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Zhang L, Jiao X, Zhang H, He S, Cheng X. Novel chitosan–naphthalimide–amino acid fluorescent powder for selective detection and removal of Hg2+/Hg+ and Fe2+ in aqueous solution. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02385-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Nogueira SL, Santos Silva H, Lère-Porte JP, Serein-Spirau F, Jarrosson T, Tozoni JR, Marletta A, Silva RA. Optical gap energy study of poly(thienylene-2,5-dialkoxyphenylene) in solid-state films. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 272:120951. [PMID: 35131620 DOI: 10.1016/j.saa.2022.120951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 01/14/2022] [Accepted: 01/23/2022] [Indexed: 06/14/2023]
Abstract
Optical gap energy (Egap) in luminescent π-conjugated polymers presents several difficulties in its determination, particularly when using CW conventional optical spectroscopy, absorption and emission. This happens due to several physicochemical parameter's dependence. Among others, the molecular conformation, intramolecular interactions, structural defects, polymer processability and solvent interaction stand out. In addition, there is a distribution of conjugated segments along the polymeric main chains that differentiate optical absorption transition from emission processes. In other words, these processes do not necessarily occur in the same conjugated segment owing to the very efficient ratios of energy transfer or charge migration in these materials. In this work we present a systematic study of the determination of Egap for the polymer poly(thienylene-2,5-dialkoxyphenylene). We present a comparison between the solution and solid-state film, clearly showing the presence of a polymer-polymer interaction as aggregate species. The goal of this paper is to isolate and aggregate the contribution determination of each species through systematic analysis of optical spectra, as well as to obtain, even on film, the Egap of the isolated polymer which is very similar to the polymer solution at about 2.37 eV. The intersection theory and the voltammetry methods corroborate the experiment and the discussion of the results obtained.
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Affiliation(s)
- S L Nogueira
- Centro Universitário de Patos de Minas - UNIPAM, 31708-054 Patos de Minas, MG, Brazil; Instituto de Física, Universidade Federal de Uberlândia, MG, Brasil.
| | | | - J P Lère-Porte
- Institut Charles Gerhardt, Equipe AM(2)N - Architectures Moléculaires et Matériaux Nanostructurés. ENSCM, Montpellier - France
| | - F Serein-Spirau
- Institut Charles Gerhardt, Equipe AM(2)N - Architectures Moléculaires et Matériaux Nanostructurés. ENSCM, Montpellier - France
| | - T Jarrosson
- Institut Charles Gerhardt, Equipe AM(2)N - Architectures Moléculaires et Matériaux Nanostructurés. ENSCM, Montpellier - France
| | - J R Tozoni
- Instituto de Física, Universidade Federal de Uberlândia, MG, Brasil
| | - A Marletta
- Instituto de Física, Universidade Federal de Uberlândia, MG, Brasil
| | - R A Silva
- Instituto de Física, Universidade Federal de Uberlândia, MG, Brasil
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Fathi P, Roslend A, Mehta K, Moitra P, Zhang K, Pan D. UV-trained and metal-enhanced fluorescence of biliverdin and biliverdin nanoparticles. NANOSCALE 2021; 13:4785-4798. [PMID: 33434263 PMCID: PMC9297654 DOI: 10.1039/d0nr08485a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Increasing the fluorescence quantum yield of fluorophores is of great interest for in vitro and in vivo biomedical imaging applications. At the same time, photobleaching and photodegradation resulting from continuous exposure to light are major considerations in the translation of fluorophores from research applications to industrial or healthcare applications. A number of tetrapyrrolic compounds, such as heme and its derivatives, are known to provide fluorescence contrast. In this work, we found that biliverdin (BV), a naturally-occurring tetrapyrrolic fluorophore, exhibits an increase in fluorescence quantum yield, without exhibiting photobleaching or degradation, in response to continuous ultraviolet (UV) irradiation. We attribute this increased fluorescence quantum yield to photoisomerization and conformational changes in BV in response to UV irradiation. This enhanced fluorescence can be further altered by chelating BV with metals. UV irradiation of BV led to an approximately 10-fold increase in its 365 nm fluorescence quantum yield, and the most favorable combination of UV irradiation and metal chelation led to an approximately 18.5-fold increase in its 365 nm fluorescence quantum yield. We also evaluated these stimuli-responsive behaviors in biliverdin nanoparticles (BVNPs) at the bulk-state and single-particle level. We determined that UV irradiation led to an approximately 2.4-fold increase in BVNP 365 nm quantum yield, and the combination of UV irradiation and metal chelation led to up to a 6.75-fold increase in BVNP 365 nm quantum yield. Altogether, these findings suggest that UV irradiation and metal chelation can be utilized alone or in combination to tailor the fluorescence behavior of imaging probes such as BV and BVNPs at selected wavelengths.
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Affiliation(s)
- Parinaz Fathi
- Departments of Bioengineering, Materials Science and Engineering, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
| | - Ayman Roslend
- Departments of Bioengineering, Materials Science and Engineering, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
| | - Kritika Mehta
- Department of Biochemistry, School of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Parikshit Moitra
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Kai Zhang
- Department of Biochemistry, School of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Dipanjan Pan
- Departments of Bioengineering, Materials Science and Engineering, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA. and Departments of Diagnostic Radiology Nuclear Medicine, Pediatrics, and Chemical and Biomolecular Engineering, University of Maryland School of Medicine and University of Maryland Baltimore County, Baltimore, MD 21201, USA
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Zhang H, Chan-Park MB, Wang M. Functional Polymers and Polymer-Dye Composites for Food Sensing. Macromol Rapid Commun 2020; 41:e2000279. [PMID: 32840324 DOI: 10.1002/marc.202000279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/29/2020] [Indexed: 12/19/2022]
Abstract
The sensitive, safe, and portable detection of food spoilage is becoming unprecedentedly important because it is closely related to the public health and economic development, particularly given the globalization of food supply chain. However, the existing approaches for food monitoring are still limited to meet these requirements. To address this challenge, much research has been done to develop an ideal food sensor that can indicate food quality in real-time in a sensitive and reliable way. So far, many sensors such as time-temperature indicators, smart trademarks, colorimetric tags, electronic noses, and electronic tongues, have been developed and even commercialized. In this feature article, the recent progress of food sensors based on functional polymers, including the molecular design of polymer structures, sensing mechanisms, and relevant processing techniques to fabricate a variety of food sensor devices is reviewed.
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Affiliation(s)
- Hang Zhang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Mingfeng Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
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Xu S, Jia X, Lu J, Zheng L, Lv K, Shu Y, Sun J. Pteridine derivatives: novel low-molecular-weight organogelators and their piezofluorochromism. NEW J CHEM 2020. [DOI: 10.1039/c9nj05922a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Here, π-conjugated compounds based on pteridine derivatives were synthesized and their self-assembling behaviors in a variety of organic solvents and piezofluorochromism were studied.
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Affiliation(s)
- Shenzheng Xu
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130021
- P. R. China
| | - Xiaoyu Jia
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130021
- P. R. China
| | - Jiaxin Lu
- Department of Chemistry
- College of Science
- Northeast Forestry University
- Harbin 150040
- P. R. China
| | - Lianyou Zheng
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University
- The College of Chemistry and The School of Pharmaceutical Sciences
- Jilin University
- Changchun 130021
- P. R. China
| | - Kuo Lv
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130021
- P. R. China
| | - Yuanhong Shu
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130021
- P. R. China
| | - Jingbo Sun
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130021
- P. R. China
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Wang CH, Nesterov EE. Amplifying fluorescent conjugated polymer sensor for singlet oxygen detection. Chem Commun (Camb) 2019; 55:8955-8958. [DOI: 10.1039/c9cc04123k] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A “higher energy gap” concept was used to design an efficient conjugated polymer turn-on amplifying fluorescent sensor for singlet oxygen.
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Affiliation(s)
- Chun-Han Wang
- Department of Chemistry
- Louisiana State University
- Baton Rouge
- USA
| | - Evgueni E. Nesterov
- Department of Chemistry
- Louisiana State University
- Baton Rouge
- USA
- Department of Chemistry and Biochemistry
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Affiliation(s)
- Teresa L. Mako
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Joan M. Racicot
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
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π-Conjugated polymer nanowires: advances and perspectives toward effective commercial implementation. Polym J 2018. [DOI: 10.1038/s41428-018-0062-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Jadoun S, Ashraf S, Riaz U. Microwave-assisted synthesis of copolymers of luminol with anisidine: Effect on spectral, thermal and fluorescence characteristics. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.4212] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sapana Jadoun
- Materials Research Laboratory, Department of Chemistry; Jamia Millia Islamia; New Delhi 110025 India
| | - S.M. Ashraf
- Materials Research Laboratory, Department of Chemistry; Jamia Millia Islamia; New Delhi 110025 India
| | - Ufana Riaz
- Materials Research Laboratory, Department of Chemistry; Jamia Millia Islamia; New Delhi 110025 India
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