1
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Kaur J, Mirgane HA, Patil VS, Ahlawat GM, Bhosale SV, Singh PK. Expanding the scope of self-assembled supramolecular biosensors: a highly selective and sensitive enzyme-responsive AIE-based fluorescent biosensor for trypsin detection and inhibitor screening. J Mater Chem B 2024; 12:3786-3796. [PMID: 38546335 DOI: 10.1039/d4tb00264d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
Trypsin, a pancreatic enzyme associated with diseases like pancreatic cancer and cystic fibrosis, requires effective diagnostic tools. Current detection systems seldom utilize macrocyclic molecules and tetraphenyl ethylene (TPE) derivative-based supramolecular assemblies, known for their biocompatibility and aggregation-induced emission (AIE) properties, for trypsin detection. This study presents an enzyme-responsive, AIE-based fluorescence 'Turn-On' sensing platform for trypsin detection, employing sulfated-β-cyclodextrin (S-βCD), an imidazolium derivative of TPE (TPE-IM), and protamine sulfate (PrS). The anionic S-βCD and cationic TPE-IM formed a strongly fluorescent supramolecular aggregation complex in an aqueous buffer. However, PrS suppresses fluorescence because of its strong binding affinity with S-βCD. The non-fluorescent TPE-IM/S-βCD/PrS supramolecular assembly system exhibits trypsin-responsive properties, as PrS is a known trypsin substrate. Trypsin restores fluorescence in the TPE-IM/S-βCD system through the enzymatic cleavage of PrS, correlating linearly with trypsin catalytic activity in the 0-10 nM concentration range. The limit of detection is 10 pM. This work contributes to the development of self-assembled supramolecular biosensors using charged TPE derivatives and β-cyclodextrin-based host-guest chemistry, offering an innovative fluorescence 'Turn-On' trypsin sensing platform. The sensing system is highly stable under various conditions, selective for trypsin, and demonstrates potential for biological analysis and disease diagnosis in human serum. Additionally, it shows promise for the screening of trypsin inhibitors.
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Affiliation(s)
- Jasvir Kaur
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
- University Institute of Biotechnology, Chandigarh University, Panjab 140 413, India
| | - Harshad A Mirgane
- Department of Chemistry, School of Chemical Sciences, Central University of Karnataka, Kalaburagi 585367, Karnataka, India
| | - Vrushali S Patil
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
- School of Nanoscience & Technology, Shivaji University Kolhapur, Vidya Nagar, Kolhapur 416004, Maharashtra, India
| | - Geetika M Ahlawat
- University Institute of Biotechnology, Chandigarh University, Panjab 140 413, India
| | - Sheshanath V Bhosale
- Department of Chemistry, School of Chemical Sciences, Central University of Karnataka, Kalaburagi 585367, Karnataka, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400085, India
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2
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Balan GA, Precupas A, Matei I. Gelation Behaviour of Pluronic F127/Polysaccharide Systems Revealed via Thioflavin T Fluorescence. Gels 2023; 9:939. [PMID: 38131925 PMCID: PMC10742936 DOI: 10.3390/gels9120939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023] Open
Abstract
Fast, reliable methods for characterizing the micelle-to-gel transition in emerging Pluronic F127/polysaccharide materials are essential for tailoring their applications as in situ gelling delivery systems. This study describes a simple fluorimetric method based on the response to gelation of the molecular probe thioflavin T (ThT). The techniques employed are (second derivative) steady-state and synchronous fluorescence. The capabilities of ThT as gelation reporter are tested for three model systems: Pluronic F127 (P16.6%), Pluronic F127/alginate (P16.6%ALG2%) and Pluronic F127/hyaluronic acid (P16.6%HA0.5%). We demonstrate that the changes in the short and long wavelength emissions of ThT allow accurate determination of the critical gelation temperatures in the investigated systems. The spectroscopic data providing information at molecular level are complemented with differential scanning microcalorimetric results revealing additional macroscopic insight into the micellization process. The gelation study is preceded by a solvatochromic analysis of ThT.
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Affiliation(s)
| | | | - Iulia Matei
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
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3
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Bais S, Singh PK. Al 3+-Responsive Ratiometric Fluorescent Sensor for Creatinine Detection: Thioflavin-T and Sulfated-β-Cyclodextrin Synergy. ACS APPLIED BIO MATERIALS 2023; 6:4146-4157. [PMID: 37702182 DOI: 10.1021/acsabm.3c00349] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
Kidney disorders are a rising global health issue, necessitating early diagnosis for effective treatment. Creatinine, a metabolic waste product from muscles, serves as an ideal biomarker for kidney damage. The existing optical methods for creatinine detection often involve labor-intensive synthesis processes and present challenges with the aqueous solubility and sensitivity to experimental variations. In this study, we introduce a straightforward fluorescence "turn-on" ratiometric sensor system for creatinine detection in aqueous media with a limit of detection of 0.5 μM. The sensor is based on sulfated-β-cyclodextrin (SCD)-templated H-aggregate of a commercially available, ultrafast rotor dye thioflavin-T (ThT). The Al3+ ion-induced dissociation of ThT-SCD aggregates, followed by reassociation upon creatinine addition, generates a detectable signal. The modulation of monomer/aggregate equilibrium due to the disassembly/reassembly of the ThT-SCD system under Al3+/creatinine influence serves as the optimal strategy for ratiometric creatinine detection in aqueous media. Our sensor framework offers several advantages: utilization of the readily available dye ThT, which eliminates the need for a laborious synthesis of custom fluorescent probes; ratiometric sensing, which improves quantitative analysis accuracy; and compatibility with complex aqueous media. The sensor's practical utility has been successfully demonstrated in artificial urine samples. In summary, our sensor system represents a significant advancement in the rapid, selective, and sensitive detection of the clinically crucial bioanalyte creatinine, offering potential benefits for the early diagnosis and management of kidney disorders.
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Affiliation(s)
- Sujata Bais
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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4
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Singh G, Pandey SP, Singh PK. Guest Binding with Sulfated Cyclodextrins: Does the Size of Cavity Matter? Chemphyschem 2023; 24:e202200421. [PMID: 36228089 DOI: 10.1002/cphc.202200421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 10/01/2022] [Indexed: 01/19/2023]
Abstract
Sulfated cyclodextrins have recently emerged as potential candidates for producing host-induced guest aggregation with properties better than p-sulfonatocalixarenes that have previously shown numerous applications involving the phenomena of host-induced guest aggregation. In the class of sulfated cyclodextrins (SCD), sulfated β-cyclodextrin (β-SCD) remains the most extensively investigated host molecule. Although it is assumed that the host-induced guest aggregation is predominantly an outcome of interaction of the guest molecule with the charges on the exterior of SCD cavity, it has not been deciphered whether the variation in the cavity size will make a difference in the efficiency of host-induced guest-aggregation process. In this investigation, we present a systematic study of host-induced guest aggregation of a cationic molecular rotor dye, Thioflavin T (ThT) with three different sulfated cyclodextrin molecules, α-SCD, β-SCD and γ-SCD, which differ in their cavity size, using steady-state emission, ground-state absorption and time-resolved emission measurements. The obtained photophysical properties of ThT, upon interaction with different SCD molecules, indicate that the binding strength of ThT with different SCD molecules correlate with the cavity size of the host molecule, giving rise to the strongest complexation of ThT with the largest host molecule (γ-SCD). The binding affinity of ThT towards different host molecules has been supported by molecular docking calculations. The results obtained are further supported with the temperature and ionic strength dependent studies performed on the host-guest complex. Our results indicate that for host-induced guest aggregation, involving oppositely charged molecules, the size of the cavity also plays a crucial role beside the charge density on the exterior of host cavity.
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Affiliation(s)
- Gaurav Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre Trombay, Mumbai, 400 085, India
| | - Shrishti P Pandey
- Amity Institute of Biotechnology, Amity University, Mumbai-Pune Expressway, Bhatan Panvel, Mumbai, 410206, India.,Department of Biotechnology, Mithibai College of Arts, Chauhan Institute of Science & Amrutben Jivanlal College of Commerce and Economics, Vile Parle (W), 400056, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre Trombay, Mumbai, 400 085, India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400 094, India
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5
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An ultrasensitive and selective method for visual detection of heparin in 100 % human plasma. Talanta 2023. [DOI: 10.1016/j.talanta.2022.124040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Kanti Mal D, Nilaya Jonnalgadda P, Kant Chittela R, Chakraborty G. Utilization of Host Assisted Aggregation-Induced Emission of ANS Dye for ATP Sensing. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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7
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Pandey SP, Desai AM, Singh PK. A molecular rotor based ratiometric detection scheme for aluminium ions in water. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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8
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An aggregation induced emission based simple and sensitive fluorescence ‘Turn-On’ method for monitoring sodium hexa-meta-phosphate, a food preservative. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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pH tolerant metal ion controlled luminescence behaviour of supramolecular assembly and its application in bioimaging and supramolecular logic gate. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Kaur J, Mirgane HA, Bhosale SV, Singh PK. A cationic AIEgen and hexametaphosphate based simple and convenient fluorometric assay for alkaline phosphatase and its inhibitor. Org Biomol Chem 2022; 20:4599-4607. [PMID: 35603784 DOI: 10.1039/d2ob00367h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Alkaline phosphatase (ALP) is an important biomarker to diagnose a number of diseases, such as anaemia, hepatobiliary diseases, chronic nephritis, and hypothyroidism. Therefore, the development of simple and convenient assays to monitor levels of ALP is highly desirable. In the present study, an aggregation-induced emission based simple, real-time, and direct fluorescence detection platform has been developed, by using a tetracationic pyridinium derivative of tetraphenylethylene (TPy-TPE) and anionic sodium hexametaphosphate (HMP) as component units. The sensing system, based on the TPy-TPE-HMP assembly, is highly responsive to the ALP dependent disintegration of the TPy-TPE-HMP aggregation complex, owing to HMP digestion by ALP. The sensing platform has an ALP detection limit of 16 mU mL-1 and linear range of 0-742 mU mL-1, respectively. The enzyme kinetic parameters, Km and Vmax, have been evaluated. In addition, the potential applicability of the TPy-TPE-HMP sensing system has also been shown with diluted human serum samples. Moreover, the TPy-TPE-HMP probe system is also useful for screening inhibitors of ALP.
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Affiliation(s)
- Jasvir Kaur
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - Harshad A Mirgane
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa 403 206, India
| | - Sheshanath V Bhosale
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa 403 206, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400085, India
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11
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Abstract
Multicharged cyclodextrin (CD) supramolecular assemblies, including those based on positively/negatively charged modified mono-6-deoxy-CDs, per-6-deoxy-CDs, and random 2,3,6-deoxy-CDs, as well as parent CDs binding positively/negatively charged guests, have been extensively applied in chemistry, materials science, medicine, biological science, catalysis, and other fields. In this review, we primarily focus on summarizing the recent advances in positively/negatively charged CDs and parent CDs encapsulating positively/negatively charged guests, especially the construction process of supramolecular assemblies and their applications. Compared with uncharged CDs, multicharged CDs display remarkably high antiviral and antibacterial activity as well as efficient protein fibrosis inhibition. Meanwhile, charged CDs can interact with oppositely charged dyes, drugs, polymers, and biomacromolecules to achieve effective encapsulation and aggregation. Consequently, multicharged CD supramolecular assemblies show great advantages in improving drug-delivery efficiency, the luminescence properties of materials, molecular recognition and imaging, and the toughness of supramolecular hydrogels, in addition to enabling the construction of multistimuli-responsive assemblies. These features are anticipated to not only promote the development of CD-based supramolecular chemistry but also contribute to the rapid exploitation of these assemblies in diverse interdisciplinary applications.
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Affiliation(s)
- Zhixue Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China.
| | - Yu Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China. .,Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
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12
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Singh G, Singh VR, Pandey SP, Singh PK. Sulfated-β-cyclodextrin templated aggregation of a metachromatic dye, Basic Orange 21: A photophysical investigation. Supramol Chem 2022. [DOI: 10.1080/10610278.2022.2046277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Gaurav Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Um-dae Centre for Excellence in Basic Sciences, University of Mumbai, Mumbai, India
| | - Vidya R. Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Shrishti P. Pandey
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Amity Institute of Biotechnology, Amity University, Mumbai-Pune Expressway, Mumbai, INDIA
| | - Prabhat K. Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Training School Complex, Mumbai, India
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13
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Highly fluorescent functionalized nano-Poly(Para-phenylene ethynylene) by polymer modification. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Singh VR, Pandey SP, Singh PK. A Unique Supramolecular Assembly between Sulfated Cyclodextrin, Silver and Melamine: Towards a Fluorescence based Dual Wavelength Detection Approach for Melamine. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Kaur J, Nadimetla DN, Bhosale SV, Singh PK. Polyanionic Cyclodextrin-Induced Supramolecular Assembly of a Cationic Tetraphenylethylene Derivative with Aggregation-Induced Emission. J Phys Chem B 2022; 126:1147-1155. [PMID: 35103477 DOI: 10.1021/acs.jpcb.1c09780] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The combination of supramolecular chemistry and aggregation-induced emission-based luminogens (AIEgens) has recently attracted tremendous attention because of its ability to offer large emission enhancement even in substantially dilute solutions. In this work, a new aggregation-induced emission (AIE)-based supramolecular assembly has been reported, which consists of a polyanionic cyclodextrin derivative and a tetracationic tetraphenylethylene (TPE) derivative. Ionic cyclodextrins have attracted significant attention in host-guest supramolecular chemistry and pharmaceutical industry. However, ionic derivatives of β-cyclodextrins have not been explored to establish noncovalent interactions-based aggregation assembly of the most popular class of AIEgens, i.e., tetraphenylethylene derivatives. The current report demonstrates AIE of a tetracationic methyl pyridinium derivative of tetraphenylethylene (TPy-TPE) induced by a polyanionic sulfated β-cyclodextrin (S-βCD). The AIE-based supramolecular assembly has been thoroughly investigated using steady-state fluorescence, ground-state absorbance, and time-resolved fluorescence measurements. Further, the response of the supramolecular assembly towards external stimuli, such as, ionic strength, pH, and temperature, has been investigated. In addition, the complexation behavior of the TPE derivative has also been compared with the native neutral β-cyclodextrin derivative, which delineates the important role of the negatively charged portal of S-βCD in inducing aggregation of the TPy-TPE. The stoichiometry of the complex has been found to be 3:1 for TPy-TPE:S-βCD, using Job's plot analysis. Finally, to get insights into the underlying interactions between the supramolecular assembly components, molecular docking calculations have been performed.
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Affiliation(s)
- Jasvir Kaur
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Dinesh N Nadimetla
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa 403 206, India
| | - Sheshanath V Bhosale
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa 403 206, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.,Homi Bhabha National Institute, Anushaktinagar, Mumbai 400085, India
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16
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Sayed M, Pal H. An overview from simple host-guest systems to progressively complex supramolecular assemblies. Phys Chem Chem Phys 2021; 23:26085-26107. [PMID: 34787121 DOI: 10.1039/d1cp03556h] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Supramolecular chemistry involving macrocyclic hosts is a highly interdisciplinary and fast-growing research field in chemistry, biochemistry, and materials science. Host-guest based supramolecular assemblies, as constructed through non-covalent interactions, are highly dynamic in nature, and can be tuned easily using their responses to various external stimuli, providing a convenient approach to achieve excellent functional materials. Macrocyclic hosts, particularly cyclodextrins, cucurbit[n]urils, and calix[n]arenes, which have unique features like possessing hydrophobic cavities of different sizes, along with hydrophilic external surfaces, which are also amenable towards easy derivatizations, are versatile cavitands or host molecules to encapsulate diverse guest molecules to form stable host-guest complexes with many unique structures and properties. Interestingly, host-guest complexes possessing amphiphilic properties can easily lead to the formation of various advanced supramolecular assemblies, like pseudorotaxanes, rotaxanes, polyrotaxanes, supramolecular polymers, micelles, vesicles, supramolecular nanostructures, and so on. Moreover, these supramolecular assemblies, with varied morphologies and responsiveness towards external stimuli, have immense potential for applications in nanotechnology, materials science, biosensors, drug delivery, analytical chemistry and biomedical sciences. In this perspective, we present a stimulating overview, discussing simple host-guest systems to complex supramolecular assemblies in a systematic manner, aiming to encourage future researchers in this fascinating area of supramolecular chemistry to develop advanced supramolecular materials with superior functionalities, for their deployment in diverse applied areas.
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Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - Haridas Pal
- Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India.,Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
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17
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Chakraborty G, Pillai VS, Chittela RK. Complexation-induced tuning of optical properties of a medically important alkaloid, berberine in the presence of charged cyclodextrin. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113454] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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18
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Pandey SP, Awasthi AA, Singh PK. Supramolecular tuning of thioflavin-T aggregation hosted by polystyrene sulfonate. Phys Chem Chem Phys 2021; 23:14716-14724. [PMID: 34190258 DOI: 10.1039/d1cp02030g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tunable and controllable emission is an extremely desirable feature for advanced functional materials that finds usage in optoelectronic utilization, fluorescence probing/sensing, drug-delivery monitoring, etc. In the present contribution, we have employed a macrocyclic host molecule, sulfobutyl ether-β-cyclodextrin (SBE-β-CD), as a tuning agent for an intensely emissive aggregate assembly of a molecular rotor dye, thioflavin-T (ThT), in the presence of an anionic polyelectrolyte, polystyrene sulfonate (PSS). The macrocyclic host breaks the PSS templated ThT aggregates and leads to encapsulation of released ThT molecules, tailoring the emission response of the system in terms of intensity and wavelength. Utilizing the established selectivity of the cyclodextrin-adamantane system, reverse control of this tunable emission has been further achieved. The controllable fluorescence system has been extensively investigated using ground-state absorption, steady-state and time-resolved emission spectroscopy. This kind of supramolecular tailoring of self-assembled aggregate emission has enormous potential in the field of fluorescence sensors and probes, and imaging and tracking in biological systems.
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Affiliation(s)
- Shrishti P Pandey
- Amity Institute of Biotechnology, Amity University, Mumbai-Pune Expressway, Bhatan, Panvel, Mumbai, 410206, India and Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - Ankur A Awasthi
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India. and Homi Bhabha National Institute, Anushaktinagar, Mumbai-400085, India
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19
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Reddy NR, Aubin M, Kushima A, Fang J. Fluorescent H-Aggregate Vesicles and Tubes of a Cyanine Dye and Their Potential as Light-Harvesting Antennae. J Phys Chem B 2021; 125:7911-7918. [PMID: 34232656 DOI: 10.1021/acs.jpcb.1c04262] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
H-aggregates of π-conjugated dyes are an ordered supramolecular structure. However, the non-fluorescence behavior of H-aggregates greatly limits their potential applications. In this paper, we report the formation of fluorescent H-aggregates with vesicular and tubular morphologies by the self-assembly of 3,3'-diethylthiacarbocyanine iodide (DiSC2(3)) in ammonia/methanol mixtures. The transition from H-aggregate vesicles to H-aggregate tubes can be achieved by increasing the volume fraction of methanol in the mixtures. H-aggregate vesicles and tubes show two blue-shifted absorption bands and strong fluorescence, which result from the inclined arrangement of DiSC2(3) molecules. Furthermore, light-harvesting complexes are formed by adding dopamine (DA)-quinone (acceptor) in synthetic urine with H-aggregate vesicles or tubes. Our results show that H-aggregate tubes are more efficient than H-aggregate vesicles in transferring excited electrons to DA-quinone acceptors.
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Affiliation(s)
- Nitin Ramesh Reddy
- Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida 32816, United States
| | - Megan Aubin
- Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida 32816, United States
| | - Akihiro Kushima
- Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida 32816, United States
| | - Jiyu Fang
- Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida 32816, United States
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20
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Kaur J, Malegaonkar JN, Bhosale SV, Singh PK. An anionic tetraphenyl ethylene based simple and rapid fluorescent probe for detection of trypsin and paraoxon methyl. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115980] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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21
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Singh G, Pandey SP, Singh PK. Anionic Polyelectrolyte-Induced Aggregation of Basic Orange 21: A Clue toward Metachromasia. J Phys Chem B 2021; 125:7033-7043. [PMID: 34137609 DOI: 10.1021/acs.jpcb.1c02127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The change in the color of chromophore upon being embedded in a biological tissue is known as metachromasia. Basic Orange 21 (BO21) is a cationic polymethine dye that has been implied as a supravital dye, which produces metachromasia in leukocytes. An improved differential counting of leukocytes has been achieved in the clinical setup based on characteristic metachromatic expressions of BO21 for different types of leukocytes. Although BO21 has been utilized as a chromatic indicator for leukocyte counting, there are limited number of investigations that focus on the factors that may be responsible for the spectral shift in absorption and emission spectra of BO21, which leads to its metachromatic behavior. In this work, we have investigated the effect of a synthetic anionic polyelectrolyte, polystyrene sulfonate (PSS), on the photophysical properties of BO21, using steady-state emission, ground-state absorption, and time-resolved emission measurements, to get an understanding of the factors that may be responsible for the spectral shift of BO21 in the cellular environment. PSS induces aggregation of BO21 molecules with large changes in its photophysical properties; this appears to be most likely the mechanism of spectral shift for BO21 reported in the cellular environment. The employment of external stimulus reveals BO21 aggregates to be significantly responsive toward external stimuli, for example, temperature and presence of salt in the medium, which further strengthens the proposal of aggregate formation. Further, we have also employed fluorescence upconversion spectroscopy with subpicosecond time resolution to estimate the excited-state lifetime of BO21.
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Affiliation(s)
- Gaurav Singh
- UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina, Santacruz (E), Mumbai 400098, India
| | - Shrishti P Pandey
- Amity Institute of Biotechnology, Amity University, Mumbai-Pune Expressway, Bhatan, Panvel, Mumbai 410206, India.,Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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Awasthi AA, Pandey SP, Singh PK. Supramolecular Control on the Optical Properties of a Dye-Polyelectrolyte Assembly. Chemphyschem 2021; 22:975-984. [PMID: 33759328 DOI: 10.1002/cphc.202100092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/17/2021] [Indexed: 12/16/2022]
Abstract
Control of fluorescent molecular assemblies is an exciting area of research with large potential for various important applications, such as, fluorescence sensing/probing, cell imaging and monitoring drug-delivery. In the present contribution, we have demonstrated control on the extent of aggregation of a dye-polyelectrolyte assembly using a macrocyclic host molecule, sulfobutylether-β-cyclodextrin (SBE-β-CD). Initially, a cationic molecular rotor based organic dye, Auramine-O (AuO), undergoes aggregation in the presence of an anionic polyelectrolyte, polystyrene sulfonate (PSS), and displays a broad intense new emission band along with large variation in its absorption features and excited-state lifetime. A manipulation of the monomer-aggregate equilibrium of the dye-polyelectrolyte assembly has been achieved by introducing a cyclodextrin based supramolecular host, SBE-β-CD, which leads to relocation of AuO molecules from polyelectrolyte (PSS) to supramolecular host cavity, owing to the formation of a host-guest complex between AuO and SBE-β-CD. A reversible control on this manipulation of monomer-aggregate equilibrium is further achieved by introducing a competitive guest for the host cavity i. e., 1-Adamantanol. Thus, we have demonstrated an interesting control on the dye-polyelectrolyte aggregate assembly using a supramolecular host molecule which open up exciting possibilities to construct responsive materials using a repertoire of various host-specific guest molecules.
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Affiliation(s)
- Ankur A Awasthi
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, India
| | - Shrishti P Pandey
- Amity Institute of Biotechnology, Amity University, Mumbai-Pune Expressway, Bhatan, Panvel, Mumbai, 410206, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai-400 094, India
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23
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Desai AM, Pandey SP, Singh PK. Effect of counter-anions on the aggregation of Thioflavin-T. Phys Chem Chem Phys 2021; 23:9948-9961. [PMID: 33861224 DOI: 10.1039/d1cp00193k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The aggregation of small molecules in aqueous solution is known to be influenced by the ionic strength of the medium; however, the role played by the identity of salt in the phenomenon of small molecule aggregation is rarely investigated. In the present contribution, we have investigated the effect of counter-anions on the aggregation of a popular cationic amyloid sensing probe, Thioflavin-T (ThT), by taking six different anions, viz. chloride, bromide, acetate, iodide, tetrafluoroborate, and perchlorate. Our results clearly indicate that it is not the ionic strength of the medium which solely controls aggregation of small molecules but distinct ions behave distinctly with regard to the organization. In fact, distinct ion effects play a major role in the salt induced organization of fluorophores. Using detailed steady-state emission, time-resolved emission, and ground-state absorption measurements, the optical properties of salt induced aggregates of ThT have been characterized. We have rationalized our observations on the basis of the theory of matching water affinity, which suggests that the matching free hydration energy is a critical aspect for the formation of contact ion pairs, which eventually results in aggregation. In brief, a larger sized anion, perchlorate, has a lower free energy of hydration and forms a suitable contact ion pair, with a larger organic cation, ThT, having weaker hydration. This contact ion-pair formation subsequently leads to the formation of an aggregate assembly which is found to be emissive in nature. Therefore, it is possible to induce aggregation of ThT by selecting the right counterion with the appropriate size, which may help us to evaluate the false positive signals when high ionic strength and specific counterions are present in the sensing matrix.
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Affiliation(s)
- Akshat M Desai
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
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25
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Warerkar OD, Mudliar NH, Singh PK. A hemicyanine based fluorescence turn-on sensor for amyloid fibril detection in the far-red region. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Singh VR, Pandey SP, Singh PK. A polyelectrolyte based supramolecular assembly for ratiometric sensing of ATP with very high discrimination from pyrophosphate. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115314] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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27
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Pandey SP, Jha P, Singh PK. A colorimetric and fluorometric based dual readout approach for effective heparin sensing. Int J Biol Macromol 2021; 178:536-546. [PMID: 33621577 DOI: 10.1016/j.ijbiomac.2021.02.134] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 02/16/2021] [Accepted: 02/18/2021] [Indexed: 12/18/2022]
Abstract
Devising fluorescence-based turn-on probes for the specific and sensitive detection of Heparin is of utmost clinical importance. In this contribution, we have identified a molecular rotor based asymmetric cyanine probe, thiazole orange (TO), which enables an efficient colorimetric and fluorimetric detection of Heparin. TO undergoes the formation of emissive H-aggregates upon interaction with Heparin that display an impressive emission enhancement of ~22 fold together with drastic changes in the absorption spectra that yields a prominent colour change in the solution from orange to yellow. These seldom reported emissive H-aggregates of TO, serve as an efficient platform for Heparin detection with a LOD of 19 nM, fluorometrically and 34 nM, colorimetrically. The TO-Heparin complex is also accompanied by a large change in the excited-state lifetime. The TO-Heparin complex has been further utilized for the detection of Protamine, which is the only medically affirmed antitoxin of Heparin. Overall, our sensing system offers several advantages, such as, simple, dual read-out, economic and specific detection of Heparin with longer excitation and emission wavelength, rapid naked eye detection and utilizes an in-expensive commercially available fluoprophore, TO. Most importantly, our sensing system also displays a good performance in the biologically complex human serum matrix.
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Affiliation(s)
- Shrishti P Pandey
- Amity Institute of Biotechnology, Amity University, Mumbai-Pune Expressway, Bhatan, Panvel, Mumbai 410206, India
| | - Pamela Jha
- Amity Institute of Biotechnology, Amity University, Mumbai-Pune Expressway, Bhatan, Panvel, Mumbai 410206, India
| | - Prabhat K Singh
- Radiation& Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 400085, India.
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28
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Chakraborty G, Singh PK, Pal H. A cationic cyclodextrin assisted aggregation of an anionic pyrene derivative and its stimuli responsive behavior. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114499] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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29
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Mudliar NH, Dongre PM, Singh PK. A Heparin based dual ratiometric sensor for Thrombin. Int J Biol Macromol 2020; 167:1371-1378. [PMID: 33202269 DOI: 10.1016/j.ijbiomac.2020.11.091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/05/2020] [Accepted: 11/12/2020] [Indexed: 02/06/2023]
Abstract
Thrombin is an important enzyme that plays a pivotal role in the blood clotting pathways. An imbalance in the activity of this enzyme is clinically known to be associated with various diseases, such as thrombosis, inflammation, atherosclerosis, and haemophilia, suggesting the need to devise sensors for Thrombin detection. However, the majority of the fluorescence-based Thrombin assays rely on fluorescence labelling assays or Thrombin specific recognition biomolecules, such as, aptamers or antibody which requires sophisticated techniques and makes it very expensive. Herein, we report a simple, selective, sensitive and label-free fluorescence detection scheme for Thrombin which is based on the interaction between Thrombin and a fluorescent complex of Heparin with a molecular rotor dye, Thioflavin-T. The detection scheme exploits selective interaction between cationic Thrombin and anionic Heparin to modulate the monomer-aggregate equilibrium of the Thioflavin-T-Heparin system. Importantly, the present system offers a ratiometric response that has the ability for robust quantification of Thrombin concentration even in complex medium. The involvement of all commercially available components is a crucial advantage of this detection scheme. Further, the detection scheme also shows reasonable response in diluted serum matrix.
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Affiliation(s)
- Niyati H Mudliar
- Department of Biophysics, University of Mumbai, Vidyanagari, Kalina, Mumbai 400098, India
| | - Prabhakar M Dongre
- Department of Biophysics, University of Mumbai, Vidyanagari, Kalina, Mumbai 400098, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India.
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30
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A novel supramolecule-based fluorescence turn-on and ratiometric sensor for highly selective detection of glutathione over cystein and homocystein. Mikrochim Acta 2020; 187:631. [PMID: 33125575 DOI: 10.1007/s00604-020-04602-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 10/12/2020] [Indexed: 02/07/2023]
Abstract
A cyclodextrin-based fluorescence light-up and ratiometric sensor is reported for highly selective and sensitive recognition of glutathione over cystein and homocystein. The sensing scheme developed builds up on a supramolecular assembly formed between a molecular rotor dye (ThT) and a polyanionic supramolecular host (sulfated-β-cyclodextrin, SCD). The detection scheme is accomplished as follows: firstly, the bivalent Cu2+ quenches the emission from ThT-SCD assembly by causing the dissociation of ThT molecules from SCD surface. Secondly, when GSH is added to the copper-quenched system, owing to specific interaction between Cu2+ and GSH, Cu2+ is removed from the SCD which again allows the formation of ThT-SCD assembly. Indeed, this scheme of disassembly and reassembly successively caused by Cu2+ and GSH in the aqueous solution empowers our sensor framework to work as a good ratiometric sensor for the detection of GSH. The sensor scheme shows a linear response in the range 0-250 μM with a LOD of 2.4 ± 0.2 μM in aqueous solution and 13.6 ± 0.5 μM in diluted human serum sample. The sensor system is excited at 410 nm and the emission signal is plotted as a ratio of intensity at 545 nm (aggregate band) and 490 nm (monomer band). This ratiometric sensor system is highly selective to glutathione over cystein, homocystein, and other amino acids. Additionally, response of the sensor system towards GSH in complex biological media of serum samples demonstrates its potential for practical utility. Graphical abstract.
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31
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Pandey SP, Jha P, Singh PK. Aggregation induced emission of an anionic tetraphenylethene derivative for efficient protamine sensing. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113625] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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32
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An anionic polyelectrolyte induced aggregate assembly of Thioflavin-T: A prospective platform for Protamine sensing. Int J Biol Macromol 2020; 164:1174-1182. [PMID: 32710965 DOI: 10.1016/j.ijbiomac.2020.07.182] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 07/08/2020] [Accepted: 07/16/2020] [Indexed: 12/23/2022]
Abstract
Protamine, a polycation, is biologically and medically relevant protein. Protamine exhibits a wide array of functions in biological processes like gene transfer, tissue and organogenesis, cell reproduction, etc. Medically, Protamine is the only clinically approved antidote for Heparin and is routinely used in various surgical interventions, and hence controlling Protamine dosing in patients is very crucial. Taking into account the medical significance of Protamine, designing simple, reliable and sensitive fluorescence sensors is highly desirable. In this work, we propose one such sensitive and reliable fluorescent sensor which is based on a template of dye-polyelectrolyte assembly constituting a molecular rotor dye, Thioflavin-T and an anionic synthetic polyelectrolyte, polystyrene sulfonate. The addition of Protamine, prompts drastic modulations in spectral features of dye-polyelectrolyte assembly which enables sensitive detection of Protamine in aqueous solution. Apart from sensitive detection, our sensing platform aids in highly selective sensing of Protamine compared to other proteins. Moreover, our sensor system is constructed on label-free, inexpensive, commercially available molecules posing as an advantage over other sensor systems which involve laborious synthesis protocols. Most importantly, our sensor template is able to sense Protamine in diluted serum sample, indicating the potential practical utility of our sensor system.
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33
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Tian T, Qian T, Sui X, Yu Q, Liu Y, Liu X, Chen Y, Wang YX, Hu W. Aggregation-Dependent Photoreactive Hemicyanine Assembly as a Photobactericide. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22552-22559. [PMID: 32345006 DOI: 10.1021/acsami.0c03894] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Organic materials that show substantial reactivity under visible light have received considerable attention due to their wide applications in chemical and biological systems. Hemicyanine pigments possess a strong intramolecular donor-acceptor structure and thereby display intense absorption in the visible spectral region. However, most excitons are consumed via the twisted intramolecular charge-transfer (TICT) process, making hemicyanines generally inert to light. Herein, we describe the development of an amphiphilic hemicyanine dye whose aggregation could be easily regulated using salt or counterions. More importantly, its intrinsic photoreactivity was successfully induced by steric restriction and cofacial arrangement within the H-aggregate, thus creating an effective photobactericide. This strategy could be extended to the development of photocatalysts for photosynthesis and a photosensitizer for photodynamic therapy.
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Affiliation(s)
- Tian Tian
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
| | - Tingjuan Qian
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
| | - Xinyu Sui
- Division of Nanophotonics CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Qilin Yu
- Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yingxin Liu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
| | - Xinfeng Liu
- Division of Nanophotonics CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Yulan Chen
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
| | - Yi-Xuan Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, Fuzhou International Campus, Tianjin University, Binhai New City, Fuzhou 350207, China
| | - Wenping Hu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, Fuzhou International Campus, Tianjin University, Binhai New City, Fuzhou 350207, China
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Wang PY, Ji QT, Xiang HM, Zhang TH, Zeng D, Zhou X, Chang F, Liu LW, Li Z, Yang S. Assembling Anthracene-Tailored Amphiphiles: Charge-Transfer Interactions Directed Hierarchical Nanofibers with Ameliorative Antibacterial Activity toward Plant Pathogens. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:5579-5585. [PMID: 32348138 DOI: 10.1021/acs.jafc.0c01991] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The effective prevention of plant bacterial infections has been complicated and challenged by unceasing bacterial resistance. The application of traditional bactericides has achieved certain effects to alleviate this situation. However, these chemicals also have limitations, such as short half-life in reality, limited bioavailability, and pollutant emission from their formulations. These disadvantages drive the demand for promoting antibacterial therapeutics. Self-assembled nanostructures based on amphiphiles have inherently versatile characteristics, including high durability, good bioavailability, sustained release, and regenerability. As such, they have garnered wide interest because of these advantages that may serve as a feasible platform for the management of pathogenic infections. Flexible tuning of the shapes of these nanostructures by manipulating noncovalent driving forces consequently results in different levels of antibacterial activity. Herein, an antibacterial amphiphile, 1-[11-(9-anthracenylmethoxy)-11-oxoundecyl]pyridinium bromide (AP), was assembled into microfilms in screening medium. Hierarchical nanofibers were constructed by introducing an electron-deficient trinitrofluorenone (TNF) molecule into the assembling system directed by charge-transfer (CT) interactions to further investigate the contribution of aggregate shape to bioactivity. Biological evaluation revealed that antibacterial efficacy improved after CT complex formation. This study provides an innovative platform for developing versatile assembled structures for restraining the propagation of plant pathogens and an improved understanding of the actual interplay between the self-assembly and antibacterial ability of bactericides at the supramolecular level.
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Affiliation(s)
- Pei-Yi Wang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R & D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Qing-Tian Ji
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R & D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Hong-Mei Xiang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R & D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Tai-Hong Zhang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R & D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Dan Zeng
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R & D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Xiang Zhou
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R & D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Fei Chang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R & D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Li-Wei Liu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R & D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Zhong Li
- College of Pharmacy, East China University of Science & Technology, Shanghai 200237, China
| | - Song Yang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R & D of Fine Chemicals of Guizhou University, Guiyang 550025, China
- College of Pharmacy, East China University of Science & Technology, Shanghai 200237, China
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35
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Pandey SP, Singh PK. A ratiometric scheme for the fluorescent detection of protamine, a heparin antidote. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112589] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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36
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Tsai M, Tsai S, Huang Y, Wang C, Sun S, Yang J. Hydrogen Bonding‐Induced H‐Aggregation for Fluorescence Turn‐On of the GFP Chromophore: Supramolecular Structural Rigidity. Chemistry 2020; 26:5942-5945. [DOI: 10.1002/chem.202000358] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 02/25/2020] [Indexed: 01/09/2023]
Affiliation(s)
- Meng‐Shiue Tsai
- Department of ChemistryNational (Taiwan) University, No 1, Sec 4 Roosevelt Rd Taipei 10617 Taiwan
- Institute of ChemistryAcademia Sinica, No. 128, Sec. 2 Academia Rd., Nankang Taipei 11529 Taiwan
| | - Sung‐Yu Tsai
- Department of Applied ChemistryNational Chiao-Tung University, No. 1001 University Rd Hsinchu 30010 Taiwan
| | - Yi‐Fan Huang
- Department of Applied ChemistryNational Chiao-Tung University, No. 1001 University Rd Hsinchu 30010 Taiwan
| | - Chien‐Lung Wang
- Department of Applied ChemistryNational Chiao-Tung University, No. 1001 University Rd Hsinchu 30010 Taiwan
| | - Shih‐Sheng Sun
- Institute of ChemistryAcademia Sinica, No. 128, Sec. 2 Academia Rd., Nankang Taipei 11529 Taiwan
| | - Jye‐Shane Yang
- Department of ChemistryNational (Taiwan) University, No 1, Sec 4 Roosevelt Rd Taipei 10617 Taiwan
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37
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Singh VR, Singh PK. A supramolecule based fluorescence turn-on and ratiometric sensor for ATP in aqueous solution. J Mater Chem B 2020; 8:1182-1190. [PMID: 31957759 DOI: 10.1039/c9tb02403d] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Considering the biological relevance of adenosine triphosphate (ATP) as an "energy currency" in all organisms and significance of its detection in various diseased conditions, enormous efforts have been made to develop selective and sensitive fluorescent sensors for the detection of ATP. However, these developed sensor probes frequently involve technically challenging and time-consuming synthetic protocols for the production of sensor molecules and often suffer from poor solubility in aqueous medium. Another major disadvantage of these developed sensor systems is their single wavelength based operation which makes their performance susceptible to minute changes in experimental conditions. Herein, we report a fluorescence turn-on ratiometric sensor for the detection of ATP which operates by the dissociation of Thioflavin-T-sulphated-β-cyclodextrin supramolecular assembly by Zn2+ followed by ATP induced reassociation of the same. This modulation of the monomer/aggregate equilibrium of the supramolecular assembly followed by subsequent interactions with Zn2+ and ATP acts as an optimal scheme for the ratiometric detection of ATP. Overall this supramolecular ensemble based sensing platform provides a simple, sensitive, selective and label free detection approach for ATP in aqueous solution. Importantly, our sensor platform responds to ATP in the biologically complex media of serum samples suggesting its potential for possible applications in real-life scenarios.
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Affiliation(s)
- Vidya R Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, Maharashtra, India.
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, Maharashtra, India.
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38
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Chakraborty G, Ray AK, Singh PK, Pal H. Does the degree of substitution on the cyclodextrin hosts impact their affinity towards guest binding? Photochem Photobiol Sci 2020; 19:956-965. [DOI: 10.1039/d0pp00103a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The degree of substitution on βCD rims by sulfobutylether groups significantly modulates the binding affinity of the SBEnβCD hosts for the studied cationic guest molecule.
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Affiliation(s)
- Goutam Chakraborty
- Laser and Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Alok K. Ray
- Laser and Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
- Homi Bhabha National Institute
| | - Prabhat K. Singh
- Homi Bhabha National Institute
- Mumbai-400094
- India
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
| | - Haridas Pal
- Homi Bhabha National Institute
- Mumbai-400094
- India
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
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39
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Singh VR, Malegaonkar JN, Bhosale SV, Singh PK. An ATP responsive fluorescent supramolecular assembly based on a polyelectrolyte and an AIE active tetraphenylethylene derivative. Org Biomol Chem 2020; 18:8414-8423. [DOI: 10.1039/d0ob01661f] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A supramolecular assembly is constructed using an anionic AIE active probe and a cationic polyelectrolyte to sense ATP fluorimetrically in solution.
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Affiliation(s)
- Vidya R. Singh
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Jotiram N. Malegaonkar
- Polymers and Functional Materials Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad – 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Sidhanath V. Bhosale
- Polymers and Functional Materials Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad – 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Prabhat K. Singh
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
- Homi Bhabha National Institute
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40
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Singh G, Singh PK. Stimulus-Responsive Supramolecular Host-Guest Assembly of a Cationic Pyrene Derivative with Sulfated β-Cyclodextrin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14628-14638. [PMID: 31609124 DOI: 10.1021/acs.langmuir.9b03083] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
In general, aggregation-prone organic molecules are prevented from self-aggregation in the presence of macrocyclic hosts like β-cyclodextrin because of their preference for the formation of inclusion complex with guest molecules. On the contrary, sulfate-laced β-cyclodextrin has been recently reported to induce the aggregation of some of the non-aggregation-prone organic dyes, which have been subsequently utilized for biosensing applications. In the present contribution, we report the interaction of a cationic organic probe molecule, 1-pyrene methyl amine (PMA), which belongs to one of the most useful families of organic fluorescent probes, that is, pyrene, with a sulfated β-cyclodextrin derivative (SCD). Interaction of a cationic probe with a β-cyclodextrin derivative was studied using a variety of photophysical methods such as ground-state absorption, steady-state emission, and time-resolved emission techniques. Detailed photophysical investigations have revealed that SCD induces the ground-state association of PMA molecules. This SCD-induced aggregation of PMA molecules has been attributed to the charge neutralization of the cationic probe by negatively charged sulfate groups, which subsequently lead to their association because of the close proximity on the rims of cyclodextrin. This monomer-dimer equilibrium of the PMA-SCD system is found to be extremely responsive to external chemical stimuli like temperature, pH, ionic strength of the medium, and organic solvent (dimethyl sulfoxide), which projects them as potential platforms for various sensing applications including bioanalytes. The supramolecular assembly has been demonstrated to sense arginine.
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Affiliation(s)
- Gaurav Singh
- UM-DAE Centre for Excellence in Basic Sciences , University of Mumbai , Kalina, Santacruz (E), Mumbai 400 098 , India
| | - Prabhat K Singh
- Radiation & Photochemistry Division , Bhabha Atomic Research Centre , Mumbai 400 085 , India
- Homi Bhabha National Institute , Training School Complex, Anushaktinagar, Mumbai 400 094 , India
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Desai AM, Singh PK. An Ultrafast Molecular‐Rotor‐Based Fluorescent Turn‐On Sensor for the Perrhenate Anion in Aqueous Solution. Chemistry 2019; 25:2035-2042. [DOI: 10.1002/chem.201804848] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Akshat M. Desai
- Radiation & Photochemistry DivisionBhabha Atomic Research Centre Trombay Mumbai 400085 India
| | - Prabhat K. Singh
- Radiation & Photochemistry DivisionBhabha Atomic Research Centre Trombay Mumbai 400085 India
- Training School Complex, AnushaktinagarHomi Bhabha National Institute Mumbai 400094 India
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42
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Sayed M, Panjwani S, Pal H. Sulfated β-Cyclodextrin Templated Assembly and Disassembly of Acridine Orange: Unraveling Contrasting Binding Mechanisms and Light Off/On Switching. ChemistrySelect 2018. [DOI: 10.1002/slct.201801563] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Shirin Panjwani
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Haridas Pal
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre, Mumbai 400 085, India & Homi Bhabha National Institute, Anushaktinagar; Mumbai 400 094 India
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43
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Pettiwala AM, Singh PK. A supramolecular assembly enables discrimination between metalloproteins and non-metalloproteins. Chem Commun (Camb) 2018; 54:4537-4540. [DOI: 10.1039/c8cc02165a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A supramolecular assembly yields turn-on fluorescence response for non-metalloproteins and turn-off response for metalloproteins.
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Affiliation(s)
- Aafrin M. Pettiwala
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
| | - Prabhat K. Singh
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
- Homi Bhabha National Institute
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Zhao Q, Chen Y, Li SH, Liu Y. Tunable white-light emission by supramolecular self-sorting in highly swollen hydrogels. Chem Commun (Camb) 2018; 54:200-203. [DOI: 10.1039/c7cc08822a] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Fluorescence-tunable hydrogels especially emitting white-light were achieved by swelling hydrogels in solutions containing two kinds of dyes.
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Affiliation(s)
- Qian Zhao
- College of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Yong Chen
- College of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Sheng-Hua Li
- College of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Yu Liu
- College of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
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45
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Pettiwala A, Singh PK. Supramolecular Dye Aggregate Assembly Enables Ratiometric Detection and Discrimination of Lysine and Arginine in Aqueous Solution. ACS OMEGA 2017; 2:8779-8787. [PMID: 30023591 PMCID: PMC6045403 DOI: 10.1021/acsomega.7b01546] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 11/23/2017] [Indexed: 05/28/2023]
Abstract
Constructing sensor systems for rapid and selective detection of small biomolecules such as amino acids is a major area of focus in bioanalytical chemistry. Considering the biological relevance of arginine and lysine, significant efforts have been directed to develop fluorescent sensors for their detection. However, these developed sensors suffer from certain disadvantages such as poor aqueous solubility, technically demanding and time-consuming synthetic protocols, and more importantly, most of them operate through single wavelength measurements, making their performance prone to small variations in experimental conditions. Herein, we report a ratiometric sensor that operates through lysine- and arginine-induced dissociation of a supramolecular assembly consisting of emissive H-aggregates of a molecular rotor dye, thioflavin-T (ThT), on the surface of a polyanionic supramolecular host, sulfated β-cyclodextrin. This disassembly brings out the modulation of monomer-aggregate equilibrium in the system which acts as an ideal scheme for the ratiometric detection of lysine and arginine in the aqueous solution. Besides facile framework of our sensor system, it employs a commercially available inexpensive probe molecule, ThT, which provides an added advantage over other sensor systems that employ synthetically demanding probe molecules. Importantly, the distinctive feature of the ratiometric detection of arginine and lysine provides an inherent advantage of increased accuracy in quantitative analysis. Interestingly, we have also demonstrated that arginine displays a multiwavelength distinctive recognition pattern which distinguishes it from lysine, using a single supramolecular ensemble. Furthermore, our sensor system also shows response in heterogeneous, biologically complex media of serum samples, thus extending its possible use in real-life applications.
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Affiliation(s)
- Aafrin
M. Pettiwala
- Radiation
& Photochemistry Division, Bhabha Atomic
Research Centre, Mumbai 400085, India
| | - Prabhat K. Singh
- Radiation
& Photochemistry Division, Bhabha Atomic
Research Centre, Mumbai 400085, India
- Homi
Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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46
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Awasthi AA, Singh PK. Stimulus-Responsive Supramolecular Aggregate Assembly of Auramine O Templated by Sulfated Cyclodextrin. J Phys Chem B 2017; 121:6208-6219. [DOI: 10.1021/acs.jpcb.7b03592] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ankur A. Awasthi
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Prabhat K. Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
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Sayed M, Jha S, Pal H. Complexation induced aggregation and deaggregation of acridine orange with sulfobutylether-β-cyclodextrin. Phys Chem Chem Phys 2017; 19:24166-24178. [DOI: 10.1039/c7cp03135a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The present study illustrates intriguing switching of multi-mode binding interactions of acridine orange dye with a sulfobutylether-β-cyclodextrin host.
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Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Shruti Jha
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Haridas Pal
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
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Mudliar NH, Pettiwala AM, Awasthi AA, Singh PK. On the Molecular Form of Amyloid Marker, Auramine O, in Human Insulin Fibrils. J Phys Chem B 2016; 120:12474-12485. [PMID: 27973839 DOI: 10.1021/acs.jpcb.6b10078] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Designing extrinsic fluorescence sensors for amyloid fibrils is a very active and important area of research. Recently, an ultrafast molecule rotor dye, Auramine O (AuO), has been projected as a fluorescent amyloid marker. It has been claimed that AuO scores better than the most extensively utilized gold-standard amyloid probe, Thioflavin-T (ThT). This advantage arises from the fact that AuO, in addition to its usual emission band (∼500 nm), also displays a large red-shifted emission band (∼560 nm), exclusively in the presence of human insulin fibril medium and not in the native protein or buffer media. On the contrary, for ThT, the emission maximum (∼490 nm) largely remains unchanged while going from protein to fibril. This otherwise unknown large red-shifted emission band of AuO, observed in the presence of human insulin fibrils, was tentatively attributed to a species formed upon fast proton dissociation from excited AuO. It was proposed that because of the long excited-state lifetime (∼1.8 ns) of AuO upon association with human insulin fibrils, this fast proton dissociation from excited AuO could be observed, which is otherwise not observed in buffer or native protein media, owing to its very short excited-state lifetime (∼1 ps). Herein, we show that despite the long excited-state lifetime of AuO in other fibrillar media (human serum albumin and lysozyme), the new red-shifted emission band at 560 nm is not observed, thus possibly suggesting a different origin of the red-shifted emission band of AuO in human insulin fibril medium. We convincingly show that this red-shifted band of AuO (∼560 nm) could be observed under conditions that promote dye aggregation, such as a premicellar concentration of surfactants and polyelectrolytes. These AuO aggregates display strong emission wavelength dependence of transient decay traces, similar to that for AuO in human insulin fibril medium. Detailed time-resolved emission spectral (TRES) measurements suggest that the AuO/premicellar surfactant and AuO/human insulin fibril system share similar features, such as a dynamic red-shift in TRES and an isoemissive point in the time-resolved area-normalized emission spectra, suggesting that the characteristic red-shifted emission band of AuO in human insulin fibril medium may arise from AuO aggregates.
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Affiliation(s)
- Niyati H Mudliar
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
| | - Aafrin M Pettiwala
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
| | - Ankur A Awasthi
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
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Mudliar NH, Singh PK. Emissive H-Aggregates of an Ultrafast Molecular Rotor: A Promising Platform for Sensing Heparin. ACS APPLIED MATERIALS & INTERFACES 2016; 8:31505-31509. [PMID: 27933968 DOI: 10.1021/acsami.6b12729] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Constructing "turn on" fluorescent probes for heparin, a most widely used anticoagulant in clinics, from commercially available materials is of great importance, but remains challenging. Here, we report the formation of a rarely observed emissive H-aggregate of an ultrafast molecular rotor dye, Thioflavin-T, in the presence of heparin, which provides an excellent platform for simple, economic and rapid fluorescence turn-on sensing of heparin. Generally, H-aggregates are considered as serious problem in the field of biomolecular sensing, owing to their poorly emissive nature resulting from excitonic interaction. To the best of our knowledge, this is the first report, where contrastingly, the turn-on emission from the H-aggregates has been utilized in the biomolecule sensing scheme, and enables a very efficient and selective detection of a vital biomolecule and a drug with its extensive medical applications, i.e., heparin. Our sensor system offers several advantages including, emission in the biologically advantageous red-region, dual sensing, i.e., both by fluorimetry and colorimetry, and most importantly constructed from in-expensive commercially available dye molecule, which is expected to impart a large impact on the sensing field of heparin. Our system displays good performance in complex biological media of serum samples. The novel Thioflavin-T aggregate emission could be also used to probe the interaction of heparin with its only clinically approved antidote, Protamine.
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Affiliation(s)
- Niyati H Mudliar
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
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Mudliar NH, Sadhu B, Pettiwala AM, Singh PK. Evaluation of an Ultrafast Molecular Rotor, Auramine O, as a Fluorescent Amyloid Marker. J Phys Chem B 2016; 120:10496-10507. [DOI: 10.1021/acs.jpcb.6b07807] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Niyati H. Mudliar
- Radiation & Photochemistry Division, ‡Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Biswajit Sadhu
- Radiation & Photochemistry Division, ‡Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Aafrin M. Pettiwala
- Radiation & Photochemistry Division, ‡Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Prabhat K. Singh
- Radiation & Photochemistry Division, ‡Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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