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Takahashi M, Ito N, Haruta N, Ninagawa H, Yazaki K, Sei Y, Sato T, Obata M. Environment-sensitive emission of anionic hydrogen-bonded urea-derivative-acetate-ion complexes and their aggregation-induced emission enhancement. Commun Chem 2021; 4:168. [PMID: 36697743 PMCID: PMC9814938 DOI: 10.1038/s42004-021-00601-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 11/08/2021] [Indexed: 01/28/2023] Open
Abstract
Anions often quench fluorescence (FL). However, strong ionic hydrogen bonding between fluorescent dyes and anion molecules has the potential to control the electronic state of FL dyes, creating new functions via non-covalent interactions. Here, we propose an approach, utilising ionic hydrogen bonding between urea groups and anions, to control the electronic states of fluorophores and develop an aggregation-induced emission enhancement (AIEE) system. The AIEE ionic hydrogen-bonded complex (IHBC) formed between 1,8-diphenylnaphthalene (p-2Urea), with aryl urea groups at the para-positions on the peri-phenyl rings, and acetate ions exhibits high environmental sensitivities in solution phases, and the FL quantum yield (QY) in ion-pair assemblies of the IHBC and tetrabutylammonium cations is more than five times higher than that of the IHBC in solution. Our versatile and simple approach for the design of AIEE dye facilitates the future development of environment-sensitive probes and solid-state emitting materials.
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Affiliation(s)
- Masaki Takahashi
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-4-37 Takeda, Kofu, Japan.
| | - Nozomu Ito
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-4-37 Takeda, Kofu, Japan
| | - Naoki Haruta
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-cho 34-4, Sakyo-ku, Kyoto, 606-8103, Japan.,Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan.,Unit of Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Hayato Ninagawa
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-4-37 Takeda, Kofu, Japan
| | - Kohei Yazaki
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-4-37 Takeda, Kofu, Japan
| | - Yoshihisa Sei
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Tohru Sato
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-cho 34-4, Sakyo-ku, Kyoto, 606-8103, Japan.,Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan.,Unit of Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Makoto Obata
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-4-37 Takeda, Kofu, Japan
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Pawaskar GM, Pangannaya S, Raval K, Trivedi DR, Raval R. Screening of chitin deacetylase producing microbes from marine source using a novel receptor on agar plate. Int J Biol Macromol 2019; 131:716-720. [PMID: 30902716 DOI: 10.1016/j.ijbiomac.2019.03.118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 02/09/2019] [Accepted: 03/18/2019] [Indexed: 11/18/2022]
Abstract
Chitosan is a deacetylated form of naturally occurring polymer; chitin. On an industrial scale, the deacetylation of chitin to chitosan is performed using harsh chemicals like sodium hydroxide. This not only adds to the environmental pollution but the product is also random in terms of its deacetylation. This shortcoming can be addressed by using enzymes like chitin deacetylase (CDA). The screening of these organisms would require a reliable, fast and sensitive screening method. The deacetylation of chitin into chitosan, releases acetate as the byproduct of the reaction. A receptor which specifically binds to the acetate ion was synthesized chemically. The receptor upon binding with the acetate ion emitted a fluorescence which could be viewed using the gel documentation unit. The receptor was optimized for the screening of CDA producing microbes with the positive fungal control as Penicillium sp. and bacterial control as Bacillus megaterium. A parallel study with the 4-Nitroacetanilide, the reported screening indicator for CDA was performed. The results obtained with the receptor in the present study were concordant with the 4-Nitroacetanilide. Upon standardization, the protocol was extended for the screening of CDA producing microbes from the marine crustacean dumped soil and water samples. The CDA activity of these microbes was further confirmed using spectrophotometric MBTH assay. This is the first report using this receptor for the screening of CDA producers. The method is not only sensitive but also reproducible and can be extended for a high throughput screening of CDA producers.
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Affiliation(s)
| | - Srikala Pangannaya
- Supramolecular Chemistry Laboratory, Department of Chemistry, National Institute of Technology Karnataka (NITK), Surathkal 575025, Karnataka, India
| | - Keyur Raval
- Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal 575025, Karnataka, India
| | - Darshak R Trivedi
- Supramolecular Chemistry Laboratory, Department of Chemistry, National Institute of Technology Karnataka (NITK), Surathkal 575025, Karnataka, India
| | - Ritu Raval
- Manipal Institute of Technology, MAHE, Manipal 576104, Karnataka, India.
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De SK, Mondal S, Sen P, Pal U, Pathak B, Rawat KS, Bardhan M, Bhattacharya M, Satpati B, De A, Senapati D. Crystal-defect-induced facet-dependent electrocatalytic activity of 3D gold nanoflowers for the selective nanomolar detection of ascorbic acid. NANOSCALE 2018; 10:11091-11102. [PMID: 29872830 DOI: 10.1039/c8nr03087a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Understanding and exploring the decisive factors responsible for superlative catalytic efficiency is necessary to formulate active electrode materials for improved electrocatalysis and high-throughput sensing. This research demonstrates the ability of bud-shaped gold nanoflowers (AuNFs), intermediates in the bud-to-blossom gold nanoflower synthesis, to offer remarkable electrocatalytic efficiency in the oxidation of ascorbic acid (AA) at nanomolar concentrations. Multicomponent sensing in a single potential sweep is measured using differential pulse voltammetry while the kinetic parameters are estimated using electrochemical impedance spectroscopy. The outstanding catalytic activity of bud-structured AuNF [iAuNFp(Bud)/iGCp ≅ 100] compared with other bud-to-blossom intermediate nanostructures is explained by studying their structural transitions, charge distributions, crystalline patterns, and intrinsic irregularities/defects. Detailed microscopic analysis shows that density of crystal defects, such as edges, terraces, steps, ledges, kinks, and dislocation, plays a major role in producing the high catalytic efficiency. An associated ab initio simulation provides necessary support for the projected role of different crystal facets as selective catalytic sites. Density functional theory corroborates the appearance of inter- and intra-molecular hydrogen bonding within AA molecules to control the resultant fingerprint peak potentials at variable concentrations. Bud-structured AuNF facilitates AA detection at nanomolar levels in a multicomponent pathological sample.
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Affiliation(s)
- Sandip Kumar De
- Chemical Science Division, Saha Institute of Nuclear Physics, Kolkata, West Bengal, India
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Ma W, Chen C, Kong K, Dong Q, Li K, Yuan M, Li D, Hou Z. Peroxotantalate-Based Ionic Liquid Catalyzed Epoxidation of Allylic Alcohols with Hydrogen Peroxide. Chemistry 2017; 23:7287-7296. [DOI: 10.1002/chem.201605661] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Wenbao Ma
- Key Laboratory for Advanced Materials; Research Institute of Industrial Catalysis; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Chen Chen
- Key Laboratory for Advanced Materials; Research Institute of Industrial Catalysis; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Kang Kong
- Key Laboratory for Advanced Materials; Research Institute of Industrial Catalysis; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Qifeng Dong
- Key Laboratory for Advanced Materials; Research Institute of Industrial Catalysis; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Kun Li
- Key Laboratory for Advanced Materials; Research Institute of Industrial Catalysis; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Mingming Yuan
- Key Laboratory for Advanced Materials; Research Institute of Industrial Catalysis; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Difan Li
- Key Laboratory for Advanced Materials; Research Institute of Industrial Catalysis; East China University of Science and Technology; Shanghai 200237 P.R. China
| | - Zhenshan Hou
- Key Laboratory for Advanced Materials; Research Institute of Industrial Catalysis; East China University of Science and Technology; Shanghai 200237 P.R. China
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Gong ZL, Zhong YW. H2PO4–- and Solvent-Induced Polymorphism of an Amide-Functionalized [Pt(N^C^N)Cl] Complex. Inorg Chem 2016; 55:10143-10151. [DOI: 10.1021/acs.inorgchem.6b01059] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zhong-Liang Gong
- Beijing National Laboratory for Molecular Sciences, CAS
Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, 2 Bei Yi Jie, Zhong Guan Cun, Haidian District, Beijing 100190, China
| | - Yu-Wu Zhong
- Beijing National Laboratory for Molecular Sciences, CAS
Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science, 2 Bei Yi Jie, Zhong Guan Cun, Haidian District, Beijing 100190, China
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