1
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Das J, Ghosh M, Ghosh B, Mandal P, Maji S, Das D. A single probe for solvent dependent optical recognition of iron(II/III) and arsenite: discrimination between iron redox states with single crystal X-ray structure evidence. Sci Rep 2023; 13:18039. [PMID: 37865670 PMCID: PMC10590385 DOI: 10.1038/s41598-023-43154-2] [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: 05/19/2023] [Accepted: 09/20/2023] [Indexed: 10/23/2023] Open
Abstract
The detection and discrimination of Fe2+ and Fe3+ ions have been investigated using a simple probe (L), produced by the condensation of ethylenediamine and 3-ethoxysalicyaldehyde. Single crystal X-ray structures demonstrate that L interacts with Fe2+ and Fe3+. In aqueous-DMSO media, the L recognises AsO2- by fluorescence and colorimetry techniques. The AsO2- aided PET inhibition and H-bond assisted chelation enhanced fluorescence (CHEF) boost fluorescence by 91-fold. The L can detect 0.354 ppb Fe2+, 0.22 ppb Fe3+ and 0.235 ppt AsO2-.
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Affiliation(s)
- Jayanta Das
- Department of Chemistry, The University of Burdwan, Burdwan, West Bengal, 713104, India
| | - Milan Ghosh
- Department of Chemistry, The University of Burdwan, Burdwan, West Bengal, 713104, India
| | - Biplab Ghosh
- Department of Chemistry, The University of Burdwan, Burdwan, West Bengal, 713104, India
| | - Prasenjit Mandal
- Department of Chemistry, The University of Burdwan, Burdwan, West Bengal, 713104, India
| | - Sangita Maji
- Department of Chemistry, The University of Burdwan, Burdwan, West Bengal, 713104, India
| | - Debasis Das
- Department of Chemistry, The University of Burdwan, Burdwan, West Bengal, 713104, India.
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2
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Kumar S, Singh S, Kumar A, Murthy K, Kumar Singh A. pH-Responsive luminescence sensing, photoredox catalysis and photodynamic applications of ruthenium(II) photosensitizers bearing imidazo[4,5-f][1,10]phenanthroline scaffolds. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214272] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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3
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Photochromism of dye containing Schiff base-metal complex: A revisit through spectro-kinetic, thermodynamic and theoretical analyses for the design of a molecular logic gate. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113505] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Keisar H, Lahav M, van der Boom ME. Integrated Molecular Logic Using a Multistate Electrochromic Platform. Chemphyschem 2019; 20:2403-2407. [PMID: 31402510 DOI: 10.1002/cphc.201900784] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Indexed: 01/08/2023]
Abstract
Herein, we present an approach that integrates molecular logic functions using surface-confined metallo-organic assemblies. These assemblies are electrochromic and mimic the behaviour of logic elements. The logic elements are addressed individually by electrochemical methods, and their outputs are simultaneously read-out optically by UV/Vis absorption spectroscopy. The versatility of our setup is demonstrated by the integration of two multi-component assemblies; each acting as ternary logic elements. We used also a laminated cell configuration to demonstrate color-to-color and color-to-transparent transitions. This concept offers a route for the future development of devices with multiple logic states.
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Affiliation(s)
- Hodaya Keisar
- Department of Organic Chemistry, The Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Michal Lahav
- Department of Organic Chemistry, The Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Milko E van der Boom
- Department of Organic Chemistry, The Weizmann Institute of Science, 7610001, Rehovot, Israel
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5
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Rai A, Singh AK, Sonkar AK, Tripathi K, Mishra L. An ensemble of Zn 2+ with a rhodamine B-3-allylsalicylaldehyde hydrazone as novel photosensitive material: Photochromism, photopatterning, photoprinting and molecular logic gates. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 216:1-6. [PMID: 30861474 DOI: 10.1016/j.saa.2019.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 02/20/2019] [Accepted: 03/03/2019] [Indexed: 06/09/2023]
Abstract
An ensemble of Zn2+ with Rhodamine B-3-allylsalicylaldehyde hydrazone (1-Zn2+), has been synthesized and fully characterized using spectroscopic techniques. A solution of 1-Zn2+ in THF, displays color changes from light yellow to pink color in the presence UV light (λ, 405 nm). The process is reversible and owes to keto-enol tautomerism which allows the opening of spirolactam ring of rhodamine in the presence of UV light. It is corroborated by the appearance of a new peak at λmax = 554 nm. The ensemble, 1-Zn2+ embedded in the matrix of silica gel, displays photo patterning phenomena initiated by the conventional light sources including sunlight. It also displays photoprinting property with a laser pen (λ 405 nm) and has been displayed by a videography. The module 1-Zn2+ meets real challenges through a simple synthetic route, fast response, and as a binary data storage system with non-destructive optical identity.
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Affiliation(s)
- Abhishek Rai
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Alok Kumar Singh
- Department of Chemistry, Babasaheb Bhimrao Ambedkar University, Lucknow, India
| | - Avinash Kumar Sonkar
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Kamini Tripathi
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Lallan Mishra
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India.
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6
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Pisagatti I, Gattuso G, Notti A, Parisi MF, Brancatelli G, Geremia S, Greco F, Millesi S, Pappalardo A, Spitaleri L, Gulino A. Recognition and optical sensing of amines by a quartz-bound 7-chloro-4-quinolylazopillar[5]arene monolayer. RSC Adv 2018; 8:33269-33275. [PMID: 35548123 PMCID: PMC9086462 DOI: 10.1039/c8ra06792a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 09/19/2018] [Indexed: 11/21/2022] Open
Abstract
Pillar[5]arene-decorated quartz slides for the direct detection of linear amines and diamines are now available.
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7
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Wang M, Li Z, Li H, He J, Li N, Xu Q, Lu J. Different Steric-Twist-Induced Ternary Memory Characteristics in Nonconjugated Copolymers with Pendant Naphthalene and 1,8-Naphthalimide Moieties. Chem Asian J 2017; 12:2744-2748. [DOI: 10.1002/asia.201701044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 08/15/2017] [Indexed: 01/04/2023]
Affiliation(s)
- Ming Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Zhuang Li
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Hua Li
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Jinghui He
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Najun Li
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Qingfeng Xu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Jianmei Lu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
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8
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Mondal PC, Singh V, Zharnikov M. Nanometric Assembly of Functional Terpyridyl Complexes on Transparent and Conductive Oxide Substrates: Structure, Properties, and Applications. Acc Chem Res 2017; 50:2128-2138. [PMID: 28829569 DOI: 10.1021/acs.accounts.7b00166] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Over the last few decades, molecular assemblies on solid substrates have become increasingly popular, challenging the traditional systems and materials in terms of better control over molecular structure and function at the nanoscale. A variety of such assemblies with high complexity and adjustable properties was generated on the basis of organic, inorganic, organometallic, polymeric, and biomolecular building blocks. Particular versatile elements in this context are terpyridyls due to their wide design flexibility, ease of functionalization, and ability to coordinate to a broad variety of transition-metal ions without forming diastereoisomers, which facilitates tuning of their optical and electronic properties. Specifically, metal-terpyridyl complexes are worthy building blocks for generating optoelectronically active assemblies on technologically relevant transparent and conductive oxide substrates. In this context, the present Account summarizes our recent results on the preparation, characterization, and applications of nanometric (2-10 nm) surface-confined molecular assemblies of Cu2+, Fe2+, Ru2+, and Os2+-terpyridyl complexes on SiOx-based substrates (glass, quartz, silicon, and ITO-coated glass). These assemblies rely on covalent bond formation between the iodo-/chloro-terminated functionalized SiOx substrates and the pendant group (mostly pyridyl) hosted on the terpyridyl complexes. Such an anchoring provides excellent thermal, temporal, radiative, and electrochemical stability to the assemblies as needed for technological applications. The functional, covalently assembled monolayers were extended to fabricate molecular dyads (bilayers), triads (trilayers), and oligomers by an established layer-by-layer procedure using suitable metallolinkers such as Cu2+, Ag+, and Pd2+. The chemical, optical, and electrochemical properties of these assemblies could be precisely adjusted by selection of proper metal-terpyridyl complexes and/or metallolinkers, so that the resulting systems served, relying on the specific design, as sensors, catalysts, molecular logic gates, and photochromic devices. For instance, a Cu-terpyridyl-based assembly on a glass substrate showed "turn on" detection of ascorbic acid. In another example, heterometallic molecular triads were exposed to redox-active NO+ for selective oxidation of the metal ions, and the optical readout was utilized for configuring multiple-input-based molecular logic gates. Furthermore, bias-driven (+0.6 to +1.6 V vs Ag/AgCl) optical properties of the heteroleptic Ru2+/Os2+-terpyridyl monolayers were modulated and "read out" by spectro-electrochemical techniques demonstrating high charge/information density (3-4 × 1014 electrons/cm2). Moreover, the manipulation of the M2+/3+ (M = Fe, Ru, and Os) redox wave in the assembly provided the possibility to create mixed-valence redox-states paving the way toward the fabrication of "multi-bit" memory systems. We truly believe that due to these intriguing characteristics and excellent stability, terpyridyl-based molecular assemblies have the potential to become a versatile platform for the next generation of smart optoelectronic devices.
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Affiliation(s)
- Prakash Chandra Mondal
- National Institute for Nanotechnology, University of Alberta, Edmonton, Alberta T6G 2M9, Canada
| | - Vikram Singh
- Centre
for Nanoscience and Nanotechnology, Panjab University, Chandigarh 160014, India
| | - Michael Zharnikov
- Applied
Physical Chemistry, Heidelberg University, 69120 Heidelberg, Germany
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9
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Marchante E, Maglione MS, Crivillers N, Rovira C, Mas-Torrent M. A four-state capacitance molecular switch based on a redox active tetrathiafulvalene self-assembled monolayer. RSC Adv 2017. [DOI: 10.1039/c6ra27011e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
A tetrathiafulvalene self-assembled monolayer has been successfully exploited as a 4-state electrochemical switch using the capacitance as output signal.
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Affiliation(s)
- E. Marchante
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN)
- 08193 Bellaterra
- Spain
| | - M. S. Maglione
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN)
- 08193 Bellaterra
- Spain
| | - N. Crivillers
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN)
- 08193 Bellaterra
- Spain
| | - C. Rovira
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN)
- 08193 Bellaterra
- Spain
| | - M. Mas-Torrent
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN)
- 08193 Bellaterra
- Spain
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10
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11
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Balgley R, de Ruiter G, Evmenenko G, Bendikov T, Lahav M, van der Boom ME. Light-Induced Conversion of Chemical Permeability to Enhance Electron and Molecular Transfer in Nanoscale Assemblies. J Am Chem Soc 2016; 138:16398-16406. [DOI: 10.1021/jacs.6b09781] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Renata Balgley
- Department
of Organic Chemistry, The Weizmann Institute of Science, 7610001 Rehovot, Israel
| | - Graham de Ruiter
- Department
of Organic Chemistry, The Weizmann Institute of Science, 7610001 Rehovot, Israel
| | - Guennadi Evmenenko
- Department
of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Tatyana Bendikov
- Department
of Chemical Research Support, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Michal Lahav
- Department
of Organic Chemistry, The Weizmann Institute of Science, 7610001 Rehovot, Israel
| | - Milko E. van der Boom
- Department
of Organic Chemistry, The Weizmann Institute of Science, 7610001 Rehovot, Israel
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12
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Alcón I, Gonidec M, Ajayakumar MR, Mas-Torrent M, Veciana J. A surface confined yttrium(iii) bis-phthalocyaninato complex: a colourful switch controlled by electrons. Chem Sci 2016; 7:4940-4944. [PMID: 30155142 PMCID: PMC6018459 DOI: 10.1039/c6sc00443a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/26/2016] [Indexed: 11/21/2022] Open
Abstract
SAMs of a Y(iii) double-decker complex on ITO have been prepared and their electrical and optical properties explored, exhibiting three accessible stable redox states with characteristic absorption bands in the visible spectra, corresponding to three complementary colors (i.e., green, blue and red). These absorption bands are exploited as output signals of this robust ternary electrochemical switch, behaving hence as an electrochromic molecular-based device.
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Affiliation(s)
- I Alcón
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering , Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 , Bellaterra , Spain . ;
| | - M Gonidec
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering , Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 , Bellaterra , Spain . ;
| | - M R Ajayakumar
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering , Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 , Bellaterra , Spain . ;
| | - M Mas-Torrent
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering , Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 , Bellaterra , Spain . ;
| | - J Veciana
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering , Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 , Bellaterra , Spain . ;
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13
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Zhong YW, Gong ZL, Shao JY, Yao J. Electronic coupling in cyclometalated ruthenium complexes. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.01.002] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Mondal PC, Manna AK. Synthesis of heteroleptic terpyridyl complexes of Fe(ii) and Ru(ii): optical and electrochemical studies. NEW J CHEM 2016. [DOI: 10.1039/c5nj03106k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Heteroleptic terpyridyl complexes of Fe(ii) and Ru(ii) are synthesized. They are characterized using complimentary techniques and their optical and electrochemical properties are studied. A detailed computational study was also performed.
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Affiliation(s)
| | - Arun Kumar Manna
- Department of Materials and Interfaces
- Weizmann Institute of Science
- Rehovot-7610001
- Israel
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15
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Rai A, Singh AK, Sonkar AK, Prakash A, Roy JK, Nagarajan R, Mishra L. A smart switchable module for the detection of multiple ions via turn-on dual-optical readout and their cell imaging studies. Dalton Trans 2016; 45:8272-7. [DOI: 10.1039/c6dt01090c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A rhodamine based switchable module, RHTH, displays multi-stimuli responses and logic gate based detection of Fe3+, Hg2+, CN− and S2− ions at ppm levels together with the imaging of these cations in HeLa cell lines.
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Affiliation(s)
- Abhishek Rai
- Department of Chemistry
- Banaras Hindu University
- Varanasi
- India
| | | | | | - Anand Prakash
- Department of Zoology
- Banaras Hindu University
- Varanasi
- India
| | | | | | - Lallan Mishra
- Department of Chemistry
- Banaras Hindu University
- Varanasi
- India
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16
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Nie HJ, Yang WW, Shao JY, Zhong YW. Ruthenium-tris(bipyridine) complexes with multiple redox-active amine substituents: tuning of spin density distribution and deep-red to NIR electrochromism and electrofluorochromism. Dalton Trans 2016; 45:10136-40. [DOI: 10.1039/c6dt02014c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Deep-red to NIR electrochromism and electrofluorochromism are demonstrated with ruthenium-tris(bipyridine) complexes with multiple amine substituents.
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Affiliation(s)
- Hai-Jing Nie
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Wen-Wen Yang
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Jiang-Yang Shao
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Yu-Wu Zhong
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
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17
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Nagashima T, Ozawa H, Suzuki T, Nakabayashi T, Kanaizuka K, Haga MA. Photoresponsive Molecular Memory Films Composed of Sequentially Assembled Heterolayers Containing Ruthenium Complexes. Chemistry 2015; 22:1658-67. [DOI: 10.1002/chem.201503591] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Takumi Nagashima
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga Bunkyo-ku Tokyo 112-8551 Japan
| | - Hiroaki Ozawa
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga Bunkyo-ku Tokyo 112-8551 Japan
| | - Takashi Suzuki
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga Bunkyo-ku Tokyo 112-8551 Japan
| | - Takuya Nakabayashi
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga Bunkyo-ku Tokyo 112-8551 Japan
| | - Katsuhiko Kanaizuka
- Department of Chemistry; Faculty of Science; Yamagata University; 1-4-12 Kojirakawa-machi Yamagata 990-8560 Japan
| | - Masa-aki Haga
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga Bunkyo-ku Tokyo 112-8551 Japan
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18
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Singh V, Mondal PC, Kumar A, Jeyachandran YL, Awasthi SK, Gupta RD, Zharnikov M. Surface confined heteroleptic copper(II)-polypyridyl complexes for photonuclease activity. Chem Commun (Camb) 2015; 50:11484-7. [PMID: 25131185 DOI: 10.1039/c4cc05063k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heteroleptic copper(II)-polypyridyl complexes with extended π-conjugated, aromatic terminal units were immobilized on glass/Si substrates to intercalate DNA and cleave it upon photoexposure. Photonuclease activity is shown to be high, well reproducible and non-destructible towards the assembled complexes.
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Affiliation(s)
- Vikram Singh
- Department of Chemistry, University of Delhi, Delhi-110 007, India
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19
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Mondal PC, Singh V, Jeyachandran YL, Zharnikov M. Surface-confined heterometallic triads on the basis of terpyridyl complexes and design of molecular logic gates. ACS APPLIED MATERIALS & INTERFACES 2015; 7:8677-8686. [PMID: 25853640 DOI: 10.1021/acsami.5b00953] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Surface-confined heterometallic molecular triads (SURHMTs) were fabricated on SiOx-based solid substrates using optically rich and redox-active Fe-, Os-, and Ru-based terpyridyl complexes as metalloligands and Cu(2+) ions as linkers. Optical and electrochemical studies reveal efficient electronic intramolecular communication in these assemblies. The UV-vis spectra of the triads exhibit a superposition of the metal-to-ligand charge-transfer bands of individual complexes, providing a significant enlargement of the optical window, useful for application. Similarly, cyclic voltammograms of SURHMT layers show a variety of redox peaks corresponding to individual complexes as well as multi-redox states at a low potential. Interaction of a representative SURHMT assembly with redox-active NOBF4 was investigated and used as a basis for configuring molecular logic gates.
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Affiliation(s)
- Prakash Chandra Mondal
- †Department of Chemistry, University of Delhi, Delhi 110007, India
- ‡Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Vikram Singh
- †Department of Chemistry, University of Delhi, Delhi 110007, India
| | | | - Michael Zharnikov
- §Applied Physical Chemistry, Heidelberg University, Heidelberg 69120, Germany
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20
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Kumar A, Chhatwal M, Gupta RD, Awasthi SK. Chemically-driven “molecular logic circuit” based on osmium chromophore with a resettable multiple readout. RSC Adv 2015. [DOI: 10.1039/c4ra14269a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Resettable molecular processing of inputs (Cu2+/H2O and F−/H+) to yield discriminating outputs and subsequent integration of logic circuits.
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Affiliation(s)
- Anup Kumar
- Chemical Biology Laboratory
- Department of Chemistry
- University of Delhi
- New Delhi-110 007
- India
| | - Megha Chhatwal
- Chemical Biology Laboratory
- Department of Chemistry
- University of Delhi
- New Delhi-110 007
- India
| | - Rinkoo D. Gupta
- Faculty of Life Sciences and Biotechnology
- South Asian University
- New Delhi-110 021
- India
| | - Satish Kumar Awasthi
- Chemical Biology Laboratory
- Department of Chemistry
- University of Delhi
- New Delhi-110 007
- India
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21
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Singh AK, Nagarajan R. A sequential logic gate-based “smart probe” for selective monitoring of Cu2+, Fe3+ and CN−/F−via differential analyses. Dalton Trans 2015; 44:19786-90. [DOI: 10.1039/c5dt03567h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A sequential logic gate-based probe for the detection of Cu2+, Fe3+, CN− and F− at ppm levels in water.
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Affiliation(s)
- Alok Kumar Singh
- Department of Chemistry
- University of Delhi
- New Delhi-110 007
- India
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22
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Mondal PC. Optical and electrochemical properties of covalent assembled bis(4′-carboxylic phenyl terpyridyl) Ru(ii)-monolayer. NEW J CHEM 2015. [DOI: 10.1039/c5nj01421b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monomolecular layers of Ru(ii)-4′carboxylicphenyl-terpyridyl complex are prepared on glass and ITO-coated glass substrates. The optical, electrochemical and stability studies indicate that the present system is highly robust.
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Singh AK. A fast and selective probe for detection of CN− and F− in water along with a sequential molecular logic circuit via resettable optical readout. RSC Adv 2015. [DOI: 10.1039/c5ra03668b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A fast and selective probe for detection of CN− and F− at ppm levels in water via multiple readout for precise analysis.
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Affiliation(s)
- Alok Kumar Singh
- Department of Chemistry
- University of Delhi
- New Delhi-110 007
- India
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Kreitner C, Grabolle M, Resch-Genger U, Heinze K. Dual Emission and Excited-State Mixed-Valence in a Quasi-Symmetric Dinuclear Ru–Ru Complex. Inorg Chem 2014; 53:12947-61. [DOI: 10.1021/ic5020362] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christoph Kreitner
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University
of Mainz, Duesbergweg 10–14, 55128 Mainz, Germany
- Graduate School Materials Science in Mainz, Staudingerweg
9, 55128 Mainz, Germany
| | - Markus Grabolle
- Federal Institute for Materials Research and Testing (BAM), Division 1.5, Richard-Willstätter-Str.
11, 12489 Berlin, Germany
| | - Ute Resch-Genger
- Federal Institute for Materials Research and Testing (BAM), Division 1.5, Richard-Willstätter-Str.
11, 12489 Berlin, Germany
| | - Katja Heinze
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University
of Mainz, Duesbergweg 10–14, 55128 Mainz, Germany
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Kumar A, Chhatwal M, Singh AK, Singh V, Trivedi M. A fast and selective probe for monitoring Pd2+in aqueous medium via the dual-optical readout. Chem Commun (Camb) 2014; 50:8488-90. [DOI: 10.1039/c4cc03891f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Mondal PC, Singh V, Shankar B. Fe-terpyridyl complex based multiple switches for application in molecular logic gates and circuits. NEW J CHEM 2014. [DOI: 10.1039/c4nj00121d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The Fe(ii)-terpyridyl binary complex is used as a molecular switch upon external chemical stimuli. The stability of different switching states, their reversibility upon further chemical stimulus, prompted construction of solution based molecular logic gates and circuits.
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Affiliation(s)
- Prakash Chandra Mondal
- Department of Chemistry
- University of Delhi
- Delhi-110007, India
- Department of Chemical Physics
- Weizmann Institute of Science
| | - Vikram Singh
- Department of Chemistry
- University of Delhi
- Delhi-110007, India
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