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da Rocha Rodrigues R, Caseli L, Péres LO. Langmuir and Langmuir-Blodgett Films of Poly[(9,9-dioctylfluorene)- co-(3-hexylthiophene)] for Immobilization of Phytase: Possible Application as a Phytic Acid Sensor. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10587-10596. [PMID: 32786889 DOI: 10.1021/acs.langmuir.0c01941] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this work, the copolymer poly[(9,9-dioctylfluorene)-co-(3-hexylthiophene)] was employed as a matrix for immobilizing phytase, aiming at the detection of phytic acid. The copolymer was spread on the air-water interface forming Langmuir monolayers and phytase adsorbed from the aqueous subphase. The interactions between the copolymer and the enzyme components were investigated with surface pressure and surface potential-area isotherms, Brewster angle microscopy, and polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS). The enzyme could be incorporated in the monolayers from the aqueous subphase, expanding the copolymer films and maintaining its secondary structure. The polymeric films presented a morphological heterogeneous pattern at the air-water interface because of the ability of their chains to fold and entangle, causing inherent defects in the organization as well as unbalanced lateral distribution at the air-water interface because of the formation of aggregates. The interfacial films were transferred to solid supports as Langmuir-Blodgett films and characterized by PM-IRRAS and scanning electronic microscopy, which showed not only the co-transfer of the enzyme but also the maintenance of their heterogeneous morphological pattern. The enzymatic activity of the blended film was analyzed by UV-vis spectroscopy and allowed the estimation of the value of the Michaelis constant (13.08 mM), demonstrating the feasibility of the system to selectively detect phytic acid for biosensing purposes.
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Affiliation(s)
- Rebeca da Rocha Rodrigues
- Laboratory of Hybrid Materials, Department of Chemistry, Federal University of Sao Paulo (UNIFESP), 210 São Nicolau Street, Diadema, São Paulo, Brazil
| | - Luciano Caseli
- Laboratory of Hybrid Materials, Department of Chemistry, Federal University of Sao Paulo (UNIFESP), 210 São Nicolau Street, Diadema, São Paulo, Brazil
| | - Laura Oliveira Péres
- Laboratory of Hybrid Materials, Department of Chemistry, Federal University of Sao Paulo (UNIFESP), 210 São Nicolau Street, Diadema, São Paulo, Brazil
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Zhang Q, Chang M, Lu Y, Sun Y, Li C, Yang X, Zhang M, Chen Y. A Direct C–H Coupling Method for Preparing π-Conjugated Functional Polymers with High Regioregularity. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02390] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Qiang Zhang
- School of Materials Science & Engineering, Tianjin Key Laboratory for Photoelectric Materials and Devices, Key Laboratory of Display Materials & Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, China
| | - Meijia Chang
- The Centre
of Nanoscale Science and Technology and Key Laboratory of Functional
Polymer Materials, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yan Lu
- School of Materials Science & Engineering, Tianjin Key Laboratory for Photoelectric Materials and Devices, Key Laboratory of Display Materials & Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, China
| | - Yanna Sun
- The Centre
of Nanoscale Science and Technology and Key Laboratory of Functional
Polymer Materials, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Chenxi Li
- The Centre
of Nanoscale Science and Technology and Key Laboratory of Functional
Polymer Materials, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xinlin Yang
- The Centre
of Nanoscale Science and Technology and Key Laboratory of Functional
Polymer Materials, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Mingtao Zhang
- The Centre
of Nanoscale Science and Technology and Key Laboratory of Functional
Polymer Materials, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yongsheng Chen
- The Centre
of Nanoscale Science and Technology and Key Laboratory of Functional
Polymer Materials, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, Nankai University, Tianjin 300071, China
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Chiu HT, Yu CY, Wang YH, Wu SH. Preparation and characterization of binary blends composed of poly(dioctylfluorene-alt-hexylsulfonylthiophene) and nonconjugated polymers. J Appl Polym Sci 2017. [DOI: 10.1002/app.44969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hsien-Tang Chiu
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; 43, Section 4, Keelung Road Taipei 10607 Taiwan
| | - Chin-Yang Yu
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; 43, Section 4, Keelung Road Taipei 10607 Taiwan
| | - Yu-Hsiang Wang
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; 43, Section 4, Keelung Road Taipei 10607 Taiwan
| | - Szu-Han Wu
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; 43, Section 4, Keelung Road Taipei 10607 Taiwan
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Yu CY, Cheng YS. Preparation and characterization of alternating copolymers containing fluorene and hexyl- or perfluorohexyl-substituted thiophene. POLYM INT 2015. [DOI: 10.1002/pi.4765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chin-Yang Yu
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; 43, Section 4, Keelung Road Taipei 10607 Taiwan
| | - Yu-Sheng Cheng
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; 43, Section 4, Keelung Road Taipei 10607 Taiwan
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