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Jayabharathi J, Arunpandiyan A, Thanikachalam V, Ramanathan P. Photoinduced Electron Transfer from Phenanthrimidazole to Magnetic Nanoparticles. J Fluoresc 2015; 25:137-45. [DOI: 10.1007/s10895-014-1490-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 12/02/2014] [Indexed: 10/24/2022]
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Liang W, Liu S, Liu Z, Li D, Wang L, Hao C, He Y. Electron transfer and fluorescence “turn-off” based CdTe quantum dots for vancomycin detection at nanogram level in aqueous serum media. NEW J CHEM 2015. [DOI: 10.1039/c4nj01764a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mode of interaction of GSH-CdTe QDs with vancomycin and the mechanism of the fluorescence “turn-off” process.
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Affiliation(s)
- Wanjun Liang
- Key Laboratory on Luminescence & Real-Time Analysis
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Shaopu Liu
- Key Laboratory on Luminescence & Real-Time Analysis
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Zhengqing Liu
- Frontier Institute of Chemistry
- Frontier Institute of Science and Technology jointly with College of Science
- Xi'an Jiaotong University
- Xi'an 710054
- P. R. China
| | - Dan Li
- Key Laboratory on Luminescence & Real-Time Analysis
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Linlin Wang
- Key Laboratory on Luminescence & Real-Time Analysis
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Chenxia Hao
- Key Laboratory on Luminescence & Real-Time Analysis
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Youqiu He
- Key Laboratory on Luminescence & Real-Time Analysis
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
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4
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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.
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Affiliation(s)
- C Karunakaran
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India
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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.
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Affiliation(s)
- C Karunakaran
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamilnadu, India
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6
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Karunakaran C, Jayabharathi J, Jayamoorthy K. Fluorescence quenching of organic molecule by insulator. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 112:417-421. [PMID: 23707997 DOI: 10.1016/j.saa.2013.04.093] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 04/12/2013] [Accepted: 04/24/2013] [Indexed: 06/02/2023]
Abstract
A new kind of fluorophore 2-(4-fluorophenyl)-1-phenyl-1H-benzo[d]imidazole (FPPBI) has been synthesized and characterized by (1)H NMR, (13)C NMR, mass spectral studies and single crystal XRD. The energy transfer from FPPBI to Al2O3 nanocrystals has been studied by absorption, fluorescence and lifetime spectroscopic methods. The association between nanoparticles and FPPBI is explained from both absorption and fluorescence quenching data. The distance between FPPBI and Al2O3 as well as the critical energy transfer distance has been deduced.
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Affiliation(s)
- C Karunakaran
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamilnadu, India
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7
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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
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8
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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
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Zhou Q, Zhang H, Wang Y, Zhou X. Studies on the interaction of interface between morin and TiO2. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 72:110-114. [PMID: 18842451 DOI: 10.1016/j.saa.2008.08.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2008] [Revised: 08/22/2008] [Accepted: 08/22/2008] [Indexed: 05/26/2023]
Abstract
For the first time, the interaction between morin and TiO(2) nanoparticles was investigated by UV-vis absorption, UV-vis diffuse reflectance spectrum, FT-IR, fluorescence, and three-dimensional fluorescence spectra techniques. The results showed that chemical bonds had formed between the surface atoms of TiO(2) nanoparticles and morin molecules. The fluorescence intensity of TiO(2)-morin nanocomposites was much higher than that of morin particles. In addition, the effect of TiO(2) concentrations on the fluorescence intensity of morin was also investigated.
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Affiliation(s)
- Qiuhua Zhou
- Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City, Jiangsu Province 224002, People's Republic of China
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Kathiravan A, Renganathan R. Effect of anchoring group on the photosensitization of colloidal TiO2 nanoparticles with porphyrins. J Colloid Interface Sci 2008; 331:401-7. [PMID: 19100559 DOI: 10.1016/j.jcis.2008.12.001] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2008] [Revised: 11/07/2008] [Accepted: 12/01/2008] [Indexed: 10/21/2022]
Abstract
The interaction of porphyrins (TCPP, TSPP, TMeOPP and TPP) with colloidal TiO(2) nanoparticles was studied by infra-red, UV-visible absorption, steady state and time resolved fluorescence spectroscopy. The porphyrins (TCPP, TSPP and TMeOPP) adsorbed on the surface of colloidal TiO(2) nanoparticles through electrostatic interaction. According to absorption and fluorescence changes the apparent association constants (K(app)) were calculated. However, TPP did not interact with surface of colloidal TiO(2) nanoparticles due to the absence of anchoring group. The fluorescence quenching is attributable mainly to electron transfer from the excited state porphyrins to the conduction band of colloidal TiO(2). The rate of electron transfer process (k(et)) was calculated using lifetime measurement. The electron transfer mechanism has been proved by the calculation of free energy change (DeltaG(et)) by applying Rehm-Weller equation. Using all the spectroscopic measurements we confirmed that the presence of anchoring group plays major role in the adsorption as well as the electron transfer processes.
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Affiliation(s)
- A Kathiravan
- School of Chemistry, Bharathidasan University, Tiruchirappalli-620 024, Tamil Nadu, India
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