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Santos APLA, Deokaran GO, Costa CV, Gama LILM, Mazzini Júnior EG, de Assis AML, de Freitas JD, de Araujo WR, Dias RP, da Silva JCS, Costa LMM, Ribeiro AS. A "turn-off" fluorescent sensor based on electrospun polycaprolactone nanofibers and fluorene(bisthiophene) derivative for nitroaromatic explosive detection. Forensic Sci Int 2021; 329:111056. [PMID: 34736045 DOI: 10.1016/j.forsciint.2021.111056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 09/21/2021] [Accepted: 10/11/2021] [Indexed: 11/17/2022]
Abstract
The preparation of fluorene(bisthiophene)-based fluorescent nanofibers for nitroaromatic explosive detection provides a convenient rapid and low-cost strategy aiming at forensic applications. Polycaprolactone (PCL) and fluorene(bisthiophene) derivative (FBT) nanofibers were obtained by electrospinning technique as a free-standing mat and characterized by SEM, FTIR, thermal analysis and fluorescence spectroscopy. The PCL/FBT nanofibers presented high sensitivity towards 2,4,6-trinitrotoluene (TNT) and picric acid (PA), with fluorescence quenching (turn-off mechanism), and selectivity to another kind of explosives. The free-standing mats were used as a cloth strip that was swiped on surfaces contaminated with TNT traces allowing its visual detection under UV light source. These findings are particularly important for the development of a facile and promising strategy to assembly portable optical devices for nitroaromatic explosive detection.
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Affiliation(s)
- Anna Paula L A Santos
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil
| | - Gerard O Deokaran
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil; Criminalistics Institute of Alagoas, 57020-070, Maceió, AL, Brazil
| | - Cristiane V Costa
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil
| | - Lillia I L M Gama
- Portable Chemical Sensors Lab, Institute of Chemistry, State University of Campinas, 13083-970, Campinas, SP, Brazil
| | - Edu G Mazzini Júnior
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil
| | - Alexandro M L de Assis
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil; Technical and Scientific Section of Alagoas, Federal Police, 57025-080, Maceió, AL, Brazil
| | | | - William R de Araujo
- Portable Chemical Sensors Lab, Institute of Chemistry, State University of Campinas, 13083-970, Campinas, SP, Brazil
| | - Roberta P Dias
- Federal University of Pernambuco, Campus Agreste, 55014-900 Caruaru, PE, Brazil
| | - Júlio C S da Silva
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil
| | - Ligia M M Costa
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil
| | - Adriana S Ribeiro
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil.
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Santos TC, Rodrigues RR, Correia SF, Carlos LD, Ferreira RA, Molina C, Péres LO. UV-converting blue-emitting polyfluorene-based organic-inorganic hybrids for solid state lighting. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.04.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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