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Sen P, Sindelo A, Nnaji N, Mack J, Nyokong T. Diiodinated Mono‐ and Dipyridylvinyl
BODIPY
dyes: Photophysicochemical Properties,
in Vitro
Antibacterial Studies, Molecular Docking and Theoretical Calculations. Photochem Photobiol 2022; 99:947-956. [DOI: 10.1111/php.13698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 08/18/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Pinar Sen
- Institute for Nanotechnology Innovation, Department of Chemistry Rhodes University PO Box 94, Makhanda 6140 South Africa
| | - Azole Sindelo
- Institute for Nanotechnology Innovation, Department of Chemistry Rhodes University PO Box 94, Makhanda 6140 South Africa
| | - Nnaemeka Nnaji
- Institute for Nanotechnology Innovation, Department of Chemistry Rhodes University PO Box 94, Makhanda 6140 South Africa
| | - John Mack
- Institute for Nanotechnology Innovation, Department of Chemistry Rhodes University PO Box 94, Makhanda 6140 South Africa
| | - Tebello Nyokong
- Institute for Nanotechnology Innovation, Department of Chemistry Rhodes University PO Box 94, Makhanda 6140 South Africa
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May A, Mack J, Nyokong T. Optical limiting properties of D-π-A BODIPY dyes in the presence and absence of methyl groups at the 1,7-positions. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424620500315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The optical limiting properties of three meso-pentafluorophenylstyrylBODIPY dyes are investigated in the presence and absence of methyl groups at the 1,7-positions that hinder free rotation of the meso-aryl group. Pentafluorophenyl groups are introduced at the meso-position, while 4-diethylaminostyryl groups are introduced at the 3- and/or 5-positions to form dyes with strong donor-[Formula: see text]-acceptor (D-[Formula: see text]-A) properties to enhance the dipole moment of the molecule. Favorable optical limiting properties are obtained for all three dyes, with the highest second-order hyperpolarizability value obtained for a monostyryl dye with no methyl groups at the 1,7-position. Bromination at the 2,6-positions of a 1,7-methyl substituted dye is found to result in second-order hyperpolarizability that is an order of magnitude lower than that calculated for the analogous non-halogenated dye.
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Affiliation(s)
- Aviwe May
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda 6140, South Africa
| | - John Mack
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda 6140, South Africa
| | - Tebello Nyokong
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda 6140, South Africa
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Ndebele N, Hlatshwayo Z, Ngoy BP, Kubheka G, Mack J, Nyokong T. Optical limiting properties of BODIPY dyes substituted with styryl or vinylene groups on the nanosecond timescale. J PORPHYR PHTHALOCYA 2019. [DOI: 10.1142/s108842461930009x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The results of recent studies on the optical limiting properties of BODIPY dyes at 532 and 1064 nm are described and compared. The optical limiting properties of novel 1,7-dimethyl-3,5-di-4-dihydroxyborylstyryl- and 3,5,7-tristyryl-1-methyl-BODIPY dyes were studied in CH2Cl2 and C6H6 and polystyrene thin films using the open aperture Z-scan technique at 532 nm with nanosecond laser pulses to provide an example of how the effective nonlinear absorption coefficient, the third order susceptibility, hyperpolarizability and limiting thresholds can be calculated.
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Affiliation(s)
- Nobuhle Ndebele
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda 6140, South Africa
| | - Zweli Hlatshwayo
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda 6140, South Africa
| | - Bokolombe P. Ngoy
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda 6140, South Africa
| | - Gugu Kubheka
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda 6140, South Africa
| | - John Mack
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda 6140, South Africa
| | - Tebello Nyokong
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda 6140, South Africa
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