maryland 21250 , United States
| | - Andrius Satraitis
- Department of Chemistry and Biochemistry , University of Maryland, Baltimore County , 1000 Hilltop Circle , Baltimore , Maryland 21250 , United States
| | - Linda Wiratan
- Department of Chemistry and Biochemistry , University of Maryland, Baltimore County , 1000 Hilltop Circle , Baltimore , Maryland 21250 , United States
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry , University of Maryland, Baltimore County , 1000 Hilltop Circle , Baltimore , Maryland 21250 , United States
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17
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Liu R, Liu M, Hood D, Chen CY, MacNevin CJ, Holten D, Lindsey JS. Chlorophyll-Inspired Red-Region Fluorophores: Building Block Synthesis and Studies in Aqueous Media. Molecules 2018; 23:molecules23010130. [PMID: 29320445 PMCID: PMC6017558 DOI: 10.3390/molecules23010130] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 01/04/2018] [Accepted: 01/06/2018] [Indexed: 02/04/2023] Open
Abstract
Fluorophores that absorb and emit in the red spectral region (600-700 nm) are of great interest in photochemistry and photomedicine. Eight new target chlorins (and 19 new chlorins altogether)-analogues of chlorophyll-of different polarities have been designed and synthesized for various applications; seven of the chlorins are equipped with a bioconjugatable tether. Hydrophobic or amphiphilic chlorins in a non-polar organic solvent (toluene), polar organic solvent (DMF), and aqueous or aqueous micellar media show a sharp emission band in the red region and modest fluorescence quantum yield (Φf = 0.2-0.3). A Poisson analysis implies most micelles are empty and few contain >1 chlorin. Water-soluble chlorins each bearing three PEG (oligoethyleneglycol) groups exhibit narrow emission bands (full-width-at-half maximum <25 nm). The lifetime of the lowest singlet excited state and the corresponding yields and rate constants for depopulation pathways (fluorescence, intersystem crossing, internal conversion) are generally little affected by the PEG groups or dissolution in aqueous or organic media. A set of chlorin-avidin conjugates revealed a 2-fold increase in Φf with increased average chlorin/avidin ratio (2.3-12). In summary, the chlorins of various polarities described herein are well suited as red-emitting fluorophores for applications in aqueous or organic media.
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Affiliation(s)
- Rui Liu
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA; (R.L.); (M.L.)
| | - Mengran Liu
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA; (R.L.); (M.L.)
| | - Don Hood
- Department of Chemistry, Washington University, St. Louis, MO 63130-4889, USA;
| | - Chih-Yuan Chen
- NIRvana Sciences, Inc., Research Triangle Park, NC 27709, USA; (C.-Y.C.); (C.J.M.)
| | | | - Dewey Holten
- Department of Chemistry, Washington University, St. Louis, MO 63130-4889, USA;
- Correspondence: (D.H.); (J.S.L.); Tel.: +1-314-935-6502 (D.H.); +1-919-515-6406 (J.S.L.)
| | - Jonathan S. Lindsey
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA; (R.L.); (M.L.)
- Correspondence: (D.H.); (J.S.L.); Tel.: +1-314-935-6502 (D.H.); +1-919-515-6406 (J.S.L.)
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18
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Zhang A, Stillman MJ. Exploring function activated chlorins using MCD spectroscopy and DFT methods: design of a chlorin with a remarkably intense, red Q band. Phys Chem Chem Phys 2018; 20:12470-12482. [DOI: 10.1039/c8cp01010b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fictive β-substituted fluorene-thiophene Zn chlorins exhibit exceptionally intense, red Q bands with unusually small ΔHOMO.
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Affiliation(s)
- Angel Zhang
- Stillman Bioinorganic Group
- Department of Chemistry
- The University of Western Ontario
- London
- Canada
| | - Martin J. Stillman
- Stillman Bioinorganic Group
- Department of Chemistry
- The University of Western Ontario
- London
- Canada
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19
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Maher AG, Passard G, Dogutan DK, Halbach RL, Anderson BL, Gagliardi CJ, Taniguchi M, Lindsey JS, Nocera DG. Hydrogen Evolution Catalysis by a Sparsely Substituted Cobalt Chlorin. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00969] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew G. Maher
- Department
of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Guillaume Passard
- Department
of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Dilek K. Dogutan
- Department
of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Robert L. Halbach
- Department
of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Bryce L. Anderson
- Department
of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Christopher J. Gagliardi
- Department
of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Masahiko Taniguchi
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Jonathan S. Lindsey
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Daniel G. Nocera
- Department
of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
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20
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Xiong R, Bornhof A, Arkhypchuk AI, Orthaber A, Borbas KE. Furan- and Thiophene-Based Auxochromes Red-shift Chlorin Absorptions and Enable Oxidative Chlorin Polymerizations. Chemistry 2017; 23:4089-4095. [PMID: 27859811 PMCID: PMC5396321 DOI: 10.1002/chem.201604655] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Indexed: 11/08/2022]
Abstract
The de novo syntheses of chemically stable chlorins with five-membered heterocyclic (furane, thiophene, formylfurane and formylthiophene) substituents in selected meso- and β-positions are reported. Heterocycle incorporation in the 3- and 13-positions shifted the chlorin absorption and emission to the red (up to λem =680 nm), thus these readily incorporated substituents function analogously to auxochromes present in chlorophylls, for example, formyl and vinyl groups. Photophysical, theoretical and X-ray crystallographic experiments revealed small but significant differences between the behavior of the furan- and the thiophene-based auxochromes. Four regioisomeric bis-thienylchlorins (3,10; 3,13, 3,15 and 10,15) were oxidatively electropolymerized; the chlorin monomer geometry had a profound impact on the polymerization efficiency and the electrochemical properties of the resulting material. Chemical co-polymerization of 3,13-bis-thienylchlorin with 3-hexylthiophene yielded an organic-soluble red-emitting polymer.
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Affiliation(s)
- Ruisheng Xiong
- Department of ChemistryÅngström LaboratoryUppsala University, Box 52375120UppsalaSweden
| | - Anna‐Bea Bornhof
- Department of ChemistryÅngström LaboratoryUppsala University, Box 52375120UppsalaSweden
| | - Anna I. Arkhypchuk
- Department of ChemistryÅngström LaboratoryUppsala University, Box 52375120UppsalaSweden
| | - Andreas Orthaber
- Department of ChemistryÅngström LaboratoryUppsala University, Box 52375120UppsalaSweden
| | - K. Eszter Borbas
- Department of ChemistryÅngström LaboratoryUppsala University, Box 52375120UppsalaSweden
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21
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Bettanin F, Antonio FCT, Honorio KM, Homem-de-Mello P. Quantum-chemistry descriptors for photosensitizers based on macrocycles. Chem Biol Drug Des 2017; 89:207-220. [DOI: 10.1111/cbdd.12791] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 04/22/2016] [Accepted: 05/15/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Fernanda Bettanin
- ABCSim; Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André SP Brazil
- Departamento de Química; Instituto Tecnológico da Aeronáutica; São José dos Campos SP Brazil
| | - Felipe C. T. Antonio
- ABCSim; Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André SP Brazil
| | - Kathia M. Honorio
- ABCSim; Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André SP Brazil
- Escola de Artes, Ciências e Humanidades; Universidade de São Paulo; São Paulo Brazil
| | - Paula Homem-de-Mello
- ABCSim; Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; Santo André SP Brazil
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22
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Taniguchi M, Lindsey JS. Synthetic Chlorins, Possible Surrogates for Chlorophylls, Prepared by Derivatization of Porphyrins. Chem Rev 2016; 117:344-535. [DOI: 10.1021/acs.chemrev.5b00696] [Citation(s) in RCA: 187] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Masahiko Taniguchi
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Jonathan S. Lindsey
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
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23
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Kang HS, Esemoto NN, Diers JR, Niedzwiedzki DM, Greco JA, Akhigbe J, Yu Z, Pancholi C, Bhagavathy GV, Nguyen JK, Kirmaier C, Birge RR, Ptaszek M, Holten D, Bocian DF. Effects of Strong Electronic Coupling in Chlorin and Bacteriochlorin Dyads. J Phys Chem A 2016; 120:379-95. [PMID: 26765839 DOI: 10.1021/acs.jpca.5b10686] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Achieving tunable, intense near-infrared absorption in molecular architectures with properties suitable for solar light harvesting and biomedical studies is of fundamental interest. Herein, we report the photophysical, redox, and molecular-orbital characteristics of nine hydroporphyrin dyads and associated benchmark monomers that have been designed and synthesized to attain enhanced light harvesting. Each dyad contains two identical hydroporphyrins (chlorin or bacteriochlorin) connected by a linker (ethynyl or butadiynyl) at the macrocycle β-pyrrole (3- or 13-) or meso (15-) positions. The strong electronic communication between constituent chromophores is indicated by the doubling of prominent absorption features, split redox waves, and paired linear combinations of frontier molecular orbitals. Relative to the benchmarks, the chlorin dyads in toluene show substantial bathochromic shifts of the long-wavelength absorption band (17-31 nm), modestly reduced singlet excited-state lifetimes (τS = 3.6-6.2 ns vs 8.8-12.3 ns), and increased fluorescence quantum yields (Φf = 0.37-0.57 vs 0.34-0.39). The bacteriochlorin dyads in toluene show significant bathochromic shifts (25-57 nm) and modestly reduced τS (1.6-3.4 ns vs 3.5-5.3 ns) and Φf (0.09-0.19 vs 0.17-0.21) values. The τS and Φf values for the bacteriochlorin dyads are reduced substantially (up to ∼20-fold) in benzonitrile. The quenching is due primarily to the increased S1 → S0 internal conversion that is likely induced by increased contribution of charge-resonance configurations to the S1 excited state in the polar medium. The fundamental insights gained into the physicochemical properties of the strongly coupled hydroporphyrin dyads may aid their utilization in solar-energy conversion and photomedicine.
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Affiliation(s)
- Hyun Suk Kang
- Department of Chemistry, Washington University , St. Louis, Missouri 63130-4889, United States
| | - Nopondo N Esemoto
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250-0001, United States
| | - James R Diers
- Department of Chemistry, University of California , Riverside, California 92521-0403, United States
| | - Dariusz M Niedzwiedzki
- Photosynthetic Antenna Research Center, Washington University , St. Louis, Missouri 63130-4889, United States
| | - Jordan A Greco
- Department of Chemistry, University of Connecticut , Storrs, Connecticut 06269-3060, United States
| | - Joshua Akhigbe
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250-0001, United States
| | - Zhanqian Yu
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250-0001, United States
| | - Chirag Pancholi
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250-0001, United States
| | - Ganga Viswanathan Bhagavathy
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250-0001, United States
| | - Jamie K Nguyen
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250-0001, United States
| | - Christine Kirmaier
- Department of Chemistry, Washington University , St. Louis, Missouri 63130-4889, United States
| | - Robert R Birge
- Department of Chemistry, University of Connecticut , Storrs, Connecticut 06269-3060, United States
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250-0001, United States
| | - Dewey Holten
- Department of Chemistry, Washington University , St. Louis, Missouri 63130-4889, United States
| | - David F Bocian
- Department of Chemistry, University of California , Riverside, California 92521-0403, United States
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24
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Xiong R, Arkhypchuk AI, Kovacs D, Orthaber A, Eszter Borbas K. Directly linked hydroporphyrin dimers. Chem Commun (Camb) 2016; 52:9056-8. [DOI: 10.1039/c6cc00516k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The synthesis and chemical, photophysical and electrochemical characterisation of directly meso–meso- or meso-β-linked hydroporphyrin (chlorin) dimers is reported.
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Affiliation(s)
- Ruisheng Xiong
- Department of Chemistry
- Ångström Laboratory
- Uppsala University
- 75120 Uppsala
- Sweden
| | - Anna I. Arkhypchuk
- Department of Chemistry
- Ångström Laboratory
- Uppsala University
- 75120 Uppsala
- Sweden
| | - Daniel Kovacs
- Department of Chemistry
- Ångström Laboratory
- Uppsala University
- 75120 Uppsala
- Sweden
| | - Andreas Orthaber
- Department of Chemistry
- Ångström Laboratory
- Uppsala University
- 75120 Uppsala
- Sweden
| | - K. Eszter Borbas
- Department of Chemistry
- Ångström Laboratory
- Uppsala University
- 75120 Uppsala
- Sweden
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25
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Ke XS, Zhao H, Zou X, Ning Y, Cheng X, Su H, Zhang JL. Fine-Tuning of β-Substitution to Modulate the Lowest Triplet Excited States: A Bioinspired Approach to Design Phosphorescent Metalloporphyrinoids. J Am Chem Soc 2015; 137:10745-52. [PMID: 26247480 DOI: 10.1021/jacs.5b06332] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Learning nature's approach to modulate photophysical properties of NIR porphyrinoids by fine-tuning β-substituents including the number and position, in a manner similar to naturally occurring chlorophylls, has the potential to circumvent the disadvantages of traditional "extended π-conjugation" strategy such as stability, molecular size, solubility, and undesirable π-π stacking. Here we show that such subtle structural changes in Pt(II) or Pd(II) cis/trans-porphodilactones (termed by cis/trans-Pt/Pd) influence photophysical properties of the lowest triplet excited states including phosphorescence, Stokes shifts, and even photosensitization ability in triplet-triplet annihilation reactions with rubrene. Prominently, the overall upconversion capability (η, η = ε·Φ(UC)) of Pd or Pt trans-complex is 10(4) times higher than that of cis-analogue. Nanosecond time-resolved infrared (TR-IR) spectroscopy experiments showed larger frequency shift of ν(C═O) bands (ca. 10 cm(-1)) of cis-complexes than those of trans-complexes in the triplet excited states. These spectral features, combining with TD-DFT calculations, suggest the strong electronic coupling between the lactone moieties and the main porphyrin chromophores and thus the importance of precisely positioning β-substituents by mimicking chlorophylls, as an alternative to "extended π-conjugation", in designing NIR active porphyrinoids.
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Affiliation(s)
- Xian-Sheng Ke
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China
| | - Hongmei Zhao
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, P.R. China
| | - Xiaoran Zou
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, P.R. China
| | - Yingying Ning
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China
| | - Xin Cheng
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China
| | - Hongmei Su
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, P.R. China.,College of Chemistry, Beijing Normal University , Beijing 100875, P.R.China
| | - Jun-Long Zhang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.,State Key Laboratory of Coordination Chemistry, Nanjing University , Nanjing, 210093, P.R. China
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26
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Lindsey JS. De novo synthesis of gem-dialkyl chlorophyll analogues for probing and emulating our green world. Chem Rev 2015; 115:6534-620. [PMID: 26068531 DOI: 10.1021/acs.chemrev.5b00065] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jonathan S Lindsey
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
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27
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Ra D, Gauger KA, Muthukumaran K, Balasubramanian T, Chandrashaker V, Taniguchi M, Yu Z, Talley DC, Ehudin M, Ptaszek M, Lindsey JS. Progress Towards Synthetic Chlorins with Graded Polarity, Conjugatable Substituents, and Wavelength Tunability. J PORPHYR PHTHALOCYA 2015; 19:547-572. [PMID: 26640361 DOI: 10.1142/s1088424615500042] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Advances in chlorin synthetic chemistry now enable the de novo preparation of diverse chlorin-containing molecular architectures. Five distinct molecular designs have been explored here, including hydrophobic bioconjugatable (oxo)chlorins; a hydrophilic bioconjugatable chlorin; a trans-ethynyl/iodochlorin building block; a set of chlorins bearing electron-rich (methoxy, dimethylamino, methylthio) groups at the 3-position; and a set of ten 3,13-disubstituted chlorins chiefly bearing groups with extended π-moieties. Altogether 23 new chlorins (17 targets, 6 intermediates) have been prepared. The challenge associated with molecular designs that encompass the combination of "hydrophilic, bioconjugatable and wavelength-tunable" chiefly resides in the nature of the hydrophilic unit.
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Affiliation(s)
- Doyoung Ra
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA
| | - Kelly A Gauger
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA
| | - Kannan Muthukumaran
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA
| | | | | | - Masahiko Taniguchi
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA
| | - Zhanqian Yu
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250
| | - Daniel C Talley
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250
| | - Melanie Ehudin
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, Maryland 21250
| | - Jonathan S Lindsey
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA
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28
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Meares A, Satraitis A, Santhanam N, Yu Z, Ptaszek M. Deep-red emissive BODIPY-chlorin arrays excitable with green and red wavelengths. J Org Chem 2015; 80:3858-69. [PMID: 25803423 DOI: 10.1021/acs.joc.5b00119] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report here the synthesis and characterization of BODIPY-chlorin arrays containing a chlorin subunit, with tunable deep-red (641-685 nm) emission, and one or two BODIPY moieties, absorbing at 504 nm. Two types of arrays were examined: one where BODIPY moieties are attached through a phenylacetylene linker at the 13- or 3,13-positions of chlorin, and a second type where BODIPY is attached at the 10-position of chlorin through an amide linker. Each of the examined arrays exhibits an efficient (≥0.80) energy transfer from BODIPY to the chlorin moiety in both toluene and DMF and exhibits intense fluorescence of chlorin upon excitation of BODIPY at ∼500 nm. Therefore, the effective Stokes shift in such arrays is in the range of 140-180 nm. Dyads with BODIPY attached at the 10-position of chlorin exhibit a bright fluorescence in a range of solvents with different polarities (i.e., toluene, MeOH, DMF, and DMSO). In contrast to this, some of the arrays in which BODIPY is attached at the 3- or at both 3,13-positons of chlorin exhibit significant reduction of fluorescence in polar solvents. Overall, dyads where BODIPY is attached at the 10-position of chlorin exhibit ∼5-fold brighter fluorescence than corresponding chlorin monomers, upon excitation at 500 nm.
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Affiliation(s)
- Adam Meares
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, United States
| | - Andrius Satraitis
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, United States
| | - Nithya Santhanam
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, United States
| | - Zhanqian Yu
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, United States
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, United States
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29
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Yuen JM, Harris MA, Liu M, Diers JR, Kirmaier C, Bocian DF, Lindsey JS, Holten D. Effects of substituents on synthetic analogs of chlorophylls. Part 4: How formyl group location dictates the spectral properties of chlorophylls b, d and f. Photochem Photobiol 2015; 91:331-42. [PMID: 25488432 DOI: 10.1111/php.12401] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 12/03/2014] [Indexed: 12/24/2022]
Abstract
Photosynthetic organisms are adapted to light characteristics in their habitat in part via the spectral characteristics of the associated chlorophyll pigments, which differ in the position of a formyl group around the chlorin macrocycle (chlorophylls b, d, f) or no formyl group (chlorophyll a). To probe the origin of this spectral tuning, the photophysical and electronic structural properties of a new set of synthetic chlorins are reported. The zinc and free base chlorins have a formyl group at either the 2- or 3-position. The four compounds have fluorescence yields in the range 0.19-0.28 and singlet excited-state lifetimes of ca 4 ns for zinc chelates and ca 8 ns for the free base forms. The photophysical properties of the 2- and 3-formyl zinc chlorins are similar to those observed previously for 13-formyl or 3,13-diformyl chlorins, but differ markedly from those for 7-formyl analogs. Molecular-orbital characteristics obtained from density functional theory (DFT) calculations were used as input to spectral simulations employing the four-orbital model. The analysis has uncovered the key changes in electronic structure engendered by the presence/location of a formyl group at various macrocycle positions, which is relevant to understanding the distinct spectral properties of the natural chlorophylls a, b, d and f.
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Affiliation(s)
- Jonathan M Yuen
- Department of Chemistry, Washington University, St. Louis, MO
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30
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Faries KM, Diers JR, Springer JW, Yang E, Ptaszek M, Lahaye D, Krayer M, Taniguchi M, Kirmaier C, Lindsey JS, Bocian DF, Holten D. Photophysical Properties and Electronic Structure of Chlorin-Imides: Bridging the Gap between Chlorins and Bacteriochlorins. J Phys Chem B 2015; 119:7503-15. [DOI: 10.1021/jp511257w] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Kaitlyn M. Faries
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4889, United States
| | - James R. Diers
- Department
of Chemistry, University of California, Riverside, Riverside, California 92521-0403, United States
| | - Joseph W. Springer
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4889, United States
| | - Eunkyung Yang
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4889, United States
| | - Marcin Ptaszek
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Dorothée Lahaye
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Michael Krayer
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Masahiko Taniguchi
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Christine Kirmaier
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4889, United States
| | - Jonathan S. Lindsey
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - David F. Bocian
- Department
of Chemistry, University of California, Riverside, Riverside, California 92521-0403, United States
| | - Dewey Holten
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4889, United States
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31
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Yu Z, Pancholi C, Bhagavathy GV, Kang HS, Nguyen JK, Ptaszek M. Strongly conjugated hydroporphyrin dyads: extensive modification of hydroporphyrins' properties by expanding the conjugated system. J Org Chem 2014; 79:7910-25. [PMID: 25061710 DOI: 10.1021/jo501041b] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report the synthesis and basic photophysical characterization of strongly conjugated hydroporphyrin (chlorin and bacteriochlorin) dyads. Hydroporphyrins are connected at their respective 13 (β) or 15 (meso) positions by ethynyl or butadiynyl linkers. Synthesis entails a series of palladium-catalyzed reactions, starting from appropriate bromobacteriochlorin or bromochlorin. Strong conjugation in the dyads results in a significant bathochromic shift of longest-wavelength (Qy-like) band, which in case of the 13-13' ethynyl-linked bacteriochlorin dyad is positioned past 800 nm. The Qy-like band is broad and split for the 13-13' linked chlorin and bacteriochlorin dyads. All dyads exhibit an intense, relatively narrow fluorescence emission band in nonpolar solvents. Bacteriochlorin dyads exhibit a strong dependence of fluorescence intensity on the solvent polarity, which results in more than 10-fold quenching of fluorescence in dimethylformamide. The assembling of hydroporphyrins into strongly conjugated arrays represents an efficient means to tune and expand their optical and photochemical properties, which should greatly broaden the properties attainable for these chromophores.
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Affiliation(s)
- Zhanqian Yu
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250, United States
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32
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Yang E, Wang J, Diers JR, Niedzwiedzki DM, Kirmaier C, Bocian DF, Lindsey JS, Holten D. Probing electronic communication for efficient light-harvesting functionality: dyads containing a common perylene and a porphyrin, chlorin, or bacteriochlorin. J Phys Chem B 2014; 118:1630-47. [PMID: 24484243 DOI: 10.1021/jp411629m] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The synthesis, photophysical, redox, and molecular-orbital characteristics of three perylene-tetrapyrrole dyads were investigated to probe the efficacy of the arrays for use as light-harvesting constituents. Each dyad contains a common perylene-monoimide that is linked at the N-imide position via an arylethynyl group to the meso-position of the tetrapyrrole. The tetrapyrroles include a porphyrin, chlorin, and bacteriochlorin, which have zero, one, and two reduced pyrrole rings, respectively. The increased pyrrole-ring reduction results in a progressive red shift and intensification of the lowest-energy absorption band, as exemplified by benchmark monomers. The arylethyne linkage affords moderate perylene-tetrapyrrole electronic coupling in the dyads as evidenced by the optical, molecular-orbital, and redox properties of the components of the dyads versus the constituent parts. All three dyads in nonpolar solvents exhibit relatively fast (subpicosecond) energy transfer from the perylene to the tetrapyrrole. Competing charge-transfer processes are also absent in nonpolar solvents, but become active for both the chlorin and bacteriochlorin-containing dyads in polar solvents. Calculations of energy-transfer rates via the Förster, through-space mechanism reveal that these rates are, on average, 3-fold slower than the observed rates. Thus, the Dexter through-bond mechanism contributes more substantially than the through-space mechanism to energy transfer in the dyads. The electronic communication between the perylene and tetrapyrrole falls in a regime intermediate between those operative in other classes of perylene-tetrapyrrole dyads that have previously been studied.
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Affiliation(s)
- Eunkyung Yang
- Department of Chemistry, Washington University , St. Louis, Missouri, 63130-4889, United States
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33
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Ptaszek M. Rational design of fluorophores for in vivo applications. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2014; 113:59-108. [PMID: 23244789 DOI: 10.1016/b978-0-12-386932-6.00003-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Several classes of small organic molecules exhibit properties that make them suitable for fluorescence in vivo imaging. The most promising candidates are cyanines, squaraines, boron dipyrromethenes, porphyrin derivatives, hydroporphyrins, and phthalocyanines. The recent designing and synthetic efforts have been dedicated to improving their optical properties (shift the absorption and emission maxima toward longer wavelengths and increase the brightness) as well as increasing their stability and water solubility. The most notable advances include development of encapsulated cyanine dyes with increased stability and water solubility, squaraine rotaxanes with increased stability, long-wavelength-absorbing boron dipyrromethenes, long-wavelength-absorbing porphyrin and hydroporphyrin derivatives, and water-soluble phthalocyanines. Recent advances in luminescence and bioluminescence have made self-illuminating fluorophores available for in vivo applications. Development of new types of hydroporphyrin energy-transfer dyads gives the promise for further advances in in vivo multicolor imaging.
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Affiliation(s)
- Marcin Ptaszek
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, Maryland, USA
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34
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Liu M, Ptaszek M, Mass O, Minkler DF, Sommer RD, Bhaumik J, Lindsey JS. Regioselective β-pyrrolic electrophilic substitution of hydrodipyrrin–dialkylboron complexes facilitates access to synthetic models for chlorophyll f. NEW J CHEM 2014. [DOI: 10.1039/c3nj01508d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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35
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Springer JW, Taniguchi M, Krayer M, Ruzié C, Diers JR, Niedzwiedzki DM, Bocian DF, Lindsey JS, Holten D. Photophysical properties and electronic structure of retinylidene–chlorin–chalcones and analogues. Photochem Photobiol Sci 2014; 13:634-50. [DOI: 10.1039/c3pp50421b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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36
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Keshav K, Kumar D, Elias AJ. Synthesis, spectral, and structural studies of porphyrins having sterically hindered [η(5)-CpCo(η(4)-C4Ph4)] cobalt sandwich units at the meso positions. Inorg Chem 2013; 52:12351-66. [PMID: 24152207 DOI: 10.1021/ic401099c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthesis, spectral, and structural studies of the first examples of porphyrins substituted at the meso positions with sterically hindered η(5)-CpCo(η(4)-C4Ph4) cobalt sandwich units are described. The novel dipyrromethane derived cobalt sandwich compound {η(5)-[(C4H4N)2CH]C5H4}Co(η(4)-C4Ph4) 1, as well as its parent aldehyde, η(5)-[C5H4(CHO)]Co(η(4)-C4Ph4), were used in the synthesis of porphyrins having one or two η(5)-CpCo(η(4)-C4Ph4) groups at their meso positions. 1,9-Diformyldipyrromethane derived η(5)-CpCo(η(4)-C4Ph4) 2 was synthesized using dipyrromethane 1 under Vilsmeier conditions. A reaction of 2 with unsubstituted dipyrromethane under basic conditions in the presence of Pd(C6H5CN)2Cl2 yielded an A-type palladium coordinated porphyrin 3 [where A = η(5)-CpCo(η(4)-C4Ph4)]. A similar reaction of 2 with meso aryl and ferrocenyl-substituted dipyrromethanes yielded trans-AB type palladium coordinated porphyrins 4-6 [where A = η(5)-CpCo(η(4)-C4Ph4) and B = 4-tert-butylphenyl 4, ferrocenyl 5, and pentafluorophenyl 6]. Reactions of 2 with 5-ferrocenyl dipyrromethane under the same reaction conditions in the presence of Ni(acac)2 and Zn(OAc)2 gave the trimetallic nickel(II) and zinc(II) complexed trans-AB type porphyrins 7 and 8 having both cobalt and iron sandwich units at the meso positions. Crystal structure of the Pd(II) porphyrin 5 and nickel(II) porphyrin 7 showed nonplanar structures having distinct ruffle type distortion of the porphyrin ring. Demetalation of the zinc(II) trans-AB type porphyrin 8 in the presence of trifluoroacetic acid gave the metal free base porphyrin 9. Reactions of the cobalt sandwich aldehyde [(η(5)-C5H4(CHO)]Co(η(4)-C4Ph4) with sterically hindered dipyrromethane derivatives under acid-catalyzed condensation reactions gave trans-A2B2 type porphyrins [where A = η(5)-CpCo(η(4)-C4Ph4) and B = pentafluorophenyl, 10 mesityl 11]. In contrast, reactions of [η(5)-C5H4(CHO)]Co(η(4)-C4Ph4) with sterically unhindered meso-4-tert-butylphenyl dipyrromethane resulted in both AB3 12 and cis-A2B2 13 type porphyrins [where A = η(5)-CpCo(η(4)-C4Ph4) and B = (4-tert-butylphenyl] as a result of scrambling. The new porphyrin derivatives have been structurally characterized, and their spectral and electrochemical features were determined.
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Affiliation(s)
- Karunesh Keshav
- Department of Chemistry, Indian Institute of Technology , Delhi, Hauz Khas, New Delhi, 110016, India
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37
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Yu Z, Ptaszek M. Near-IR emissive chlorin-bacteriochlorin energy-transfer dyads with a common donor and acceptors with tunable emission wavelength. J Org Chem 2013; 78:10678-91. [PMID: 24079536 DOI: 10.1021/jo4016858] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Design, synthesis, and optical properties of a series of novel chlorin-bacteriochlorin energy transfer dyads are described. Each dyad is composed of a common red-absorbing (645-646 nm) chlorin, as an energy donor, and a different near-IR emitting bacteriochlorin, as an energy acceptor. Each bacteriochlorin acceptor is equipped with a different set of auxochromes, so that each of them emits at a different wavelength. Dyads exhibit an efficient energy transfer (≥0.77) even for chlorin-bacteriochlorin pairs with large (up to 122 nm) separation between donor emission and acceptor absorption. Excitation of the chlorin donor results in relatively strong emission of the bacteriochlorin acceptor, with a quantum yield Φf range of 0.155-0.23 in toluene and 0.12-0.185 in DMF. The narrow, tunable emission band of bacteriochlorins enables the selection of a series of three dyads with well-resolved emissions at 732, 760, and 788 nm, and common excitation at 645 nm. Selected dyads have been also converted into bioconjugatable N-succinamide ester derivatives. The optical properties of the described dyads make them promising candidates for development of a family of near-IR fluorophores for simultaneous imaging of multiple targets, where the whole set of fluorophores can be excited with the common wavelength, and fluorescence from each can be independently detected.
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Affiliation(s)
- Zhanqian Yu
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , 1000 Hilltop Circle, Baltimore, Maryland 21250, United States
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38
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Mahboob A, Vassiliev S, Poddutoori PK, van der Est A, Bruce D. Factors controlling the redox potential of ZnCe6 in an engineered bacterioferritin photochemical 'reaction centre'. PLoS One 2013; 8:e68421. [PMID: 23935866 PMCID: PMC3728335 DOI: 10.1371/journal.pone.0068421] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 05/30/2013] [Indexed: 11/20/2022] Open
Abstract
Photosystem II (PSII) of photosynthesis has the unique ability to photochemically oxidize water. Recently an engineered bacterioferritin photochemical ‘reaction centre’ (BFR-RC) using a zinc chlorin pigment (ZnCe6) in place of its native heme has been shown to photo-oxidize bound manganese ions through a tyrosine residue, thus mimicking two of the key reactions on the electron donor side of PSII. To understand the mechanism of tyrosine oxidation in BFR-RCs, and explore the possibility of water oxidation in such a system we have built an atomic-level model of the BFR-RC using ONIOM methodology. We studied the influence of axial ligands and carboxyl groups on the oxidation potential of ZnCe6 using DFT theory, and finally calculated the shift of the redox potential of ZnCe6 in the BFR-RC protein using the multi-conformational molecular mechanics–Poisson-Boltzmann approach. According to our calculations, the redox potential for the first oxidation of ZnCe6 in the BRF-RC protein is only 0.57 V, too low to oxidize tyrosine. We suggest that the observed tyrosine oxidation in BRF-RC could be driven by the ZnCe6 di-cation. In order to increase the efficiency of tyrosine oxidation, and ultimately oxidize water, the first potential of ZnCe6 would have to attain a value in excess of 0.8 V. We discuss the possibilities for modifying the BFR-RC to achieve this goal.
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Affiliation(s)
- Abdullah Mahboob
- Department of Biological Sciences, Brock University, St. Catharines, Ontario, Canada.
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39
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Wang J, Yang E, Diers JR, Niedzwiedzki DM, Kirmaier C, Bocian DF, Lindsey JS, Holten D. Distinct Photophysical and Electronic Characteristics of Strongly Coupled Dyads Containing a Perylene Accessory Pigment and a Porphyrin, Chlorin, or Bacteriochlorin. J Phys Chem B 2013; 117:9288-304. [DOI: 10.1021/jp405004d] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jieqi Wang
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina
27695-8204, United States
| | - Eunkyung Yang
- Department of Chemistry, Washington University, St. Louis, Missouri 63130-4889,
United States
| | - James R. Diers
- Department
of Chemistry, University of California,
Riverside, California 92521-0403,
United States
| | - Dariusz M. Niedzwiedzki
- Department of Chemistry, Washington University, St. Louis, Missouri 63130-4889,
United States
| | - Christine Kirmaier
- Department of Chemistry, Washington University, St. Louis, Missouri 63130-4889,
United States
| | - David F. Bocian
- Department
of Chemistry, University of California,
Riverside, California 92521-0403,
United States
| | - Jonathan S. Lindsey
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina
27695-8204, United States
| | - Dewey Holten
- Department of Chemistry, Washington University, St. Louis, Missouri 63130-4889,
United States
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40
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Yang E, Ruzié C, Krayer M, Diers JR, Niedzwiedzki DM, Kirmaier C, Lindsey JS, Bocian DF, Holten D. Photophysical properties and electronic structure of bacteriochlorin-chalcones with extended near-infrared absorption. Photochem Photobiol 2013; 89:586-604. [PMID: 23360219 DOI: 10.1111/php.12053] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 01/21/2013] [Indexed: 02/06/2023]
Abstract
Synthetic bacteriochlorins enable systematic tailoring of substituents about the bacteriochlorin chromophore and thereby provide insights concerning the native bacteriochlorophylls of bacterial photosynthesis. Nine free-base bacteriochlorins (eight prepared previously and one prepared here) have been examined that bear diverse substituents at the 13- or 3,13-positions. The substituents include chalcone (3-phenylprop-2-en-1-onyl) derivatives with groups attached to the phenyl moiety, a "reverse chalcone" (3-phenyl-3-oxo-1-enyl), and extended chalcones (5-phenylpenta-2,4-dien-1-onyl, retinylidenonyl). The spectral and photophysical properties (τs, Φf, Φ(ic), Φ(isc), τT, k(f), k(ic), k(isc)) of the bacteriochlorins have been characterized. The bacteriochlorins absorb strongly in the 780-800 nm region and have fluorescence quantum yields (Φf) in the range 0.05-0.11 in toluene and dimethylsulfoxide. Light-induced electron promotions between orbitals with predominantly substituent or macrocycle character or both may give rise to some net macrocycle ↔ substituent charge-transfer character in the lowest and higher singlet excited states as indicated by density functional theory (DFT) and time-dependent DFT calculations. Such calculations indicated significant participation of molecular orbitals beyond those (HOMO - 1 to LUMO + 1) in the Gouterman four-orbital model. Taken together, the studies provide insight into the fundamental properties of bacteriochlorins and illustrate designs for tuning the spectral and photophysical features of these near-infrared-absorbing tetrapyrrole chromophores.
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Affiliation(s)
- Eunkyung Yang
- Department of Chemistry, Washington University, St. Louis, MO, USA
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41
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Yang E, Diers JR, Huang YY, Hamblin MR, Lindsey JS, Bocian DF, Holten D. Molecular electronic tuning of photosensitizers to enhance photodynamic therapy: synthetic dicyanobacteriochlorins as a case study. Photochem Photobiol 2013; 89:605-18. [PMID: 23163632 DOI: 10.1111/php.12021] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 11/11/2012] [Indexed: 01/01/2023]
Abstract
Photophysical, photostability, electrochemical and molecular-orbital characteristics are analyzed for a set of stable dicyanobacteriochlorins that are promising photosensitizers for photodynamic therapy (PDT). The bacteriochlorins are the parent compound (BC), dicyano derivative (NC)2BC and corresponding zinc (NC)2BC-Zn and palladium chelate (NC)2BC-Pd. The order of PDT activity against HeLa human cancer cells in vitro is (NC)2BC-Pd > (NC)2BC > (NC)2BC-Zn ≈ BC. The near-infrared absorption feature of each dicyanobacteriochlorin is bathochromically shifted 35-50 nm (748-763 nm) from that for BC (713 nm). Intersystem crossing to the PDT-active triplet excited state is essentially quantitative for (NC)2BC-Pd. Phosphorescence from (NC)2BC-Pd occurs at 1122 nm (1.1 eV). This value and the measured ground-state redox potentials fix the triplet excited-state redox properties, which underpin PDT activity via Type-1 (electron transfer) pathways. A perhaps counterintuitive (but readily explicable) result is that of the three dicyanobacteriochlorins, the photosensitizer with the shortest triplet lifetime (7 μs), (NC)2BC-Pd has the highest activity. Photostabilities of the dicyanobacteriochlorins and other bacteriochlorins studied recently are investigated and discussed in terms of four phenomena: aggregation, reduction, oxidation and chemical reaction. Collectively, the results and analysis provide fundamental insights concerning the molecular design of PDT agents.
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Affiliation(s)
- Eunkyung Yang
- Department of Chemistry, Washington University, St. Louis, MO, USA
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42
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Aravindu K, Mass O, Vairaprakash P, Springer JW, Yang E, Niedzwiedzki DM, Kirmaier C, Bocian DF, Holten D, Lindsey JS. Amphiphilic chlorins and bacteriochlorins in micellar environments. Molecular design, de novo synthesis, and photophysical properties. Chem Sci 2013. [DOI: 10.1039/c3sc51335a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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43
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Aravindu K, Kim HJ, Taniguchi M, Dilbeck PL, Diers JR, Bocian DF, Holten D, Lindsey JS. Synthesis and photophysical properties of chlorins bearing 0–4 distinct meso-substituents. Photochem Photobiol Sci 2013; 12:2089-109. [DOI: 10.1039/c3pp50240f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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44
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Akhigbe J, Haskoor J, Krause JA, Zeller M, Brückner C. Formation, structure, and reactivity of meso-tetraaryl-chlorolactones, -porpholactams, and -chlorolactams, porphyrin and chlorin analogues incorporating oxazolone or imidazolone moieties. Org Biomol Chem 2013; 11:3616-28. [PMID: 23535718 DOI: 10.1039/c3ob40138c] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Joshua Akhigbe
- Department of Chemistry, University of Connecticut, Storrs, CT 06269-3060, USA
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45
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Sarkar S, Makhal A, Bora T, Lakhsman K, Singha A, Dutta J, Pal SK. Hematoporphyrin-ZnO nanohybrids: twin applications in efficient visible-light photocatalysis and dye-sensitized solar cells. ACS APPLIED MATERIALS & INTERFACES 2012. [PMID: 23186038 DOI: 10.1021/am302288m] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Light-harvesting nanohybrids (LHNs) are systems composed of an inorganic nanostructure associated with an organic pigment that have been exploited to improve the light-harvesting performance over individual components. The present study is focused on developing a potential LHN, attained by the functionalization of dense arrays of ZnO nanorods (NRs) with a biologically important organic pigment hematoporphyrin (HP), which is an integral part of red blood cells (hemoglobin). Application of spectroscopic techniques, namely, Fourier transform infrared spectroscopy (FTIR) and Raman scattering, confirm successful monodentate binding of HP carboxylic groups to Zn(2+) located at the surface of ZnO NRs. Picosecond-resolved fluorescence studies on the resulting HP-ZnO nanohybrid show efficient electron migration from photoexcited HP to the host ZnO NRs. This essential photoinduced event activates the LHN under sunlight, which ultimately leads to the realization of visible-light photocatalysis (VLP) of a model contaminant Methylene Blue (MB) in aqueous solution. A control experiment in an inert gas atmosphere clearly reveals that the photocatalytic activity is influenced by the formation of reactive oxygen species (ROS) in the media. Furthermore, the stable LHNs prepared by optimized dye loading have also been used as an active layer in dye-sensitized solar cells (DSSCs). We believe these promising LHNs to find their dual applications in organic electronics and for the treatment of contaminant wastewater.
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Affiliation(s)
- Soumik Sarkar
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 098, India
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46
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Chen CY, Sun E, Fan D, Taniguchi M, McDowell BE, Yang E, Diers JR, Bocian DF, Holten D, Lindsey JS. Synthesis and Physicochemical Properties of Metallobacteriochlorins. Inorg Chem 2012; 51:9443-64. [DOI: 10.1021/ic301262k] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Chih-Yuan Chen
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204,
United States
| | - Erjun Sun
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204,
United States
| | - Dazhong Fan
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204,
United States
| | - Masahiko Taniguchi
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204,
United States
| | - Brian E. McDowell
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204,
United States
| | - Eunkyung Yang
- Department
of Chemistry, Washington University, St.
Louis, Missouri 63130-4889, United States
| | - James R. Diers
- Department of Chemistry, University of California, Riverside, California 92521-0403, United
States
| | - David F. Bocian
- Department of Chemistry, University of California, Riverside, California 92521-0403, United
States
| | - Dewey Holten
- Department
of Chemistry, Washington University, St.
Louis, Missouri 63130-4889, United States
| | - Jonathan S. Lindsey
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204,
United States
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47
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Brückner C, Ogikubo J, McCarthy JR, Akhigbe J, Hyland MA, Daddario P, Worlinsky JL, Zeller M, Engle JT, Ziegler CJ, Ranaghan MJ, Sandberg MN, Birge RR. meso-arylporpholactones and their reduction products. J Org Chem 2012; 77:6480-94. [PMID: 22734444 DOI: 10.1021/jo300963m] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The rational syntheses of meso-tetraaryl-3-oxo-2-oxaporphyrins 5, known as porpholactones, via MnO(4)(-)-mediated oxidations of the corresponding meso-tetraaryl-2,3-dihydroxychlorins (7) is detailed. Since chlorin 7 is prepared from the parent porphyrin 1, this amounts to a 2-step replacement of a pyrrole moiety in 1 by an oxazolone moiety. The stepwise reduction of the porpholactone 5 results in the formation of chlorin analogues, meso-tetraaryl-3-hydroxy-2-oxachlorin (11) and meso-tetraaryl-2-oxachlorins (12). The reactivity of 11 with respect to nucleophilic substitution by O-, N-, and S-nucleophiles is described. The profound photophysical consequences of the formal replacement of a pyrrole with an oxazolone (porphyrin-like chromophore) or (substituted) oxazole moiety (chlorin-like chromophore with, for the parent oxazolochlorin 12, red-shifted Q(x) band with enhanced oscillator strengths) are detailed and rationalized on the basis of SAC-CI and MNDO-PSDCI molecular orbital theory calculations. The single crystal X-ray structures of the porpholactones point at a minor steric interaction between the carbonyl oxygen and the flanking phenyl group. The essentially planar structures of all chromophores in all oxidation states prove that the observed optical properties originate from the intrinsic electronic properties of the chromophores and are not subject to conformational modulation.
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Affiliation(s)
- Christian Brückner
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, USA.
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Ogikubo J, Meehan E, Engle JT, Ziegler CJ, Brückner C. meso-Aryl-3-alkyl-2-oxachlorins. J Org Chem 2012; 77:6199-207. [PMID: 22731999 DOI: 10.1021/jo300964v] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The formal replacement of a pyrrole moiety of meso-tetraarylporphyrin 1 by an oxazole moiety is described. The key step is the conversion of porpholactones 4 (prepared by a known two-step oxidation procedure from 1) by addition of alkyl Grignard reagent to form meso-tetraaryl-3-alkyl-2-oxachlorins 9 (alkyloxazolochlorins; alkyl = Me, Et, iPr). Hemiacetal 9 can be converted to an acetal, reduced to an ether, or converted to bis-alkyloxazolochlorins 11. The optical properties (UV-visible and fluorescence spectroscopy) are described. The chlorin-like optical properties of the alkyloxazolochlorins are compared to regular chlorins, such as 2,3-dihydroxychlorins and nonalkylated oxazolochlorins made by reduction from porpholactone 4. The conformations of the mono- and bis-alkylated 2-oxachlorins, as determined by single crystal X-ray diffractometry, are essentially planar, thus proving that their optical properties are largely due to their intrinsic electronic properties and not affected by conformational effects. The mono- and bis-3-alkyl-2-oxachlorins are a class of readily prepared and oxidatively stable chlorins.
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Affiliation(s)
- Junichi Ogikubo
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, USA
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Springer JW, Parkes-Loach PS, Reddy KR, Krayer M, Jiao J, Lee GM, Niedzwiedzki DM, Harris MA, Kirmaier C, Bocian DF, Lindsey JS, Holten D, Loach PA. Biohybrid Photosynthetic Antenna Complexes for Enhanced Light-Harvesting. J Am Chem Soc 2012; 134:4589-99. [DOI: 10.1021/ja207390y] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Pamela S. Parkes-Loach
- Department
of Molecular Biosciences, Northwestern University, Evanston, Illinois 60208-3500,
United States
| | - Kanumuri Ramesh Reddy
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina
27695-8204, United States
| | - Michael Krayer
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina
27695-8204, United States
| | - Jieying Jiao
- Department of Chemistry, University of California, Riverside, California 92521-0403,
United States
| | - Gregory M. Lee
- Department
of Molecular Biosciences, Northwestern University, Evanston, Illinois 60208-3500,
United States
| | | | | | | | - David F. Bocian
- Department of Chemistry, University of California, Riverside, California 92521-0403,
United States
| | - Jonathan S. Lindsey
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina
27695-8204, United States
| | | | - Paul A. Loach
- Department
of Molecular Biosciences, Northwestern University, Evanston, Illinois 60208-3500,
United States
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50
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Springer JW, Faries KM, Diers JR, Muthiah C, Mass O, Kee HL, Kirmaier C, Lindsey JS, Bocian DF, Holten D. Effects of Substituents on Synthetic Analogs of Chlorophylls. Part 3: The Distinctive Impact of Auxochromes at the 7- versus 3-Positions. Photochem Photobiol 2012; 88:651-74. [DOI: 10.1111/j.1751-1097.2012.01083.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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