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Kim D, Moon H, Baik SH, Singha S, Jun YW, Wang T, Kim KH, Park BS, Jung J, Mook-Jung I, Ahn KH. Two-Photon Absorbing Dyes with Minimal Autofluorescence in Tissue Imaging: Application to in Vivo Imaging of Amyloid-β Plaques with a Negligible Background Signal. J Am Chem Soc 2015; 137:6781-9. [PMID: 25951499 DOI: 10.1021/jacs.5b03548] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Fluorescence imaging of tissues offer an essential means for studying biological systems. Autofluorescence becomes a serious issue in tissue imaging under excitation at UV-vis wavelengths where biological molecules compete with the fluorophore. To address this critical issue, a novel class of fluorophores that can be excited at ∼900 nm under two-photon excitation conditions and emits in the red wavelength region (≥600 nm) has been disclosed. The new π-extended dipolar dye system shows several advantageous features including minimal autofluorescence in tissue imaging and pronounced solvent-sensitive emission behavior, compared with a widely used two-photon absorbing dye, acedan. As an important application of the new dye system, one of the dyes was developed into a fluorescent probe for amyloid-β plaques, a key biomarker of Alzheimer's disease. The probe enabled in vivo imaging of amyloid-β plaques in a disease-model mouse, with negligible background signal. The new dye system has great potential for the development of other types of two-photon fluorescent probes and tags for imaging of tissues with minimal autofluorescence.
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Affiliation(s)
- Dokyoung Kim
- †Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 790-784, Republic of Korea
| | - Hyunsoo Moon
- †Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 790-784, Republic of Korea
| | - Sung Hoon Baik
- ‡Department of Biochemistry and Biomedical Sciences, College of Medicine, Seoul National University, 103 Daehak-Ro, Jongro-Gu, Seoul 110-799, Republic of Korea
| | - Subhankar Singha
- †Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 790-784, Republic of Korea
| | - Yong Woong Jun
- †Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 790-784, Republic of Korea
| | - Taejun Wang
- §Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 790-784, Republic of Korea
| | - Ki Hean Kim
- §Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 790-784, Republic of Korea
| | - Byung Sun Park
- ⊥Department of Anatomy and Neurobiology, School of Medicine, Biomedical Science Institute, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul 130-701, Republic of Korea
| | - Junyang Jung
- ⊥Department of Anatomy and Neurobiology, School of Medicine, Biomedical Science Institute, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul 130-701, Republic of Korea
| | - Inhee Mook-Jung
- ‡Department of Biochemistry and Biomedical Sciences, College of Medicine, Seoul National University, 103 Daehak-Ro, Jongro-Gu, Seoul 110-799, Republic of Korea
| | - Kyo Han Ahn
- †Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 790-784, Republic of Korea
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Dean JC, Kusaka R, Walsh PS, Allais F, Zwier TS. Plant Sunscreens in the UV-B: Ultraviolet Spectroscopy of Jet-Cooled Sinapoyl Malate, Sinapic Acid, and Sinapate Ester Derivatives. J Am Chem Soc 2014; 136:14780-95. [PMID: 25295994 DOI: 10.1021/ja5059026] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jacob C. Dean
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Ryoji Kusaka
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Patrick S. Walsh
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Florent Allais
- AgroParisTech, Chaire Agro-Biotechnologies
Industrielles (ABI), 247
rue Paul Vaillant-Couturier, F-51100 Reims, France
- AgroParisTech, UMR 782 GMPA, Site de Grignon, F-78850 Thiverval-Grignon, France
- INRA, UMR 782 GMPA, Site de Grignon, F-78850 Thiverval-Grignon, France
| | - Timothy S. Zwier
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
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Ríos Vázquez S, Pérez Lustres JL, Rodríguez-Prieto F, Mosquera M, Ríos Rodríguez MC. Excited-State Proton and Charge Transfer in Protonated Amino and Methylated Derivatives of 2-(2′-Hydroxyphenyl)benzimidazole. J Phys Chem B 2014; 119:2475-89. [DOI: 10.1021/jp507917u] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Sonia Ríos Vázquez
- Departamento de Química
Física and Centro Singular de Investigación en Química
Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - J. Luis Pérez Lustres
- Departamento de Química
Física and Centro Singular de Investigación en Química
Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Flor Rodríguez-Prieto
- Departamento de Química
Física and Centro Singular de Investigación en Química
Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Manuel Mosquera
- Departamento de Química
Física and Centro Singular de Investigación en Química
Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - M. Carmen Ríos Rodríguez
- Departamento de Química
Física and Centro Singular de Investigación en Química
Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Betz T, Zinn S, Graneek JB, Schnell M. Nuclear quadrupole coupling constants of two chemically distinct nitrogen atoms in 4-aminobenzonitrile. J Phys Chem A 2014; 118:5164-9. [PMID: 24911139 PMCID: PMC4106272 DOI: 10.1021/jp410964w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
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The
rotational spectrum of 4-aminobenzonitrile in the gas phase
between 2 and 8.5 GHz is reported. Due to the two chemically distinct
nitrogen atoms, the observed transitions showed a rich hyperfine structure.
From the determination of the nuclear quadrupole coupling constants,
information about the electronic environment of these atoms could
be inferred. The results are compared to data for related molecules,
especially with respect to the absence of dual fluorescence in 4-aminobenzonitrile.
In addition, the two-photon ionization spectrum of this molecule was
recorded using a time-of-flight mass spectrometer integrated into
the setup. This new experimental apparatus is presented here for the
first time.
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Affiliation(s)
- Thomas Betz
- Max Planck Institute for the Structure and Dynamics of Matter , Luruper Chaussee 149, D-22761 Hamburg, Germany
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Catalan J. Reply to the comment on "On the dual emission of p-dimethylaminobenzonitrile and its photophysical implications" by J. Catalán, Phys. Chem. Chem. Phys., 2013, 15, 8811-8820. Phys Chem Chem Phys 2013; 15:16978-9. [PMID: 23962983 DOI: 10.1039/c3cp52985a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Javier Catalan
- Universidad Autonoma de Madrid, Departmento de Quimica Fisica Appl, Lab 203 C-II, Cantoblanco, 28049 Madrid, Spain.
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Young JW, Pozun ZD, Jordan KD, Pratt DW. Excited Electronic State Mixing in 7-Azaindole. Quantitative Measurements Using the Stark Effect. J Phys Chem B 2013; 117:15695-700. [DOI: 10.1021/jp406412f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Justin W. Young
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Zachary D. Pozun
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Kenneth D. Jordan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - David W. Pratt
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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Catalán J. On the dual emission of p-dimethylaminobenzonitrile and its photophysical implications. Phys Chem Chem Phys 2013; 15:8811-20. [PMID: 23639922 DOI: 10.1039/c3cp44627a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A solvatochromic analysis of available absorption and LE and TICT emission data in p-dimethylaminobenzonitrile (DMABN) was conducted. Applying the Abe method to the results of a thermochromic analysis of DMABN in 1-chlorobutane (ClB) allowed us to determine the polarizability and dipole moment of the excited electronic states involved in the absorption and emission transitions. As shown herein, the LE → TICT excited state reaction for DMABN is triggered by the solvent polarity but is additionally influenced by the viscosity. The experimental evidence negates the assumption that the radiative constant for the TICT fluorescence of DMABN is temperature-dependent.
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Affiliation(s)
- Javier Catalán
- Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain.
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Young JW, Vaquero-Vara V, Yi JT, Pratt DW, Moreno-Vargas G, Álvarez-Valtierra L. Using high resolution electronic spectroscopy to probe the effects of ring twist on charge transfer in 2-phenylindole and N-phenylcarbazole. Phys Chem Chem Phys 2013; 15:10251-7. [DOI: 10.1039/c3cp51403j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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