1
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Oliden-Sánchez A, Sola-Llano R, Pérez-Pariente J, Gómez-Hortigüela L, Martínez-Martínez V. Confinement of a Styryl Dye into Nanoporous Aluminophosphates: Channels vs. Cavities. Int J Mol Sci 2024; 25:3577. [PMID: 38612388 PMCID: PMC11011965 DOI: 10.3390/ijms25073577] [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: 02/09/2024] [Revised: 03/07/2024] [Accepted: 03/13/2024] [Indexed: 04/14/2024] Open
Abstract
Styryl dyes are generally poor fluorescent molecules inherited from their flexible molecular structures. However, their emissive properties can be boosted by restricting their molecular motions. A tight confinement into inorganic molecular sieves is a good strategy to yield highly fluorescent hybrid systems. In this work, we compare the confinement effect of two Mg-aluminophosphate zeotypes with distinct pore systems (the AEL framework, a one-dimensional channeled structure with elliptical pores of 6.5 Å × 4.0 Å, and the CHA framework, composed of large cavities of 6.7 Å × 10.0 Å connected by eight-ring narrower windows) for the encapsulation of 4-DASPI styryl dye (trans-4-[4-(Dimethylamino)styryl]-1-methylpyridinium iodide). The resultant hybrid systems display significantly improved photophysical features compared to 4-DASPI in solution as a result of tight confinement in both host inorganic frameworks. Molecular simulations reveal a tighter confinement of 4-DASPI in the elliptical channels of AEL, explaining its excellent photophysical properties. On the other hand, a singular arrangement of 4-DASPI dye is found when confined within the cavity-based CHA framework, where the 4-DASPI molecule spans along two adjacent cavities, with each aromatic ring sitting on these adjacent cavities and the polymethine chain residing within the narrower eight-ring window. However, despite the singularity of this host-guest arrangement, it provides less tight confinement for 4-DASPI than AEL, resulting in a slightly lower quantum yield.
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Affiliation(s)
- Ainhoa Oliden-Sánchez
- Departamento de Química Física, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080 Bilbao, Spain; (A.O.-S.); (R.S.-L.)
| | - Rebeca Sola-Llano
- Departamento de Química Física, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080 Bilbao, Spain; (A.O.-S.); (R.S.-L.)
| | - Joaquín Pérez-Pariente
- Instituto de Catálisis y Petroleoquímica (CSIC), c/Marie Curie 2, Cantoblanco, 28049 Madrid, Spain;
| | - Luis Gómez-Hortigüela
- Instituto de Catálisis y Petroleoquímica (CSIC), c/Marie Curie 2, Cantoblanco, 28049 Madrid, Spain;
| | - Virginia Martínez-Martínez
- Departamento de Química Física, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080 Bilbao, Spain; (A.O.-S.); (R.S.-L.)
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2
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Xu L, Xu W, Tian Z, Deng F, Huang Y. Sustainable natural chlorogenic acid as a functional molecular sensor toward viscosity detection in liquids. PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES : OFFICIAL JOURNAL OF THE EUROPEAN PHOTOCHEMISTRY ASSOCIATION AND THE EUROPEAN SOCIETY FOR PHOTOBIOLOGY 2023:10.1007/s43630-023-00365-w. [PMID: 36694012 DOI: 10.1007/s43630-023-00365-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 01/11/2023] [Indexed: 01/26/2023]
Abstract
Liquids are perishable at ease during the long-term transportation and storage processes, non-invasive and in situ inspection method is urgent to be developed. In consideration of the important role of viscosity, one kind of sustainable natural product chlorogenic acid (CA) extracted from honeysuckle has been used as a versatile optical sensor for viscosity determination during the liquid spoilage process. The natural molecule was conducted by the O-diphenyl and carboxylic acid ester groups in coincidence, a typical twisted intramolecular charge transfer phenomenon was formed. This sensor features wide adaptability, high selectivity, good sensitivity, and excellent photo stability in various liquids. And CA displays a larger Stokes shift, high viscosity sensitive coefficient (0.62), and narrower energy band. The rotatable conjugate structure can be acted as the recognition site, and the bright fluorescent signal of CA is specifically activated when in the high viscous micro-environment. Inspired by this objective phenomenon, CA has been applied to detect the thickening efficiency of various food thickeners. More importantly, the viscosity fluctuations during the deterioration stage of liquids can be screened through non-invasive and in situ monitoring. We expected that more natural products can be developed as molecular tools for liquids safety investigation, and fluorescent analytical methods can be expanded toward interdisciplinary research.
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Affiliation(s)
- Lingfeng Xu
- Key Laboratory of Biodiversity and Ecological Engineering of Jiangxi Province, Jinggangshan University, Ji'an, 343009, Jiangxi, China. .,State Key Laboratory of Luminescent Materials and Devices, College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Wenyan Xu
- Key Laboratory of Biodiversity and Ecological Engineering of Jiangxi Province, Jinggangshan University, Ji'an, 343009, Jiangxi, China
| | - Ziyin Tian
- Key Laboratory of Biodiversity and Ecological Engineering of Jiangxi Province, Jinggangshan University, Ji'an, 343009, Jiangxi, China
| | - Fei Deng
- Key Laboratory of Biodiversity and Ecological Engineering of Jiangxi Province, Jinggangshan University, Ji'an, 343009, Jiangxi, China
| | - Yanrong Huang
- School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou, 510640, China
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3
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Mirzahossein E, Grzelka M, Guerton F, Bonn D, Brown R. Adsorption of a water-soluble molecular rotor fluorescent probe on hydrophobic surfaces. Sci Rep 2022; 12:22197. [PMID: 36564458 PMCID: PMC9789158 DOI: 10.1038/s41598-022-26722-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Environmentally sensitive molecular rotors are widely used to probe the local molecular environment in e.g. polymer solutions, polymer glasses, and biological systems. These applications make it important to understand its fluorescence properties in the vicinity of a solid surface, since fluorescence microscopy generically employs cover slides, and measurements are often done in its immediate vicinity. Here, we use a confocal microscope to investigate the fluorescence of (4-DASPI) in glycerol/water solutions close to the interface using hydrophilic or hydrophobic cover slips. Despite the dye's high solubility in water, the observed lengthening of the fluorescence lifetime close to the hydrophobic surface, implies a surprising affinity of the dye with the surface. Because the homogeneous solution and the refractive index mismatch reduces the optical sectioning power of the microscope, we quantify the affinity with the help of a simple model of the signal vs. depth of focus, exhibiting surface and bulk contributions. The model reduces artefacts due to refractive index mismatch, as supported by Monte Carlo ray tracing simulations.
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Affiliation(s)
- Elham Mirzahossein
- grid.7177.60000000084992262Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, 1098XH Amsterdam, The Netherlands
| | - Marion Grzelka
- grid.7177.60000000084992262Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, 1098XH Amsterdam, The Netherlands
| | - Fabrice Guerton
- grid.5571.60000 0001 2289 818XUniversité de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPRA, Pau, France
| | - Daniel Bonn
- grid.7177.60000000084992262Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, 1098XH Amsterdam, The Netherlands
| | - Ross Brown
- grid.462187.e0000 0004 0382 657XUniversité de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM, Pau, France
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4
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Dutta Choudhury S. Multiple Effects of an Anionic Cyclodextrin Macrocycle on the Reversible Isomerization of a Photoactive Guest Dye. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:14819-14826. [PMID: 36398364 DOI: 10.1021/acs.langmuir.2c02470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Understanding and controlling the reversible isomerization of photoactive molecules in order to obtain a tunable optical response is desirable for many photofunctional applications. This study describes the interesting effects of an anionic cyclodextrin host (sulfated-βCD, SCD) on the photoisomerization and protonation equilibrium of an important hemicyanine dye (trans-4-[4-(dimethylamino)styryl]-1-methylpyridinium iodide, DSP). The SCD host assists in unlocking the photoisomerization potential of DSP by promoting protonation of the dye. It also assists in stabilizing the cis isomer of the protonated dye, thereby significantly delaying the reverse cis to trans isomerization of DSPH+. Furthermore, the interplay of both hydrophobic and electrostatic interactions in the complex formation of SCD with DSPH+ makes the reverse cis to trans isomerization of DSPH+ amenable to influence by the added salt. The stimuli-responsive reversible isomerization of SCD-DSPH+ is an interesting case from the perspective of chemical sensing or light operated functional materials with host-guest systems.
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Affiliation(s)
- Sharmistha Dutta Choudhury
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai400 085, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai400094, India
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5
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Maleckaitė K, Dodonova-Vaitkūnienė J, Žilėnaitė R, Tumkevičius S, Vyšniauskas A. Red fluorescent BODIPY molecular rotor for high microviscosity environments. Methods Appl Fluoresc 2022; 10. [PMID: 35705104 DOI: 10.1088/2050-6120/ac7943] [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: 01/25/2022] [Accepted: 06/15/2022] [Indexed: 11/11/2022]
Abstract
Microviscosity has a strong impact for diffusion-controlled processes in biological environments. BODIPY molecular rotors are viscosity-sensitive fluorophores that provide a simple and non-invasive way to visualise microviscosity. Although green fluorescent probes are already well developed for imaging, thick biological samples require longer wavelengths for investigation. This work focuses on the examination of novelβ-substitutedmeso-phenyl-BODIPYs possessing a red emission. We report a new red fluorescent BODIPY-based probe BP-Vinyl-NO2suitable for sensing microviscosity in rigid environments of over 100 000 cP viscosities. Furthermore, we demonstrate that changing the methyl position fromorthotometaon theβ-phenyl-substituted conjugate BP-PH-m2M-NO2redshifts absorbance and fluorescence spectra while maintaining viscosity sensitivity. Finally, we show that nitro-substitution ofmeso-phenyl is a versatile approach to improve the sensitivity to viscosity while suppressing sensitivity to polarity and temperature of such derivatives. In summary, we present two nitro-substituted red fluorescent probes that could be used as lifetime-based microviscosity sensors.
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Affiliation(s)
- Karolina Maleckaitė
- Center of Physical Sciences and Technology, Saulėtekio av. 3, Vilnius, LT-10257, Lithuania
| | - Jelena Dodonova-Vaitkūnienė
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, Vilnius, LT-03225, Lithuania
| | - Rugilė Žilėnaitė
- Center of Physical Sciences and Technology, Saulėtekio av. 3, Vilnius, LT-10257, Lithuania.,Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, Vilnius, LT-03225, Lithuania
| | - Sigitas Tumkevičius
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, Vilnius, LT-03225, Lithuania
| | - Aurimas Vyšniauskas
- Center of Physical Sciences and Technology, Saulėtekio av. 3, Vilnius, LT-10257, Lithuania.,Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, Vilnius, LT-03225, Lithuania
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6
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Caporaletti F, Bittermann MR, Bonn D, Woutersen S. Fluorescent molecular rotor probes nanosecond viscosity changes. J Chem Phys 2022; 156:201101. [DOI: 10.1063/5.0092248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Viscosity is a key property of liquids, but it is difficult to measure in short-lived, metastable samples due to the long measuring times required by conventional rheology. Here, we show how this problem can be solved by using fluorescent molecular rotors. The excited-state fluorescence decay rate of these molecules is sensitive to the viscosity of their local environment, and by combining pulsed laser excitation with time-resolved fluorescence detection, we can measure viscosities with a time resolution of a few ns. We demonstrate this by measuring in real time the viscosity change in glycerol induced by a nanosecond temperature jump. This new approach makes it possible to measure the viscosity of extremely short-lived states of matter.
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Affiliation(s)
- Federico Caporaletti
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, 1098XH Amsterdam, The Netherlands
- Van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, 1098XH Amsterdam, The Netherlands
| | - Marius R. Bittermann
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, 1098XH Amsterdam, The Netherlands
| | - Daniel Bonn
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, 1098XH Amsterdam, The Netherlands
| | - Sander Woutersen
- Van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, 1098XH Amsterdam, The Netherlands
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7
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Ivanov DA, Svirida AD, Petrov NK. Inclusion Complexes of Styryl Dyes with Cucurbiturils: Ultrafast Relaxation of Electronically Excited States. HIGH ENERGY CHEMISTRY 2022. [DOI: 10.1134/s0018143922030055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Mirzahossein E, Grzelka M, Pan Z, Demirkurt B, Habibi M, Brouwer AM, Bonn D. Molecular rotors to probe the local viscosity of a polymer glass. J Chem Phys 2022; 156:174901. [DOI: 10.1063/5.0087572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We investigate the local viscosity of a polymer glass around its glass transition temperature using environment-sensitive fluorescent molecular rotors embedded in the polymer matrix. The rotors' fluorescence depends on the local viscosity, and measuring the fluorescence intensity and lifetime of the probe therefore allows to measure the local free volume in the polymer glass when going through the glass transition. This also allows us to study the local viscosity and free volume when the polymer film is put under an external stress. We find that the film does not flow homogeneously, but undergoes shear banding that is visible as a spatially varying free volume and viscosity.
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Affiliation(s)
| | - Marion Grzelka
- University of Amsterdam Van der Waals-Zeeman Institute, Netherlands
| | - Zhongcheng Pan
- Institute of Physics, University of Amsterdam Van der Waals-Zeeman Institute, Netherlands
| | - Begüm Demirkurt
- University of Amsterdam Van 't Hoff Institute for Molecular Sciences, Netherlands
| | - Mehdi Habibi
- Laboratory of Physical Chemistry of Foods, Wageningen University, 6708WG Wageningen, Netherlands
| | - Albert M Brouwer
- University of Amsterdam Van 't Hoff Institute for Molecular Sciences, Netherlands
| | - Daniel Bonn
- Institute of Physics, University of Amsterdam, Netherlands
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9
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Bittermann MR, Grzelka M, Woutersen S, Brouwer AM, Bonn D. Disentangling Nano- and Macroscopic Viscosities of Aqueous Polymer Solutions Using a Fluorescent Molecular Rotor. J Phys Chem Lett 2021; 12:3182-3186. [PMID: 33759527 PMCID: PMC8041377 DOI: 10.1021/acs.jpclett.1c00512] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 03/17/2021] [Indexed: 06/12/2023]
Abstract
The macroscopic viscosity of polymer solutions in general differs strongly from the viscosity at the nanometer scale, and the relation between the two can be complicated. To investigate this relation, we use a fluorescent molecular rotor that probes the local viscosity of its molecular environment. For a range of chain lengths and concentrations, the dependence of the fluorescence on the macroscopic viscosity is well described by the classical Förster-Hoffmann (FH) equation, but the value of the FH exponent depends on the polymer chain length. We show that all data can be collapsed onto a master curve by plotting the fluorescence versus polymer concentration, which we explain in terms of the characteristic mesh size of the polymer solution. Using known scaling laws for polymers then allows us to quantitatively explain the relation between the FH exponent and the polymer chain length, allowing us to link the nano- to the macroviscosity.
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Affiliation(s)
- Marius R. Bittermann
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
- TiFN, P.O. Box 557, 6700 AN, Wageningen, The Netherlands
| | - Marion Grzelka
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
| | - Sander Woutersen
- Van
’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
| | - Albert M. Brouwer
- Van
’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
| | - Daniel Bonn
- Van
der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The
Netherlands
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10
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Suhina T, Bonn D, Weber B, Brouwer AM. Photophysics of Fluorescent Contact Sensors Based on the Dicyanodihydrofuran Motif. Chemphyschem 2021; 22:221-227. [PMID: 33210435 PMCID: PMC7898878 DOI: 10.1002/cphc.202000860] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/12/2020] [Indexed: 11/10/2022]
Abstract
Fluorescent molecular rotors have been used for measurements of local mobility on molecular length scales, for example to determine viscosity, and for the visualization of contact between two surfaces. In the present work, we deepen our insight into the excited-state deactivation kinetics and mechanics of dicyanodihydrofuran-based molecular rotors. We extend the scope of the use of this class of rotors for contact sensing with a red-shifted member of the family. This allows for contact detection with a range of excitation wavelengths up to ∼600 nm. Steady-state fluorescence shows that the fluorescence quantum yield of these rotors depends not only on the rigidity of their environment, but - under certain conditions - also on its polarity. While excited state decay via rotation about the exocyclic double bond is rapid in nonpolar solvents and twisting of a single bond allows for fast decay in polar solvents, the barriers for both processes are significant in solvents of intermediate polarity. This effect may also occur in other molecular rotors, and it should be considered when applying such molecules as local mobility probes.
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Affiliation(s)
- Tomislav Suhina
- van ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
- Institute of PhysicsUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| | - Daniel Bonn
- Institute of PhysicsUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| | - Bart Weber
- Institute of PhysicsUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| | - Albert M. Brouwer
- van ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
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11
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Paudics A, Hessz D, Bojtár M, Gyarmati B, Szilágyi A, Kállay M, Bitter I, Kubinyi M. Binding Modes of a Phenylpyridinium Styryl Fluorescent Dye with Cucurbiturils. Molecules 2020; 25:E5111. [PMID: 33153219 PMCID: PMC7663148 DOI: 10.3390/molecules25215111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/27/2020] [Accepted: 10/29/2020] [Indexed: 11/16/2022] Open
Abstract
In order to explore how cucurbituril hosts accommodate an N-phenyl-pyridinium derivative guest, the complexation of the solvatochromic dye, 4-(4-(dimethylamino)styryl)-1-phenylpyridinium iodide (PhSt) with ,',δ,δ'-tetramethyl-cucurbit[6]uril (Me4CB6) and cucurbit[7]uril (CB7) was investigated by absorption spectroscopic, fluorescence and NMR experiments. In aqueous solutions, PhSt forms 1:1 complexes with both cucurbiturils, the complex with CB7 has a higher stability constant (Ka = 6.0 × 106 M-1) than the complex with Me4CB6 (Ka = 1.1 × 106 M-1). As revealed by NMR experiments and confirmed by theoretical calculations, CB7 encapsulates the whole phenylpyridinium entity of the PhSt cation guest, whereas the cavity of Me4CB6 includes only the phenyl ring, the pyridinium ring is bound to the carbonyl rim of the host. The binding of PhSt to cucurbiturils is accompanied by a strong enhancement of the fluorescence quantum yield due to the blocking of the deactivation through a twisted intramolecular charge transfer (TICT) state. The TICT mechanism in PhSt was characterized by fluorescence experiments in polyethylene glycol (PEG) solvents of different viscosities. The PhSt-CB7 system was tested as a fluorescence indicator displacement (FID) assay, and it recognized trimethyl-lysine selectively over other lysine derivatives.
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Affiliation(s)
- Adrien Paudics
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, 1521 Budapest, Hungary; (A.P.); (D.H.); (B.G.); (A.S.); (M.K.)
| | - Dóra Hessz
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, 1521 Budapest, Hungary; (A.P.); (D.H.); (B.G.); (A.S.); (M.K.)
| | - Márton Bojtár
- “Lendület” Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, 1519 Budapest, Hungary;
| | - Benjámin Gyarmati
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, 1521 Budapest, Hungary; (A.P.); (D.H.); (B.G.); (A.S.); (M.K.)
| | - András Szilágyi
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, 1521 Budapest, Hungary; (A.P.); (D.H.); (B.G.); (A.S.); (M.K.)
| | - Mihály Kállay
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, 1521 Budapest, Hungary; (A.P.); (D.H.); (B.G.); (A.S.); (M.K.)
| | - István Bitter
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary;
| | - Miklós Kubinyi
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, 1521 Budapest, Hungary; (A.P.); (D.H.); (B.G.); (A.S.); (M.K.)
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12
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Atig D, Broseta D, Pereira JM, Brown R. Contactless probing of polycrystalline methane hydrate at pore scale suggests weaker tensile properties than thought. Nat Commun 2020; 11:3379. [PMID: 32632157 PMCID: PMC7338411 DOI: 10.1038/s41467-020-16628-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 05/07/2020] [Indexed: 11/25/2022] Open
Abstract
Methane hydrate is widely distributed in the pores of marine sediments or permafrost soils, contributing to their mechanical properties. Yet the tensile properties of the hydrate at pore scales remain almost completely unknown, notably the influence of grain size on its own cohesion. Here we grow thin films of the hydrate in glass capillaries. Using a novel, contactless thermal method to apply stress, and video microscopy to observe the strain, we estimate the tensile elastic modulus and strength. Ductile and brittle characteristics are both found, dependent on sample thickness and texture, which are controlled by supercooling with respect to the dissociation temperature and by ageing. Relating the data to the literature suggests the cohesive strength of methane hydrate was so far significantly overestimated. The authors here report tensile properties of polycrystalline methane hydrate at the micron scale by applying a contactless, thermos-induced stress to a tenuous shell of hydrate grown in a thin glass capillary. The results suggest that the cohesive strength of methane hydrate in marine settings may be an order of magnitude less than currently thought.
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Affiliation(s)
- Dyhia Atig
- CNRS/ TOTAL/ UNIV PAU & PAYS ADOUR E2S UPPA, Laboratoire des fluides complexes et de leurs réservoirs, UMR5150, 64000, Pau, France
| | - Daniel Broseta
- CNRS/ TOTAL/ UNIV PAU & PAYS ADOUR E2S UPPA, Laboratoire des fluides complexes et de leurs réservoirs, UMR5150, 64000, Pau, France
| | | | - Ross Brown
- CNRS/ TOTAL/ UNIV PAU & PAYS ADOUR E2S UPPA, Institut des sciences analytiques et de physico-chimie pour l'environnement et les matériaux, UMR5254, 64000, Pau, France.
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13
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Petrov NK, Ivanov DA, Alfimov MV. Ultrafast Dynamics of Electronically Excited Host-Guest Complexes of Cucurbiturils with Styryl Dyes. ACS OMEGA 2019; 4:11500-11507. [PMID: 31460255 PMCID: PMC6681982 DOI: 10.1021/acsomega.9b01158] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 06/19/2019] [Indexed: 06/10/2023]
Abstract
The relaxation mechanism of electronically excited states of host-guest complexes between cucurbiturils (CB) and pyridinium styryl dyes is considered in detail on the basis of the recent results obtained by the up-conversion fluorescence technique. The addition of CB to aqueous dye solutions increases the longest fluorescence decay times from about 50 ps for the free dyes to 100-150 ps for the bound ones. This is attributed to the braking of intramolecular rotations around the single bonds of the styryl moiety that is provided by guest's displacement inside the cavity, whose driving force is a Coulombic interaction of the styryl dye cation and negatively charged CB portals. This displacement, a translational movement along the CB axis, is associated with the observed decay time of about 1 ps. There is also a characteristic time of about 100 fs, attributed to vibrational relaxation. In fact, such complexes can operate as a molecular machine, the molecular switch.
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Affiliation(s)
- Nikolai Kh Petrov
- Photochemistry Center RAS, FSRC "Crystallography and Photonics" RAS, ul. Novatorov 7A, 119421 Moscow, Russia
- Moscow Institute of Physics and Technology (State University), Institutsky per. 9, 141707 Dolgoprudny, Russia
| | - Denis A Ivanov
- Photochemistry Center RAS, FSRC "Crystallography and Photonics" RAS, ul. Novatorov 7A, 119421 Moscow, Russia
| | - Michael V Alfimov
- Photochemistry Center RAS, FSRC "Crystallography and Photonics" RAS, ul. Novatorov 7A, 119421 Moscow, Russia
- Moscow Institute of Physics and Technology (State University), Institutsky per. 9, 141707 Dolgoprudny, Russia
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14
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Qian Y, Deng GH, Lapp J, Rao Y. Interfaces of Gas-Aerosol Particles: Relative Humidity and Salt Concentration Effects. J Phys Chem A 2019; 123:6304-6312. [PMID: 31253043 DOI: 10.1021/acs.jpca.9b03896] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The growth of aerosol particles is intimately related to chemical reactions in the gas phase and particle phase and at gas-aerosol particle interfaces. While chemical reactions in gas and particle phases are well documented, there is very little information regarding interface-related reactions. The interface of gas-aerosol particles not only facilitates a physical channel for organic species to enter and exit but also provides a necessary lane for culturing chemical reactions. The physical and chemical properties of gas-particle interfaces have not been studied extensively, nor have the reactions occurring at the interfaces been well researched. This is mainly due to the fact that there is a lack of suitable in situ interface-sensitive analytical techniques for direct measurements of interfacial properties. The motivation behind this research is to understand how interfaces play a role in the growth of aerosol particles. We have developed in situ interface-specific second harmonic scattering to examine interfacial behaviors of molecules of aerosol particles under different relative humidity (RH) and salt concentrations. Both the relative humidity and salt concentration can change the particle size and the phase of the aerosol. RH not only varies the concentration of solutes inside aerosol particles but also changes interfacial hydration in local regions. Organic molecules were found to exhibit distinct behaviors at the interfaces and bulk on NaCl particles under different RH levels. Our quantitative analyses showed that the interfacial adsorption free energies remain unchanged while interfacial areas increase as the relative humidity increases. Furthermore, the surface tension of NaCl particles decreases as the RH increases. Our experimental findings from the novel nonlinear optical scattering technique stress the importance of interfacial water behaviors on aerosol particles in the atmosphere.
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Affiliation(s)
- Yuqin Qian
- Department of Chemistry and Biochemistry , Utah State University , Logan , Utah 84322 , United States
| | - Gang-Hua Deng
- Department of Chemistry and Biochemistry , Utah State University , Logan , Utah 84322 , United States
| | - Jordan Lapp
- Department of Chemistry and Biochemistry , Utah State University , Logan , Utah 84322 , United States
| | - Yi Rao
- Department of Chemistry and Biochemistry , Utah State University , Logan , Utah 84322 , United States
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15
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Weber B, Suhina T, Junge T, Pastewka L, Brouwer AM, Bonn D. Molecular probes reveal deviations from Amontons' law in multi-asperity frictional contacts. Nat Commun 2018; 9:888. [PMID: 29497030 PMCID: PMC5832787 DOI: 10.1038/s41467-018-02981-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 01/11/2018] [Indexed: 11/20/2022] Open
Abstract
Amontons’ law defines the friction coefficient as the ratio between friction force and normal force, and assumes that both these forces depend linearly on the real contact area between the two sliding surfaces. However, experimental testing of frictional contact models has proven difficult, because few in situ experiments are able to resolve this real contact area. Here, we present a contact detection method with molecular-level sensitivity. We find that while the friction force is proportional to the real contact area, the real contact area does not increase linearly with normal force. Contact simulations show that this is due to both elastic interactions between asperities on the surface and contact plasticity of the asperities. We reproduce the contact area and fine details of the measured contact geometry by including plastic hardening into the simulations. These new insights will pave the way for a quantitative microscopic understanding of contact mechanics and tribology. Amontons’ law assumes that friction and normal forces depend linearly on the contact area. Here, the authors use a new contact detection method to show that the law is broken because asperities interact and deform in the contact area to change it, thereby also changing the friction force.
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Affiliation(s)
- B Weber
- Van der Waals-Zeeman Institute, IoP, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, Netherlands.,Advanced Research Center for Nanolithography (ARCNL), Science Park 110, 1098 XG, Amsterdam, Netherlands
| | - T Suhina
- Van der Waals-Zeeman Institute, IoP, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, Netherlands.,Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, Netherlands
| | - T Junge
- Institute for Applied Materials, Karlsruhe Institute of Technology, Engelbert-Arnold-Strasse 4, 76131, Karlsruhe, Germany
| | - L Pastewka
- Institute for Applied Materials, Karlsruhe Institute of Technology, Engelbert-Arnold-Strasse 4, 76131, Karlsruhe, Germany.,MicroTribology Center, Fraunhofer IWM, Wöhlerstraße 11, 79108, Freiburg, Germany.,Department of Microsystems Engineering, University of Freiburg, Georges-Köhler-Allee 103, 79110, Freiburg, Germany
| | - A M Brouwer
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, Netherlands
| | - D Bonn
- Van der Waals-Zeeman Institute, IoP, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, Netherlands.
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Lee SC, Lee CL, Heo J, Jeong CU, Lee GH, Kim S, Yoon W, Yun H, Park SO, Kwak SK, Park SH, Kwon OP. Molecular Viscosity Sensors with Two Rotators for Optimizing the Fluorescence Intensity-Contrast Trade-Off. Chemistry 2017; 24:2888-2897. [DOI: 10.1002/chem.201704036] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Seung-Chul Lee
- Department of Molecular Science and Technology; Ajou University; Suwon 443-749 Republic of Korea
| | - Chang-Lyoul Lee
- Advanced Photonics Research Institute (APRI); Gwangju Institute of Science and Technology (GIST); 123 Cheomdangwagi-ro, Buk-gu Gwangju 61005 Republic of Korea
| | - Jeongyun Heo
- Center for Theragnosis; Korea Institute of Science and Technology (KIST); 39-1 Hawolgok-dong, Seongbuk-gu Seoul 136-791 Republic of Korea
| | - Chan-Uk Jeong
- Department of Molecular Science and Technology; Ajou University; Suwon 443-749 Republic of Korea
| | - Gyeong-Hui Lee
- Department of Molecular Science and Technology; Ajou University; Suwon 443-749 Republic of Korea
| | - Sehoon Kim
- Center for Theragnosis; Korea Institute of Science and Technology (KIST); 39-1 Hawolgok-dong, Seongbuk-gu Seoul 136-791 Republic of Korea
| | - Woojin Yoon
- Department of Chemistry & Department of Energy Systems Research; Ajou University; Suwon 443-749 Republic of Korea
| | - Hoseop Yun
- Department of Chemistry & Department of Energy Systems Research; Ajou University; Suwon 443-749 Republic of Korea
| | - Sung O. Park
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology; 50 UNIST-gil Ulsan 44919 Republic of Korea
| | - Sang Kyu Kwak
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology; 50 UNIST-gil Ulsan 44919 Republic of Korea
| | - Sung-Ha Park
- Department of Applied Chemistry and Biological Engineering; Ajou University; Suwon 443-749 Republic of Korea
| | - O-Pil Kwon
- Department of Molecular Science and Technology; Ajou University; Suwon 443-749 Republic of Korea
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17
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Alhassawi FM, Corradini MG, Rogers MA, Ludescher RD. Potential applications of luminescent molecular rotors in food science and engineering. Crit Rev Food Sci Nutr 2017; 58:1902-1916. [DOI: 10.1080/10408398.2017.1278583] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Fatemah M. Alhassawi
- Department of Food Science, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Maria G. Corradini
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA, USA
| | - Michael A. Rogers
- Department of Food Science, University of Guelph, Guelph, Ontario, Canada
| | - Richard D. Ludescher
- Department of Food Science, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
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Wang BQ, Yin XF, Dong YY, Zhang CY. Theoretical study of the ground and excited states of 1-methylamideanthraquinone and its complex with fluoride anion. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2016. [DOI: 10.1142/s0219633616500334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We have performed a series of calculations using density functional theory (DFT) and time-dependent density functional theory (TD-DFT) for 1-methylamideanthraquinone (MAAQ). In the S0 state of MAAQ, amide group is coplanar with anthraquinone, and an intramolecular hydrogen bond [Formula: see text] is formed. The [Formula: see text] transition has an intramolecular charge transfer character. Two stable structures (planar nMAAQ and twisted tMAAQ) have been obtained in the S1 state of MAAQ. Thereinto, nMAAQ is lower by 0.105[Formula: see text]eV than tMAAQ in energy, so nMAAQ is the dominant conformation in the S1 state of MAAQ and the emission spectra of tMAAQ cannot be observed in the solution of MAAQ. Excited state intramolecular proton transfer (ESIPT) between C[Formula: see text]O and N–H was not observed in the S1 state of MAAQ. Upon addition of fluoride anion, only twisted conformations were obtained in both S0 and S1 states of MAAQ-F[Formula: see text]. An intermolecular hydrogen bond [Formula: see text] is formed in the S0 state, and intermolecular proton transfer happens in the S1 state for MAAQ-F[Formula: see text].
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Affiliation(s)
- Bing-Qiang Wang
- Department of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, P. R. China
| | - Xiao-Fen Yin
- Department of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, P. R. China
| | - Yan-Yun Dong
- Department of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, P. R. China
| | - Cai-Yun Zhang
- Department of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, P. R. China
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Lee SC, Heo J, Ryu JW, Lee CL, Kim S, Tae JS, Rhee BO, Kim SW, Kwon OP. Pyrrolic molecular rotors acting as viscosity sensors with high fluorescence contrast. Chem Commun (Camb) 2016; 52:13695-13698. [DOI: 10.1039/c6cc06521j] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Pyrrolic viscosity sensors exhibit one order of magnitude higher fluorescence contrast compared to that of the conventional phenolic analogues due to the viscosity-sensitive rotation of the rotational pyrrole group.
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Affiliation(s)
- Seung-Chul Lee
- Department of Molecular Science and Technology
- Ajou University
- Suwon 443-749
- Korea
| | - Jeongyun Heo
- Center for Theragnosis
- Korea Institute of Science and Technology (KIST)
- Seongbuk-gu
- Korea
| | - Jong-Wan Ryu
- Department of Molecular Science and Technology
- Ajou University
- Suwon 443-749
- Korea
| | - Chang-Lyoul Lee
- Advanced Photonics Research Institute (APRI)
- Gwangju Institute of Science and Technology (GIST)
- Buk-gu
- Korea
| | - Sehoon Kim
- Center for Theragnosis
- Korea Institute of Science and Technology (KIST)
- Seongbuk-gu
- Korea
| | - Joon-Sung Tae
- Department of Mechanical Engineering
- Ajou University
- Suwon
- Korea
| | - Byung-Ohk Rhee
- Department of Mechanical Engineering
- Ajou University
- Suwon
- Korea
| | - Sang-Wook Kim
- Department of Molecular Science and Technology
- Ajou University
- Suwon 443-749
- Korea
| | - O-Pil Kwon
- Department of Molecular Science and Technology
- Ajou University
- Suwon 443-749
- Korea
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Lee Y, Kim YL, Kim MH, Lee M. Influence of matrix rigidity on the internal twisting of electronically excited thioflavin T in polymer nanostructures. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Cao J, Hu C, Liu F, Sun W, Fan J, Song F, Sun S, Peng X. Mechanism and Nature of the Different Viscosity Sensitivities of Hemicyanine Dyes with Various Heterocycles. Chemphyschem 2013; 14:1601-8. [DOI: 10.1002/cphc.201300049] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Indexed: 01/02/2023]
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Jee AY, Lee Y, Lee M, Kim MH. Communication: Time-resolved fluorescence of highly single crystalline molecular wires of azobenzene. J Chem Phys 2012; 136:121104. [DOI: 10.1063/1.3701733] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Jee AY, Lee M. Elasticity-controlled molecular dynamics of 9,9′-bifluorenyldene as a function of temperature and force. NEW J CHEM 2012. [DOI: 10.1039/c2nj40092h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Jee AY, Park S, Lee M. Light-induced isomerization dynamics of a cyanine dye in the modulus-controlled regime. Phys Chem Chem Phys 2011; 13:15227-32. [PMID: 21769327 DOI: 10.1039/c1cp20835g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trans-cis isomerization of an excited molecule converts light energy into mechanical motion, which interacts cooperatively with its surroundings. To understand such a photodynamic process in solids, we investigated the internal twisting motion of 1,1'-diethyl-2,2'-cyanine iodide (DCI) in a series of poly(alkyl methacrylate) (PAMA) polymers by measuring the Young's moduli of the polymers with atomic force microscopy nanoindentation and the fluorescence lifetimes of the dye with time-correlated single photon counting. We found that the isomerization rate constant obtained from the average lifetime correlated well with the mechanical property of the matrix. Our results show that the light-induced molecular motion lies in the modulus-controlled regime in which the polymer matrix not only provides a rigid environment for the dynamics of the molecules but also participates actively in the motion. The concept of elastic modulus may be applicable to molecular rotor dynamics in any synthetic polymer and, in principle, can be extended to biopolymers such as proteins or DNA.
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Affiliation(s)
- Ah-Young Jee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, Republic of Korea
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Gangamallaiah V, Dutt GB. Characterizing interfacial friction in bis(2-ethylhexyl) sodium sulfosuccinate reverse micelles from photoisomerization studies of carbocyanine derivatives. J Chem Phys 2011; 134:024706. [DOI: 10.1063/1.3529013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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