1
|
Su W, Xu C, Hu J, Chen Q, Yang Y, Ji M, Fei Y, Ma J, Jiang H, Mi L. Non-invasive screening of bladder cancer using digital microfluidics and FLIM technology combined with deep learning. JOURNAL OF BIOPHOTONICS 2024:e202400192. [PMID: 38938144 DOI: 10.1002/jbio.202400192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 05/23/2024] [Accepted: 05/27/2024] [Indexed: 06/29/2024]
Abstract
Non-invasive screening for bladder cancer is crucial for treatment and postoperative follow-up. This study combines digital microfluidics (DMF) technology with fluorescence lifetime imaging microscopy (FLIM) for urine analysis and introduces a novel non-invasive bladder cancer screening technique. Initially, the DMF was utilized to perform preliminary screening and enrichment of urine exfoliated cells from 54 participants, followed by cell staining and FLIM analysis to assess the viscosity of the intracellular microenvironment. Subsequently, a deep learning residual convolutional neural network was employed to automatically classify FLIM images, achieving a three-class prediction of high-risk (malignant), low-risk (benign), and minimal risk (normal) categories. The results demonstrated a high consistency with pathological diagnosis, with an accuracy of 91% and a precision of 93%. Notably, the method is sensitive for both high-grade and low-grade bladder cancer cases. This highly accurate non-invasive screening method presents a promising approach for bladder cancer screening with significant clinical application potential.
Collapse
Affiliation(s)
- Wenhua Su
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), School of Information Science and Technology, Fudan University, Shanghai, China
| | - Chenyang Xu
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, China
| | - Jinzhong Hu
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, China
| | - Qiushu Chen
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), School of Information Science and Technology, Fudan University, Shanghai, China
| | - Yuwei Yang
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), School of Information Science and Technology, Fudan University, Shanghai, China
| | - Mingmei Ji
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), School of Information Science and Technology, Fudan University, Shanghai, China
| | - Yiyan Fei
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), School of Information Science and Technology, Fudan University, Shanghai, China
| | - Jiong Ma
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), School of Information Science and Technology, Fudan University, Shanghai, China
- Institute of Biomedical Engineering and Technology, Academy for Engineer and Technology, Fudan University, Shanghai, China
- Shanghai Engineering Research Center of Industrial Microorganisms, The Multiscale Research Institute of Complex Systems (MRICS), School of Life Sciences, Fudan University, Shanghai, China
| | - Haowen Jiang
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, China
| | - Lan Mi
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), School of Information Science and Technology, Fudan University, Shanghai, China
- Institute of Biomedical Engineering and Technology, Academy for Engineer and Technology, Fudan University, Shanghai, China
| |
Collapse
|
2
|
Vieira Nunes Cunha I, Machado Campos A, Passarella Gerola A, Caon T. Effect of invasome composition on membrane fluidity, vesicle stability and skin interactions. Int J Pharm 2023; 646:123472. [PMID: 37788728 DOI: 10.1016/j.ijpharm.2023.123472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 09/11/2023] [Accepted: 09/30/2023] [Indexed: 10/05/2023]
Abstract
Invasomes have been widely exploited to enhance the percutaneous permeation of drugs. On the other hand, few studies have been dedicated to evaluating how their composition impacts the interaction with the skin, vesicle rigidity and stability, which was the focus of this investigation. Light scattering and spectroscopic techniques were considered for vesicle characterization. The addition of cholesterol (CHOL) into the phosphatidylcholine (PC) vesicles led to increased membrane rigidity (from PC:CHOL 5:0.5) and a concentration-dependent disorder effect on skin domains. Nevertheless, these vesicles were showed to be less stable. Ethanol, in turn, resulted in larger and more flexible vesicles, which can be attributed to its preferential distribution in headgroups of PC. The effect of limonene on membrane rigidity was dependent on the vesicle composition. It reduced the rigidity when few constituents were considered, but an opposite effect was observed for vesicles containing PC, CHOL, ethanol and limonene. Competitive effects of limonene and CHOL by the same domains in PC could explain these findings. Limonene was crucial to obtaining more monodisperse vesicles and it showed a synergistic action with CHOL in the disruption of lipid domains in the skin. Invasomes were more stable than liposomes. CHOL-free invasomes showed to be stable for up to 40 days at room temperature.
Collapse
Affiliation(s)
- Izi Vieira Nunes Cunha
- Department of Pharmaceutical Sciences, Federal University of Santa Catarina, Florianópolis 88040-900, SC, Brazil
| | - Angela Machado Campos
- Department of Pharmaceutical Sciences, Federal University of Santa Catarina, Florianópolis 88040-900, SC, Brazil
| | | | - Thiago Caon
- Department of Pharmaceutical Sciences, Federal University of Santa Catarina, Florianópolis 88040-900, SC, Brazil.
| |
Collapse
|
3
|
Schmitt S, Renzer G, Benrath J, Best A, Jiang S, Landfester K, Butt HJ, Simonutti R, Crespy D, Koynov K. Monitoring the Formation of Polymer Nanoparticles with Fluorescent Molecular Rotors. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sascha Schmitt
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Galit Renzer
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Jennifer Benrath
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Andreas Best
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Shuai Jiang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Roberto Simonutti
- Department of Material Science, University Milano Bicocca, Via R Cozzi 55, I-20125 Milan, Italy
| | | | - Kaloian Koynov
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| |
Collapse
|
4
|
Carayon C, Ghodbane A, Leygue N, Wang J, Saffon‐Merceron N, Brown R, Fery‐Forgues S. Mechanofluorochromic Properties of an AIEE‐Active 2‐Phenylbenzoxazole Derivative: More than Meets the Eye? CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201800261] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Chantal Carayon
- SPCMIB, UMR 5068CNRS-Université de Toulouse III Paul Sabatier 118 route de Narbonne Toulouse 31062 France
| | - Abdelhamid Ghodbane
- SPCMIB, UMR 5068CNRS-Université de Toulouse III Paul Sabatier 118 route de Narbonne Toulouse 31062 France
| | - Nadine Leygue
- SPCMIB, UMR 5068CNRS-Université de Toulouse III Paul Sabatier 118 route de Narbonne Toulouse 31062 France
| | - Jinhui Wang
- SPCMIB, UMR 5068CNRS-Université de Toulouse III Paul Sabatier 118 route de Narbonne Toulouse 31062 France
- Institute of Drug Discovery TechnologyNingbo University Ningbo 315211 China
| | - Nathalie Saffon‐Merceron
- Service commun RX, Institut de Chimie de Toulouse ICT- FR2599Université de Toulouse III Paul Sabatier 31062 Toulouse cedex 9 France
| | - Ross Brown
- CNRS/Univ Pau & Pays Adour/E2S UPPAInstitut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, UMR 5254 64000 Pau France
| | - Suzanne Fery‐Forgues
- SPCMIB, UMR 5068CNRS-Université de Toulouse III Paul Sabatier 118 route de Narbonne Toulouse 31062 France
| |
Collapse
|
5
|
Saito Y, Higuchi M, Yoshioka S, Senboku H, Inokuma Y. Bioinspired synthesis of pentalene-based chromophores from an oligoketone chain. Chem Commun (Camb) 2018; 54:6788-6791. [DOI: 10.1039/c8cc02379d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Inspired by natural polyketide synthesis, pentalene-based, cross-conjugated chromophores were synthesized from an aliphatic oligoketone chain.
Collapse
Affiliation(s)
- Yuki Saito
- Division of Applied Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Masayuki Higuchi
- Division of Applied Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Shota Yoshioka
- Division of Applied Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Hisanori Senboku
- Division of Applied Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Yasuhide Inokuma
- Division of Applied Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| |
Collapse
|
6
|
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
| |
Collapse
|
7
|
Suhina T, Amirjalayer S, Mennucci B, Woutersen S, Hilbers M, Bonn D, Brouwer AM. Excited-State Decay Pathways of Molecular Rotors: Twisted Intermediate or Conical Intersection? J Phys Chem Lett 2016; 7:4285-4290. [PMID: 27736089 DOI: 10.1021/acs.jpclett.6b02277] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The fluorescence intensity of molecular rotors containing the dicyanomethylenedihydrofuran (DCDHF) motif increases strongly with solvent viscosity. Single-bond and double-bond rotations have been proposed as pathways of nonradiative decay for this and related molecular rotors. We show here that both are involved in the case of DCDHF rotors: Fluorescence is quenched by rotation around the dicyanomethylene double bond in nonpolar solvents, but in a sufficiently polar environment rotation about a formally single bond leads to a dark internal charge-transfer state.
Collapse
Affiliation(s)
- Tomislav Suhina
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam , P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
- van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam , P.O. Box 94485, 1090 GL Amsterdam, The Netherlands
| | - Saeed Amirjalayer
- Center for Nanotechnology (CeNTech) and Physical Institute, University of Münster , Heisenbergstrasse 11, 48149 Münster, Germany
| | - Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale, University of Pisa , via G. Moruzzi 13, 56124 Pisa, Italy
| | - Sander Woutersen
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam , P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Michiel Hilbers
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam , P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Daniel Bonn
- van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam , P.O. Box 94485, 1090 GL Amsterdam, The Netherlands
| | - Albert M Brouwer
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam , P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
| |
Collapse
|
8
|
Affiliation(s)
- Pierpaolo Minei
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; Via Moruzzi 13 56124 Pisa Italy
| | - Andrea Pucci
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; Via Moruzzi 13 56124 Pisa Italy
- CNR-Istituto per i Processi Chimico Fisici; UOS Pisa, Via Moruzzi 1 56124 Pisa Italy
| |
Collapse
|
9
|
|
10
|
Yang S, Han K. Effects of Solvent Dielectric Constant and Viscosity on Two Rotational Relaxation Paths of Excited 9-(Dicyanovinyl) Julolidine. J Phys Chem A 2016; 120:4961-5. [DOI: 10.1021/acs.jpca.5b12612] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Songqiu Yang
- State Key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Keli Han
- State Key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| |
Collapse
|
11
|
Breffke J, Williams BW, Maroncelli M. The Photophysics of Three Naphthylmethylene Malononitriles. J Phys Chem B 2014; 119:9254-67. [DOI: 10.1021/jp509882q] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jens Breffke
- Department
of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Brian W. Williams
- Department
of Chemistry, Bucknell University, Lewisburg, Pennsylvania 17837, United States
| | - Mark Maroncelli
- Department
of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| |
Collapse
|
12
|
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]
|
13
|
|
14
|
Gavvala K, Sasikala WD, Sengupta A, Dalvi SA, Mukherjee A, Hazra P. Modulation of excimer formation of 9-(dicyano-vinyl)julolidine by the macrocyclic hosts. Phys Chem Chem Phys 2013; 15:330-40. [DOI: 10.1039/c2cp43282j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
15
|
Rumble C, Rich K, He G, Maroncelli M. CCVJ Is Not a Simple Rotor Probe. J Phys Chem A 2012; 116:10786-92. [DOI: 10.1021/jp309019g] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Christopher Rumble
- Department of Chemistry, The Pennsylvania State University, University
Park,
Pennsylvania 16802, United States
| | - Kacie Rich
- Department of Chemistry, The Pennsylvania State University, University
Park,
Pennsylvania 16802, United States
| | - Gang He
- Department of Chemistry, The Pennsylvania State University, University
Park,
Pennsylvania 16802, United States
| | - Mark Maroncelli
- Department of Chemistry, The Pennsylvania State University, University
Park,
Pennsylvania 16802, United States
| |
Collapse
|
16
|
Lee H, Lee M. Excluded volume effect in the fluorescence energy transfer of single donor-multiple acceptors in polymer. J Phys Chem B 2012; 116:11857-62. [PMID: 22967214 DOI: 10.1021/jp306164a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Fluorescence resonance energy transfer (FRET) from a donor to multiple acceptors is an interesting subject. Numerous studies using theoretical models and simulations have focused on the excluded volume effect, which was not considered in Förster's first derivation. In this work, we first present the experimental results on the excluded volume effect by employing time-resolved FRET. Coumarin 334 (C334) was used as the energy donor whereas hemin and cytochrome c (cyt c) were used as the energy acceptors. The fluorescence intensity decays were measured for C334 surrounded by a number of acceptors in poly(acrylic acid). We have observed that the excluded volume effect is markedly pronounced with cyt c compared with hemin when the acceptor concentration is high (>5 mM). The results, which may be explicitly described by the relative molecular sizes of two acceptors, showed that the excluded volume effect should be considered in the interpretation of FRET data, especially when bulk chromophores are used.
Collapse
Affiliation(s)
- Hyemin Lee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, Republic of Korea
| | | |
Collapse
|
17
|
Zhang W, Lan Z, Sun Z, Gaffney KJ. Resolving Photo-Induced Twisted Intramolecular Charge Transfer with Vibrational Anisotropy and TDDFT. J Phys Chem B 2012; 116:11527-36. [DOI: 10.1021/jp306455m] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Wenkai Zhang
- PULSE Institute, SLAC National
Accelerator Laboratory, Stanford University, Menlo Park, California, 94025, United States
| | - Zhenggang Lan
- Qingdao Institute of Bioenergy
and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, Shandong, China
| | - Zheng Sun
- PULSE Institute, SLAC National
Accelerator Laboratory, Stanford University, Menlo Park, California, 94025, United States
| | - Kelly J. Gaffney
- PULSE Institute, SLAC National
Accelerator Laboratory, Stanford University, Menlo Park, California, 94025, United States
| |
Collapse
|
18
|
Lan Z, Lu Y, Weingart O, Thiel W. Nonadiabatic Decay Dynamics of a Benzylidene Malononitrile. J Phys Chem A 2012; 116:1510-8. [DOI: 10.1021/jp2117888] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zhenggang Lan
- Qingdao Institute
of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101 Shandong,
China
| | - You Lu
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1,
D-45470, Mülheim an der Ruhr, Germany
| | - Oliver Weingart
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1,
D-45470, Mülheim an der Ruhr, Germany
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1,
D-45470, Mülheim an der Ruhr, Germany
| |
Collapse
|
19
|
Jee AY, Lee MY. Dynamics of Photo-excited 9-dicanovinyljulolidine in Poly(ethylene glycol)-poly(acrylic acid) Blends. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.11.3847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
20
|
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.
Collapse
Affiliation(s)
- Ah-Young Jee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, Republic of Korea
| | | | | |
Collapse
|
21
|
Levitt JA, Chung PH, Kuimova MK, Yahioglu G, Wang Y, Qu J, Suhling K. Fluorescence anisotropy of molecular rotors. Chemphyschem 2011; 12:662-72. [PMID: 21328515 DOI: 10.1002/cphc.201000782] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 01/10/2011] [Indexed: 12/12/2022]
Abstract
We present polarization-resolved fluorescence measurements of fluorescent molecular rotors 9-(2-carboxy-2-cyanovinyl)julolidine (CCVJ), 9-(2,2-dicyanovinyl)julolidine (DCVJ), and a meso-substituted boron dipyrromethene (BODIPY-C(12)). The photophysical properties of these molecules are highly dependent on the viscosity of the surrounding solvent. The relationship between their quantum yields and the viscosity of the surrounding medium is given by an equation first described and presented by Förster and Hoffmann and can be used to determine the microviscosity of the environment around a fluorophore. Herein we evaluate the applicability of molecular rotors as probes of apparent viscosity on a microscopic scale based on their viscosity dependent fluorescence depolarization. We develop a theoretical framework, combining the Förster-Hoffmann equation with the Perrin equation and compare the dynamic ranges and usable working regimes for these dyes in terms of utilising fluorescence anisotropy as a measure of viscosity. We present polarization-resolved fluorescence spectra and steady-state fluorescence anisotropy imaging data for measurements of intracellular viscosity. We find that the dynamic range for fluorescence anisotropy for CCVJ and DCVJ is significantly lower than that of BODIPY-C(12) in the viscosity range 0.6<η<600 cP. Moreover, using steady-state anisotropy measurements to probe microviscosity in the low (<3 cP) viscosity regime, the molecular rotors can offer a better dynamic range in anisotropy compared with a rigid dye as a probe of microviscosity, and a higher total working dynamic range in terms of viscosity.
Collapse
Affiliation(s)
- James A Levitt
- Department of Physics, King's College London, Strand, London, WC2R 2LS, UK
| | | | | | | | | | | | | |
Collapse
|
22
|
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
|
23
|
Jee AY, Bae E, Lee M. Internal motion of an electronically excited molecule in viscoelastic media. J Chem Phys 2010; 133:014507. [PMID: 20614976 DOI: 10.1063/1.3454724] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The twisting motion of trans-4-[4-(dimethylamino)-styryl]-1-methylpyridinium iodide (4-DASPI) in the excited state was investigated in solutions and various polymers in order to understand dependence of molecular rotor dynamics on viscoelasticity. It was observed that the internal motion of electronically excited 4-DASPI correlates strongly with dynamic viscosity and elastic modulus. Our results also showed that condensed phase dynamics of 4-DASPI are governed by the explicit mode coupling between the rotamerizing coordinate and mechanical properties of viscoelastic media.
Collapse
Affiliation(s)
- Ah-Young Jee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, Republic of Korea
| | | | | |
Collapse
|
24
|
Jin H, Liang M, Arzhantsev S, Li X, Maroncelli M. Photophysical Characterization of Benzylidene Malononitriles as Probes of Solvent Friction. J Phys Chem B 2010; 114:7565-78. [DOI: 10.1021/jp100908a] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hui Jin
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Min Liang
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Sergei Arzhantsev
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Xiang Li
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Mark Maroncelli
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| |
Collapse
|