1
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Li X, Wang D, Zhang Y, Lu W, Yang S, Hou G, Zhao Z, Qin H, Zhang Y, Li M, Qing G. A novel aggregation-induced enhanced emission aromatic molecule: 2-aminophenylboronic acid dimer. Chem Sci 2021; 12:12437-12444. [PMID: 34603674 PMCID: PMC8480421 DOI: 10.1039/d1sc03765j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 08/17/2021] [Indexed: 11/21/2022] Open
Abstract
Aggregation-induced enhanced emission (AIEE) molecules have significant applications in optoelectronics, biomedical probes and chemical sensors, and large amounts of AIEE molecules have been reported since the concept of AIEE was proposed. Most aromatic AIEE molecules have complex structures consisting of multiple aromatic rings and/or polycyclic skeletons. In this study, we find that 2-aminophenylboronic acid (2-APBA) with a simple structure is highly emissive in the solid state. Further studies reveal that 2-APBA exists in a dimeric form, and the 2-APBA dimer is a novel AIEE molecule. The underlying AIEE mechanism is that the 2-APBA dimeric units aggregate through intermolecular interactions to produce highly ordered molecular packing without the presence of π–π stacking interactions that would lead to aggregation-caused quenching. Furthermore, the 2-APBA dimer aggregates could reversibly transform into its non-fluorescent monomer form driven by new kinds of dynamic covalent B–N and B–O bonds, illustrating its good potential in molecular recognition, nanogating, chemo/bio-sensing and controlled drug release. The 2-APBA dimer tending to aggregate into a highly ordered structure is discovered to be AIEE active. Through alternate treatment with CO2 and N2, 2-APBA can switch between monomer and dimer aggregates driven by dynamic covalent B–N and B–O bonds.![]()
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Affiliation(s)
- Xiaopei Li
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China .,Instrumental Analysis Center, Dalian Polytechnic University Dalian 116034 P. R. China
| | - Dongdong Wang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Yongjie Zhang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Wenqi Lu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Songqiu Yang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Guangjin Hou
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Zhenchao Zhao
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Haijuan Qin
- Research Centre of Modern Analytical Technology, Tianjin University of Science and Technology Tianjin 300457 P. R. China
| | - Yahui Zhang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Minmin Li
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Guangyan Qing
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 P. R. China
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2
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Berberine derivatives as heteroatom induced hydrophobic sensor: An analytical approach for the selective and sensitive fluorometric detection and discrimination of serum albumins. Anal Chim Acta 2019; 1065:124-133. [DOI: 10.1016/j.aca.2019.03.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 03/07/2019] [Accepted: 03/12/2019] [Indexed: 12/19/2022]
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3
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Role of solvent H-bonding and polarity on photophysical properties of a benzothiazole-based ratiometric amyloid fibril sensor. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.12.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Kundu P, Chattopadhyay N. Unraveling the binding interaction of a bioactive pyrazole-based probe with serum proteins: Relative concentration dependent 1:1 and 2:1 probe-protein stoichiometries. Biophys Chem 2018; 240:70-81. [DOI: 10.1016/j.bpc.2018.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 05/31/2018] [Accepted: 06/02/2018] [Indexed: 11/17/2022]
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5
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Synthesis and properties of microenvironment-sensitive oligonucleotides containing a small fluorophore, 3-aminobenzonitrile or 3-aminobenzoic acid. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.10.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Horiuchi H, Sakai A, Akiyama S, Ikeda R, Ito S, Furuya M, Gomibuchi Y, Ichikawa M, Yoshihara T, Tobita S, Okutsu T. Extension of π-system of silylated porphyrin derivative for photodynamic therapy. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.02.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Afzal M, Kundu P, Das S, Ghosh S, Chattopadhyay N. A promising strategy for improved solubilization of ionic drugs simply by electrostatic pushing. RSC Adv 2017. [DOI: 10.1039/c7ra08056e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Addition of soluble salts to the SDS-bound phenosafranin induces electrostatic pushing of the probe within the micellar interior from its initial location at the micelle–water interface.
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Affiliation(s)
- Mohd Afzal
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Pronab Kundu
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Sinjan Das
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Saptarshi Ghosh
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
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8
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Takamatsu M, Fukase K, Oka R, Kitazume S, Taniguchi N, Tanaka K. A Reduction-Based Sensor for Acrolein Conjugates with the Inexpensive Nitrobenzene as an Alternative to Monoclonal Antibody. Sci Rep 2016; 6:35872. [PMID: 27782170 PMCID: PMC5080631 DOI: 10.1038/srep35872] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 10/05/2016] [Indexed: 11/21/2022] Open
Abstract
Acrolein, a highly toxic α, β-unsaturated aldehyde, has been a longstanding key biomarker associated with a range of disorders related to oxidative stresses. One of the most promising methods for detecting acrolein involves the use of antibodies that can recognize the acrolein-lysine conjugate, 3-formyl-3, 4-dehydropiperidines (FDP), within oxidatively stressed cells and tissues from various disease states. We have uncovered here that FDP could reduce nitroarenes in high yields at 100 °C in the presence of excess CaCl2 as a Lewis acid promoter. This unique transformation allowed for the development of a de novo method for detecting levels of FDPs generated from proteins in urine or blood serum samples. Thus we successfully converted a non-fluorescent and inexpensive 4-nitrophthalonitrile probe to the corresponding fluorescent aniline, thereby constituting the concept of fluorescent switching. Its sensitivity level (0.84 nmol/mL) is more than that of ELISA assays (3.13 nmol/mL) and is already equally reliable and reproducible at this early stage of development. More importantly, this method is cost effective and simple to operate, requiring only mixing of samples with a kit solution. Our method thus possesses potential as a future alternative to the more costly and operatively encumbered conventional antibody-based methods.
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Affiliation(s)
- Masayuki Takamatsu
- Biofunctional Synthetic Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Chemistry Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Koichi Fukase
- Department of Chemistry Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Ritsuko Oka
- Disease Glycomics Team, Global Research Cluster, RIKEN-Max Planck Joint Research Center for Systems Chemical Biology, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Shinobu Kitazume
- Disease Glycomics Team, Global Research Cluster, RIKEN-Max Planck Joint Research Center for Systems Chemical Biology, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Naoyuki Taniguchi
- Disease Glycomics Team, Global Research Cluster, RIKEN-Max Planck Joint Research Center for Systems Chemical Biology, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Katsunori Tanaka
- Biofunctional Synthetic Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Biofunctional Chemistry Laboratory, A. Butlerov Institute of Chemistry, Kazan Federal University, 18 Kremlyovskaya street, Kazan 420008, Russia
- Japan Science and Technology Agency-PRESTO, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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9
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Escudero D. Revising Intramolecular Photoinduced Electron Transfer (PET) from First-Principles. Acc Chem Res 2016; 49:1816-24. [PMID: 27575871 DOI: 10.1021/acs.accounts.6b00299] [Citation(s) in RCA: 166] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Photoinduced electron transfer (PET) plays relevant roles in many areas of chemistry, including charge separation processes in photovoltaics, natural and artificial photosynthesis, and photoluminescence sensors and switches. As in many other photochemical scenarios, the structural and energetic factors play relevant roles in determining the rates and efficiencies of PET and its competitive photodeactivation processes. Particularly, in the field of fluorescent sensors and switches, intramolecular PET is believed (in many cases without compelling experimental proof) to be responsible of the quench of fluorescence. There is an increasing experimental interest in fluorophore's molecular design and on achieving optimal excitation/emission spectra, excitation coefficients, and fluorescence quantum yields (importantly for bioimaging purposes), but less efforts are devoted to fundamental mechanistic studies. In this Account, I revise the origins of the fluorescence quenching in some of these systems with state-of-the-art quantum chemical tools. These studies go beyond the common strategy of analyzing frontier orbital energy diagrams and performing PET thermodynamics calculations. Instead, the potential energy surfaces (PESs) of the lowest-lying excited states are explored with time-dependent density functional theory (TD-DFT) and complete active space self-consistent field (CASSCF) calculations and the radiative and nonradiative decay rates from the involved excited states are computed from first-principles using a thermal vibration correlation function formalism. With such a strategy, this work reveals the real origins of the fluorescence quenching, herein entitled as dark-state quenching. Dark states (those that do not absorb or emit light) are often elusive to experiments and thus, computational investigations can provide novel insights into the actual photodeactivation mechanisms. The success of the dark-state quenching mechanism is demonstrated for a wide variety of fluorescent probes, including proton, cation and anion targets. Furthermore, this mechanism provides a general picture of the fluorescence quenching which englobes intramolecular charge-transfer (ICT), ratiometric quenching, and those radiationless mechanisms believed to be originated by PET. Finally, this Account provides for the first time a computational protocol to quantitatively estimate this phenomenon and provides the ingredients for the optimal design of fluorescent probes from first principles.
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Affiliation(s)
- Daniel Escudero
- CEISAM UMR CNRS
6230, Université de Nantes, 2 rue de la Houssinière, BP 92208, 44322 Cedex 3 Nantes, France
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10
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Chatterjee KS, Pati AK, Mishra AK. Meta Effect of Absorption Energy in Donor–Acceptor Substituted Benzenoids: A Computational Study of Its Dependence on Acceptor Strength, Solvent Polarity, and Conjugation Length. J Org Chem 2014; 79:8715-22. [DOI: 10.1021/jo501507u] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kiran Sankar Chatterjee
- Department
of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Avik Kumar Pati
- Department
of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Ashok K. Mishra
- Department
of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
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11
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Ghosh S, Chakrabarty S, Bhowmik D, Kumar GS, Chattopadhyay N. Stepwise Unfolding of Bovine and Human Serum Albumin by an Anionic Surfactant: An Investigation Using the Proton Transfer Probe Norharmane. J Phys Chem B 2014; 119:2090-102. [DOI: 10.1021/jp501150p] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saptarshi Ghosh
- Department
of Chemistry, Jadavpur University, Kolkata 700 032, India
| | | | - Debipreeta Bhowmik
- Biophysical
Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
| | - Gopinatha Suresh Kumar
- Biophysical
Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
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12
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Jana B, Ghosh S, Chattopadhyay N. Competitive binding of nile red between lipids and β-cyclodextrin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 126:1-10. [PMID: 23871993 DOI: 10.1016/j.jphotobiol.2013.06.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/10/2013] [Accepted: 06/11/2013] [Indexed: 11/30/2022]
Abstract
Fluorometric measurements are exploited to explore the binding interactions of nile red (NR) with anionic lipid dimyristoyl-L-α-phosphatidylglycerol (DMPG), zwitterionic lipid dimyristoyl-L-α-phosphatidylcholine (DMPC) as well as neutral cyclic oligosaccharide β-cyclodextrin (β-CD) solutions. The binding constants are found to be quite high and comparable (within a factor of five). Series of spectral techniques like steady state fluorescence and fluorescence anisotropy study, micropolarity study, quenching study and time resolved experiments reveal that the addition of β-CD to the probe-lipid complexes results in weakening of the lipid-probe interaction and formation of probe-β-CD inclusion complexes leading to the removal of some of the probe (NR) molecules from the lipid environments. The extent of removal of NR is, however, more from DMPG than DMPC lipid. The phenomena are explained from the concept of competitive binding of the probe between the lipids and β-CD. Since lipids are the principal constituents of the cell walls, the work might make a foundation for the possible removal of excess of molecules like nile red adsorbed on the cell walls.
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Affiliation(s)
- Barnali Jana
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
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13
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Murase T, Yoshihara T, Yamada K, Tobita S. Fluorescent Peptides Labeled with Environment-Sensitive 7-Aminocoumarins and Their Interactions with Lipid Bilayer Membranes and Living Cells. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20120314] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Tokiko Murase
- Department of Chemistry and Chemical Biology, Gunma University
| | | | - Keiichi Yamada
- Department of Chemistry and Chemical Biology, Gunma University
| | - Seiji Tobita
- Department of Chemistry and Chemical Biology, Gunma University
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14
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Kobayashi A, Takehira K, Yoshihara T, Uchiyama S, Tobita S. Remarkable fluorescence enhancement of benzo[g]chromen-2-ones induced by hydrogen-bonding interactions with protic solvents. Photochem Photobiol Sci 2012; 11:1368-76. [DOI: 10.1039/c2pp25055a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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15
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Angulo G, Dobkowski J, Kapturkiewicz A. Luminescence properties of diamino-dicyano substituted benzene and 1,4-pyrazine. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.09.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Sytina OA, Novoderezhkin VI, van Grondelle R, Groot ML. Modeling of multi-exciton transient absorption spectra of protochlorophyllide aggregates in aqueous solution. J Phys Chem A 2011; 115:11944-51. [PMID: 21936513 DOI: 10.1021/jp204395z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Protochlorophyllide (Pchlide) is a natural porphyrin, a precursor of chlorophyll, synthesized by plants for its photosynthetic apparatus. The pigment spontaneously forms aggregates when dissolved in neat water solution. We present here calculations of the transient absorption spectra and its comprising components (ground-state bleach, stimulated emission, and excited-state absorption) for a strongly excitonically coupled linear chain of four Pchlide chromophores, using exciton theory with phenomenological Gaussian line shapes and without energetic disorder. A refined multiexciton model that includes static disorder is applied to fit the experimental power-dependent transient absorption spectra of aqueous protochlorophyllide and the kinetics for delay times up to 20 ps after photoexcitation. We show that population up to the 4-exciton manifold is sufficient to explain the pronounced saturation of the bleaching and the shape changes in the instantaneous, t = 0.2 ps transient spectra when the pulse energy is increased from 10 to 430 nJ per pulse. The decay of the multiexciton manifold is relatively slow and is preceded by a spectroscopically distinct process. We suggest that the exciton states in the Pchlide aggregates are mixed with charge-transfer states (CTS) and that the population and repopulation of the CTS coupled to the exciton states explains the relatively slow decay of the multiexciton manifold. The relevance of our results to the optical properties and dynamics of natural photosynthetic complexes and the possible physical origin of CTS formation are discussed.
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Affiliation(s)
- Olga A Sytina
- Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, The Netherlands.
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17
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18
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Fakhari M. A, Rokita SE. A new solvatochromic fluorophore for exploring nonpolar environments created by biopolymers. Chem Commun (Camb) 2011; 47:4222-4. [DOI: 10.1039/c0cc04917d] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Zachariasse KA, Druzhinin SI, Galievsky VA, Demeter A, Allonas X, Kovalenko SA, Senyushkina TA. Pentacyano-N,N-Dimethylaniline in the Excited State. Only Locally Excited State Emission, in Spite of the Large Electron Affinity of the Pentacyanobenzene Subgroup. J Phys Chem A 2010; 114:13031-9. [DOI: 10.1021/jp108804q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Klaas A. Zachariasse
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospekt Nezavisimosti 68, 22072 Minsk, Belarus, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, Département de Photochimie Générale, UMR CNRS 7525, Université de Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093
| | - Sergey I. Druzhinin
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospekt Nezavisimosti 68, 22072 Minsk, Belarus, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, Département de Photochimie Générale, UMR CNRS 7525, Université de Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093
| | - Victor A. Galievsky
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospekt Nezavisimosti 68, 22072 Minsk, Belarus, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, Département de Photochimie Générale, UMR CNRS 7525, Université de Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093
| | - Attila Demeter
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospekt Nezavisimosti 68, 22072 Minsk, Belarus, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, Département de Photochimie Générale, UMR CNRS 7525, Université de Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093
| | - Xavier Allonas
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospekt Nezavisimosti 68, 22072 Minsk, Belarus, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, Département de Photochimie Générale, UMR CNRS 7525, Université de Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093
| | - Sergey A. Kovalenko
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospekt Nezavisimosti 68, 22072 Minsk, Belarus, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, Département de Photochimie Générale, UMR CNRS 7525, Université de Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093
| | - Tamara A. Senyushkina
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospekt Nezavisimosti 68, 22072 Minsk, Belarus, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, Département de Photochimie Générale, UMR CNRS 7525, Université de Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093
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20
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Zheng C, Xu X, He F, Li L, Wu B, Yu G, Liu Y. Preparation of high-quality organic semiconductor nanoparticle films by solvent-evaporation-induced self-assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:16730-16736. [PMID: 20942425 DOI: 10.1021/la103449q] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Organic semiconductor nanoparticles are expected to be used in organic optical and electronic devices due to their unique optical and electrical properties. However, no method has been reported for the preparation of high-quality organic nanoparticle films without remaining additives and being capable of dealing with binary nanoparticle blends. We developed a simple approach to fabricate high-quality organic semiconductor nanoparticle films from their aqueous solutions by solvent-evaporation-induced self-assembly. Only volatile solvents are employed in the nanoparticle solutions, so the self-assembled nanoparticle films are free of additives. Moreover, this method is also suitable for fabricating thin films containing binary nanoparticles. Therefore, it paves the way for potential applications of organic semiconductor nanoparticles in nanoscale optical and electronic devices.
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Affiliation(s)
- Changchun Zheng
- State Key Laboratory of Advanced Metal and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
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21
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Jiao L, Meng T, Chen Y, Zhang M, Wang X, Hao E. Triazolyl-linked 8-Hydroxyquinoline Dimer as a Selective Turn-on Fluorosensor for Cd2+. CHEM LETT 2010. [DOI: 10.1246/cl.2010.803] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Sarkar D, Bose D, Mahata A, Ghosh D, Chattopadhyay N. Differential Interaction of β-Cyclodextrin with Lipids of Varying Surface Charges: A Spectral Deciphering Using a Cationic Phenazinium Dye. J Phys Chem B 2010; 114:2261-9. [DOI: 10.1021/jp9081867] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Deboleena Sarkar
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Debosreeta Bose
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Atanu Mahata
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Debanjana Ghosh
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
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Bose D, Ghosh D, Das P, Girigoswami A, Sarkar D, Chattopadhyay N. Binding of a cationic phenazinium dye in anionic liposomal membrane: a spectacular modification in the photophysics. Chem Phys Lipids 2010; 163:94-101. [DOI: 10.1016/j.chemphyslip.2009.10.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 09/04/2009] [Accepted: 10/16/2009] [Indexed: 12/01/2022]
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Kaneko S, Yotoriyama S, Koda H, Tobita S. Excited-state proton transfer to solvent from phenol and cyanophenols in water. J Phys Chem A 2009; 113:3021-8. [PMID: 19265389 DOI: 10.1021/jp8086489] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The excited-state proton transfer (ESPT) to solvent from phenol (PhOH) and cyanophenols (CNOHs) in water was studied by means of time-resolved fluorescence and photoacoustic spectroscopy. A characteristic property of PhOH and CNOHs is that the fluorescence quantum yields of the deprotonated forms are remarkably small (< or = 10(-3)) and the lifetimes are extremely short (< or = 30 ps). Time-resolved fluorescence measurements for PhOH, CNOHs, and their methoxy analogues at 298 K indicate that o- and m-cyanophenols (o- and m-CNOH) undergo rapid ESPT to the solvent water with rate constants of 6.6 x 10(10) and 2.6 x 10(10) s(-1), respectively, whereas the fluorescence properties of PhOH and p-CNOH does not exhibit clear evidence of the ESPT reaction. Photoacoustic measurements show that photoexcitation of o- and m-CNOH in water results in negative volume changes, supporting the occurrence of ESPT to produce a geminate ion pair. In contrast, the volume contractions for the PhOH and p-CNOH solutions are negligibly small, which indicates that, in these compounds, the yields of solvent-separated ion pairs resulting from the ESPT are very small. The volume change per absorbed Einstein (DeltaV(r)) for o-CNOH is obtained to be -5.0 mL Einstein(-1), which is much smaller than the estimated volume contraction per photoconverted mole (DeltaV(R)). This suggests that the geminate recombination between the ejected proton and the cyanophenolate anion occurs after rapid deactivation of the excited ion pair. In the temperature range between 275 and 323 K, the proton dissociation rates of o- and m-CNOH in H(2)O and D(2)O are slower than the solvent relaxation rates evaluated from the Debye dielectric relaxation time, indicating that the overall rate constant is determined mainly by the proton motion along the reaction coordinate.
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Affiliation(s)
- Shigeo Kaneko
- Department of Chemistry and Chemical Biology, Gunma University, Kiryu, Gunma 376-8515, Japan
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25
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Kaneko S, Yoshihara T, Tobita S. The Rate of Excited-state Proton Transfer to Solvent from Trifluoromethylphenols in Water. CHEM LETT 2009. [DOI: 10.1246/cl.2009.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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26
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Sherin PS, Grilj J, Tsentalovich YP, Vauthey E. Ultrafast Excited-State Dynamics of Kynurenine, a UV Filter of the Human Eye. J Phys Chem B 2009; 113:4953-62. [DOI: 10.1021/jp900541b] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter S. Sherin
- International Tomography Center SB RAS, Institutskaya 3a, 630090 Novosibirsk, Russia, and Department of Physical Chemistry, University of Geneva, 30 quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - Jakob Grilj
- International Tomography Center SB RAS, Institutskaya 3a, 630090 Novosibirsk, Russia, and Department of Physical Chemistry, University of Geneva, 30 quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - Yuri P. Tsentalovich
- International Tomography Center SB RAS, Institutskaya 3a, 630090 Novosibirsk, Russia, and Department of Physical Chemistry, University of Geneva, 30 quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - Eric Vauthey
- International Tomography Center SB RAS, Institutskaya 3a, 630090 Novosibirsk, Russia, and Department of Physical Chemistry, University of Geneva, 30 quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
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Fdez. Galván I, Elena Martín M, Muñoz-Losa A, Aguilar MA. Solvatochromic Shifts on Absorption and Fluorescence Bands of N,N-Dimethylaniline. J Chem Theory Comput 2009; 5:341-9. [DOI: 10.1021/ct800434j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ignacio Fdez. Galván
- Química Física, Edif. José María Viguera Lobo, Universidad de Extremadura, Avda. de Elvas s/n, 06071 Badajoz, Spain, and Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Pisa, Via Risorgimento 35, 56126 Pisa, Italy
| | - M. Elena Martín
- Química Física, Edif. José María Viguera Lobo, Universidad de Extremadura, Avda. de Elvas s/n, 06071 Badajoz, Spain, and Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Pisa, Via Risorgimento 35, 56126 Pisa, Italy
| | - Aurora Muñoz-Losa
- Química Física, Edif. José María Viguera Lobo, Universidad de Extremadura, Avda. de Elvas s/n, 06071 Badajoz, Spain, and Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Pisa, Via Risorgimento 35, 56126 Pisa, Italy
| | - Manuel A. Aguilar
- Química Física, Edif. José María Viguera Lobo, Universidad de Extremadura, Avda. de Elvas s/n, 06071 Badajoz, Spain, and Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Pisa, Via Risorgimento 35, 56126 Pisa, Italy
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28
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Suzuki K, Kobayashi A, Kaneko S, Takehira K, Yoshihara T, Ishida H, Shiina Y, Oishi S, Tobita S. Reevaluation of absolute luminescence quantum yields of standard solutions using a spectrometer with an integrating sphere and a back-thinned CCD detector. Phys Chem Chem Phys 2009; 11:9850-60. [DOI: 10.1039/b912178a] [Citation(s) in RCA: 730] [Impact Index Per Article: 48.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Das P, Sarkar D, Chattopadhyay N. Photophysics of a β-carboline based non-ionic probe in anionic and zwitterionic liposome membranes. Chem Phys Lipids 2008; 154:38-45. [DOI: 10.1016/j.chemphyslip.2008.03.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Revised: 02/27/2008] [Accepted: 03/03/2008] [Indexed: 10/22/2022]
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30
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Endo A, Suzuki K, Yoshihara T, Tobita S, Yahiro M, Adachi C. Measurement of photoluminescence efficiency of Ir(III) phenylpyridine derivatives in solution and solid-state films. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.05.064] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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31
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Han F, Chi L, Wu W, Liang X, Fu M, Zhao J. Environment sensitive phenothiazine dyes strongly fluorescence in protic solvents. J Photochem Photobiol A Chem 2008. [DOI: 10.1016/j.jphotochem.2007.11.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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32
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Druzhinin SI, Dubbaka SR, Knochel P, Kovalenko SA, Mayer P, Senyushkina T, Zachariasse KA. Ultrafast Intramolecular Charge Transfer with Strongly Twisted Aminobenzonitriles: 4-(Di-tert-butylamino)benzonitrile and 3-(Di-tert-butylamino)benzonitrile. J Phys Chem A 2008; 112:2749-61. [DOI: 10.1021/jp7097526] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sergey I. Druzhinin
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany, and Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor Strasse 2, 12489 Berlin, Germany
| | - Srinivas Reddy Dubbaka
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany, and Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor Strasse 2, 12489 Berlin, Germany
| | - Paul Knochel
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany, and Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor Strasse 2, 12489 Berlin, Germany
| | - Sergey A. Kovalenko
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany, and Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor Strasse 2, 12489 Berlin, Germany
| | - Peter Mayer
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany, and Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor Strasse 2, 12489 Berlin, Germany
| | - Tamara Senyushkina
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany, and Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor Strasse 2, 12489 Berlin, Germany
| | - Klaas A. Zachariasse
- Max-Planck-Institut für biophysikalische Chemie, Spektroskopie und Photochemische Kinetik, 37070 Göttingen, Germany, Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, Haus F, 81377 München, Germany, and Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor Strasse 2, 12489 Berlin, Germany
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Pál K, Kállay M, Köhler G, Zhang H, Bitter I, Kubinyi M, Vidóczy T, Grabner G. Efficient singlet-state deactivation of cyano-substituted indolines in protic solvents via CN--HO hydrogen bonds. Chemphyschem 2008; 8:2627-35. [PMID: 18058777 DOI: 10.1002/cphc.200700479] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The photophysical properties of indoline (I) and three of its derivatives, namely, N-methylindoline (MI), 5-cyanoindoline (CI), and 5-cyano-N-methylindoline (CMI), are studied in H-donating solvents of varying polarity. Based on measurements of fluorescence yield and lifetime, and of triplet yield and hydrated-electron formation, two distinct mechanisms of solvent-induced fluorescence quenching are evidenced. The first mechanism involves the cyano substituent and leads to an increase in the rate constant of internal conversion of one order of magnitude in ethanolic solution and of more than two orders of magnitude in water, as compared to solutions in n-hexane or acetonitrile. A similar trend had previously been observed in the case of 4-N,N-dimethylaminobenzonitrile (DMABN). The second mechanism reduces the fluorescence lifetimes of the non-cyanated derivatives in aqueous solution by one order of magnitude and is related to the formation of hydrated electrons. Neither of these mechanisms is influenced by methylation at the ring nitrogen. Quantum chemical calculations are performed on the ground and excited states of the hydrogen-bonded complexes between protic solvents and MI as well as CMI. Stable hydrogen-bonded configurations involving the CN substituent and a solvent OH group are found; these configurations are stable both in the ground and the first excited singlet states, whereas the corresponding complex at the ring amino nitrogen is stable in the ground state only. The CN--HO configuration is therefore a prime candidate for a mechanistic explanation of the observed quenching by the first mechanism. These findings may have useful applications for the design of fluorescence probes for water in biological systems.
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Affiliation(s)
- Krisztina Pál
- Vidóczy, Institute of Structural Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary
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Xu X, Chen S, Li L, Yu G, Di C, Liu Y. Photophysical properties of polyphenylphenyl compounds in aqueous solutions and application of their nanoparticles for nucleobase sensing. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b801984c] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Das P, Chakrabarty A, Mallick A, Chattopadhyay N. Photophysics of a Cationic Biological Photosensitizer in Anionic Micellar Environments: Combined Effect of Polarity and Rigidity. J Phys Chem B 2007; 111:11169-76. [PMID: 17784745 DOI: 10.1021/jp073984o] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A steady-state and time-resolved photophysical study of a cationic phenazinium dye, phenosafranin (PSF), has been investigated in well-characterized biomimetic micellar nanocavities formed by anionic surfactants of varying chain lengths, namely, sodium decyl sulfate (S(10)S), sodium dodecyl sulfate (S(12)S), and sodium tetradecyl sulfate (S(14)S). In all these micellar environments, the charge transfer fluorescence of PSF shows a large hypsochromic shift along with an enhancement in the fluorescence quantum yield as compared to that in aqueous medium. A reduction in the nonradiative deactivation rate within the hydrophobic interior of micelles led to an increase in the fluorescence yield and lifetime. The present work shows the degree of accessibility of the fluorophore toward the ionic quencher in the presence of surfactants of different surfactant chain lengths. The fluorometric and fluorescence quenching studies suggest that the fluorophore resides at the micelle-water interfacial region. The enhancements in the fluorescence anisotropy and rotational relaxation time of the probe in all the micellar environments from the pure aqueous solution suggest that the fluorophore binds in motionally restricted regions introduced by the micelles. Polarity and viscosity of the microenvironments around the probe in the micellar systems have been determined. The work has paid proper attention to the hydrophobic effect of the surfactant chain length on photophysical observations.
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Affiliation(s)
- Paramita Das
- Department of Chemistry, Jadavpur University, Calcutta 700 032, India
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Das P, Chakrabarty A, Haldar B, Mallick A, Chattopadhyay N. Effect of cyclodextrin nanocavity confinement on the photophysics of a beta-carboline analogue: a spectroscopic study. J Phys Chem B 2007; 111:7401-8. [PMID: 17530799 DOI: 10.1021/jp072142m] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Interaction of a beta-carboline based biologically active molecule, 3-acetyl-4-oxo-6,7-dihydro-12H indolo-[2,3-a] quinolizine (AODIQ), with alpha-, beta-, and gamma-cyclodextrins (CDs) in aqueous solution has been studied using steady state and time-resolved fluorescence and steady-state fluorescence anisotropy techniques. Polarity dependent intramolecular charge transfer (ICT) process is responsible for the remarkable sensitivity of this biological fluorophore to the CD environments. Upon encapsulation, the CT fluorescence exhibits hypsochromic shift along with enhancements in the fluorescence yield, fluorescence anisotropy (r), and fluorescence lifetime. The reduction in the nonradiative deactivation rate of the fluorophore within the CD nanocavities leads to an increase in both fluorescence yield and lifetime. Among the three CDs, gamma-CD shows the most spectacular confinement effect. The results establish the formation of 1:1 AODIQ:CD inclusion complexes in alpha- and beta-CDs. In aqueous gamma-CD solutions, however, depending on the concentration of the gamma-CD, formation of both 1:1 and 1:2 complexes have been revealed. Hydrodynamic radii of the 1:1 and 1:2 probe-gamma-CD supramolecular complexes have also been determined.
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Affiliation(s)
- Paramita Das
- Department of Chemistry, Jadavpur University, Calcutta, India
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Oshima J, Tsujimoto H, Yoshihara T, Yamada K, Katakai R, Tobita S. Photophysical Properties of 3-[2-Cyano-4-(dimethylamino)phenyl]alanine: A Highly Fluorescent and Environment-sensitive Amino Acid with Small Molecular Size. CHEM LETT 2006. [DOI: 10.1246/cl.2006.620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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Oshima J, Yoshihara T, Tobita S. Water-induced fluorescence quenching of mono- and dicyanoanilines. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.03.073] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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