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Nagaraj K, Karuppiah C, Wadaan MA, Maity P, Kaliyaperumal R, Vaishnavi E, Rajaraman D, Abhijith SM, Ramaraj SK, Mathivanan I. Synthesis, characterization, molecular modeling, binding energies of β-cyclodextrin-inclusion complexes of quercetin: Modification of photo physical behavior upon β-CD complexation. Spectrochim Acta A Mol Biomol Spectrosc 2024; 313:124091. [PMID: 38447439 DOI: 10.1016/j.saa.2024.124091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 02/22/2024] [Accepted: 02/26/2024] [Indexed: 03/08/2024]
Abstract
We prepared a naturally occurring flavanoid namely quercetin from tea leaves and analyzed by Absorption, Emission, FT-IR, 1H, 13C nmr spectra and ESI-MS analysis. The inclusion behavior of quercetin in cyclodextrins like α-, β-, γ-, per-6-ABCD and mono-6-ABCD cavities were supported such as UV-vis., Emission, FT-IR and ICD spectra and energy minimization studies. From the absorption and emission results, the type of complexes formed were found to depend on stoichiometry of Host:Guest. FT-IR data of CD complexes of quercetin supported inclusion complex formation of the substrate with α-, β- and γ-CDs. The inclusion of host-guest complexation of quercetin with α-, β-, γ-CDs, per-6-ABCD and mono-6-ABCDs provides very valuable information about the CD:quercetin complexes, the study also shows that β-CD complexation improves water solubility, chemical stability and bioavailability of quercetin. Besides, phase solubility studies also supported the formation of 1:1 drug-CD soluble complexes. All these spectral results provide insight into the binding behavior of substrate into CD cavity in the order per-6-ABCD > Mono-6-ABCD > γ-CD > β-CD > α-CD. The proposed model also finds strong support from the fact with excess CD this exciton coupling disappears indicates the formation of only 1:1 complex.
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Affiliation(s)
- Karuppiah Nagaraj
- School of Pharmacy, National Forensic Sciences University, 6M56+XP8, Police Bhavan Rd, Sector 9, Gandhinagar, Gujarat 382007, India.
| | - Chelladurai Karuppiah
- Battery Research Center for Green Energy, Ming Chi University of Technology, New Taipei City 24301, Taiwan; PG & Research Department of Chemistry, Thiagarajar College, Madurai, Tamil Nadu, India
| | - Mohammad Ahmad Wadaan
- Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Prasenjit Maity
- School of Engineering and Technology, National Forensic Sciences University, 6M56+XP8, Police Bhavan Rd, Sector 9, Gandhinagar, Gujarat 382007, India
| | - Raja Kaliyaperumal
- Department of Chemistry, St. Joseph University, Chumoukedima, Nagaland 797115, India
| | - Ellappan Vaishnavi
- Department of Chemistry, Sri GVG Visalakshi College for Women, Udumalpet 642128, Tamil Nadu, India
| | - D Rajaraman
- Humanities and Sciences, St. Peters Engineering College, St Peters College Rd, Opposite TS Forest Academy Dullapally, Maisammaguda, Medchal, Hyderabad, Telangana 500043, India
| | - S M Abhijith
- School of Pharmacy, National Forensic Sciences University, 6M56+XP8, Police Bhavan Rd, Sector 9, Gandhinagar, Gujarat 382007, India
| | - Sayee Kannan Ramaraj
- PG & Research Department of Chemistry, Thiagarajar College, Madurai, Tamil Nadu, India
| | - Isai Mathivanan
- Research Department of Zoology, Seethalakshmi Ramaswami College (Autonomous), Affiliated to Bharathidasan University, Tiruchirapalli, Tamil Nadu, India
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Nagaraj K, Priyanshi J, Govindasamy C, Sivakumar AS, Kamalesu S, Naman J, Dixitkumar M, Lokhandwala S, Parekh NM, Radha S, Uthra C, Vaishnavi E, Sakthinathan S, Chiu TW, Karuppiah C. Effect of hydrophobicity and size of the ligands on the intercalative binding interactions of some metallo-surfactants containing π-conjugated systems with yeast tRNA. J Biomol Struct Dyn 2024; 42:3949-3957. [PMID: 37254288 DOI: 10.1080/07391102.2023.2216783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 05/16/2023] [Indexed: 06/01/2023]
Abstract
The intercalative yeast t-RNA binding behavior of some metallo-surfactant complexes, Co(ip)2(TA)2](ClO4)3 (1) and [Co(dpq)2(TA)2](ClO4)3 (2) where TA = Tetradecylamine (Myristylamine), ip = imidazo[4,5-f][1,10]phenanthroline and dpq = dipyrido[3,2-d:2'-3'-f]quinoxaline containing π-conjugated systems (both below and above critical micelle concentration) have been investigated by means of absorption spectral titration, competitive binding, circular dichroism, cyclic voltammetry, and viscometry measurements. Absorption spectral titration results implicate yeast tRNA has significant effects on the binding behaviors of two surfactant complexes via intercalative mode showed a significant absorption band of hypochromicity with red shift. The intrinsic binding constant values below and above CMC were determined as Kb = 6.12 × 105 M-1, 2.31 × 106 M-1, for complex (1) and 7.23 × 105 M-1, 3.57 × 106 M-1, for complex (2). In both sets of complexes (1) and (2), the complexes bind more strongly to yeast tRNA in the above critical micelle concentration can be hydrophobic and confirm intercalation. Competitive displacement studies confirmed that complexes bind to yeast tRNA via intercalative mode. Cyclic voltammetry studies suggest the increasing amounts of yeast tRNA, the cathodic potential Epc for the two complexes shows a positive shift in peak potential indicated the process of binding via intercalation. These observations were further validated by CD, and hydrodynamic measurements. All these studies suggesting that a surfactant complex binds to yeast tRNA appear to be mainly intercalative because of hydrophobicity due to extending aromaticity of the π system of the ligand and planarity of the complex has a significant effect on tRNA binding affinity increasing in the order of complexes containing ligands ip < dpq.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Karuppiah Nagaraj
- SRICT-Institute of Science and Research, Department of Chemistry, UPL University of Sustainable Technology, Vataria, India
| | - Jigeshkumar Priyanshi
- SRICT-Institute of Science and Research, Department of Chemistry, UPL University of Sustainable Technology, Vataria, India
| | - Chandramohan Govindasamy
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Allur Subramaniyan Sivakumar
- Department of Orthopaedic Surgery, Dongtan Sacred Heart Hospital, Hallym University, College of Medicine, Hwaseong, Republic of Korea
| | - Supramanium Kamalesu
- Department of Chemistry, University of Science, Chandigarh University, Gharuan, India
| | - Jitendrabhai Naman
- SRICT-Institute of Science and Research, Department of Chemistry, UPL University of Sustainable Technology, Vataria, India
| | - Manojkumar Dixitkumar
- SRICT-Institute of Science and Research, Department of Chemistry, UPL University of Sustainable Technology, Vataria, India
| | - Snehal Lokhandwala
- Department of Environmental Science & Technology, UPL University of Sustainable Technology, Vataria, India
| | - Nikhil M Parekh
- SRICT-Institute of Science and Research, Department of Chemistry, UPL University of Sustainable Technology, Vataria, India
| | - Suriyan Radha
- Department of Chemistry, Saiva Bhanu Kshatriya College, Aruppukkottai, India
| | - Chandrabose Uthra
- Department of Microbiology, Bharathidasan University, Tiruchirapalli, India
| | - Ellappan Vaishnavi
- Department of Chemistry, Sri GVG Visalakshi College for Women, Udumalpet, India
| | - Subramanian Sakthinathan
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan, ROC
| | - Te-Wei Chiu
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan, ROC
| | - Chelladurai Karuppiah
- Battery Research Center for Green Energy, Ming Chi University of Technology, New Taipei City, Taiwan, ROC
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Kalaivani P, Prabhakaran R, Dallemer F, Vaishnavi E, Poornima P, Vijaya Padma V, Renganathan R, Natarajan K. Synthesis, structural characterization, DNA/Protein binding and in vitro cytotoxicity of isomeric ruthenium carbonyl complexes. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.04.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kalaivani P, Prabhakaran R, Vaishnavi E, Rueffer T, Lang H, Poornima P, Renganathan R, Vijaya Padma V, Natarajan K. Synthesis, structure, DNA/protein binding and in vitro cytotoxicity of new ruthenium metallates. Inorg Chem Front 2014. [DOI: 10.1039/c3qi00070b] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Vaishnavi E, Renganathan R. CdTe quantum dot as a fluorescence probe for vitamin B(12) in dosage form. Spectrochim Acta A Mol Biomol Spectrosc 2013; 115:603-609. [PMID: 23872019 DOI: 10.1016/j.saa.2013.06.068] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 06/12/2013] [Accepted: 06/19/2013] [Indexed: 06/02/2023]
Abstract
We here report the CdTe quantum dot (CdTe QDs)-based sensor for probing vitamin B12 derivatives in aqueous solution. In this paper, simple and sensitive fluorescence quenching measurements has been employed. The Stern-Volmer constant (KSV), quenching rate constant (kq) and binding constant (K) were rationalized from fluorescence quenching measurement. Furthermore, the fluorescence resonance energy transfer (FRET) mechanism was discussed. This method was applicable over the concentration ranging from 1 to 14μg/mL (VB12) with correlation coefficient of 0.993. The limit of detection (LOD) of VB12 was found to be 0.15μg/mL. Moreover, the present approach opens a simple pathway for developing cost-effective, sensitive and selective QD-based fluorescence sensors/probes for biologically significant VB12 in pharmaceutical sample with mean recoveries in the range of 100-102.1%.
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Affiliation(s)
- E Vaishnavi
- School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India
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Abstract
In this article, we describe a new platform for probing double stranded DNA (dsDNA) by tracing the "on-off-on" fluorescence signals of quantum dots-cationic porphyrin utilizing fluorescence and synchronous fluorescence measurements. Electrostatic interaction between the negatively charged thioglycolic acid capped CdTe quantum dots (CdTe-TGA QDs) and positively charged porphyrin surfaces leads to drastic quenching (turning off) of the donor by an effective electron transfer process. Interestingly, after the addition of calf thymus DNA (CtDNA), the porphyrins peel off from the quantum dot surface and bind to dsDNA, resulting in the restoration of fluorescence intensity of quantum dots (turning on). Consequently, this can be utilized for the selective sensing of dsDNA via optical responses. Experimental results show that the increase in fluorescence intensity is proportional to the concentration of CtDNA within the range of 6.5 × 10(-9) M to 29.6 × 10(-8) M under the optimized experimental conditions. Furthermore, the peel off mechanism was confirmed by atomic force measurement.
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Affiliation(s)
- Ellappan Vaishnavi
- School of Chemistry, Bharathidasan University, Tiruchirappalli-620 024, Tamil Nadu, India.
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Dheeba B, Vaishnavi E, Sampathkumar P, Kannan M. Hepatoprotective and Curative Effect of Eclipta prostrata on CCl4 Induced Hepatotoxicity in Albino Rats. ACTA ACUST UNITED AC 2012. [DOI: 10.13005/bbra/1001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Dheeba B, Sampathkumar P, Kannan M, Vaishnavi E, Maragatham M. Therapeutic Efficacy of Spirulina In the Treatment of Formaldehyde Induced Rheumatoid Arthritis in Swiss Albino Mice. ACTA ACUST UNITED AC 2012. [DOI: 10.13005/bbra/1003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kalaivani P, Prabhakaran R, Dallemer F, Poornima P, Vaishnavi E, Ramachandran E, Padma VV, Renganathan R, Natarajan K. DNA, protein binding, cytotoxicity, cellular uptake and antibacterial activities of new palladium(ii) complexes of thiosemicarbazone ligands: effects of substitution on biological activity. Metallomics 2012; 4:101-13. [DOI: 10.1039/c1mt00144b] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jhonsi MA, Vaishnavi E, Suganya R, Kathiravan A, Renganathan R. Investigation on the Photoinduced Interaction Between Water Soluble CdTe Quantum Dots and Certain Antioxidants. ACTA ACUST UNITED AC 2011. [DOI: 10.1166/asl.2011.1895] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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