1
|
Mittal R, Sharma R, Raghavarao K. Novel adsorption approach for the enrichment of R-Phycoerythrin from marine macroalga Gelidium pusillum. ALGAL RES 2022. [DOI: 10.1016/j.algal.2021.102605] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
2
|
Cesana PT, Li BX, Shepard SG, Ting SI, Hart SM, Olson CM, Martinez Alvarado JI, Son M, Steiman TJ, Castellano FN, Doyle AG, MacMillan DW, Schlau-Cohen GS. A biohybrid strategy for enabling photoredox catalysis with low-energy light. Chem 2022. [DOI: 10.1016/j.chempr.2021.10.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
3
|
Kavery E, Vinodha G, Prabhu S, Renganathan R, Yee CS, Khan MMR. A Combined Experimental and Theoretical Investigation of Perylene Based Dyes as Sensitizer for Dye-Sensitized Solar Cell. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793121090098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
4
|
Pontes MS, Graciano DE, Antunes DR, Santos JS, Arruda GJ, Botero ER, Grillo R, Lima SM, Andrade LHC, Caires ARL, Santiago EF. In vitro and in vivo impact assessment of eco-designed CuO nanoparticles on non-target aquatic photoautotrophic organisms. JOURNAL OF HAZARDOUS MATERIALS 2020; 396:122484. [PMID: 32302886 DOI: 10.1016/j.jhazmat.2020.122484] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 02/28/2020] [Accepted: 03/05/2020] [Indexed: 06/11/2023]
Abstract
This work has assessed the impact of copper oxide nanoparticles (CuONPs), designed via green route, toward photosynthetic apparatus on aquatic photoautotrophic organisms. In order to filling knowledge gaps, in vitro and in vivo assays were performed, using cyanobacterial phycocyanin (C-PC) from Arthrospira platensis and Lemna valdiviana plants (duckweed), respectively. Impairment in light energy transfer became evident in C-PC exposed to CuONPs, giving rise to an increase of light absorption and a suppression of fluorescence emission. Fourier transform infrared spectroscopy (FTIR) results showed that C-PC structures might be altered by the nanoparticles, also revealed that CuONPs preferably interacts with -NH functional groups. The data also revealed that CuONPs affected the chlorophyll a content in duckweed leaves. In addition, photosystem II (PSII) performance was significantly affected by CuONPs, negatively impacting the PSII photochemical network. In summary, the results point out that, even eco-friendly designed, CuONPs may negatively affect the photosynthetic process when accumulated by aquatic photoautotrophs.
Collapse
Affiliation(s)
- Montcharles S Pontes
- Natural Resources Program, Center for Natural Resources Studies (CERNA), Mato Grosso do Sul State University (UEMS), Dourados, Mato Grosso do Sul, 79804-970, Brazil
| | - Daniela E Graciano
- Applied Optics Group, Faculty of Science and Technology, Federal University of Grande Dourados (UFGD), Dourados, Mato Grosso do Sul, 79804-970, Brazil
| | - Débora R Antunes
- Department of Physics and Chemistry, School of Engineering, São Paulo State University (UNESP), Ilha Solteira, São Paulo, 15385-000, Brazil
| | - Jaqueline S Santos
- Natural Resources Program, Center for Natural Resources Studies (CERNA), Mato Grosso do Sul State University (UEMS), Dourados, Mato Grosso do Sul, 79804-970, Brazil
| | - Gilberto J Arruda
- Natural Resources Program, Center for Natural Resources Studies (CERNA), Mato Grosso do Sul State University (UEMS), Dourados, Mato Grosso do Sul, 79804-970, Brazil
| | - Eriton R Botero
- Applied Optics Group, Faculty of Science and Technology, Federal University of Grande Dourados (UFGD), Dourados, Mato Grosso do Sul, 79804-970, Brazil
| | - Renato Grillo
- Department of Physics and Chemistry, School of Engineering, São Paulo State University (UNESP), Ilha Solteira, São Paulo, 15385-000, Brazil
| | - Sandro M Lima
- Natural Resources Program, Center for Natural Resources Studies (CERNA), Mato Grosso do Sul State University (UEMS), Dourados, Mato Grosso do Sul, 79804-970, Brazil
| | - Luís H C Andrade
- Natural Resources Program, Center for Natural Resources Studies (CERNA), Mato Grosso do Sul State University (UEMS), Dourados, Mato Grosso do Sul, 79804-970, Brazil
| | - Anderson R L Caires
- Optics and Photonics Group, Institute of Physics, Federal University of Mato Grosso do Sul (UFMS), Campo Grande, Mato Grosso do Sul, 79070-900, Brazil; School of Life Science, University of Essex, Colchester, CO4 3SQ, Essex, UK
| | - Etenaldo F Santiago
- Natural Resources Program, Center for Natural Resources Studies (CERNA), Mato Grosso do Sul State University (UEMS), Dourados, Mato Grosso do Sul, 79804-970, Brazil.
| |
Collapse
|
5
|
Effects of gold nanoparticles on photophysical behaviour of chlorophyll and pheophytin. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112252] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
6
|
Kavery E, Nagarajan N, Paramaguru G, Renganathan R. Synthesis, characterization and binding interactions of amino acids coupled perylene diimides with colloidal doped and undoped TiO₂. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 146:13-23. [PMID: 25804509 DOI: 10.1016/j.saa.2015.03.062] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 02/04/2015] [Accepted: 03/02/2015] [Indexed: 06/04/2023]
Abstract
Two sensitizers based on amino acids coupled with perylene moiety having absorption in the visible region have been designed and their interaction with doped and undoped TiO2 for the application of dye sensitized solar cells (DSSCs) has been studied. The synthesized compounds PDI-PA and PDI-AA were characterized using (1)H and (13)C NMR, Mass and FT-IR spectroscopic techniques. The optical properties and lifetime measurements of the sensitizers were analyzed using various solvents with different polarity. The solvatochromism effect was studied using Lippert-Mataga plot. The electrochemical studies of both dyes were investigated in DMF with various scan rate ranging from 200 to 1000 mV s(-1). Colloidal doped and undoped TiO2 was prepared and characterized by using absorption measurements. Binding ability of the sensitizers with the nanoparticles was studied through absorption, fluorescence quenching, cyclic voltammetry and FT-IR measurements. Results obtained from all the above analysis suggest the mode of quenching may be static. The binding constant values were calculated using Kamat-Fox equation indicates the binding behavior of the sensitizers with the nanoparticles. The fluorescence quenching was mainly attributed to electron transfer from the excited state of PDI's to the conduction band of colloidal semiconductors. The electron transfer mechanism was explained based on the Rehm-Weller equation as well as the energy level diagram.
Collapse
Affiliation(s)
- E Kavery
- School of Chemistry, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India
| | - N Nagarajan
- School of Chemistry, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India
| | - G Paramaguru
- School of Chemistry, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India
| | - R Renganathan
- School of Chemistry, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India
| |
Collapse
|
7
|
Karunakaran C, Jayabharathi J, Sathishkumar R, Jayamoorthy K, Vimal K. Contrasting emission behaviour of phenanthroimidazole with ZnO nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 115:488-492. [PMID: 23871976 DOI: 10.1016/j.saa.2013.06.073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 05/10/2013] [Accepted: 06/20/2013] [Indexed: 06/02/2023]
Abstract
A new fluorophore 2-(4-fluorophenyl)-1-phenyl-1H-phenanthro [9,10-d]imidazole has been synthesized and characterized by spectroscopic techniques. Nanoparticulate ZnO enhances the fluorescence of the synthesised fluorophore. The absorption, fluorescence, lifetime, cyclic voltammetry and infrared studies reveal that fluorophore is attached to the surface of ZnO semiconductor. Photo-induced electron transfer (PET) explains the enhancement of fluorescence by nanoparticulate ZnO and the apparent binding constant has been obtained. Adsorption of the fluorophore on ZnO nanoparticle lowers the HOMO and LUMO energy levels of the fluorophore. The strong adsorption of the phenanthrimidazole derivative on the surface of ZnO nanocrystals is likely due to the chemical affinity of the nitrogen atom of the organic molecule to the zinc ion on the surface of nanocrystal.
Collapse
Affiliation(s)
- C Karunakaran
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India
| | | | | | | | | |
Collapse
|
8
|
Karunakaran C, Jayabharathi J, Jayamoorthy K. Benzimidazole derivative vs. different phases of TiO2-physico-chemical approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 114:303-308. [PMID: 23778170 DOI: 10.1016/j.saa.2013.05.082] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 05/17/2013] [Accepted: 05/23/2013] [Indexed: 06/02/2023]
Abstract
1-Benzyl-2-phenyl-1H-benzo[d]imidazole (BPBI) has been synthesized by simple steps and characterized by spectral studies. Absorption and fluorescence spectral studies have been employed to investigate the interaction of BPBI with the anatase, hombikat, P25 and rutile phases of TiO2. The emission of the BPBI is efficiently quenched by anatase, hombikat and P25 TiO2 nanoparticles owing to charge injection from the excited singlet state of BPBI to the conduction band of the TiO2 nanoparticles. Surprisingly, rutile phase enhances the fluorescence which is likely due to lowering of LUMO and HOMO levels of the ligand on ducking of the benzimidazole moiety of the BPBI molecule into the void space of rutile TiO2. Electron injection from photoexcited BPBI to the TiO2 conduction band (S*→S(+)+e(-)(CB)) is likely to enhance the fluorescence.
Collapse
Affiliation(s)
- C Karunakaran
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamilnadu, India
| | | | | |
Collapse
|
9
|
Lü XF, Sun WJ, Li J, Xu WX, Zhang FX. Spectroscopic investigations on the simulated solar light induced photodegradation of 4-nitrophenol by using three novel copper(II) porphyrin-TiO2 photocatalysts. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 111:161-8. [PMID: 23624210 DOI: 10.1016/j.saa.2013.02.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Revised: 02/05/2013] [Accepted: 02/06/2013] [Indexed: 05/14/2023]
Abstract
Three porphyrins containing different functional groups (-OH, C-O2C2H5, -COOH), 5-(4-hydroxy) phenyl-10,15,20-triphenyl porphyrin (1a), 5-(4-ethylacetatatomethoxy) phenyl-10,15,20-triphenyl porphyrin (1b), 5-(4-carboxylatomethoxy) phenyl-10,15,20-triphenyl porphyrin (1c), were synthesized and characterized spectroscopically. The CuPp(2a, 2b, 2c)-TiO2 photocatalysts were then prepared and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis-DRS), Fourier-transform infrared spectroscopy (FT-IR). The photocatalytic activities of the photocatalysts were investigated by carrying out the photodegradation of 4-nitrophenol in aqueous solution under simulated solar irradiation. It was found that the CuPp(2a, 2b, 2c)-TiO2 enhanced the photocatalytic efficiency of bare TiO2 in photodegrading the 4-NP due to the interaction between CuPp(2a, 2b, 2c) and TiO2, resulted in the enhancement of the photogenerated electron-hole separation. The reasons of this enhanced photocatalytic activity were also discussed. Based on the present study, it could be considered as a promising photocatalyst for the further industrial application.
Collapse
Affiliation(s)
- Xiang-fei Lü
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi 710069, People's Republic of China
| | | | | | | | | |
Collapse
|
10
|
Karunakaran C, Jayabharathi J, Venkatesh Perumal M, Thanikachalam V, Kumar Thakur P. Electronic properties of phenanthrimidazoles as hole transport materials in organic light emitting devices and in photoelectron transfer to ZnO nanoparticles. J PHYS ORG CHEM 2013. [DOI: 10.1002/poc.3100] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | | | - Prasoon Kumar Thakur
- Division of Nematology; Indian Agricultural Research Institute; New Delhi-12; India
| |
Collapse
|
11
|
Hernández LI, Godin R, Bergkamp JJ, Llansola Portolés MJ, Sherman BD, Tomlin J, Kodis G, Méndez-Hernández DD, Bertolotti S, Chesta CA, Mariño-Ochoa E, Moore AL, Moore TA, Cosa G, Palacios RE. Spectral Characteristics and Photosensitization of TiO2 Nanoparticles in Reverse Micelles by Perylenes. J Phys Chem B 2012. [DOI: 10.1021/jp3086792] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Laura I. Hernández
- Departamento de Química,
Facultad de Ciencias Exactas Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río
Cuarto, Córdoba 5800, Argentina
| | - Robert Godin
- Department of Chemistry and
Center for Self Assembled Chemical Structures (CSACS/CRMAA), McGill University, Otto Maass Chemistry Building, 801
Sherbrooke Street West, Montreal, QC, H3A 0B8, Canada
| | - Jesse J. Bergkamp
- Department of Chemistry and Biochemistry,
Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Manuel J. Llansola Portolés
- Department of Chemistry and Biochemistry,
Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Benjamin D. Sherman
- Department of Chemistry and Biochemistry,
Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - John Tomlin
- Department of Chemistry and Biochemistry,
Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Gerdenis Kodis
- Department of Chemistry and Biochemistry,
Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Dalvin D. Méndez-Hernández
- Department of Chemistry and Biochemistry,
Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Sonia Bertolotti
- Departamento de Química,
Facultad de Ciencias Exactas Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río
Cuarto, Córdoba 5800, Argentina
| | - Carlos A. Chesta
- Departamento de Química,
Facultad de Ciencias Exactas Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río
Cuarto, Córdoba 5800, Argentina
| | - Ernesto Mariño-Ochoa
- Department of Chemistry, Tecnológico de Monterrey, Campus Monterrey,
Monterrey, NL, 64849, México
| | - Ana L. Moore
- Department of Chemistry and Biochemistry,
Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Thomas A. Moore
- Department of Chemistry and Biochemistry,
Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Gonzalo Cosa
- Department of Chemistry and
Center for Self Assembled Chemical Structures (CSACS/CRMAA), McGill University, Otto Maass Chemistry Building, 801
Sherbrooke Street West, Montreal, QC, H3A 0B8, Canada
| | - Rodrigo E. Palacios
- Departamento de Química,
Facultad de Ciencias Exactas Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río
Cuarto, Córdoba 5800, Argentina
| |
Collapse
|
12
|
Inhibition of fluorescence enhancement of benzimidazole derivative on doping ZnO with Cu and Ag. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2012.08.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
13
|
Mesgari Z, Gharagozlou M, Khosravi A, Gharanjig K. Spectrophotometric studies of visible light induced photocatalytic degradation of methyl orange using phthalocyanine-modified Fe-doped TiO2 nanocrystals. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 92:148-153. [PMID: 22446761 DOI: 10.1016/j.saa.2012.02.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 02/08/2012] [Accepted: 02/10/2012] [Indexed: 05/31/2023]
Abstract
In this paper, preparation and visible light induced photocatalytic activity of phthalocyanine-modified Fe-doped TiO(2) nanocrystals (Pc/Fe-TiO(2)) with different Fe doping content (0, 0.05, 0.5 and 3.0 mol% Fe) as photocatalysts for the degradation of methyl orange have been reported. The study carried out using XRD, FT-IR, EDX, BET, DRS, UV-Vis, SEM and TEM techniques. Results revealed that modified TiO(2) nanocrystals possessed only the anatase phase with crystal sizes of about 10-23 nm and high surface areas of 2.8-37.3 m(2)/g. It can be seen phthalocyanine and Fe(3+) ion exist in photocatalysts based on analysis of FT-IR and EDX. The doping amount of Fe remarkably affects the activity of modified TiO(2) nanocrystals as catalysts. The 0.5 mol% Fe doping exhibited enhanced photocatalytic activity in this work. It was found that phthalocyanine and Fe induced a shift in the energy band gap to lower energies, which changes from 3.26 to 2.26 eV for pure TiO(2) and Pc/3% Fe-TiO(2) nanocrystals, respectively. Results of the degradation of methyl orange revealed that modified TiO(2) nanocrystals showed much more photocatalytic activity than pure TiO(2) under visible light which makes the applicability of TiO(2) photocatalysts even more versatile.
Collapse
Affiliation(s)
- Zohreh Mesgari
- Department of Chemistry, Amirkabir University of Technology, Tehran, Iran
| | | | | | | |
Collapse
|
14
|
Photosensitization of Imidazole Derivative by ZnO Nanoparticle. J Fluoresc 2012; 22:1047-53. [DOI: 10.1007/s10895-012-1042-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Accepted: 03/07/2012] [Indexed: 11/27/2022]
|
15
|
Electron transfer dynamics from the singlet and triplet excited states of meso-tetrakis(p-carboxyphenyl)porphyrin into colloidal TiO2 and AuTiO2 nanoparticles. J Colloid Interface Sci 2010; 348:642-8. [DOI: 10.1016/j.jcis.2010.05.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 04/25/2010] [Accepted: 05/03/2010] [Indexed: 11/20/2022]
|