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Intramolecular interactions (O-H∙∙∙O, C-H∙∙∙N, N-H∙∙∙π) in isomers of neutral, cation, and anion dopamine molecules: A DFT study on the influence of solvents (water and ethanol). J Mol Model 2023; 29:67. [PMID: 36773132 DOI: 10.1007/s00894-023-05466-y] [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: 12/21/2022] [Accepted: 02/01/2023] [Indexed: 02/12/2023]
Abstract
CONTEXT Dopamine (DA) is one of the most important neurotransmitters associated with numerous neural disorders. This investigation reports the intramolecular interactions present in the isomers of neutral (DA0), anionic (DA-), and cationic (DA+) dopamine isomers in gas, water, and ethanol mediums. Neutral and anion isomers have O-H∙∙∙O, C-H∙∙∙N intramolecular hydrogen bonds and N-H∙∙∙π interactions. All the interactions are electrostatic in nature. Isomers of cation dopamine show no intramolecular interactions in the solvent. Natural charges from natural bond orbital (NBO) analysis show that O-H∙∙∙O bonds and the N-H∙∙∙π interactions are the most and least polar, respectively. 1H NMR study reveals the inverse linear correlation between shielding constant and electron density in a solvent medium. HOMO-LUMO energy gap indicates higher stability for neutral and cationic forms of dopamine isomers in water and ethanol medium. METHODS We have optimized all the structural forms of dopamine molecule using the Becke three hybrid exchange and Lee-Yang-Parr correlation functional with Grimme's dispersion correction, B3LYP-D3(BJ), and aug-cc-pVTZ basis set using the Gaussian16 software. Vibrational frequency analysis with no imaginary frequencies confirms the nature of global minima. The solvent studies (water and ethanol) were carried out using the SCRF keyword and the polarisable continuum model (PCM) of Miertus and Tomasi. NBO analysis and NMR studies were also performed for all conformers. Topology analysis was explored using the software Multiwfn.
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Sun X, Li G, Zeng S, Yuan L, Bai L, Zhang X. Ultra-high NH3 absorption by triazole cation-functionalized ionic liquids through multiple hydrogen bonding. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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Dong H, Girmatsion M, Wang R, Lu G, Xie Y, Guo Y, Qian H, Yao W. Construction of fluorescent logic gates for the detection of mercury(II) and ciprofloxacin based on phycocyanin. Methods Appl Fluoresc 2022; 10. [PMID: 35584692 DOI: 10.1088/2050-6120/ac7123] [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: 01/27/2022] [Accepted: 05/18/2022] [Indexed: 11/12/2022]
Abstract
Chemical pollutants such as heavy metals and antibiotics in the environment pose a huge threat to humans and animals. Our studies have demonstrated that the fluorescence of phycocyanin showed quenching responses towards both mercury (Hg2+) and ciprofloxacin (CIP), which acted in accordance with the "OR" molecular logic gate. In order to discriminate Hg2+ and CIP in application scenarios, cysteine (Cys) was utilized to design another "INHIBIT" logic gate, in which Hg2+ and Cys were the two inputs. Thus, an intelligent biosensor with dual-target identification capacity was successfully developed by using a fluorescent natural protein in an ingenious logic gate system.
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Affiliation(s)
- Han Dong
- State Key Laboratory of Food Science and Technology, Jiangnan University School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, CHINA
| | - Mogos Girmatsion
- Jiangnan University School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, CHINA
| | - Ruoyu Wang
- Jiangnan University School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, CHINA
| | - Gang Lu
- Safety & Quality Management Department, Inner Mongolia Mengniu Dairy (group) CO., LTD., Inner Mongolia Mengniu Dairy (group) CO., LTD., Hohhot, Inner Mongolia, 011500, CHINA
| | - Yunfei Xie
- State Key Laboratory of Food Science and Technology, Jiangnan University School of Food Science and Technology, Wuxi, Wuxi, Jiangsu, 214122, CHINA
| | - Yahui Guo
- State Key Laboratory of Food Science and Technology, Jiangnan University School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, CHINA
| | - He Qian
- State Key Laboratory of Food Science and Technology, Jiangnan University School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, CHINA
| | - Weirong Yao
- State Key Laboratory of Food Science and Technology, Jiangnan University School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, CHINA
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Girmatsion M, Adhanom A, Gebremedhin H, Mahmud A, Xie Y, Cheng Y, Yu H, Yao W, Guo Y, Qian H. Ultrasensitive and selective detection of Hg 2+ using fluorescent phycocyanin in an aqueous system. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:886-895. [PMID: 34129421 DOI: 10.1080/10934529.2021.1935600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 05/17/2021] [Accepted: 05/19/2021] [Indexed: 06/12/2023]
Abstract
Hg2+ toxicity is one of the most common chemical poisonings that occurs mainly from drinking polluted water. In the current work, Phycocyanin (PC) was exploited as a fluorescent sensor for sensitive and selective detection of Hg2+ in an aqueous system. PC-Hg2+ interaction was monitored using a spectro-fluorometer under different buffered solutions at pH values of 6,7,8,9, or 10 above the isoelectric point of PC (5.18). A remarkable decrease of PC fluorescence intensity was observed under Tris-buffer at pH 6 upon the addition of increasing Hg2+ concentrations (1-120 nM). Under the maintained experimental conditions, the current sensor showed a good linear relationship with R2 = 0.9971 and a limit of detection as low as 0.7 nM was achieved. In addition, a notable selectivity of Hg2+ over other nine heavy metals (Cu2+, Zn2+, Pb2+, Mg2+, Mn4+, Li+, Fe3+, Co2+, and Al3+) was achieved in the presence of 120 nM of each metal. Moreover, the current fluorescent detection assay was also tested in real samples of pond water, and recoveries as well as relative standard deviations within the acceptable limits were recorded.
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Affiliation(s)
- Mogos Girmatsion
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
- Department of Marine Food and Biotechnology, Massawa College of Marine Science and Technology, Massawa, Eritrea
| | - Awet Adhanom
- Department of Marine Food and Biotechnology, Massawa College of Marine Science and Technology, Massawa, Eritrea
- Ministry of Marine Resources, Quality control laboratory, Massawa, Eritrea
| | - Henok Gebremedhin
- Department of Marine Food and Biotechnology, Massawa College of Marine Science and Technology, Massawa, Eritrea
- Ministry of Marine Resources, Quality control laboratory, Massawa, Eritrea
| | - Abdu Mahmud
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
- Department of Marine Food and Biotechnology, Massawa College of Marine Science and Technology, Massawa, Eritrea
| | - Yunfei Xie
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Yuliang Cheng
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Hang Yu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Weirong Yao
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Yahui Guo
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - He Qian
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
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Cation-Anion Interactions, Stability, and IR Spectra of Dicationic Amino Acid-Based Ionic Liquids Probed Using Density Functional Theory. J Mol Model 2021; 27:180. [PMID: 34023983 DOI: 10.1007/s00894-021-04796-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
In this work, we have theoretically studied the dicationic ionic liquids (DILs) constructed from geminal methylimidazolium dication with varying amino acid anions and spacers using density functional theory. Amino acid-based DILs form via strong C-H···O hydrogen bonds. These hydrogen bonds have a significant role in stabilizing the DILs. The higher cation-anion interaction energy in the order of covalent bond energy and liquid density of DILs imply higher thermal stability than their mono analogues. The C-H stretching frequencies are above 3100 cm-1 in all complexes and form a signature for DILs. Interestingly, aliphatic and aromatic amino acid anions show similar molecular properties. Overall, the DILs formed from amino acids exhibit high stability and large surface tension and are chemically non-toxic; hence, they can replace inorganic DILs.
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Ponikvar-Svet M, Zeiger DN, Liebman JF. Interplay of thermochemistry and Structural Chemistry, the journal (volume 30, 2019, issues 1–2) and the discipline. Struct Chem 2020. [DOI: 10.1007/s11224-020-01494-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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