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Regulating Optoelectronics of Carbon Dots with Redox-active Dopamine. TALANTA OPEN 2023. [DOI: 10.1016/j.talo.2023.100198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023] Open
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2
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Rana DK, Bhattacharya SC. Implication toward a simple strategy to generate pH tunable FRET-based biosensing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 282:121687. [PMID: 35940066 DOI: 10.1016/j.saa.2022.121687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/24/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
The present contribution depicts a unique approach to generate tunable Förster resonance energy transfer (FRET) emission with variation of pH of the medium. The pH sensitive absorption of Doxorubicin leads to modification of spectral overlap between emission spectra of donor (Pyrazoline) and absorption spectra of acceptor (Doxorubicin) thereby sensing maximum FRET efficiency in an optimum pH (near pKa of Doxorubicin). This drug molecule exhibits an instantaneous conformation change at a particular pH, which consequences on abrupt ON-and-OFF FRET efficiency. At elevated pH, both the drug molecules exhibit conformational change and form stable fluorescent exciplex, switching off the FRET emission. Confocal fluorescence images of live HepG2 cells imply that the sensor can proficiently go through the cell membrane and can be applied in the controlled delivery of drug to the tumor cell lines.
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Affiliation(s)
- Dipak Kumar Rana
- Department of Chemistry, Saldiha College, Bankura - 722173, West Bengal, India.
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3
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Biocompatible and optically stable hydrophobic fluorescent carbon dots for isolation and imaging of lipid rafts in model membrane. Anal Bioanal Chem 2022; 414:6055-6067. [PMID: 35697813 DOI: 10.1007/s00216-022-04165-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/06/2022] [Accepted: 06/02/2022] [Indexed: 11/01/2022]
Abstract
Lateral heterogeneity in cell membranes features a variety of compositions that influence their inherent properties. One such biophysical variation is the formation of a membrane or lipid raft, which plays important roles in many cellular processes. The lipid rafts on the cell membrane are mostly identified by specific dyes and heavy metal quantum dots, which have their own drawbacks, such as cytotoxicity, photostability, and incompatibility. To this end, we synthesized special, hydrophobic, fluorescent, photostable, and non-cytotoxic carbon dots (CDs) by solvent-free thermal treatment using non-cytotoxic materials and incorporated into the lipid bilayers of giant unilamellar vesicles (GUVs) made from 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and dipalmitoylphosphatidylcholine (DPPC) lipids. A 2:2:1 mixture of DOPC, DPPC, and cholesterol (Chol) develops lipid rafts on the membrane by phase separation. The photophysical properties of the CDs get modulated on incorporation into the lipid rafts that identifies the membrane heterogeneity. The main attempt in this work is to develop a new, simple, cost-effective, and bio-friendly lipid raft marker, which can be used in biological applications, alongside other conventional raft markers, with more advantages.
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4
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Mudi PK, Singla L, Chamuah A, Bhattacharya S, Roychoudhury A, Biswas B. Schiff Base Driven Denticity-Fluctuated Structural Assortment of Zinc-pseudohalide Complexes: Synthesis, Structures and Electrical Transport Properties. CrystEngComm 2022. [DOI: 10.1039/d1ce01646f] [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
We report peculiar characteristics of a polydentate Schiff base towards zinc(II) ion in the presence of pseudohalides (thiocyanate and azide) and the charge transport properties of the zinc complexes mediated...
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5
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Mukherjee I, Ghosh A, Purkayastha P. Förster Resonance Energy Transfer from Carbon Nanoparticles to a DNA-Bound Compound: A Method to Detect the Nature of Binding. J Phys Chem B 2021; 125:10126-10137. [PMID: 34465085 DOI: 10.1021/acs.jpcb.1c05149] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A drug molecule can bind in various orientations to a DNA strand. Nature of the binding decides the functionality and efficacy of the drug. To innovate a new method to detect the nature of binding of a drug to DNA strands, herein we have used the dipole-dipole interaction driven Förster resonance energy transfer (FRET) between carbon nanoparticles (CNPs) and a DNA-bound small molecule, (E)-3-ethyl-2-(4-(pyrrolidin-1-yl)styryl)benzo[d]thiazol-3-ium (EPSBT), which belongs to the hemicyanine family and binds typically to the minor groove of a DNA duplex. EPSBT was designed to obtain appreciable fluorescence quantum yield, which constructed an efficient FRET pair with the synthesized CNPs. The tested compound prefers the thymine nucleobase to bind to the DNA strand. Orientation of its dipole on attachment to the DNA strand and the donor-acceptor distance dictate the FRET efficiency with the CNPs. The results provided a precise estimation of the nature of binding of EPSBT to the DNA backbone and, hence, supposedly will help in deciding the functional efficacy.
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Affiliation(s)
- Ishani Mukherjee
- Department of Chemical Sciences and Center for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, WB 741246, India
| | - Ashutosh Ghosh
- Department of Chemical Sciences and Center for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, WB 741246, India
| | - Pradipta Purkayastha
- Department of Chemical Sciences and Center for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, WB 741246, India
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Mondal S, Ghorai N, Bhunia S, Ghosh HN, Amdursky N. Long-range light-modulated charge transport across the molecular heterostructure doped protein biopolymers. Chem Sci 2021; 12:8731-8739. [PMID: 34257872 PMCID: PMC8246076 DOI: 10.1039/d1sc00487e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 05/17/2021] [Indexed: 01/12/2023] Open
Abstract
Biological electron transfer (ET) across proteins is ubiquitous, such as the notable photosynthesis example, where light-induced charge separation takes place within the reaction center, followed by sequential ET via intramolecular cofactors within the protein. Far from biology, carbon dots (C-Dots) with their unique optoelectronic properties can be considered as game-changers for next-generation advanced technologies. Here, we use C-Dots for making heterostructure (HS) configurations by conjugating them to a natural ET mediator, the hemin molecule, thus making an electron donor-acceptor system. We show by transient absorption and emission spectroscopy that the rapid intramolecular charge separation happens following light excitation, which can be ascribed to an ultrafast electron and hole transfer (HT) from the C-Dot donor to the hemin acceptor. Upon integrating the HS into a protein matrix, we show that this HT within the HS configuration is 3.3 times faster compared to the same process in solution, indicating the active role of the protein in supporting the rapid light-induced long-range intermolecular charge separation. We further use impedance, electrochemical, and transient photocurrent measurements to show that the light-induced transient charge separation results in an enhanced ET and HT efficiency across the protein biopolymer. The charge conduction across our protein biopolymers, reaching nearly 0.01 S cm-1, along with the simplicity and low-cost of their formation promotes their use in a variety of optoelectronic devices, such as artificial photosynthesis, photo-responsive protonic-electronic transistors, and photodetectors.
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Affiliation(s)
- Somen Mondal
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Haifa 3200003 Israel
- Institute of Chemical Technology, Mumbai, Marathwada Campus Jalna Maharashtra 431 203 India
| | - Nandan Ghorai
- Institute of Nano Science and Technology Mohali Punjab 160064 India
| | - Soumyadip Bhunia
- Indian Institute of Science Education and Research (IISER) Kolkata Mohanpur West Bengal 741246 India
| | - Hirendra N Ghosh
- Institute of Nano Science and Technology Mohali Punjab 160064 India
| | - Nadav Amdursky
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Haifa 3200003 Israel
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Motlagh PY, Khataee A, Hassani A, Sadeghi Rad T. ZnFe-LDH/GO nanocomposite coated on the glass support as a highly efficient catalyst for visible light photodegradation of an emerging pollutant. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112532] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lehmacher R, Feldmann C. Polyol-Mediated Synthesis of Nitrogen-Containing Carbon-Dots from Tetracyanobenzene with Intense Red Fluorescence. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1470. [PMID: 31623205 PMCID: PMC6835685 DOI: 10.3390/nano9101470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 10/09/2019] [Accepted: 10/13/2019] [Indexed: 02/02/2023]
Abstract
Nitrogen-containing C-dots were prepared by heating (160 °C, 1 h) 1,2,4,5-tetracyanobenzene (TCB) in polyethylene glycol 400 (PEG400). The as-prepared monocrystalline C-dots were 2-4 nm in diameter and contained 24.4 wt. % of nitrogen. They showed intense fluorescence under excitation at 400-500 nm as well as under excitation at 600-700 nm. In addition to an excitation-wavelength-depending emission at 400 to 650 nm, the emission spectra exhibited a strong emission peaking at 715 nm, whose position was independent from the wavelength of excitation. For this deep-red emission a remarkable quantum yield of 69% was detected. The synthesis of nitrogen-containing C-dotswas completely performed in the liquid phase. Moreover, the C-dots could be directly dispersed in water. The resulting aqueous suspensions of PEG400-stabilized nitrogen-containing C-dots also showed intense red emission that was visible to the naked eye.
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Affiliation(s)
- Roman Lehmacher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany.
| | - Claus Feldmann
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany.
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Mondal S, Yucknovsky A, Akulov K, Ghorai N, Schwartz T, Ghosh HN, Amdursky N. Efficient Photosensitizing Capabilities and Ultrafast Carrier Dynamics of Doped Carbon Dots. J Am Chem Soc 2019; 141:15413-15422. [PMID: 31453686 DOI: 10.1021/jacs.9b08071] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Carbon dots (C-Dots) are promising new materials for the development of biocompatible photosensitizers for solar-driven catalysis and hydrogen production in aqueous solution. Compared to common semiconducting quantum dots, C-Dots have good physicochemical, as well as photochemical stability, optical brightness, stability and nontoxicity, while their carbon based source results in tunable surface chemistry, chemical versatility, low cost, and biocompatibility. Herein we show that doping the C-Dots with phosphate or boron significantly influences their excited-state dynamics, which is observed by the formation of a unique long-lived photoproduct as a function of the different dopants. To probe the photosensitizing capabilities of the C-Dots, we followed the photoreduction of methyl viologen (MV2+), which acts as a molecular redox mediator (electron acceptor) to the C-Dots (the photosensitizer, i.e., electron donor) in aqueous solution, using steady-state and time-resolved fluorescence and absorption spectroscopic techniques as well as electrochemical measurements. We show that ultrafast electron transfer to MV2+ and slow charge recombination results in a high quantum yield of MV2+ photoreduction, while the doping drastically influences this quantum yield of MV2+ radical. Our findings contribute to the photophysical understanding of this intriguing and relatively new carbon-based nanoparticle and can improve the design and development of efficient photosensitizers over commonly used heterogeneous catalysts in photocatalytic systems by increasing the efficiency of radical generation.
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Affiliation(s)
- Somen Mondal
- Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200003 , Israel
| | - Anna Yucknovsky
- Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200003 , Israel
| | - Katherine Akulov
- School of Chemistry , Tel Aviv University , Tel Aviv 6997801 , Israel
| | - Nandan Ghorai
- Institute of Nano Science and Technology , Mohali , Punjab 160064 , India
| | - Tal Schwartz
- School of Chemistry , Tel Aviv University , Tel Aviv 6997801 , Israel
| | - Hirendra N Ghosh
- Institute of Nano Science and Technology , Mohali , Punjab 160064 , India
| | - Nadav Amdursky
- Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200003 , Israel
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10
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Yen YT, Lin YS, Chen TY, Chyueh SC, Chang HT. Carbon dots functionalized papers for high-throughput sensing of 4-chloroethcathinone and its analogues in crime sites. ROYAL SOCIETY OPEN SCIENCE 2019; 6:191017. [PMID: 31598318 PMCID: PMC6774952 DOI: 10.1098/rsos.191017] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/12/2019] [Indexed: 06/10/2023]
Abstract
Sensitive and selective assays are demanded for quantitation of new psychoactive substances such as 4-chloroethcathinone that is a π-conjugated keto compound. Carbon dots (C-dots) prepared from L-arginine through a hydrothermal route have been used for quantitation of 4-chloroethcathinone in aqueous solution and on C-dot-functionalized papers (CDFPs). To prepare CDFPs, chromatography papers, each with a pattern of 8 × 12 circles (wells), are first fabricated through a solid-ink printing method and then the C-dots are coated into the wells. π-Conjugated keto or ester compounds induce photoluminescence quenching of C-dots through an electron transfer process. At pH 7.0, the CDFPs allow screening of abused drugs such as cocaine, heroin and cathinones. Because of poor solubility of heroin and cocaine at pH 11.0, the C-dot probe is selective for cathinones. The C-dots in aqueous solution and CDFPs at pH 11.0 allow quantitation of 4-chloroethcathinone down to 1.73 mM and 0.14 mM, respectively. Our sensing system consisting of a portable UV-lamp, a smartphone and a low-cost CDFP has been used to detect cathinones, cocaine and heroin at pH 7.0, showing its potential for screening of these drugs in crime sites.
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Affiliation(s)
- Yao-Te Yen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan, Republic of China
- Department of Forensic Science, Investigation Bureau, Ministry of Justice, Xindian Dist, New Taipei City 23149, Taiwan, Republic of China
| | - Yu-Syuan Lin
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan, Republic of China
| | - Ting-Yueh Chen
- Department of Forensic Science, Investigation Bureau, Ministry of Justice, Xindian Dist, New Taipei City 23149, Taiwan, Republic of China
| | - San-Chong Chyueh
- Department of Forensic Science, Investigation Bureau, Ministry of Justice, Xindian Dist, New Taipei City 23149, Taiwan, Republic of China
| | - Huan-Tsung Chang
- Department of Forensic Science, Investigation Bureau, Ministry of Justice, Xindian Dist, New Taipei City 23149, Taiwan, Republic of China
- Department of Chemistry, Chung Yuan Christian University, Chungli District, Taoyuan City 32023, Taiwan, Republic of China
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Halder D, Mallick A, Purkayastha P. Doping Dopamine in Carbon Nanoparticles: A New Multifunctional Logic-Based Decision-Making Molecule. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10885-10889. [PMID: 31342752 DOI: 10.1021/acs.langmuir.9b01646] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A dopamine-functionalized carbon nanoparticle (CNP)-based platform is designed to reversibly control the optical signal, leading to a multifunctional logic system regulated by pH and light. pH-regulated unique reversible transformation of oxidized and reduced forms of a neurotransmitter, dopamine, conjugated with CNPs plays a decisive role in capturing the final output of the logic function. Inspired by this phenomenon, herein, we report the use of dopamine-docked CNPs to construct different molecular logic gates with an intention to develop the next-generation molecular logic gates. We could successfully construct two basic molecular logic gates, namely, YES and NOT, using one input; two modular logic gates; an IMPLICATION logic gate using two inputs; and finally a combination of OR and AND gates using three inputs. The optical response of the synthesized NP conjugate provides a fluorescence-based "Erase-Read-Write-Read" function. The proposed phenomenon may open a new concept of biochemical logic gates with fluorescence output for neuronal imaging.
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Affiliation(s)
- Dipanjan Halder
- Department of Chemical Sciences , Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246 , West Bengal , India
| | - Arabinda Mallick
- Department of Chemistry , Kazi Nazrul University , Asansol 713340 , West Bengal , India
| | - Pradipta Purkayastha
- Department of Chemical Sciences , Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246 , West Bengal , India
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12
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Bhunia S, Seth SK, Gupta P, Karmakar M, Datta PK, Purkayastha P. Ultrafast Photoinduced Electron Transfer from Cyclometalated Rhodium and Iridium Complexes to Cyan Emitting Copper Nanoclusters: Footsteps toward Light Harvesting. ChemistrySelect 2019. [DOI: 10.1002/slct.201901369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Soumyadip Bhunia
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Kolkata Mohanpur 741246, WB India
| | - Sourav Kanti Seth
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Kolkata Mohanpur 741246, WB India
| | - Parna Gupta
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Kolkata Mohanpur 741246, WB India
| | - Manobina Karmakar
- Department of PhysicsIndian Institute of Technology (IIT) Kharagpur Kharagpur 721302, WB India
| | - Prasanta Kumar Datta
- Department of PhysicsIndian Institute of Technology (IIT) Kharagpur Kharagpur 721302, WB India
| | - Pradipta Purkayastha
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Kolkata Mohanpur 741246, WB India
- Centre for Advanced Functional Materials (CAFM)Indian Institute of Science Education and Research (IISER) Kolkata Mohanpur 741246, WB India
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Mohapatra S, Das RK. Dopamine integrated B, N, S doped CQD nanoprobe for rapid and selective detection of fluoride ion. Anal Chim Acta 2019; 1058:146-154. [DOI: 10.1016/j.aca.2019.01.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 01/03/2019] [Indexed: 12/21/2022]
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Unveiling the interaction between carbon nanodot and IR light emitting fluorescent dyes inside the confined micellar environment. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.03.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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15
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Gharat PM, Chethodil JM, Srivastava AP, P. K. P, Pal H, Dutta Choudhury S. An insight into the molecular and surface state photoluminescence of carbon dots revealed through solvent-induced modulations in their excitation wavelength dependent emission properties. Photochem Photobiol Sci 2019; 18:110-119. [DOI: 10.1039/c8pp00373d] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solvent environment can uniquely alter excitation wavelength dependent photoluminescence of carbon dots.
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Affiliation(s)
- Poojan Milan Gharat
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Jiddhu M. Chethodil
- Department of Nanotechnology
- Noorul Islam Centre for Higher Education
- Kumaracoil, Kanyakumari District
- India
| | - Amit P. Srivastava
- Mechanical Metallurgy Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
| | - Praseetha P. K.
- Department of Nanotechnology
- Noorul Islam Centre for Higher Education
- Kumaracoil, Kanyakumari District
- India
| | - Haridas Pal
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
- Homi Bhabha National Institute
| | - Sharmistha Dutta Choudhury
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
- Homi Bhabha National Institute
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Li S, Jiang J, Yan Y, Wang P, Huang G, Kim NH, Lee JH, He D. Red, green, and blue fluorescent folate-receptor-targeting carbon dots for cervical cancer cellular and tissue imaging. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 93:1054-1063. [DOI: 10.1016/j.msec.2018.08.058] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 10/31/2017] [Accepted: 08/29/2018] [Indexed: 10/28/2022]
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Bhattacharya A, Mukherjee TK. Synergistic Enhancement of Electron-Accepting and -Donating Ability of Nonconjugated Polymer Nanodot in Micellar Environment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14718-14727. [PMID: 29206472 DOI: 10.1021/acs.langmuir.7b04030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Understanding the fundamental electron-transfer dynamics in photoactive carbon nanoparticles (CNPs) is vitally important for their fruitful application in photovoltaics and photocatalysis. Herein, photoinduced electron transfer (PET) to and from the nonconjugated polymer nanodot (PND), a new class of luminescent CNP, has been investigated in the presence of N,N-dimethylaniline (DMA) and methyl viologen (MV2+) in homogeneous methanol and sodium dodecyl sulfate (SDS) micelles. It has been observed that both DMA and MV2+ interact with the photoexcited PND and quench the PL intensity as well as excited-state lifetime in bulk methanol. While in bulk methanol, purely diffusion-controlled PET from DMA to MV2+ via PND has been observed, the mechanism and dynamics differ significantly in SDS micelles. In contrast to homogeneous methanol medium, a distinct synergic effect has been observed in SDS micelles. The presence of both DMA and MV2+ enhances the electron-accepting and -donating abilities of PND in SDS micelles. Time-resolved photoluminescence (PL) measurements reveal that the PET process in SDS micelles is nondiffusive in nature mainly due to instantaneous electron transfer at the confined micellar surface. These results have been explained on the basis of heterogeneous microenvironments of SDS micelles which compartmentalize the donor and acceptor inside its micellar pseudo phase. The present findings provide valuable insights into the intrinsic relation between redox and PL properties of nonconjugated PND.
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Affiliation(s)
- Arpan Bhattacharya
- Discipline of Chemistry, Indian Institute of Technology Indore , Simrol, Khandwa Road, Indore 453552, Madhya Pradesh India
| | - Tushar Kanti Mukherjee
- Discipline of Chemistry, Indian Institute of Technology Indore , Simrol, Khandwa Road, Indore 453552, Madhya Pradesh India
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Dong H, Kuzmanoski A, Wehner T, Müller-Buschbaum K, Feldmann C. Microwave-Assisted Polyol Synthesis of Water Dispersible Red-Emitting Eu 3+-Modified Carbon Dots. MATERIALS (BASEL, SWITZERLAND) 2016; 10:E25. [PMID: 28772378 PMCID: PMC5344616 DOI: 10.3390/ma10010025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 12/13/2016] [Accepted: 12/21/2016] [Indexed: 11/16/2022]
Abstract
Eu3+-modified carbon dots (C-dots), 3-5 nm in diameter, were prepared, functionalized, and stabilized via a one-pot polyol synthesis. The role of Eu2+/Eu3+, the influence of O₂ (oxidation) and H₂O (hydrolysis), as well as the impact of the heating procedure (conventional resistance heating and microwave (MW) heating) were explored. With the reducing conditions of the polyol at the elevated temperature of synthesis (200-230 °C), first of all, Eu2+ was obtained resulting in the blue emission of the C-dots. Subsequent to O₂-driven oxidation, Eu3+-modified, red-emitting C-dots were realized. However, the Eu3+ emission is rapidly quenched by water for C-dots prepared via conventional resistance heating. In contrast to the hydroxyl functionalization of conventionally-heated C-dots, MW-heating results in a carboxylate functionalization of the C-dots. Carboxylate-coordinated Eu3+, however, turned out as highly stable even in water. Based on this fundamental understanding of synthesis and material, in sum, a one-pot polyol approach is established that results in H₂O-dispersable C-dots with intense red Eu3+-line-type emission.
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Affiliation(s)
- Hailong Dong
- Karlsruhe Institute of Technology (KIT), Institut für Anorganische Chemie, Engesserstrasse 15, 76131 Karlsruhe, Germany.
| | - Ana Kuzmanoski
- Karlsruhe Institute of Technology (KIT), Institut für Anorganische Chemie, Engesserstrasse 15, 76131 Karlsruhe, Germany.
| | - Tobias Wehner
- Institute of Inorganic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany.
| | - Klaus Müller-Buschbaum
- Institute of Inorganic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany.
| | - Claus Feldmann
- Karlsruhe Institute of Technology (KIT), Institut für Anorganische Chemie, Engesserstrasse 15, 76131 Karlsruhe, Germany.
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19
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Samantara AK, Maji S, Ghosh A, Bag B, Dash R, Jena BK. Good's buffer derived highly emissive carbon quantum dots: excellent biocompatible anticancer drug carrier. J Mater Chem B 2016; 4:2412-2420. [DOI: 10.1039/c6tb00081a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile one-step approach has been developed for the synthesis of carbon quantum dots (CQDs) from Good’s buffer.
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Affiliation(s)
- Aneeya K. Samantara
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar 751013
- India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi-110 001
| | - Santanu Maji
- Institute of Life Sciences
- Bhubaneswar 751023
- India
- Manipal University
- India
| | | | - Bamaprasad Bag
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar 751013
- India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi-110 001
| | - Rupesh Dash
- Institute of Life Sciences
- Bhubaneswar 751023
- India
| | - Bikash Kumar Jena
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar 751013
- India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi-110 001
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20
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Zheng C, An X, Gong J. Novel pH sensitive N-doped carbon dots with both long fluorescence lifetime and high quantum yield. RSC Adv 2015. [DOI: 10.1039/c5ra01986a] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The pH sensitivity of CDs is associated with the surface structure.
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Affiliation(s)
- Cui Zheng
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai
- China
| | - Xueqin An
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai
- China
| | - Jun Gong
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai
- China
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21
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Lan M, Di Y, Zhu X, Ng TW, Xia J, Liu W, Meng X, Wang P, Lee CS, Zhang W. A carbon dot-based fluorescence turn-on sensor for hydrogen peroxide with a photo-induced electron transfer mechanism. Chem Commun (Camb) 2015; 51:15574-7. [DOI: 10.1039/c5cc05835j] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A carbon dot-based fluorescence turn-on sensor for hydrogen peroxide with a photo-induced electron transfer mechanism was developed.
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Affiliation(s)
- Minhuan Lan
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
| | - Yanfei Di
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
| | - Xiaoyue Zhu
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
| | - Tsz-Wai Ng
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
| | - Jing Xia
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- People's Republic of China
| | - Weimin Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- People's Republic of China
| | - Xiangmin Meng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- People's Republic of China
| | - Pengfei Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- People's Republic of China
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
| | - Wenjun Zhang
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science
- City University of Hong Kong
- Hong Kong SAR
- P. R. China
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