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Adhikari S, Essandoh MA, Starr WC, Sah P, La Force CN, Eleshy RG, Lutter EI, Nelson TL. Eumelanin-Inspired Antimicrobial with Biocidal Activity against Methicillin-Resistant Staphylococcus aureus. ACS APPLIED BIO MATERIALS 2022; 5:545-551. [PMID: 35113537 DOI: 10.1021/acsabm.1c01036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reliance on antibiotics and antimicrobials to treat bacterial infectious diseases is threatened by the emergence of antibiotic resistance and multi-drug-resistant organisms, thus having the potential to greatly impact human health. Thus, the discovery and development of antimicrobials capable of acting on antibiotic-resistant bacteria is a major area of significance in scientific research. Herein, we present the development of a eumelanin-inspired antimicrobial capable of killing methicillin-resistant Staphylococcus aureus (MRSA). By ligating quaternary ammonium-functionalized "arms" to a eumelanin-inspired indole with intrinsic antimicrobial activity, an antimicrobial agent with enhanced activity was prepared. This resulting antimicrobial, EIPE-1, had a minimum inhibitory concentration of 16 μg/mL (17.1 μM) against a clinical isolate of MRSA obtained from an adult cystic fibrosis patient. The biocidal activity occurred within 30 min of exposure and resulted in changes to the bacterial cell surface as visualized with a scanning electron microscope. Taken together, these studies demonstrate that EIPE-1 is effective at killing MRSA.
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Affiliation(s)
- Santosh Adhikari
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Martha A Essandoh
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - William C Starr
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Prakash Sah
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Colleen N La Force
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Rawan G Eleshy
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Erika I Lutter
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Toby L Nelson
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
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2
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Loftus LM, Olson EC, Stewart DJ, Phillips AT, Arumugam K, Cooper TM, Haley JE, Grusenmeyer TA. Zn Coordination and the Identity of the Halide Ancillary Ligand Dramatically Influence the Excited-State Dynamics and Bimolecular Reactions of 2,3-Di(pyridin-2-yl)benzo[ g]quinoxaline. Inorg Chem 2021; 60:16570-16583. [PMID: 34662517 DOI: 10.1021/acs.inorgchem.1c02484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The optical properties of coordination complexes with ligands containing nitrogen heterocycles have been extensively studied for decades. One subclass of these materials, metal complexes utilizing substituted pyrazines and quinoxalines as ligands, has been employed in a variety of photochemical applications ranging from photodynamic therapy to organic light-emitting diodes. A vast majority of this work focuses on characterization of the metal-to-ligand charge-transfer states in these metal complexes; however, literature reports rarely investigate the photophysics of the parent pyrazine or quinoxaline ligand or perform control experiments utilizing metal complexes that lack low-lying charge-transfer (CT) states in order to determine how metal-atom coordination influences the photophysical properties of the ligand. With this in mind, we examined the steady-state and time-resolved photophysics of 2,3-di(pyridin-2-yl)benzo[g]quinoxaline (dpb) and explored how the coordination of ZnX2 (X = Cl-, Br-, I-) affects the photophysical properties of dpb. In dpb, we find that the dominant mode of deactivation from the singlet excited state is intersystem crossing (ISC). Coordination of ZnX2 perturbs the relative energies of the ππ* and nπ* excited states of dpb, leading to drastically different rates of ISC as well as radiative and nonradiative decay in the [Zn(dpb)X2] complexes compared to dpb. These differences in the rates change the dominant singlet-excited-state decay pathway from ISC in dpb to a mixture of ISC and fluorescence in [Zn(dpb)Cl2] and [Zn(dpb)Br2] and to nonradiative decay in [Zn(dpb)I2]. Coordination of ZnX2 and the choice of the halide ligand also have profound effects on the rate constants for excited-state bimolecular reactions, including triplet-triplet annihilation and oxygen quenching. These results demonstrate that metal coordination, even in complexes lacking low-lying CT states, and the choice of the ancillary ligand can dramatically alter the photophysical properties of chromophores containing nitrogen heterocycles.
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Affiliation(s)
- Lauren M Loftus
- Materials and Manufacturing Directorate, Functional Materials Division, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750, United States.,General Dynamics Information Technology, 5100 Springfield Pike, Dayton, Ohio 45431, United States
| | - Emma C Olson
- Materials and Manufacturing Directorate, Functional Materials Division, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750, United States.,Southwestern Ohio Council for Higher Education, Dayton, Ohio 45420, United States
| | - David J Stewart
- Materials and Manufacturing Directorate, Functional Materials Division, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750, United States
| | - Alexis T Phillips
- Materials and Manufacturing Directorate, Functional Materials Division, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750, United States.,Southwestern Ohio Council for Higher Education, Dayton, Ohio 45420, United States
| | - Kuppuswamy Arumugam
- Wright State University, Department of Chemistry, 3640 Colonel Glenn Highway, Dayton, Ohio 45435, United States
| | - Thomas M Cooper
- Materials and Manufacturing Directorate, Functional Materials Division, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750, United States
| | - Joy E Haley
- Materials and Manufacturing Directorate, Functional Materials Division, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750, United States
| | - Tod A Grusenmeyer
- Materials and Manufacturing Directorate, Functional Materials Division, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750, United States
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3
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Nhon L, Shan B, Taggart AD, Wolfe RMW, Li TT, Klug CM, Nayak A, Bullock RM, Cahoon JF, Meyer TJ, Schanze KS, Reynolds JR. Influence of Surface and Structural Variations in Donor-Acceptor-Donor Sensitizers on Photoelectrocatalytic Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2021; 13:47499-47510. [PMID: 34590823 DOI: 10.1021/acsami.1c11879] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Conjugated organic chromophores composed of linked donor (D) and acceptor (A) moieties have attracted considerable attention for photoelectrochemical applications. In this work, we compare the optoelectronic properties and photoelectrochemical performance of two D-A-D structural isomers with thiophene-X-carboxylic acid (X denotes 3 and 2 positions) derivatives and 2,1,3-benzothiadiazole as the D and A moieties, respectively. 5,5'-(Benzo[c][1,2,5]thiadiazole-4,7-diyl)bis(thiophene-3-carboxylic acid), BTD1, and 5,5'-(benzo[c][1,2,5]thiadiazole-4,7-diyl)bis(thiophene-2-carboxylic acid), BTD2, were employed in the study to understand how structural isomers affect surface attachments within chromophore-catalyst assemblies and their influence on charge-transfer dynamics. Crystal structures revealed that varying the position of the -COOH anchoring group causes the molecules to either contort out of a plane (BTD1) or adopt a near-perfect planar conformation (BTD2). BTD1 and BTD2 were co-loaded with either a water oxidation catalyst, [Ru(2,6-bis(1-methylbenzimidazol-2-yl)pyridine)-(4,4'-((HO)2OPCH2)2-2,2'-bipyridine)(OH2)]2, RuCt2+, or proton reduction catalyst [Ni(P2PhN2C6H4CH2PO3H2)2]2+, NiCt2+, on oxide electrodes to facilitate photodriven water splitting reactions. Emission quenching measurements indicate that both BTD1 and BTD2 inject electrons into n-type SnO2|TiO2 electrodes and holes into p-type NiO semiconductors from their respective excited states at high efficiencies >60%. Photocurrent densities of chromophore-catalyst assemblies obtained using linear sweep voltammetry (LSV) show that BTD2-sensitized photoanodes generate significantly more photocurrent than BTD1-sensitized electrodes; however, both exhibit similar performances at the photocathode. Photoelectrocatyltic measurements demonstrate that both BTD1 and BTD2 performed similarly, generating Faradaic efficiencies of 39 and 38% at the anode or 61 and 79% at the cathode. Transient absorption measurements suggest that the differences between the LSV and photoelectrocatalytic measurements result from the differences in quantum yields of the photogenerated redox equivalents, which is also a reflection of the varying metal oxide surface conformation. Our findings suggest that BTD2 should be investigated further in photocathodic studies since it has the structural advantage of being incorporated into diverse types of chromophore-catalyst assemblies.
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Affiliation(s)
- Linda Nhon
- School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Bing Shan
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Aaron D Taggart
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Rylan M W Wolfe
- School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Ting-Ting Li
- Research Center of Applied Solid State Chemistry, Ningbo University, Ningbo 315211, China
| | - Christina M Klug
- Center for Molecular Electrocatalysis, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
| | - Animesh Nayak
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - R Morris Bullock
- Center for Molecular Electrocatalysis, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
| | - James F Cahoon
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Thomas J Meyer
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Kirk S Schanze
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - John R Reynolds
- School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Zhu D, Wagner P, Xiao P. Terthiophene Derivative-Based Photoinitiating Systems for Free Radical and Cationic Polymerization under Blue LEDs. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Di Zhu
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Pawel Wagner
- ARC Centre of Excellence for Electromaterials Science and the Intelligent Polymer Research Institute, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Pu Xiao
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory 2601, Australia
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5
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Quaternary ammonium functionalized cationic polythiophene for the detection and imaging of gram-positive bacteria. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03642-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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New Approach in the Application of Conjugated Polymers: The Light-Activated Source of Versatile Singlet Oxygen Molecule. MATERIALS 2021; 14:ma14051098. [PMID: 33652904 PMCID: PMC7956640 DOI: 10.3390/ma14051098] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/23/2021] [Accepted: 02/23/2021] [Indexed: 01/17/2023]
Abstract
For many years, the research on conjugated polymers (CPs) has been mainly focused on their application in organic electronics. Recent works, however, show that due to the unique optical and photophysical properties of CPs, such as high absorption in UV–Vis or even near-infrared (NIR) region and efficient intra-/intermolecular energy transfer, which can be relatively easily optimized, CPs can be considered as an effective light-activated source of versatile and highly reactive singlet oxygen for medical or catalytic use. The aim of this short review is to present the novel possibilities that lie dormant in those exceptional polymers with the extended system of π-conjugated bonds.
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7
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Yuan Q, Zhao Y, Zhang Z, Tang Y. On-Demand Antimicrobial Agent Release from Functionalized Conjugated Oligomer-Hyaluronic Acid Nanoparticles for Tackling Antimicrobial Resistance. ACS APPLIED MATERIALS & INTERFACES 2021; 13:257-265. [PMID: 33378174 DOI: 10.1021/acsami.0c19283] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Controllable drug release is promising for fighting against antimicrobial resistance, which is a critical threat to human health worldwide. Herein, new hyaluronidase-responsive conjugated oligo(thiophene ethynylene) (OTE)-covalently modified hyaluronic acid (OTE-HA) nanoparticles for on-demand release of antimicrobial agents are reported. The synthesis of amphiphilic OTE-HA was carried out by esterification reaction. The resulting macromolecules were self-assembled in water to form nanoparticles, in which the hydrophobic OTE section, as bactericides, formed "cores" and the hydrophilic hyaluronic acid (HA) formed "shells". The OTE-HA nanoparticles avoid bactericide premature leakage and effectively block the dark cytotoxicity of the OTE section, possessing excellent biocompatibility. Using methicillin-resistant Staphylococcus aureus (MRSA) as an example, hyaluronidase, largely secreted by MRSA, can in situ trigger the release of OTE via hydrolyzing OTE-HA nanoparticles into fragments, even disaccharides linked with OTE. Importantly, the OTE section could effectively break cell membranes, leading to bacterial death. The half-maximal inhibitory concentration of the nanoparticles against MRSA is 3.3 μg/mL. The great antibacterial activity of OTE-HA nanoparticles against Gram-positive bacteria Streptococcus pneumoniae further confirms the controllable bactericide delivery mechanism. OTE-HA nanoparticles coated on a surface can also effectively inhibit the growth of bacteria, which holds a remarkable promise in biomedical applications. Therefore, this work provides a favorable strategy of on-demand and in situ drug release for sterilization and defeating antimicrobial resistance.
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Affiliation(s)
- Qiong Yuan
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China
| | - Yantao Zhao
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China
| | - Ziqi Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China
| | - Yanli Tang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China
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8
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Hayashi Y, Morimoto A, Maeda T, Enoki T, Ooyama Y, Matsui Y, Ikeda H, Yagi S. Synthesis of novel π-extended D–A–D-type dipyrido[3,2- a:2′,3′- c]phenazine derivatives and their photosensitized singlet oxygen generation. NEW J CHEM 2021. [DOI: 10.1039/d0nj05526c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Electron donor–acceptor–donor (D–A–D) π-conjugated molecules based on dipyrido[3,2-a:2′,3′-c]phenazine (dppz) were developed as photosensitizers for singlet oxygen generation.
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Affiliation(s)
- Yuichiro Hayashi
- Department of Applied Chemistry, Graduate School of Engineering
- Osaka Prefecture University
- Japan
| | - Ami Morimoto
- Department of Applied Chemistry, Graduate School of Engineering
- Osaka Prefecture University
- Japan
| | - Takeshi Maeda
- Department of Applied Chemistry, Graduate School of Engineering
- Osaka Prefecture University
- Japan
| | - Toshiaki Enoki
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University
- Japan
| | - Yousuke Ooyama
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University
- Japan
| | - Yasunori Matsui
- Department of Applied Chemistry, Graduate School of Engineering
- Osaka Prefecture University
- Japan
| | - Hiroshi Ikeda
- Department of Applied Chemistry, Graduate School of Engineering
- Osaka Prefecture University
- Japan
| | - Shigeyuki Yagi
- Department of Applied Chemistry, Graduate School of Engineering
- Osaka Prefecture University
- Japan
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9
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Johnson KR, Lombardi VC, Bettencourt‐Dias A. Photocytotoxicity of Oligothienyl‐Functionalized Chelates That Sensitize LnIIILuminescence and Generate1O2. Chemistry 2020; 26:12060-12066. [DOI: 10.1002/chem.202001568] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/22/2020] [Indexed: 01/11/2023]
Affiliation(s)
| | - Vincent C. Lombardi
- Department of Microbiology and ImmunologyUniversity of Nevada, Reno Reno NV 89557 USA
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10
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Scheberl A, Khalil ML, Maghsoodi F, Strach EW, Yang J, Chi EY, Schanze KS, Reimhult E, Whitten DG. Quantitative Determination of Dark and Light-Activated Antimicrobial Activity of Poly(Phenylene Ethynylene), Polythiophene, and Oligo(Phenylene Ethynylene) Electrolytes. ACS APPLIED MATERIALS & INTERFACES 2020; 12:21322-21329. [PMID: 32259428 DOI: 10.1021/acsami.0c02939] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Much recent effort has been directed toward the development of novel antimicrobial materials able to defeat new and antibiotic resistant pathogens. In this report, we study the efficacy of cationic poly(phenylene ethynylene), polythiophene, and oligo(phenylene ethynylene) electrolytes against laboratory strains of Pseudomonas aeruginosa, Staphylococcus aureus and Staphylococcus epidermidis. The focus of the study is to quantitatively evaluate the speed and extent of dark and light-activated antimicrobial activity. Using cell plating with serial dilutions, we determined that planktonic bacteria suspensions exposed to the antimicrobials (at 10 μg/mL) result in several log kills at 10 min both in the dark and under UV irradiation (360 nm) for all eight synthetic antimicrobials. However, there are significant differences in the ease of killing the different pathogens. In most trials, there is significantly greater killing under light-irradiation, indicating these materials may be used as versatile disinfectants.
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Affiliation(s)
- Andrea Scheberl
- Department of Nanobiotechnology University of Natural Resources and Life Sciences, Vienna (BOKU Wien) Muthgasse 11-II, Vienna A-1190, Austria
| | - Mohammed L Khalil
- Department of Chemical and Biological Engineering Center for Biomedical Engineering University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
| | - Fahimeh Maghsoodi
- Department of Chemical and Biological Engineering Center for Biomedical Engineering University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
| | - Edward W Strach
- Department of Chemical and Biological Engineering Center for Biomedical Engineering University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
| | - Jianzhong Yang
- Department of Chemical and Biological Engineering Center for Biomedical Engineering University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
| | - Eva Y Chi
- Department of Chemical and Biological Engineering Center for Biomedical Engineering University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
| | - Kirk S Schanze
- Department of Chemistry, University of Texas at San Antonio, One UTSA Way, San Antonio, Texas 78249, United States
| | - Erik Reimhult
- Department of Nanobiotechnology University of Natural Resources and Life Sciences, Vienna (BOKU Wien) Muthgasse 11-II, Vienna A-1190, Austria
| | - David G Whitten
- Department of Chemical and Biological Engineering Center for Biomedical Engineering University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
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11
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Zhao Q, Zhao Y, Lu Z, Tang Y. Amino Acid-Modified Conjugated Oligomer Self-Assembly Hydrogel for Efficient Capture and Specific Killing of Antibiotic-Resistant Bacteria. ACS APPLIED MATERIALS & INTERFACES 2019; 11:16320-16327. [PMID: 30985103 DOI: 10.1021/acsami.9b02643] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Bacterial infection is one of main causes that threaten global human health. Especially, antibiotic-resistant bacteria like methicillin-resistant Staphylococcus aureus (MRSA) lead to high mortality rate and more expensive treatment cost. Here, a novel amino-acid-modified conjugated oligomer OTE-d-Phe was synthesized by modifying the side chain of conjugated oligo(thiophene ethynylene) with d-phenylalanine. By mixing 9-fluorenylmethyloxycarbonyl-l-phenylalanin (Fmoc-l-Phe) with OTE-d-Phe, a new and biocompatible low-molecular weight hydrogel (HG-2) was prepared through self-assembly. In solution, HG-2 can effectively capture bacteria spontaneously, such as Escherichia coli and MRSA. Most importantly, the hydrogel has specific and strong antibacterial activity against MRSA over methicillin-susceptible S. aureus, Staphylococcus epidermidis, and E. coli. Interestingly, when the hydrogel was put on a model surface, a piece of cloth, it also is able to selectively kill MRSA with low cell cytotoxicity. The antibacterial mechanism was investigated, and it demonstrated that the HG-2 interacts with and physically breaks the cell wall and membrane, which leads to MRSA death. Therefore, this new conjugated oligomer-based hydrogel provides promising applications in disinfection and therapy of MRSA in hospital and in community.
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Affiliation(s)
- Qi Zhao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710062 , P. R. China
| | - Yantao Zhao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710062 , P. R. China
| | - Zhuanning Lu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710062 , P. R. China
| | - Yanli Tang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710062 , P. R. China
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12
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Wang B, Queenan BN, Wang S, Nilsson KPR, Bazan GC. Precisely Defined Conjugated Oligoelectrolytes for Biosensing and Therapeutics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1806701. [PMID: 30698856 DOI: 10.1002/adma.201806701] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/25/2018] [Indexed: 06/09/2023]
Abstract
Conjugated oligoelectrolytes (COEs) are a relatively new class of synthetic organic molecules with, as of yet, untapped potential for use in organic optoelectronic devices and bioelectronic systems. COEs also offer a novel molecular approach to biosensing, bioimaging, and disease therapy. Substantial progress has been made in the past decade at the intersection of chemistry, materials science, and the biological sciences developing COEs and their polymer analogues, namely, conjugated polyelectrolytes (CPEs), into synthetic systems with biological and biomedical utility. CPEs have traditionally attracted more attention in arenas of sensing, imaging, and therapy. However, the precisely defined molecular structures and interactions of COEs offer potential key advantages over CPEs, including higher reliability and fluorescence quantum efficiency, larger diversity of subcellular targeting strategies, and improved selectivity to biomolecules. Here, the unique-and sometimes overlooked-properties of COEs are discussed and the noticeable progress in their use for biological sensing, imaging, and therapy is reviewed.
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Affiliation(s)
- Bing Wang
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Bridget N Queenan
- Department of Mechanical Engineering, Neuroscience Research Institute, University of California, Santa Barbara, CA, 93106, USA
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - K Peter R Nilsson
- Division of Chemistry, Department of Physics, Chemistry and Biology, Linköping University, Linköping, SE, -581 83, Sweden
| | - Guillermo C Bazan
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
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13
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Zhang AN, Wu W, Zhang C, Wang QY, Zhuang ZN, Cheng H, Zhang XZ. A versatile bacterial membrane-binding chimeric peptide with enhanced photodynamic antimicrobial activity. J Mater Chem B 2019; 7:1087-1095. [PMID: 32254776 DOI: 10.1039/c8tb03094d] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Photodynamic therapy (PDT) has become an effective antibiosis method for overcoming antibiotic resistance. In this study, we developed a versatile bacterial membrane-binding chimeric peptide PpIX-[PEG8-(KLAKLAK)2]2 (denoted as PPK) by conjugating a photosensitizer protoporphyrin IX (PpIX) with an antimicrobial peptide (KLAKLAK)2 (KLA) for effective photodynamic inactivation of bacteria. The chimeric peptide PPK with positively charged properties and an α-helical conformation could rapidly bind to microbial cells through electrostatic interactions and membrane insertion. Moreover, PPK could disrupt the bacterial membrane and further elicit lipid bilayer leakage to kill bacteria by toxic reactive oxygen species (ROS) generated by PpIX under 660 nm light. In vitro experiments demonstrated that cationic PPK possessed excellent antimicrobial activity against both Gram-positive bacteria Staphylococcus aureus (S. aureus) and Gram-negative bacteria Escherichia coli (E. coli). Afterward, PPK also exhibited perfect therapeutic effects on S. aureus-infected mice without any systemic side effects. This chimeric peptide PPK will show great potential for photodynamic antibiosis.
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Affiliation(s)
- Ai-Nv Zhang
- College of Pharmacy, Hubei University of Medicine, Shiyan 442000, P. R. China
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14
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Serrano MP, Rafti M, Thomas AH, Borsarelli CD. Photosensitizing properties of hollow microcapsules built by multilayer self-assembly of poly(allylamine hydrochloride) modified with rose Bengal. RSC Adv 2019; 9:19226-19235. [PMID: 35516879 PMCID: PMC9065151 DOI: 10.1039/c9ra03153g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 06/11/2019] [Indexed: 12/17/2022] Open
Abstract
A polymeric photosensitizer based on poly(allylamine hydrochloride) (PAH) and rose Bengal (RB) was synthesized. The modified polycation PAH-RB was demonstrated to be suitable for construction of microcapsules via a layer-by-layer (LbL) assembly technique, using sodium poly(styrene sulfonate) (PSS) as counter-polyelectrolyte and CaCO3 microcrystals as templates. After CaCO3 core removal, a stable suspension of hollow microcapsules with shells incorporating RB (HM-RB) was obtained. The spectroscopic and photophysical behavior of both PAH-RB and HM-RB in aqueous environments were studied and described in terms of dye–dye interactions and dye hydrophobicity. Only HM-RB was able to generate singlet molecular oxygen with similar efficiency to free RB in air-saturated solutions upon green light irradiation. In order to explore possible practical applications as a supramolecular photosensitizer, experiments of HM-RB irradiation in the presence of chemically and biologically relevant target molecules were carried out. It was observed that is possible to use visible light to initiate the photooxidation of biological compounds in water, with many interesting advantages compared to low-molecular-weight photosensitizers such as an enhancement of the photosensitizing effect, due to a significant reduction of dye–dye interaction, or improved reuse given the straightforward size-based separation from the reaction mixture without loss of efficiency. We explored a novel strategy directed to the improvement of rose Bengal fluorescence emission and photosensitization properties by supramolecular assembly into hollow microcapsules using LbL technique.![]()
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Affiliation(s)
- Mariana P. Serrano
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- CCT La Plata-CONICET
| | - Matías Rafti
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- CCT La Plata-CONICET
| | - Andrés H. Thomas
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- CCT La Plata-CONICET
| | - Claudio D. Borsarelli
- Instituto de Bionanotecnología del NOA (INBIONATEC)
- CONICET. Universidad Nacional de Santiago del Estero (UNSE)
- G4206XCP Santiago del Estero
- Argentina
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15
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Stewart DJ, Shi J, Naranjo TR, Grusenmeyer TA, Artz JM, McCleese CL, O'Donnell RM, Cooper TM, Shensky WM, Haley JE. Manipulating triplet states: tuning energies, absorption, lifetimes, and annihilation rates in anthanthrene derivatives. Phys Chem Chem Phys 2018; 20:28412-28418. [PMID: 30403238 DOI: 10.1039/c8cp06048g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The photophysical properties of anthanthrene, four anthanthrene derivatives containing varying phenyl and p-tBu-phenyl substituents, and two anthanthrones with phenyl and p-tBu-phenyl substituents are examined. In general, as the anthanthrenes and anthanthrones become more substituted, red-shifts are observed in the peak maxima of the ground- and excited-state absorption and fluorescence spectra. The anthanthrones have large (>0.8) intersystem crossing (ISC) quantum yields (ΦT) likely caused by nπ* character in the ground or excited states. A bromo-substituted anthanthrene has a unity ISC yield due to an ISC rate constant of 2.5 × 1010 s-1 caused by heavy-atom induced, spin-orbit coupling. This leads to low fluorescence quantum yields (ΦF) in these three derivatives. The parent anthanthrene and remaining derivatives behave much differently. All have ΦF values from 0.58-0.84 with lower ΦT values as radiative decay outcompetes ISC. The anthanthrones have remarkable excited-state absorption with strong, broad transitions across the visible region with weaker transitions extending to nearly two μm. The anthanthrenes have very similar-shaped, broad transitions in the visible which can be shifted ∼60 nm by controlling the substituents. The triplet lifetimes range from 31-1200 μs and increase as the ISC yields decrease; the bromo-substituted anthanthrene is the shortest, followed by the anthanthrones then the other anthanthrenes. The rate of triplet-triplet annihilation is also affected by the presence of substituents; as the amount of steric bulk is increased, the rate of annihilation decreases.
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Affiliation(s)
- David J Stewart
- Air Force Research Laboratory, Materials and Manufacturing Directorate, Functional Materials Division, Wright-Patterson AFB, Ohio 45433-7750, USA.
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16
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Chen J, Shan J, Xu Y, Su P, Tong L, Yuwen L, Weng L, Bao B, Wang L. Polyhedral Oligomeric Silsesquioxane (POSS)-Based Cationic Conjugated Oligoelectrolyte/Porphyrin for Efficient Energy Transfer and Multiamplified Antimicrobial Activity. ACS APPLIED MATERIALS & INTERFACES 2018; 10:34455-34463. [PMID: 30211531 DOI: 10.1021/acsami.8b09185] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cationic quaternary ammonium (QA) groups and reactive oxygen species as two main approaches for antibacterial study have been intensively studied. Herein, we report a multifunctional antimicrobial agent (porphyrin-POSS-OPVE, PPO), which combines bacterial membrane intercalation, high density of local QA groups, efficient energy transfer, significantly reduced aggregation, and high water solubility into one single molecule. The light-harvesting PPO contains multiple donor-absorbing arms (oligo( p-phenylenevinylene) electrolytes, OPVEs) on its globular periphery and a central porphyrin acceptor in the core by using three-dimensional nanocages (polyhedral oligomeric silsesquioxanes, POSSs) as bridges. The antiaggregation ability of POSS and the highly efficient energy transfer from multiple OPVE arms to porphyrin could greatly amplify singlet oxygen generation in PPO. Particularly, OPVEs with QA terminal chains were able to intercalate into Escherichia coli membranes, which facilitated 1O2 diffusion and bacterial cell membrane disintegration by QA groups. The increased local cationic QA charges in OPVE arms can also enhance the biocidal activity of PPO. Benefiting from these satisfactory features, PPO exhibits multiamplified antibacterial efficacy under a very low concentration level and white light dose (400-700 nm, 6 mW·cm-2, 5 min, 1.8 J·cm-2) to Escherichia coli (8 μM) and Staphylococcus aureus (500 nM). Therefore, PPO shows great potential for photodynamic antimicrobial chemotherapy at a much lower irradiation light dose and photosensitizer concentration level compared to previous reports.
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Affiliation(s)
- Jia Chen
- Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts and Telecommunications , Nanjing 210023 , Jiangsu , China
| | - Jingyang Shan
- Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts and Telecommunications , Nanjing 210023 , Jiangsu , China
| | - Yu Xu
- Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts and Telecommunications , Nanjing 210023 , Jiangsu , China
| | - Peng Su
- Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts and Telecommunications , Nanjing 210023 , Jiangsu , China
| | - Li Tong
- Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts and Telecommunications , Nanjing 210023 , Jiangsu , China
| | - Lihui Yuwen
- Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts and Telecommunications , Nanjing 210023 , Jiangsu , China
| | - Lixing Weng
- Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts and Telecommunications , Nanjing 210023 , Jiangsu , China
| | - Biqing Bao
- Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts and Telecommunications , Nanjing 210023 , Jiangsu , China
| | - Lianhui Wang
- Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts and Telecommunications , Nanjing 210023 , Jiangsu , China
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17
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Zhao Y, Lu Z, Dai X, Wei X, Yu Y, Chen X, Zhang X, Li C. Glycomimetic-Conjugated Photosensitizer for Specific Pseudomonas aeruginosa Recognition and Targeted Photodynamic Therapy. Bioconjug Chem 2018; 29:3222-3230. [DOI: 10.1021/acs.bioconjchem.8b00600] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yu Zhao
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhentan Lu
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaomei Dai
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaosong Wei
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yunjian Yu
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xuelei Chen
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xinge Zhang
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Chaoxing Li
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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18
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Liang J, Wu P, Tan C, Jiang Y. White light-induced cell apoptosis by a conjugated polyelectrolyte through singlet oxygen generation. RSC Adv 2018; 8:9218-9222. [PMID: 35541876 PMCID: PMC9078657 DOI: 10.1039/c8ra00774h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 02/25/2018] [Indexed: 02/02/2023] Open
Abstract
A cationic conjugated polyelectrolyte (CPE) PPET3 with a poly(p-phenylene ethynylene terthiophene) backbone and quaternary ammonium side chains was designed and synthesized. It serves as an efficient photosensitizer for photodynamic therapy under white light irradiation and induces cell death through the mitochondrial apoptosis pathway.
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Affiliation(s)
- Jiamei Liang
- Department of Chemistry, Tsinghua University Beijing 100084 P. R. China
- The State Key Laboratory of Chemical Oncogenomics, The Graduate School at Shenzhen, Tsinghua University Shenzhen 518055 P. R. China +86-755-26036533
| | - Pan Wu
- Department of Chemistry, Tsinghua University Beijing 100084 P. R. China
- The State Key Laboratory of Chemical Oncogenomics, The Graduate School at Shenzhen, Tsinghua University Shenzhen 518055 P. R. China +86-755-26036533
| | - Chunyan Tan
- Department of Chemistry, Tsinghua University Beijing 100084 P. R. China
- The State Key Laboratory of Chemical Oncogenomics, The Graduate School at Shenzhen, Tsinghua University Shenzhen 518055 P. R. China +86-755-26036533
| | - Yuyang Jiang
- The State Key Laboratory of Chemical Oncogenomics, The Graduate School at Shenzhen, Tsinghua University Shenzhen 518055 P. R. China +86-755-26036533
- School of Pharmaceutical Sciences, Tsinghua University Beijing 100084 P. R. China
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19
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Walalawela N, Greer A. Heterogeneous photocatayltic deperoxidation with UV and visible light. J PHYS ORG CHEM 2018. [DOI: 10.1002/poc.3807] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Niluksha Walalawela
- Department of Chemistry; Brooklyn College; New York NY USA
- Ph.D. Program in Chemistry; The Graduate Center of the City University of New York; New York NY USA
| | - Alexander Greer
- Department of Chemistry; Brooklyn College; New York NY USA
- Ph.D. Program in Chemistry; The Graduate Center of the City University of New York; New York NY USA
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20
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Sun J, Li X, Du K, Feng F. A water soluble donor–acceptor–donor conjugated oligomer as a photosensitizer for mitochondria-targeted photodynamic therapy. Chem Commun (Camb) 2018; 54:9194-9197. [DOI: 10.1039/c8cc05476b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A water soluble donor–acceptor–donor structure with mitochondria-targeting capability exhibits high singlet oxygen generation efficacy for efficient low-energy photodynamic therapy.
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Affiliation(s)
- Jian Sun
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education
- Department of Polymer Science & Engineering
- School of Chemistry & Chemical Engineering
- Nanjing University
- Nanjing
| | - Xiao Li
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education
- Department of Polymer Science & Engineering
- School of Chemistry & Chemical Engineering
- Nanjing University
- Nanjing
| | - Ke Du
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education
- Department of Polymer Science & Engineering
- School of Chemistry & Chemical Engineering
- Nanjing University
- Nanjing
| | - Fude Feng
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education
- Department of Polymer Science & Engineering
- School of Chemistry & Chemical Engineering
- Nanjing University
- Nanjing
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21
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Zhang S, Liu R, Cui Q, Yang Y, Cao Q, Xu W, Li L. Ultrabright Fluorescent Silica Nanoparticles Embedded with Conjugated Oligomers and Their Application in Latent Fingerprint Detection. ACS APPLIED MATERIALS & INTERFACES 2017; 9:44134-44145. [PMID: 29185339 DOI: 10.1021/acsami.7b15612] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fluorescent micro- and nanosized particles have a broad range of applications in biology, medicine, and engineering. For these uses, the materials should have high emission efficiency and good photostability. However, many organic fluorophores suffer from aggregation-induced quenching effects and photobleaching. Here, we used a simple method based on covalently blending a fluorescent conjugated oligomer with silica nanoparticles to achieve emission quantum yields as high as 97%. The resulting system also showed excellent stability under continuous light illumination, in a range of pH values and temperatures, and in common solvents. This fluorescent material showed outstanding properties, including highly efficient blue emission, low cost, low toxicity, and easy synthesis. Furthermore, its effectiveness for latent fingerprint detection was demonstrated as a proof of concept on various substrates. The obtained emissive fingerprint powder gave good optical/fluorescent images with high contrast and resolution between the ridges and spaces.
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Affiliation(s)
- Shijie Zhang
- State Key Lab for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
| | - Ronghua Liu
- State Key Lab for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
| | - Qianling Cui
- State Key Lab for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
| | - Yu Yang
- State Key Lab for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
| | - Qian Cao
- State Key Lab for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
| | - Wenqiang Xu
- State Key Lab for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
| | - Lidong Li
- State Key Lab for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
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22
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Selective biocompatibility and responsive imaging property of cationic conjugated polyelectrolyte to cancer cells. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2017.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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23
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Jain R, Abbasi R, Nelson K, Busche D, Lynn DM, Abbott NL. Generation of Gaseous ClO 2 from Thin Films of Solid NaClO 2 by Sequential Exposure to Ultraviolet Light and Moisture. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16594-16603. [PMID: 28409922 DOI: 10.1021/acsami.6b16570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report that thin films of solid sodium chlorite (NaClO2) can be photochemically activated by irradiation with ultraviolet (UV) light to generate gaseous chlorine dioxide (ClO2) upon subsequent exposure to moisture. The limiting role of water in the reaction is evidenced by an increase in yield of ClO2 with relative humidity of the gas stream passed over the UV-activated salt. The UV-activated state of the NaClO2 was found to possess a half-life of 48 h, revealing the presence of long-lived UV activated species that subsequently react with water to produce gaseous ClO2. The yield of ClO2 was determined to be proportional to the surface area of NaClO2 particles projected to the incident illumination, consistent with activation of a ∼10 nm-thick layer of NaClO2 at the surface of the micrometer-sized salt crystals (for an activation wavelength of 254 nm). We also found that the quantity of ClO2 released can be tuned ∼10-fold by varying wavelength of UV irradiation and relative humidity of the gas stream passed over the UV-activated NaClO2. The UV-activated species were not detectable by electron paramagnetic resonance spectroscopy, indicating that the activated intermediate is not an excited triplet state of ClO2-. Additionally, neither X-ray photoelectron spectroscopy, nor Raman spectroscopy, nor attenuated total reflection infrared spectroscopy revealed the identity of the activated intermediate species. The ability to preactivate solid phase chlorite salt for subsequent generation of ClO2 upon exposure to moisture suggests the basis of new materials and methods that permit triggered release of ClO2 in contexts that use its disinfectant properties.
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Affiliation(s)
- Rishabh Jain
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison , 1415 Engineering Drive, Madison, Wisconsin 53706, United States
- Bemis Company, Inc. , 2301 Industrial Drive, Neenah, Wisconsin 54956, United States
| | - Reza Abbasi
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison , 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Kevin Nelson
- Bemis Company, Inc. , 2301 Industrial Drive, Neenah, Wisconsin 54956, United States
| | - David Busche
- Bemis Company, Inc. , 2301 Industrial Drive, Neenah, Wisconsin 54956, United States
| | - David M Lynn
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison , 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Nicholas L Abbott
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison , 1415 Engineering Drive, Madison, Wisconsin 53706, United States
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24
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Wang B, Wang M, Mikhailovsky A, Wang S, Bazan GC. A Membrane‐Intercalating Conjugated Oligoelectrolyte with High‐Efficiency Photodynamic Antimicrobial Activity. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701146] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Bing Wang
- Center for Polymers and Organic Solids Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
| | - Ming Wang
- Center for Polymers and Organic Solids Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
| | - Alexander Mikhailovsky
- Center for Polymers and Organic Solids Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
| | - Shu Wang
- Beijing National Laboratory for Molecular Science Key Laboratory of Organic Solids, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P.R. China
| | - Guillermo C. Bazan
- Center for Polymers and Organic Solids Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
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25
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Wang B, Wang M, Mikhailovsky A, Wang S, Bazan GC. A Membrane‐Intercalating Conjugated Oligoelectrolyte with High‐Efficiency Photodynamic Antimicrobial Activity. Angew Chem Int Ed Engl 2017; 56:5031-5034. [DOI: 10.1002/anie.201701146] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Bing Wang
- Center for Polymers and Organic Solids Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
| | - Ming Wang
- Center for Polymers and Organic Solids Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
| | - Alexander Mikhailovsky
- Center for Polymers and Organic Solids Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
| | - Shu Wang
- Beijing National Laboratory for Molecular Science Key Laboratory of Organic Solids, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P.R. China
| | - Guillermo C. Bazan
- Center for Polymers and Organic Solids Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
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26
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Wurtzler EM, Wendell D. Selective Photocatalytic Disinfection by Coupling StrepMiniSog to the Antibody Catalyzed Water Oxidation Pathway. PLoS One 2016; 11:e0162577. [PMID: 27617441 PMCID: PMC5019378 DOI: 10.1371/journal.pone.0162577] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 08/24/2016] [Indexed: 01/07/2023] Open
Abstract
For several decades reactive oxygen species have been applied to water quality engineering and efficient disinfection strategies; however, these methods are limited by disinfection byproduct and catalyst-derived toxicity concerns which could be improved by selectively targeting contaminants of interest. Here we present a targeted photocatalytic system based on the fusion protein StrepMiniSOG that uses light within the visible spectrum to produce reactive oxygen species at a greater efficiency than current photosensitizers, allowing for shorter irradiation times from a fully biodegradable photocatalyst. The StrepMiniSOG photodisinfection system is unable to cross cell membranes and like other consumed proteins, can be degraded by endogenous digestive enzymes in the human gut, thereby reducing the consumption risks typically associated with other disinfection agents. We demonstrate specific, multi-log removal of Listeria monocytogenes from a mixed population of bacteria, establishing the StrepMiniSOG disinfection system as a valuable tool for targeted pathogen removal, while maintaining existing microbial biodiversity.
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Affiliation(s)
- Elizabeth M. Wurtzler
- Department of Biological, Chemical, and Environmental Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - David Wendell
- Department of Biological, Chemical, and Environmental Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, Ohio, United States of America
- * E-mail:
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27
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Cekli S, Winkel RW, Alarousu E, Mohammed OF, Schanze KS. Triplet excited state properties in variable gap π-conjugated donor-acceptor-donor chromophores. Chem Sci 2016; 7:3621-3631. [PMID: 29997854 PMCID: PMC6008705 DOI: 10.1039/c5sc04578a] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 02/12/2016] [Indexed: 11/21/2022] Open
Abstract
A series of variable band-gap donor-acceptor-donor (DAD) chromophores capped with platinum(ii) acetylide units has been synthesized and fully characterized by electrochemical and photophysical methods, with particular emphasis placed on probing triplet excited state properties. A counter-intuitive trend of increasing fluorescence quantum efficiency and lifetime with decreasing excited state energy (optical gap) is observed across the series of DAD chromophores. Careful study of the excited state dynamics, including triplet yields (as inferred from singlet oxygen sensitization), reveals that the underlying origin of the unusual trend in the fluorescence parameters is that the singlet-triplet intersystem crossing rate and yield decrease with decreasing optical gap. It is concluded that the rate of intersystem crossing decreases as the LUMO is increasingly localized on the acceptor unit in the DAD chromophore, and this result is interpreted as arising because the extent of spin-orbit coupling induced by the platinum heavy metal centers decreases as the LUMO is more localized on the acceptor. In addition to the trend in intersystem crossing, the results show that the triplet decay rates follow the Energy Gap Law correlation over a 1.8 eV range of triplet energy and 1000-fold range of triplet decay rates. Finally, femtosecond transient absorption studies for the DAD chromophores reveals a strong absorption in the near-infrared region which is attributed to the singlet excited state. This spectral band appears to be general for DAD chromophores, and may be a signature of the charge transfer (CT) singlet excited state.
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Affiliation(s)
- Seda Cekli
- Department of Chemistry and Center for Macromolecular Science and Engineering , University of Florida , Gainesville , Florida 32611-7200 , USA .
| | - Russell W Winkel
- Department of Chemistry and Center for Macromolecular Science and Engineering , University of Florida , Gainesville , Florida 32611-7200 , USA .
| | - Erkki Alarousu
- Solar and Photovoltaics Engineering Research Center , Division of Physical Sciences and Engineering , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Kingdom of Saudi Arabia
| | - Omar F Mohammed
- Solar and Photovoltaics Engineering Research Center , Division of Physical Sciences and Engineering , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Kingdom of Saudi Arabia
| | - Kirk S Schanze
- Department of Chemistry and Center for Macromolecular Science and Engineering , University of Florida , Gainesville , Florida 32611-7200 , USA .
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28
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Zhao Q, Li J, Zhang X, Li Z, Tang Y. Cationic Oligo(thiophene ethynylene) with Broad-Spectrum and High Antibacterial Efficiency under White Light and Specific Biocidal Activity against S. aureus in Dark. ACS APPLIED MATERIALS & INTERFACES 2016; 8:1019-1024. [PMID: 26671682 DOI: 10.1021/acsami.5b11264] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We designed and synthesized a novel oligo(thiophene ethynylene) (OTE) to investigate the antibacterial activities against Gram-positive (Staphylococcus aureus and Staphylococcus epidermidis) and Gram-negative (Ralstonia solanacearum and Escherichia coli) bacteria in vitro by photodynamic therapy (PDT). Notably, OTE presents broad-spectrum and greatly high antibacterial activities after white light irradiation at nanogram per milliliter concentrations. The half inhibitory concentrations (IC50) values obtained for S. aureus, S. epidermidis, E. coli, and R. solanacearum are 8, 13, 24, and 52 ng/mL after illumination for 30 min, respectively, which are lower than that of other PDT agents. Interestingly, OTE shows the specific and very strong dark killing capability against S. aureus at the concentration of 180 ng/mL for 30 min, which is the highest efficiency biocide against S. aureus without the need of irradiation to date. The antibacterial mechanism investigated demonstrated that reactive oxygen species or singlet-oxygen generated by OTE kills bacteria irreversibly upon white light irradiation, and OTE as a v-type oligomer exerts its toxicity directly on destroying bacterial cytoplasmic membrane in the dark. Importantly, the OTE shows no cell cytotoxicity and excellent biocompatibility. The results indicate that it is potential to provide versatile applications in the efficient control of pathogenic organisms and specific application for killing S. aureus.
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Affiliation(s)
- Qi Zhao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an 710062, P. R. China
| | - Junting Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an 710062, P. R. China
| | - Xiaoqian Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an 710062, P. R. China
| | - Zhengping Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an 710062, P. R. China
| | - Yanli Tang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an 710062, P. R. China
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Parthasarathy A, Pappas HC, Hill EH, Huang Y, Whitten DG, Schanze KS. Conjugated Polyelectrolytes with Imidazolium Solubilizing Groups. Properties and Application to Photodynamic Inactivation of Bacteria. ACS APPLIED MATERIALS & INTERFACES 2015; 7:28027-34. [PMID: 26079205 DOI: 10.1021/acsami.5b02771] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
This article reports an investigation of the photophysical properties and the light- and dark-biocidal activity of two poly(phenyleneethynylene) (PPE)-based conjugated polyelectrolytes (CPEs) bearing cationic imidazolium solubilizing groups. The two polymers feature the same PPE-type backbone, but they differ in the frequency of imidazoliums on the chains: PIM-4 features two imidazolium units on every phenylene repeat, whereas PIM-2 contains two imidazolium units on every other phenylene unit. Both polymers are very soluble in water and polar organic solvents, but their propensity to aggregate in water differs with the density of the imidazolium units. The polymers are highly fluorescent, and they exhibit the amplified quenching effect when exposed to a low concentration of anionic electron-acceptor anthraquinone disulfonate. The CPEs are also quenched by a relatively low concentration of pyrophosphate by an aggregation-induced quenching mechanism. The biocidal activity of the cationic imidazolium CPEs was studied against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacteria in the dark and under blue-light illumination. Both polymers are effective biocides, exhibiting greater than 3 log kill with 30-60 min of light exposure at concentrations of ≤10 μg mL(-1).
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Affiliation(s)
- Anand Parthasarathy
- Department of Chemistry, University of Florida , Gainesville, Florida 32611-7200, United States
| | - Harry C Pappas
- Department of Chemical and Biological Engineering and Center for Biomedical Engineering, University of New Mexico , Albuquerque, New Mexico 87131-1341, United States
| | - Eric H Hill
- Department of Chemical and Biological Engineering and Center for Biomedical Engineering, University of New Mexico , Albuquerque, New Mexico 87131-1341, United States
| | - Yun Huang
- Department of Chemistry, University of Florida , Gainesville, Florida 32611-7200, United States
| | - David G Whitten
- Department of Chemical and Biological Engineering and Center for Biomedical Engineering, University of New Mexico , Albuquerque, New Mexico 87131-1341, United States
| | - Kirk S Schanze
- Department of Chemistry, University of Florida , Gainesville, Florida 32611-7200, United States
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Zhang S, Lv G, Wang G, Zhu K, Yu D, Shao J, Wang Y, Liu Y. Facile preparation and fluorescence properties of a soluble oligopyrrole derivative. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.04.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Goswami S, Wicks G, Rebane A, Schanze KS. Photophysics and non-linear absorption of Au(i) and Pt(ii) acetylide complexes of a thienyl-carbazole chromophore. Dalton Trans 2014; 43:17721-8. [DOI: 10.1039/c4dt02123a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Zhao Y, Liu Y, Xu Q, Barahman M, Bartusik D, Greer A, Lyons AM. Singlet oxygen generation on porous superhydrophobic surfaces: effect of gas flow and sensitizer wetting on trapping efficiency. J Phys Chem A 2014; 118:10364-71. [PMID: 24885074 PMCID: PMC4234451 DOI: 10.1021/jp503149x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We describe physical-organic studies of singlet oxygen generation and transport into an aqueous solution supported on superhydrophobic surfaces on which silicon-phthalocyanine (Pc) particles are immobilized. Singlet oxygen ((1)O2) was trapped by a water-soluble anthracene compound and monitored in situ using a UV-vis spectrometer. When oxygen flows through the porous superhydrophobic surface, singlet oxygen generated in the plastron (i.e., the gas layer beneath the liquid) is transported into the solution within gas bubbles, thereby increasing the liquid-gas surface area over which singlet oxygen can be trapped. Higher photooxidation rates were achieved in flowing oxygen, as compared to when the gas in the plastron was static. Superhydrophobic surfaces were also synthesized so that the Pc particles were located in contact with, or isolated from, the aqueous solution to evaluate the relative effectiveness of singlet oxygen generated in solution and the gas phase, respectively; singlet oxygen generated on particles wetted by the solution was trapped more efficiently than singlet oxygen generated in the plastron, even in the presence of flowing oxygen gas. A mechanism is proposed that explains how Pc particle wetting, plastron gas composition and flow rate as well as gas saturation of the aqueous solution affect singlet oxygen trapping efficiency. These stable superhydrophobic surfaces, which can physically isolate the photosensitizer particles from the solution may be of practical importance for delivering singlet oxygen for water purification and medical devices.
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Affiliation(s)
- Yuanyuan Zhao
- Department of Chemistry, College of Staten Island, City University of New York , Staten Island, New York 10314, United States
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Ashraf MA, Ullah S, Ahmad I, Qureshi AK, Balkhair KS, Abdur Rehman M. Green biocides, a promising technology: current and future applications to industry and industrial processes. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:388-403. [PMID: 23983055 DOI: 10.1002/jsfa.6371] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 07/27/2013] [Accepted: 08/23/2013] [Indexed: 06/02/2023]
Abstract
The study of biofilms has skyrocketed in recent years due to increased awareness of the pervasiveness and impact of biofilms. It costs the USA literally billions of dollars every year in energy losses, equipment damage, product contamination and medical infections. But biofilms also offer huge potential for cleaning up hazardous waste sites, filtering municipal and industrial water and wastewater, and forming biobarriers to protect soil and groundwater from contamination. The complexity of biofilm activity and behavior requires research contributions from many disciplines such as biochemistry, engineering, mathematics and microbiology. The aim of this review is to provide a comprehensive analysis of emerging novel antimicrobial techniques, including those using myriad organic and inorganic products as well as genetic engineering techniques, the use of coordination complex molecules, composite materials and antimicrobial peptides and the use of lasers as such or their modified use in combination treatments. This review also addresses advanced and recent modifications, including methodological changes, and biocide efficacy enhancing strategies. This review will provide future planners of biofilm control technologies with a broad understanding and perspective on the use of biocides in the field of green developments for a sustainable future.
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Affiliation(s)
- Muhammad Aqeel Ashraf
- Department of Civil Engineering, Tokyo Institute of Technology, Tokyo, 152-8550, Japan; Department of Geology, University of Malaya, Kuala Lumpur, 50603, Malaysia; Department of Chemistry, University of Malaya, Kuala Lumpur, 50603, Malaysia
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