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Eivgi O, Ravenscroft AC, Blum SA. Imaging Block-Selective Copolymer Solvation. J Am Chem Soc 2023; 145:2058-2063. [PMID: 36689735 DOI: 10.1021/jacs.2c12576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Understanding individual-block solvation in self-assembled block copolymer systems is experimentally difficult, but this solvation underpins the assembly and disassembly observed at the bulk scale. Here, covalently attached viscosity-sensitive molecular rotors for fluorescence lifetime imaging microscopy uncover and quantitatively elucidate previously undisclosed differential block-selective responses toward solvation changes upon addition of DMSO and THF to self-assembled ROMP-based amphiphilic block copolymers. The sensitivity of this method provides unique information on block-selective solvent-triggered assembly and disassembly mechanisms, revealing behaviors invisible to or with superior sensitivity to traditional 1H NMR spectroscopy. These experiments demonstrate an analytical method and provide a granular mechanistic understanding, both suitable for fine tuning block copolymer assembly and disassembly processes.
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Affiliation(s)
- Or Eivgi
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Alexis C Ravenscroft
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Suzanne A Blum
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
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2
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Eivgi O, Blum SA. Real-Time Polymer Viscosity-Catalytic Activity Relationships on the Microscale. J Am Chem Soc 2022; 144:13574-13585. [PMID: 35866383 DOI: 10.1021/jacs.2c03711] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Polymer growth induces physical changes to catalyst microenvironments. Here, these physical changes are quantified in real time and are found to influence microscale chemical catalysis and the polymerization rate. By developing a method to "peer into" optically transparent living-polymer particles, simultaneous imaging of both viscosity changes and chemical activity was achieved for the first time with high spatiotemporal resolution through a combination of fluorescence intensity microscopy and fluorescence lifetime imaging microscopy techniques. Specifically, an increase in microenvironment viscosity led to a corresponding local decrease in the catalytic molecular ruthenium ring-opening metathesis polymerization rate, plausibly by restricting diffusional access to active catalytic centers. Consistent with this diffusional-access model, these viscosity changes were found to be monomer-dependent, showing larger changes in microenvironment viscosity in cross-linked polydicyclopentadiene compared to non-crosslinked polynorbornene. The sensitivity and high spatial resolution of the imaging technique revealed significant variations in microviscosities between different particles and subparticle regions. These revealed spatial heterogeneities would not be observable through alternative ensemble analytical techniques that provide sample-averaged measurements. The observed spatial heterogeneities provide a physical mechanism for variation in catalytic chemical activity on the microscale that may accumulate and lead to nonhomogeneous polymer properties on the bulk scale.
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Affiliation(s)
- Or Eivgi
- Department of Chemistry, University of California, Irvine, Irvine California 92697-2025, United States
| | - Suzanne A Blum
- Department of Chemistry, University of California, Irvine, Irvine California 92697-2025, United States
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Antina EV, Berezin MB, V’yugin AI, Guseva GB, Bumagina NA, Antina LA, Ksenofontov AA, Nuraneeva EN, Kalyagin AA, Bocharov PS, Lukanov MM, Krasovskaya ZS, Kalinkina VA, Dogadaeva SA. Chemistry and Practical Application of Dipyrromethene Ligands, Salts, and Coordination Compounds as Optical Sensors for Analytes of Various Nature (A Review). RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622030032] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Uvarov DY, Gorbatov SA, Kolokolova MK, Kozlov MA, Kolotirkina NG, Zavarzin IV, Goze C, Denat F, Volkova YA. A Straightforward Strategy for the Preparation of Diverse BODIPY Functionalized with Polyamines and Polyoxyethylenes**. ChemistrySelect 2022. [DOI: 10.1002/slct.202104210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Denis Y. Uvarov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, 47 Leninsky prosp. Moscow 119991, Russia
| | - Sergey A. Gorbatov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, 47 Leninsky prosp. Moscow 119991, Russia
| | - Marya K. Kolokolova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, 47 Leninsky prosp. Moscow 119991, Russia
| | - Mikhail A. Kozlov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, 47 Leninsky prosp. Moscow 119991, Russia
| | - Natalya G. Kolotirkina
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, 47 Leninsky prosp. Moscow 119991, Russia
| | - Igor V. Zavarzin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, 47 Leninsky prosp. Moscow 119991, Russia
| | - Christine Goze
- Institut de Chimie Moléculaire de l'Université de Bourgogne ICMUB UMR CNRS 6302 Université Bourgogne Franche-Comté, 9 avenue Alain Savary 21078 Dijon France
| | - Franck Denat
- Institut de Chimie Moléculaire de l'Université de Bourgogne ICMUB UMR CNRS 6302 Université Bourgogne Franche-Comté, 9 avenue Alain Savary 21078 Dijon France
| | - Yulia A. Volkova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, 47 Leninsky prosp. Moscow 119991, Russia
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Antina LA, Kalyagin AA, Ksenofontov AA, Pavelyev RS, Lodochnikova OA, Islamov DR, Berezin MB, Antina EV. Effects of ms-aryl substitution on the structure and spectral properties of new CH(Ar)-bis(BODIPY) luminophores. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 265:120393. [PMID: 34597923 DOI: 10.1016/j.saa.2021.120393] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
In this article, we present synthesis, spectral characteristics, and results of DFT calculations of new CH(R)-bis(BODIPY) 1-3. They are characterized by the conformational mobility and sensitivity of fluorescence to polarity, proton-, electron donor ability and viscosity of the solvation environment. It is shown that fluorescence intensity of 1-3 increases in the homologous series of alcohols (ethanol, 1-propanol, 1-butanol, 1-octanol, 1-decanol) mainly due to decrease of medium acidic properties. The viscosity of the medium effects on the 1-3 fluorescence in a lesser degree. Compared to 1 and 2, the 3 is the most sensitive towards viscosity both in low-viscosity homologous alcohols and in high-viscosity ethanol-glycerol mixtures. In this regard, the sensitivity of fluorescence of CH(MeOPh)-bis(BODIPY) (compound 3) to the viscosity was studied in binary mixtures of polar DMF and low-polarity toluene with castor and vaseline oils, as well as to the macroviscosity of the solvate environment in mixtures of toluene with polystyrene. Prospects of the practical application of CH(R)-bis(BODIPY)s are proposed for the analysis of polarity, proton-donor properties and viscosity of the medium.
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Affiliation(s)
- Lubov A Antina
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Str., 153045 Ivanovo, Russia.
| | - Alexander A Kalyagin
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Str., 153045 Ivanovo, Russia
| | - Alexander A Ksenofontov
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Str., 153045 Ivanovo, Russia
| | - Roman S Pavelyev
- Kazan Federal University, 18 Kremlyovskaya st., 420008 Kazan, Russian Federation
| | - Olga A Lodochnikova
- Kazan Federal University, 18 Kremlyovskaya st., 420008 Kazan, Russian Federation; Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov, 420088 Kazan, Russian Federation
| | - Daut R Islamov
- Kazan Federal University, 18 Kremlyovskaya st., 420008 Kazan, Russian Federation; Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov, 420088 Kazan, Russian Federation
| | - Mikhail B Berezin
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Str., 153045 Ivanovo, Russia
| | - Elena V Antina
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Str., 153045 Ivanovo, Russia
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Kijak M, Nawara K, Listkowski A, Masiera N, Buczyńska J, Urbańska N, Orzanowska G, Pietraszkiewicz M, Waluk J. 2 + 2 Can Make Nearly a Thousand! Comparison of Di- and Tetra- Meso-Alkyl-Substituted Porphycenes. J Phys Chem A 2020; 124:4594-4604. [PMID: 32423205 PMCID: PMC7590974 DOI: 10.1021/acs.jpca.0c02155] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two porphycenes, substituted at the meso positions with two and four methyl groups, respectively, reveal similar absorption spectra, but their photophysical properties are completely different. 9,20-dimethylporphycene emits fluorescence with about 20% quantum yield, independent of the solvent. In contrast, fluorescence of 9,10,19,20-tetramethylporphycene is extremely weak in nonviscous solvents, but it can be recovered by placing the chromophore in a rigid environment. We propose a model that explains these differences, based on calculations and structural analogies with other extremely weakly emitting derivatives, dibenzo[cde,mno]porphycenes. The efficient S1 deactivation involves delocalization of two inner cavity protons coupled with proton translocation toward a high-energy cis tautomer. The latter process leads to distortion from planarity. The probability of deactivation increases with the strength of the intramolecular NH···N hydrogen bonds. The model also explains the observation of biexponential fluorescence decay in weakly emitting porphycenes. It can be extended to other derivatives, in particular, the asymmetrically substituted ones. We also point to the possibility of using specific porphycenes as viscosity sensors, in particular, when working in single molecule regime.
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Affiliation(s)
- Michał Kijak
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Krzysztof Nawara
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
| | - Arkadiusz Listkowski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
| | - Natalia Masiera
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Joanna Buczyńska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Natalia Urbańska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Grażyna Orzanowska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Marek Pietraszkiewicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Jacek Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.,Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
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Kubánková M, Chambers JE, Huber RG, Bond PJ, Marciniak SJ, Kuimova MK. Linker length affects photostability of protein-targeted sensor of cellular microviscosity. Methods Appl Fluoresc 2019; 7:044004. [DOI: 10.1088/2050-6120/ab481f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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